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authorPeter Mikkelsen <petermikkelsen10@gmail.com>2026-04-01 22:24:22 +0200
committerPeter Mikkelsen <petermikkelsen10@gmail.com>2026-04-04 19:51:35 +0200
commita809bc0f49ee4c6e777f39d1f80ee57862a0fcab (patch)
tree5187dbd9b83205aac62d1f48252025b6e2d158a9
Initial import of the code into gitv0.1
-rw-r--r--.gitignore46
-rw-r--r--.gitmodules3
-rw-r--r--AUTHORS3
-rw-r--r--COPYING674
-rw-r--r--ChangeLog1
-rw-r--r--INSTALL380
-rw-r--r--Makefile.am17
-rw-r--r--NEWS3
-rw-r--r--README0
-rw-r--r--README-hacking0
-rwxr-xr-xbootstrap1631
-rw-r--r--bootstrap.conf3
-rw-r--r--configure.ac40
-rw-r--r--doc/.gitignore11
-rw-r--r--doc/Makefile.am12
-rw-r--r--doc/aplwc.texi85
-rw-r--r--doc/fdl.texi505
-rw-r--r--doc/index_template.html59
m---------gnulib0
-rw-r--r--guix.scm.in24
-rw-r--r--lib/Makefile.am15
-rw-r--r--lib/aplwc.h34
-rw-r--r--lib/aplwc.pc.in12
-rw-r--r--lib/aplwc_internal.h31
-rw-r--r--lib/autocomplete.c94
-rw-r--r--lib/lookup_syscmd.c32
-rw-r--r--lib/new.c36
-rw-r--r--lib/register_syscmd.c39
-rw-r--r--po/.gitignore10
-rw-r--r--po/LINGUAS3
-rw-r--r--po/Makevars87
-rw-r--r--po/POTFILES.in7
-rw-r--r--po/da.po62
-rw-r--r--src/Makefile.am18
-rw-r--r--src/main.c92
-rw-r--r--src/nls.h36
-rw-r--r--src/readline.c56
-rw-r--r--src/readline.h31
-rw-r--r--src/syscmd.c36
-rw-r--r--src/syscmd.h28
-rw-r--r--tests/Makefile.am19
-rw-r--r--tests/atlocal.in1
-rw-r--r--tests/package.m4.in6
-rw-r--r--tests/testsuite.at19
44 files changed, 4301 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8a30185
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,46 @@
+/build-aux/
+/ABOUT-NLS
+**/*~
+**/Makefile.in
+aclocal.m4
+autom4te.cache
+config.h
+config.h.in
+configure
+gnu
+m4
+.tarball-version
+stamp-h1
+**/*.o
+**/.deps
+config.log
+config.status
+**/Makefile
+src/aplwc-repl
+aplwc-*.tar.gz
+/libtool
+/po/POTFILES
+/po/en@boldquot.insert-header
+/po/en@boldquot.po
+/po/en@quot.insert-header
+/po/en@quot.po
+/po/remove-potcdate.sed
+/po/aplwc.pot
+/po/*.gmo
+/po/stamp-po
+/doc/aplwc.dvi
+/doc/aplwc.t2d/
+**/.libs/*
+/lib/aplwc.pc
+/lib/*.lo
+/lib/libaplwc.la
+/testsuite.dir
+/testsuite.log
+/tests/atconfig
+/tests/atlocal
+/tests/package.m4
+/tests/testsuite
+/tests/testsuite.log
+/guix.scm
+/src/aplwc
+/src/aplwc.1
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..009ae43
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "gnulib"]
+ path = gnulib
+ url = git://git.savannah.gnu.org/gnulib.git
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..e97b303
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,3 @@
+Aplwc was written by:
+
+Peter Mikkelsen <petermikkelsen10@gmail.com> <peter@pmikkelsen.com>
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
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+ If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+ A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License. You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+ Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+ 12. No Surrender of Others' Freedom.
+
+ If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all. For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Use with the GNU Affero General Public License.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..51a75f2
--- /dev/null
+++ b/ChangeLog
@@ -0,0 +1 @@
+See the git log for recent changes.
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..d43221a
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,380 @@
+Installation Instructions
+*************************
+
+Basic Installation
+==================
+
+ The following shell commands:
+
+ test -f configure || ./bootstrap
+ ./configure
+ make
+ make install
+
+should configure, build, and install this package. The first line,
+which bootstraps, is intended for developers; when building from
+distribution tarballs it does nothing and can be skipped. A package
+might name the bootstrapping script differently; if the name is
+‘autogen.sh’, for example, the first line should say ‘./autogen.sh’
+instead of ‘./bootstrap’.
+
+ The following more-detailed instructions are generic; see the
+‘README’ file for instructions specific to this package. Some packages
+provide this ‘INSTALL’ file but do not implement all of the features
+documented below. The lack of an optional feature in a given package is
+not necessarily a bug. More recommendations for GNU packages can be
+found in the GNU Coding Standards.
+
+ Many packages have scripts meant for developers instead of ordinary
+builders, as they may use developer tools that are less commonly
+installed, or they may access the network, which has privacy
+implications. These scripts attempt to bootstrap by building the
+‘configure’ script and related files, possibly using developer tools or
+the network. Because the output of bootstrapping is system-independent,
+it is normally run by a package developer so that its output can be put
+into the distribution tarball and ordinary builders and users need not
+bootstrap. Some packages have commands like ‘./autopull.sh’ and
+‘./autogen.sh’ that you can run instead of ‘./bootstrap’, for more
+fine-grained control over bootstrapping.
+
+ The ‘configure’ script attempts to guess correct values for various
+system-dependent variables used during compilation. It uses those
+values to create a ‘Makefile’ in each directory of the package. It may
+also create one or more ‘.h’ files containing system-dependent
+definitions. Finally, it creates a script ‘config.status’ that you can
+run in the future to recreate the current configuration, and a file
+‘config.log’ containing output useful for debugging ‘configure’.
+
+ It can also use an optional file (typically called ‘config.cache’ and
+enabled with ‘--cache-file=config.cache’ or simply ‘-C’) that saves the
+results of its tests to speed up reconfiguring. Caching is disabled by
+default to prevent problems with accidental use of stale cache files.
+
+ If you need to do unusual things to compile the package, please try
+to figure out how ‘configure’ could check whether to do them, and mail
+diffs or instructions to the address given in the ‘README’ so they can
+be considered for the next release. If you are using the cache, and at
+some point ‘config.cache’ contains results you don’t want to keep, you
+may remove or edit it.
+
+ The ‘autoconf’ program generates ‘configure’ from the file
+‘configure.ac’. Normally you should edit ‘configure.ac’ instead of
+editing ‘configure’ directly.
+
+ The simplest way to compile this package is:
+
+ 1. ‘cd’ to the directory containing the package’s source code.
+
+ 2. If this is a developer checkout and file ‘configure’ does not yet
+ exist, run the bootstrapping script (typically ‘./bootstrap’ or
+ ‘./autogen.sh’) to bootstrap and create the file. You may need
+ special developer tools and network access to bootstrap, and the
+ network access may have privacy implications.
+
+ 3. Type ‘./configure’ to configure the package for your system. This
+ might take a while. While running, ‘configure’ prints messages
+ telling which features it is checking for.
+
+ 4. Type ‘make’ to compile the package.
+
+ 5. Optionally, type ‘make check’ to run any self-tests that come with
+ the package, generally using the just-built uninstalled binaries.
+
+ 6. Type ‘make install’ to install the programs and any data files and
+ documentation. When installing into a prefix owned by root, it is
+ recommended that the package be configured and built as a regular
+ user, and only the ‘make install’ phase executed with root
+ privileges.
+
+ 7. Optionally, type ‘make installcheck’ to repeat any self-tests, but
+ this time using the binaries in their final installed location.
+ This target does not install anything. Running this target as a
+ regular user, particularly if the prior ‘make install’ required
+ root privileges, verifies that the installation completed
+ correctly.
+
+ 8. You can remove the program binaries and object files from the
+ source code directory by typing ‘make clean’. To also remove the
+ files that ‘configure’ created (so you can compile the package for
+ a different kind of computer), type ‘make distclean’. There is
+ also a ‘make maintainer-clean’ target, but that is intended mainly
+ for the package’s developers. If you use it, you may have to
+ bootstrap again.
+
+ 9. If the package follows the GNU Coding Standards, you can type ‘make
+ uninstall’ to remove the installed files.
+
+Installation Prerequisites
+==========================
+
+ Installation requires a POSIX-like environment with a shell and at
+least the following standard utilities:
+
+ awk cat cp diff echo expr false ls mkdir mv printf pwd rm rmdir sed
+ sort test tr
+
+This package’s installation may need other standard utilities such as
+‘grep’, ‘make’, ‘sleep’ and ‘touch’, along with compilers like ‘gcc’.
+
+Compilers and Options
+=====================
+
+ Some systems require unusual options for compilation or linking that
+the ‘configure’ script does not know about. Run ‘./configure --help’
+for details on some of the pertinent environment variables.
+
+ You can give ‘configure’ initial values for configuration parameters
+by setting variables in the command line or in the environment. Here is
+an example:
+
+ ./configure CC=gcc CFLAGS=-g LIBS=-lposix
+
+ See “Defining Variables” for more details.
+
+Compiling For Multiple Architectures
+====================================
+
+ You can compile the package for more than one kind of computer at the
+same time, by placing the object files for each system in their own
+directory. To do this, you can use GNU ‘make’. ‘cd’ to the directory
+where you want the object files and executables to go and run the
+‘configure’ script. ‘configure’ automatically checks for the source
+code in the directory that ‘configure’ is in and in ‘..’. This is known
+as a “VPATH” build.
+
+ With a non-GNU ‘make’, it is safer to compile the package for one
+system at a time in the source code directory. After you have installed
+the package for one system, use ‘make distclean’ before reconfiguring
+for another system.
+
+ Some platforms, notably macOS, support “fat” or “universal” binaries,
+where a single binary can execute on different architectures. On these
+platforms you can configure and compile just once, with options specific
+to that platform.
+
+Installation Names
+==================
+
+ By default, ‘make install’ installs the package’s commands under
+‘/usr/local/bin’, include files under ‘/usr/local/include’, etc. You
+can specify an installation prefix other than ‘/usr/local’ by giving
+‘configure’ the option ‘--prefix=PREFIX’, where PREFIX must be an
+absolute file name.
+
+ You can specify separate installation prefixes for
+architecture-specific files and architecture-independent files. If you
+pass the option ‘--exec-prefix=PREFIX’ to ‘configure’, the package uses
+PREFIX as the prefix for installing programs and libraries.
+Documentation and other data files still use the regular prefix.
+
+ In addition, if you use an unusual directory layout you can give
+options like ‘--bindir=DIR’ to specify different values for particular
+kinds of files. Run ‘configure --help’ for a list of the directories
+you can set and what kinds of files go in them. In general, the default
+for these options is expressed in terms of ‘${prefix}’, so that
+specifying just ‘--prefix’ will affect all of the other directory
+specifications that were not explicitly provided.
+
+ The most portable way to affect installation locations is to pass the
+correct locations to ‘configure’; however, many packages provide one or
+both of the following shortcuts of passing variable assignments to the
+‘make install’ command line to change installation locations without
+having to reconfigure or recompile.
+
+ The first method involves providing an override variable for each
+affected directory. For example, ‘make install
+prefix=/alternate/directory’ will choose an alternate location for all
+directory configuration variables that were expressed in terms of
+‘${prefix}’. Any directories that were specified during ‘configure’,
+but not in terms of ‘${prefix}’, must each be overridden at install time
+for the entire installation to be relocated. The approach of makefile
+variable overrides for each directory variable is required by the GNU
+Coding Standards, and ideally causes no recompilation. However, some
+platforms have known limitations with the semantics of shared libraries
+that end up requiring recompilation when using this method, particularly
+noticeable in packages that use GNU Libtool.
+
+ The second method involves providing the ‘DESTDIR’ variable. For
+example, ‘make install DESTDIR=/alternate/directory’ will prepend
+‘/alternate/directory’ before all installation names. The approach of
+‘DESTDIR’ overrides is not required by the GNU Coding Standards, and
+does not work on platforms that have drive letters. On the other hand,
+it does better at avoiding recompilation issues, and works well even
+when some directory options were not specified in terms of ‘${prefix}’
+at ‘configure’ time.
+
+Optional Features
+=================
+
+ If the package supports it, you can cause programs to be installed
+with an extra prefix or suffix on their names by giving ‘configure’ the
+option ‘--program-prefix=PREFIX’ or ‘--program-suffix=SUFFIX’.
+
+ Some packages pay attention to ‘--enable-FEATURE’ and
+‘--disable-FEATURE’ options to ‘configure’, where FEATURE indicates an
+optional part of the package. They may also pay attention to
+‘--with-PACKAGE’ and ‘--without-PACKAGE’ options, where PACKAGE is
+something like ‘gnu-ld’. ‘./configure --help’ should mention the
+‘--enable-...’ and ‘--with-...’ options that the package recognizes.
+
+ Some packages offer the ability to configure how verbose the
+execution of ‘make’ will be. For these packages, running ‘./configure
+--enable-silent-rules’ sets the default to minimal output, which can be
+overridden with ‘make V=1’; while running ‘./configure
+--disable-silent-rules’ sets the default to verbose, which can be
+overridden with ‘make V=0’.
+
+Specifying a System Type
+========================
+
+ By default ‘configure’ builds for the current system. To create
+binaries that can run on a different system type, specify a
+‘--host=TYPE’ option along with compiler variables that specify how to
+generate object code for TYPE. For example, to create binaries intended
+to run on a 64-bit ARM processor:
+
+ ./configure --host=aarch64-linux-gnu \
+ CC=aarch64-linux-gnu-gcc \
+ CXX=aarch64-linux-gnu-g++
+
+If done on a machine that can execute these binaries (e.g., via
+‘qemu-aarch64’, ‘$QEMU_LD_PREFIX’, and Linux’s ‘binfmt_misc’
+capability), the build behaves like a native build. Otherwise it is a
+cross-build: ‘configure’ will make cross-compilation guesses instead of
+running test programs, and ‘make check’ will not work.
+
+ A system type can either be a short name like ‘mingw64’, or a
+canonical name like ‘x86_64-pc-linux-gnu’. Canonical names have the
+form CPU-COMPANY-SYSTEM where SYSTEM is either OS or KERNEL-OS. To
+canonicalize and validate a system type, you can run the command
+‘config.sub’, which is often squirreled away in a subdirectory like
+‘build-aux’. For example:
+
+ $ build-aux/config.sub arm64-linux
+ aarch64-unknown-linux-gnu
+ $ build-aux/config.sub riscv-lnx
+ Invalid configuration 'riscv-lnx': OS 'lnx' not recognized
+
+You can look at the ‘config.sub’ file to see which types are recognized.
+If the file is absent, this package does not need the system type.
+
+ If ‘configure’ fails with the diagnostic “cannot guess build type”.
+‘config.sub’ did not recognize your system’s type. In this case, first
+fetch the newest versions of these files from the GNU config package
+(https://savannah.gnu.org/projects/config). If that fixes things,
+please report it to the maintainers of the package containing
+‘configure’. Otherwise, you can try the configure option ‘--build=TYPE’
+where TYPE comes close to your system type; also, please report the
+problem to <config-patches@gnu.org>.
+
+ For more details about configuring system types, see the Autoconf
+documentation.
+
+Sharing Defaults
+================
+
+ If you want to set default values for ‘configure’ scripts to share,
+you can create a site shell script called ‘config.site’ that gives
+default values for variables like ‘CC’, ‘cache_file’, and ‘prefix’.
+‘configure’ looks for ‘PREFIX/share/config.site’ if it exists, then
+‘PREFIX/etc/config.site’ if it exists. Or, you can set the
+‘CONFIG_SITE’ environment variable to the location of the site script.
+A warning: not all ‘configure’ scripts look for a site script.
+
+Defining Variables
+==================
+
+ Variables not defined in a site shell script can be set in the
+environment passed to ‘configure’. However, some packages may run
+configure again during the build, and the customized values of these
+variables may be lost. In order to avoid this problem, you should set
+them in the ‘configure’ command line, using ‘VAR=value’. For example:
+
+ ./configure CC=/usr/local2/bin/gcc
+
+causes the specified ‘gcc’ to be used as the C compiler (unless it is
+overridden in the site shell script).
+
+Unfortunately, this technique does not work for ‘CONFIG_SHELL’ due to an
+Autoconf limitation. Until the limitation is lifted, you can use this
+workaround:
+
+ CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
+
+‘configure’ Invocation
+======================
+
+ ‘configure’ recognizes the following options to control how it
+operates.
+
+‘--help’
+‘-h’
+ Print a summary of all of the options to ‘configure’, and exit.
+
+‘--help=short’
+‘--help=recursive’
+ Print a summary of the options unique to this package’s
+ ‘configure’, and exit. The ‘short’ variant lists options used only
+ in the top level, while the ‘recursive’ variant lists options also
+ present in any nested packages.
+
+‘--version’
+‘-V’
+ Print the version of Autoconf used to generate the ‘configure’
+ script, and exit.
+
+‘--cache-file=FILE’
+ Enable the cache: use and save the results of the tests in FILE,
+ traditionally ‘config.cache’. FILE defaults to ‘/dev/null’ to
+ disable caching.
+
+‘--config-cache’
+‘-C’
+ Alias for ‘--cache-file=config.cache’.
+
+‘--srcdir=DIR’
+ Look for the package’s source code in directory DIR. Usually
+ ‘configure’ can determine that directory automatically.
+
+‘--prefix=DIR’
+ Use DIR as the installation prefix. See “Installation Names” for
+ more details, including other options available for fine-tuning the
+ installation locations.
+
+‘--host=TYPE’
+ Build binaries for system TYPE. See “Specifying a System Type”.
+
+‘--enable-FEATURE’
+‘--disable-FEATURE’
+ Enable or disable the optional FEATURE. See “Optional Features”.
+
+‘--with-PACKAGE’
+‘--without-PACKAGE’
+ Use or omit PACKAGE when building. See “Optional Features”.
+
+‘--quiet’
+‘--silent’
+‘-q’
+ Do not print messages saying which checks are being made. To
+ suppress all normal output, redirect it to ‘/dev/null’ (any error
+ messages will still be shown).
+
+‘--no-create’
+‘-n’
+ Run the configure checks, but stop before creating any output
+ files.
+
+‘configure’ also recognizes several environment variables, and accepts
+some other, less widely useful, options. Run ‘configure --help’ for
+more details.
+
+Copyright notice
+================
+
+ Copyright © 1994–1996, 1999–2002, 2004–2017, 2020–2025 Free Software
+Foundation, Inc.
+
+ Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved. This file is offered as-is,
+without warranty of any kind.
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..afb820f
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,17 @@
+EXTRA_DIST = m4/gnulib-cache.m4
+SUBDIRS = gnu lib src doc po tests
+
+dist-hook: dist-tarball-version
+.PHONY: dist-tarball-version
+dist-tarball-version:
+ echo '$(VERSION)' > $(distdir)/.tarball-version
+
+dist-hook: gen-ChangeLog
+.PHONY: gen-ChangeLog
+gen-ChangeLog:
+ $(AM_V_GEN)if test -e $(srcdir)/.git; then \
+ LC_ALL=en_US.UTF-8 TZ=UTC0 \
+ $(top_srcdir)/build-aux/gitlog-to-changelog \
+ --srcdir=$(srcdir) > $(distdir)/ChangeLog \
+ || exit 1; \
+ fi
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..9c3f098
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,3 @@
+Version 0.1
+
+* Initial import of the code into git.
diff --git a/README b/README
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/README
diff --git a/README-hacking b/README-hacking
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/README-hacking
diff --git a/bootstrap b/bootstrap
new file mode 100755
index 0000000..b3e14f5
--- /dev/null
+++ b/bootstrap
@@ -0,0 +1,1631 @@
+#! /bin/sh
+# DO NOT EDIT! GENERATED AUTOMATICALLY!
+
+# Bootstrap this package from checked-out sources.
+
+scriptversion=2026-04-01.20; # UTC
+
+# Copyright (C) 2003-2026 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+# Originally written by Paul Eggert. The canonical version of this
+# script is maintained as top/bootstrap in gnulib. However, to be
+# useful to your package, you should place a copy of it under version
+# control in the top-level directory of your package. The intent is
+# that all customization can be done with a bootstrap.conf file also
+# maintained in your version control; gnulib comes with a template
+# build-aux/bootstrap.conf to get you started.
+
+# Please report bugs or propose patches to bug-gnulib@gnu.org.
+
+me="$0"
+medir=`dirname "$me"`
+
+# Read the function library and the configuration.
+
+# A library of shell functions for autopull.sh, autogen.sh, and bootstrap.
+
+scriptlibversion=2025-12-04.19; # UTC
+
+# Copyright (C) 2003-2026 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+# Originally written by Paul Eggert. The canonical version of this
+# script is maintained as top/bootstrap-funclib.sh in gnulib. However,
+# to be useful to your package, you should place a copy of it under
+# version control in the top-level directory of your package. The
+# intent is that all customization can be done with a bootstrap.conf
+# file also maintained in your version control; gnulib comes with a
+# template build-aux/bootstrap.conf to get you started.
+
+nl='
+'
+
+# Ensure file names are sorted consistently across platforms.
+LC_ALL=C
+export LC_ALL
+
+# Honor $PERL, but work even if there is none.
+PERL="${PERL-perl}"
+
+default_gnulib_url=https://https.git.savannah.gnu.org/git/gnulib.git
+
+# Copyright year, for the --version output.
+copyright_year=`echo "$scriptlibversion" | sed -e 's/[^0-9].*//'`
+copyright="Copyright (C) ${copyright_year} Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law."
+
+# warnf_ FORMAT-STRING ARG1...
+warnf_ ()
+{
+ warnf_format_=$1
+ shift
+ nl='
+'
+ case $* in
+ *$nl*) me_=$(printf "$me"|tr "$nl|" '??')
+ printf "$warnf_format_" "$@" | sed "s|^|$me_: |" ;;
+ *) printf "$me: $warnf_format_" "$@" ;;
+ esac >&2
+}
+
+# warn_ WORD1...
+warn_ ()
+{
+ # If IFS does not start with ' ', set it and emit the warning in a subshell.
+ case $IFS in
+ ' '*) warnf_ '%s\n' "$*";;
+ *) (IFS=' '; warn_ "$@");;
+ esac
+}
+
+# die WORD1...
+die() { warn_ "$@"; exit 1; }
+
+# ------------------------------ Configuration. ------------------------------
+
+# Directory that contains package-specific gnulib modules and/or overrides.
+local_gl_dir=gl
+
+# Name of the Makefile.am
+# XXX Not used.
+gnulib_mk=gnulib.mk
+
+# List of gnulib modules needed.
+gnulib_modules=
+
+# Any gnulib files needed that are not in modules.
+gnulib_files=
+
+# A function to be called for each unrecognized option. Returns 0 if
+# the option in $1 has been processed by the function. Returns 1 if
+# the option has not been processed by the function. Override it via
+# your own definition in bootstrap.conf
+bootstrap_option_hook() { return 1; }
+
+# A function to be called in order to print the --help information
+# corresponding to user-defined command-line options.
+bootstrap_print_option_usage_hook() { :; }
+
+# A function to be called at the end of autopull.sh.
+# Override it via your own definition in bootstrap.conf.
+bootstrap_post_pull_hook() { :; }
+
+# A function to be called right after gnulib-tool is run.
+# Override it via your own definition in bootstrap.conf.
+bootstrap_post_import_hook() { :; }
+
+# A function to be called after everything else in this script.
+# Override it via your own definition in bootstrap.conf.
+bootstrap_epilogue() { :; }
+
+# The command to download all .po files for a specified domain into a
+# specified directory. Fill in the first %s with the destination
+# directory and the second with the domain name.
+po_download_command_format=\
+"wget --mirror --level=1 -nd -nv -A.po -P '%s' \
+ https://translationproject.org/latest/%s/"
+
+# When extracting the package name from an AC_INIT invocation,
+# prefer a non-empty tarname (4th argument of AC_INIT if given), else
+# fall back to the package name (1st argument with munging).
+extract_package_name='
+ /^AC_INIT(\[*/{
+ s///
+ /^[^,]*,[^,]*,[^,]*,[ []*\([^][ ,)]\)/{
+ s//\1/
+ s/[],)].*//
+ p
+ q
+ }
+ s/[],)].*//
+ p
+ }
+'
+normalize_package_name='
+ s/^GNU //
+ y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
+ s/[^abcdefghijklmnopqrstuvwxyz0123456789_]/-/g
+'
+package=$(${AUTOCONF:-autoconf} --trace 'AC_INIT:$4' configure.ac 2>/dev/null)
+if test -z "$package"; then
+ package=$(sed -n "$extract_package_name" configure.ac) \
+ || die 'cannot find package name in configure.ac'
+fi
+package=$(echo "$package" | sed "$normalize_package_name")
+gnulib_name=lib$package
+
+build_aux=build-aux
+source_base=lib
+m4_base=m4
+doc_base=doc
+tests_base=tests
+gnulib_extra_files="
+ build-aux/install-sh
+ build-aux/mdate-sh
+ build-aux/texinfo.tex
+ build-aux/depcomp
+ build-aux/config.guess
+ build-aux/config.sub
+ doc/INSTALL
+"
+
+# Additional gnulib-tool options to use. Use "\newline" to break lines.
+gnulib_tool_option_extras=
+
+# Other locale categories that need message catalogs.
+EXTRA_LOCALE_CATEGORIES=
+
+# Additional xgettext options to use. Use "\\\newline" to break lines.
+XGETTEXT_OPTIONS='\\\
+ --flag=_:1:pass-c-format\\\
+ --flag=N_:1:pass-c-format\\\
+ --flag=error:3:c-format --flag=error_at_line:5:c-format\\\
+'
+
+# Package bug report address and copyright holder for gettext files
+COPYRIGHT_HOLDER='Free Software Foundation, Inc.'
+MSGID_BUGS_ADDRESS=bug-$package@gnu.org
+
+# Files we don't want to import.
+# XXX Not used.
+excluded_files=
+
+# File that should exist in the top directory of a checked out hierarchy,
+# but not in a distribution tarball.
+checkout_only_file=README-hacking
+
+# Set this to '.cvsignore .gitignore' in bootstrap.conf if you want
+# those files to be generated in directories like lib/, m4/, and po/.
+# Or set it to 'auto' to make this script select which to use based
+# on which version control system (if any) is used in the source directory.
+vc_ignore=auto
+
+# Set this to true in bootstrap.conf to enable --bootstrap-sync by
+# default.
+bootstrap_sync=false
+
+# Override the default configuration, if necessary.
+# Make sure that bootstrap.conf is sourced from the current directory
+# if we were invoked as "sh bootstrap".
+conffile=`dirname "$me"`/bootstrap.conf
+test -r "$conffile" && . "$conffile"
+
+# ------------------------- Build-time prerequisites -------------------------
+
+check_exists() {
+ if test "$1" = "--verbose"; then
+ ($2 --version </dev/null) >/dev/null 2>&1
+ if test $? -ge 126; then
+ # If not found, run with diagnostics as one may be
+ # presented with env variables to set to find the right version
+ ($2 --version </dev/null)
+ fi
+ else
+ ($1 --version </dev/null) >/dev/null 2>&1
+ fi
+
+ test $? -lt 126
+}
+
+# Note this deviates from the version comparison in automake
+# in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a
+# but this should suffice as we won't be specifying old
+# version formats or redundant trailing .0 in bootstrap.conf.
+# If we did want full compatibility then we should probably
+# use m4_version_compare from autoconf.
+sort_ver() { # sort -V is not generally available
+ ver1="$1"
+ ver2="$2"
+
+ # split on '.' and compare each component
+ i=1
+ while : ; do
+ p1=$(echo "$ver1" | cut -d. -f$i)
+ p2=$(echo "$ver2" | cut -d. -f$i)
+ if [ ! "$p1" ]; then
+ echo "$1 $2"
+ break
+ elif [ ! "$p2" ]; then
+ echo "$2 $1"
+ break
+ elif [ ! "$p1" = "$p2" ]; then
+ if [ "$p1" -gt "$p2" ] 2>/dev/null; then # numeric comparison
+ echo "$2 $1"
+ elif [ "$p2" -gt "$p1" ] 2>/dev/null; then # numeric comparison
+ echo "$1 $2"
+ else # numeric, then lexicographic comparison
+ lp=$(printf "%s\n%s\n" "$p1" "$p2" | LANG=C sort -n | tail -n1)
+ if [ "$lp" = "$p2" ]; then
+ echo "$1 $2"
+ else
+ echo "$2 $1"
+ fi
+ fi
+ break
+ fi
+ i=$(($i+1))
+ done
+}
+
+get_version_sed='
+# Move version to start of line.
+s/.*[v ]\([0-9]\)/\1/
+
+# Skip lines that do not start with version.
+/^[0-9]/!d
+
+# Remove characters after the version.
+s/[^.a-z0-9-].*//
+
+# The first component must be digits only.
+s/^\([0-9]*\)[a-z-].*/\1/
+
+#the following essentially does s/5.005/5.5/
+s/\.0*\([1-9]\)/.\1/g
+p
+q'
+
+get_version() {
+ app=$1
+
+ $app --version >/dev/null 2>&1 || { $app --version; return 1; }
+
+ $app --version 2>&1 | sed -n "$get_version_sed"
+}
+
+check_versions() {
+ ret=0
+
+ while read app req_ver; do
+ # We only need libtoolize from the libtool package.
+ if test "$app" = libtool; then
+ app=libtoolize
+ fi
+ # Exempt git if git is not needed.
+ if test "$app" = git; then
+ $check_git || continue
+ fi
+ # Honor $APP variables ($TAR, $AUTOCONF, etc.)
+ appvar=$(echo $app | LC_ALL=C tr '[a-z]-' '[A-Z]_')
+ test "$appvar" = TAR && appvar=AMTAR
+ case $appvar in
+ GZIP) ;; # Do not use $GZIP: it contains gzip options.
+ PERL::*) ;; # Keep perl modules as-is
+ *) eval "app=\${$appvar-$app}" ;;
+ esac
+
+ # Handle the still-experimental Automake-NG programs specially.
+ # They remain named as the mainstream Automake programs ("automake",
+ # and "aclocal") to avoid gratuitous incompatibilities with
+ # preexisting usages (by, say, autoreconf, or custom autogen.sh
+ # scripts), but correctly identify themselves (as being part of
+ # "GNU automake-ng") when asked their version.
+ case $app in
+ automake-ng|aclocal-ng)
+ app=${app%-ng}
+ ($app --version | grep '(GNU automake-ng)') >/dev/null 2>&1 || {
+ warn_ "Error: '$app' not found or not from Automake-NG"
+ ret=1
+ continue
+ } ;;
+ # Another check is for perl modules. These can be written as
+ # e.g. perl::XML::XPath in case of XML::XPath module, etc.
+ perl::*)
+ # Extract module name
+ app="${app#perl::}"
+ if ! $PERL -m"$app" -e 'exit 0' >/dev/null 2>&1; then
+ warn_ "Error: perl module '$app' not found"
+ ret=1
+ fi
+ continue
+ ;;
+ esac
+ if [ "$req_ver" = "-" ]; then
+ # Merely require app to exist; not all prereq apps are well-behaved
+ # so we have to rely on $? rather than get_version.
+ if ! check_exists --verbose $app; then
+ warn_ "Error: '$app' not found"
+ ret=1
+ fi
+ else
+ # Require app to produce a new enough version string.
+ inst_ver=$(get_version $app)
+ if [ ! "$inst_ver" ]; then
+ warn_ "Error: '$app' not found"
+ ret=1
+ else
+ latest_ver=$(sort_ver $req_ver $inst_ver | cut -d' ' -f2)
+ if [ ! "$latest_ver" = "$inst_ver" ]; then
+ warnf_ '%s\n' \
+ "Error: '$app' version == $inst_ver is too old" \
+ " '$app' version >= $req_ver is required"
+ ret=1
+ fi
+ fi
+ fi
+ done
+
+ return $ret
+}
+
+print_versions() {
+ echo "Program Min_version"
+ echo "----------------------"
+ printf %s "$buildreq"
+ echo "----------------------"
+ # can't depend on column -t
+}
+
+# check_build_prerequisites check_git
+check_build_prerequisites()
+{
+ check_git="$1"
+
+ # gnulib-tool requires at least automake and autoconf.
+ # If either is not listed, add it (with minimum version) as a prerequisite.
+ case $buildreq in
+ *automake*) ;;
+ *) buildreq="automake 1.9
+$buildreq" ;;
+ esac
+ case $buildreq in
+ *autoconf*) ;;
+ *) buildreq="autoconf 2.59
+$buildreq" ;;
+ esac
+
+ # When we can deduce that gnulib-tool will require patch,
+ # and when patch is not already listed as a prerequisite, add it, too.
+ if test -d "$local_gl_dir" \
+ && ! find "$local_gl_dir" -name '*.diff' -exec false {} +; then
+ case $buildreq in
+ *patch*) ;;
+ *) buildreq="patch -
+$buildreq" ;;
+ esac
+ fi
+
+ if ! printf '%s' "$buildreq" | check_versions; then
+ echo >&2
+ if test -f README-prereq; then
+ die "See README-prereq for how to get the prerequisite programs"
+ else
+ die "Please install the prerequisite programs"
+ fi
+ fi
+
+ # Warn the user if autom4te appears to be broken; this causes known
+ # issues with at least gettext 0.18.3.
+ probe=$(echo 'm4_quote([hi])' | autom4te -l M4sugar -t 'm4_quote:$%' -)
+ if test "x$probe" != xhi; then
+ warn_ "WARNING: your autom4te wrapper eats stdin;"
+ warn_ "if bootstrap fails, consider upgrading your autotools"
+ fi
+}
+
+# find_tool ENVVAR NAMES...
+# -------------------------
+# Search for a required program. Use the value of ENVVAR, if set,
+# otherwise find the first of the NAMES that can be run.
+# If found, set ENVVAR to the program name, die otherwise.
+#
+# FIXME: code duplication, see also gnu-web-doc-update.
+find_tool ()
+{
+ find_tool_envvar=$1
+ shift
+ find_tool_names=$@
+ eval "find_tool_res=\$$find_tool_envvar"
+ if test x"$find_tool_res" = x; then
+ for i; do
+ if check_exists $i; then
+ find_tool_res=$i
+ break
+ fi
+ done
+ fi
+ if test x"$find_tool_res" = x; then
+ warn_ "one of these is required: $find_tool_names;"
+ die "alternatively set $find_tool_envvar to a compatible tool"
+ fi
+ eval "$find_tool_envvar=\$find_tool_res"
+ eval "export $find_tool_envvar"
+}
+
+# --------------------- Preparing GNULIB_SRCDIR for use. ---------------------
+# This is part of autopull.sh, but bootstrap needs it too, for self-upgrading.
+
+# cleanup_gnulib fails, removing the directory $gnulib_path first.
+cleanup_gnulib() {
+ status=$?
+ rm -fr "$gnulib_path"
+ exit $status
+}
+
+git_modules_config () {
+ test -f .gitmodules && git config --file .gitmodules "$@"
+}
+
+prepare_GNULIB_SRCDIR ()
+{
+ if test -n "$GNULIB_SRCDIR"; then
+ # Use GNULIB_SRCDIR directly.
+ # We already checked that $GNULIB_SRCDIR references a directory.
+ # Verify that it contains a gnulib checkout.
+ test -f "$GNULIB_SRCDIR/gnulib-tool" \
+ || die "Error: --gnulib-srcdir or \$GNULIB_SRCDIR is specified," \
+ "but does not contain gnulib-tool"
+ if test -n "$GNULIB_REVISION" && $use_git; then
+ # The 'git checkout "$GNULIB_REVISION"' command succeeds if the
+ # GNULIB_REVISION is a commit hash that exists locally, or if it is
+ # branch name that can be fetched from origin. It fails, however,
+ # if the GNULIB_REVISION is a commit hash that only exists in
+ # origin. In this case, we need a 'git fetch' and then retry
+ # 'git checkout "$GNULIB_REVISION"'.
+ git -C "$GNULIB_SRCDIR" checkout "$GNULIB_REVISION" 2>/dev/null \
+ || { git -C "$GNULIB_SRCDIR" fetch origin \
+ && git -C "$GNULIB_SRCDIR" checkout "$GNULIB_REVISION"; } \
+ || exit $?
+ fi
+ else
+ if ! $use_git; then
+ die "Error: --no-git is specified," \
+ "but neither --gnulib-srcdir nor \$GNULIB_SRCDIR is specified"
+ fi
+ if git submodule -h | grep -- --reference > /dev/null; then
+ :
+ else
+ die "git version is too old, git >= 1.6.4 is required"
+ fi
+ gnulib_path=$(git_modules_config submodule.gnulib.path)
+ if test -n "$gnulib_path"; then
+ # A submodule 'gnulib' is configured.
+ # Get gnulib files. Populate $gnulib_path, updating the submodule.
+ if test -n "$GNULIB_REFDIR" && test -d "$GNULIB_REFDIR"/.git; then
+ # Use GNULIB_REFDIR as a reference.
+ echo "$0: getting gnulib files..."
+ git submodule update --init --reference "$GNULIB_REFDIR" "$gnulib_path"\
+ || exit $?
+ else
+ # GNULIB_REFDIR is not set or not usable. Ignore it.
+ if git_modules_config submodule.gnulib.url >/dev/null; then
+ echo "$0: getting gnulib files..."
+ git submodule init -- "$gnulib_path" || exit $?
+ git submodule update -- "$gnulib_path" || exit $?
+ else
+ die "Error: submodule 'gnulib' has no configured url"
+ fi
+ fi
+ else
+ gnulib_path='gnulib'
+ if test ! -d "$gnulib_path"; then
+ # The subdirectory 'gnulib' does not yet exist. Clone into it.
+ echo "$0: getting gnulib files..."
+ trap cleanup_gnulib HUP INT PIPE TERM
+ gnulib_url=${GNULIB_URL:-$default_gnulib_url}
+ if test -n "$GNULIB_REFDIR" && test -d "$GNULIB_REFDIR"/.git; then
+ # Use GNULIB_REFDIR as a reference.
+ git clone "$GNULIB_REFDIR" "$gnulib_path" \
+ && git -C "$gnulib_path" remote set-url origin "$gnulib_url" \
+ && if test -z "$GNULIB_REVISION"; then
+ git -C "$gnulib_path" pull origin \
+ && {
+ # We want the default branch of "$gnulib_url" (since that's
+ # the behaviour if GNULIB_REFDIR is not specified), not the
+ # current branch of "$GNULIB_REFDIR".
+ default_branch=`LC_ALL=C git -C "$gnulib_path" \
+ remote show origin \
+ | sed -n -e 's/^ *HEAD branch: //p'`
+ test -n "$default_branch" || default_branch='master'
+ git -C "$gnulib_path" checkout "$default_branch"
+ }
+ else
+ # The 'git checkout "$GNULIB_REVISION"' command succeeds if the
+ # GNULIB_REVISION is a commit hash that exists locally, or if it
+ # is a branch name that can be fetched from origin. It fails,
+ # however, if the GNULIB_REVISION is a commit hash that only
+ # exists in origin. In this case, we need a 'git fetch' and then
+ # retry 'git checkout "$GNULIB_REVISION"'.
+ git -C "$gnulib_path" checkout "$GNULIB_REVISION" 2>/dev/null \
+ || { git -C "$gnulib_path" fetch origin \
+ && git -C "$gnulib_path" checkout "$GNULIB_REVISION"; }
+ fi \
+ || cleanup_gnulib
+ else
+ # GNULIB_REFDIR is not set or not usable. Ignore it.
+ shallow='--depth 2'
+ if test -z "$GNULIB_REVISION"; then
+ git clone $shallow "$gnulib_url" "$gnulib_path" \
+ || cleanup_gnulib
+ else
+ # Only want a shallow checkout of $GNULIB_REVISION, but git does not
+ # support cloning by commit hash. So attempt a shallow fetch by
+ # commit hash to minimize the amount of data downloaded and changes
+ # needed to be processed, which can drastically reduce download and
+ # processing time for checkout. If the fetch by commit fails, a
+ # shallow fetch cannot be performed because we do not know what the
+ # depth of the commit is without fetching all commits. So fall back
+ # to fetching all commits.
+ # $GNULIB_REVISION can be a commit id, a tag name, or a branch name.
+ mkdir -p "$gnulib_path"
+ # Use a -c option to silence an annoying message
+ # "hint: Using 'master' as the name for the initial branch."
+ # (cf. <https://stackoverflow.com/questions/65524512/>).
+ git -C "$gnulib_path" -c init.defaultBranch=master init
+ git -C "$gnulib_path" remote add origin "$gnulib_url"
+ if git -C "$gnulib_path" fetch $shallow origin "$GNULIB_REVISION"
+ then
+ # "git fetch" of the specific commit succeeded.
+ git -C "$gnulib_path" reset --hard FETCH_HEAD \
+ || cleanup_gnulib
+ # "git fetch" does not fetch tags (at least in git version 2.43).
+ # If $GNULIB_REVISION is a tag (not a commit id or branch name),
+ # add the tag explicitly.
+ revision=`git -C "$gnulib_path" log -1 --pretty=format:%H`
+ branch=`LC_ALL=C git -C "$gnulib_path" remote show origin \
+ | sed -n -e 's/^ \([^ ]*\) * tracked$/\1/p'`
+ test "$revision" = "$GNULIB_REVISION" \
+ || test "$branch" = "$GNULIB_REVISION" \
+ || git -C "$gnulib_path" tag "$GNULIB_REVISION"
+ else
+ # Fetch the entire repository.
+ git -C "$gnulib_path" fetch origin \
+ || cleanup_gnulib
+ git -C "$gnulib_path" checkout "$GNULIB_REVISION" \
+ || cleanup_gnulib
+ fi
+ fi
+ fi
+ trap - HUP INT PIPE TERM
+ else
+ # The subdirectory 'gnulib' already exists.
+ if test -n "$GNULIB_REVISION"; then
+ if test -d "$gnulib_path/.git"; then
+ # The 'git checkout "$GNULIB_REVISION"' command succeeds if the
+ # GNULIB_REVISION is a commit hash that exists locally, or if it
+ # is a branch name that can be fetched from origin. It fails,
+ # however, if the GNULIB_REVISION is a commit hash that only
+ # exists in origin. In this case, we need a 'git fetch' and then
+ # retry 'git checkout "$GNULIB_REVISION"'.
+ git -C "$gnulib_path" checkout "$GNULIB_REVISION" 2>/dev/null \
+ || { git -C "$gnulib_path" fetch origin \
+ && git -C "$gnulib_path" checkout "$GNULIB_REVISION"; } \
+ || exit $?
+ else
+ die "Error: GNULIB_REVISION is specified in bootstrap.conf," \
+ "but '$gnulib_path' contains no git history"
+ fi
+ fi
+ fi
+ fi
+ # Verify that $gnulib_path contains a gnulib checkout.
+ test -f "$gnulib_path/gnulib-tool" \
+ || die "Error: '$gnulib_path' is supposed to contain a gnulib checkout," \
+ "but does not contain gnulib-tool"
+ GNULIB_SRCDIR=$gnulib_path
+ fi
+ # $GNULIB_SRCDIR now points to the version of gnulib to use, and
+ # we no longer need to use git or $gnulib_path below here.
+}
+
+# -------- Upgrading bootstrap to the version found in GNULIB_SRCDIR. --------
+
+upgrade_bootstrap ()
+{
+ if test -f "$medir"/bootstrap-funclib.sh; then
+ update_lib=true
+ { cmp -s "$medir"/bootstrap "$GNULIB_SRCDIR/top/bootstrap" \
+ && cmp -s "$medir"/bootstrap-funclib.sh \
+ "$GNULIB_SRCDIR/top/bootstrap-funclib.sh" \
+ && cmp -s "$medir"/autopull.sh "$GNULIB_SRCDIR/top/autopull.sh" \
+ && cmp -s "$medir"/autogen.sh "$GNULIB_SRCDIR/top/autogen.sh"; \
+ }
+ else
+ update_lib=false
+ cmp -s "$medir"/bootstrap "$GNULIB_SRCDIR/build-aux/bootstrap"
+ fi || {
+ if $update_lib; then
+ echo "$0: updating bootstrap & companions and restarting..."
+ else
+ echo "$0: updating bootstrap and restarting..."
+ fi
+ case $(sh -c 'echo "$1"' -- a) in
+ a) ignored=--;;
+ *) ignored=ignored;;
+ esac
+ u=$update_lib
+ exec sh -c \
+ '{ if '$u' && test -f "$1"; then cp "$1" "$3"; else cp "$2" "$3"; fi; } &&
+ { if '$u' && test -f "$4"; then cp "$4" "$5"; else rm -f "$5"; fi; } &&
+ { if '$u' && test -f "$6"; then cp "$6" "$7"; else rm -f "$7"; fi; } &&
+ { if '$u' && test -f "$8"; then cp "$8" "$9"; else rm -f "$9"; fi; } &&
+ shift && shift && shift && shift && shift &&
+ shift && shift && shift && shift &&
+ exec "${CONFIG_SHELL-/bin/sh}" "$@"' \
+ $ignored \
+ "$GNULIB_SRCDIR/top/bootstrap" "$GNULIB_SRCDIR/build-aux/bootstrap" \
+ "$medir/bootstrap" \
+ "$GNULIB_SRCDIR/top/bootstrap-funclib.sh" "$medir/bootstrap-funclib.sh" \
+ "$GNULIB_SRCDIR/top/autopull.sh" "$medir/autopull.sh" \
+ "$GNULIB_SRCDIR/top/autogen.sh" "$medir/autogen.sh" \
+ "$0" "$@" --no-bootstrap-sync
+ }
+}
+
+# ----------------------------------------------------------------------------
+
+if test x"$gnulib_modules$gnulib_files$gnulib_extra_files" = x; then
+ use_gnulib=false
+else
+ use_gnulib=true
+fi
+
+# -------- Fetch auxiliary files from the network. --------------------------
+
+autopull_usage() {
+ cat <<EOF
+Usage: $me [OPTION]...
+Bootstrap this package from the checked-out sources, phase 1:
+Pull files from the network.
+
+Optional environment variables:
+ GNULIB_SRCDIR Specifies the local directory where gnulib
+ sources reside. Use this if you already
+ have gnulib sources on your machine, and
+ you want to use these sources.
+ GNULIB_REFDIR Specifies the local directory where a gnulib
+ repository (with a .git subdirectory) resides.
+ Use this if you already have gnulib sources
+ and history on your machine, and do not want
+ to waste your bandwidth downloading them again.
+ GNULIB_URL URL of the gnulib repository. The default is
+ $default_gnulib_url,
+ which is Gnulib's upstream repository.
+
+Options:
+
+ --bootstrap-sync If this bootstrap script is not identical to
+ the version in the local gnulib sources,
+ update this script, and then restart it with
+ /bin/sh or the shell \$CONFIG_SHELL.
+ --no-bootstrap-sync Do not check whether bootstrap is out of sync.
+
+ --force Attempt to bootstrap even if the sources seem
+ not to have been checked out.
+ --no-git Do not use git to update gnulib. Requires that
+ \$GNULIB_SRCDIR points to a gnulib repository
+ with the correct revision.
+ --skip-po Do not download *.po files.
+EOF
+ bootstrap_print_option_usage_hook
+ cat <<EOF
+If the file bootstrap.conf exists in the same directory as this script, its
+contents are read as shell variables to configure the bootstrap.
+
+For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
+are honored.
+
+Gnulib sources can be fetched in various ways:
+
+ * If the environment variable GNULIB_SRCDIR is set, then sources are
+ fetched from that local directory. If it is a git repository and the
+ configuration variable GNULIB_REVISION is set in bootstrap.conf, then
+ that revision is checked out.
+
+ * Otherwise, if this package is in a git repository with a 'gnulib'
+ submodule configured, then that submodule is initialized and updated
+ and sources are fetched from there. If the environment variable
+ GNULIB_REFDIR is set and is a git repository, then it is used as a
+ reference.
+
+ * Otherwise, if the 'gnulib' directory does not exist, Gnulib sources
+ are cloned into that directory using git from \$GNULIB_URL, defaulting
+ to $default_gnulib_url; if GNULIB_REFDIR is set and is a git repository
+ its contents may be used to accelerate the process.
+ If the configuration variable GNULIB_REVISION is set in bootstrap.conf,
+ then that revision is checked out.
+
+ * Otherwise, the existing Gnulib sources in the 'gnulib' directory are
+ used. If it is a git repository and the configuration variable
+ GNULIB_REVISION is set in bootstrap.conf, then that revision is
+ checked out.
+
+If you maintain a package and want to pin a particular revision of the
+Gnulib sources that has been tested with your package, then there are
+two possible approaches: either configure a 'gnulib' submodule with the
+appropriate revision, or set GNULIB_REVISION (and if necessary
+GNULIB_URL) in bootstrap.conf.
+
+Running without arguments will suffice in most cases.
+EOF
+}
+
+# Fetch auxiliary files that are omitted from the version control
+# repository of this package.
+autopull()
+{
+ # Ensure that CDPATH is not set. Otherwise, the output from cd
+ # would cause trouble in at least one use below.
+ (unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+ # Parse options.
+
+ # Use git to update gnulib sources
+ use_git=true
+
+ for option
+ do
+ case $option in
+ --help)
+ autopull_usage
+ return;;
+ --version)
+ set -e
+ echo "autopull.sh $scriptlibversion"
+ echo "$copyright"
+ return 0
+ ;;
+ --skip-po)
+ SKIP_PO=t;;
+ --force)
+ checkout_only_file=;;
+ --bootstrap-sync)
+ bootstrap_sync=true;;
+ --no-bootstrap-sync)
+ bootstrap_sync=false;;
+ --no-git)
+ use_git=false;;
+ *)
+ bootstrap_option_hook $option || die "$option: unknown option";;
+ esac
+ done
+
+ $use_git || test -n "$GNULIB_SRCDIR" \
+ || die "Error: --no-git requires \$GNULIB_SRCDIR environment variable" \
+ "or --gnulib-srcdir option"
+ test -z "$GNULIB_SRCDIR" || test -d "$GNULIB_SRCDIR" \
+ || die "Error: \$GNULIB_SRCDIR environment variable" \
+ "or --gnulib-srcdir option is specified," \
+ "but does not denote a directory"
+
+ if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
+ die "Running this script from a non-checked-out distribution is risky."
+ fi
+
+ check_build_prerequisites $use_git
+
+ if $use_gnulib || $bootstrap_sync; then
+ prepare_GNULIB_SRCDIR
+ if $bootstrap_sync; then
+ upgrade_bootstrap "$@"
+ fi
+ fi
+
+ # Find sha1sum, named gsha1sum on MacPorts, shasum on Mac OS X 10.6.
+ # Also find the compatible sha1 utility on the BSDs
+ if test x"$SKIP_PO" = x; then
+ find_tool SHA1SUM sha1sum gsha1sum shasum sha1
+ fi
+
+ # See if we can use gnulib's git-merge-changelog merge driver.
+ if $use_git && test -d .git && check_exists git; then
+ if git config merge.merge-changelog.driver >/dev/null ; then
+ :
+ elif check_exists git-merge-changelog; then
+ echo "$0: initializing git-merge-changelog driver"
+ git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
+ git config merge.merge-changelog.driver \
+ 'git-merge-changelog %O %A %B "%Y"'
+ else
+ echo "$0: consider installing git-merge-changelog from gnulib"
+ fi
+ fi
+
+ case $SKIP_PO in
+ '')
+ if test -d po; then
+ update_po_files po $package || return
+ fi
+
+ if test -d runtime-po; then
+ update_po_files runtime-po $package-runtime || return
+ fi;;
+ esac
+
+ # ---------------------------------------------------------------------------
+
+ bootstrap_post_pull_hook \
+ || die "bootstrap_post_pull_hook failed"
+
+ # Don't proceed if there are uninitialized submodules. In particular,
+ # autogen.sh will remove dangling links, which might be links into
+ # uninitialized submodules.
+ # But it's OK if the 'gnulib' submodule is uninitialized, as long as
+ # GNULIB_SRCDIR is set.
+ if $use_git; then
+ # Uninitialized submodules are listed with an initial dash.
+ uninitialized=`git submodule | grep '^-' | awk '{ print $2 }'`
+ if test -n "$GNULIB_SRCDIR"; then
+ uninitialized=`echo "$uninitialized" | grep -v '^gnulib$'`
+ fi
+ if test -n "$uninitialized"; then
+ uninit_comma=`echo "$uninitialized" | tr '\n' ',' | sed -e 's|,$|.|'`
+ die "Some git submodules are not initialized: "$uninit_comma \
+ "Either use option '--no-git'," \
+ "or run 'git submodule update --init' and bootstrap again."
+ fi
+ fi
+
+ if test -f "$medir"/autogen.sh; then
+ echo "$0: done. Now you can run '$medir/autogen.sh'."
+ fi
+}
+
+# ----------------------------- Get translations. -----------------------------
+
+download_po_files() {
+ subdir=$1
+ domain=$2
+ echo "$me: getting translations into $subdir for $domain..."
+ cmd=$(printf "$po_download_command_format" "$subdir" "$domain")
+ eval "$cmd"
+}
+
+# Mirror .po files to $po_dir/.reference and copy only the new
+# or modified ones into $po_dir. Also update $po_dir/LINGUAS.
+# Note po files that exist locally only are left in $po_dir but will
+# not be included in LINGUAS and hence will not be distributed.
+update_po_files() {
+ # Directory containing primary .po files.
+ # Overwrite them only when we're sure a .po file is new.
+ po_dir=$1
+ domain=$2
+
+ # Mirror *.po files into this dir.
+ # Usually contains *.s1 checksum files.
+ ref_po_dir="$po_dir/.reference"
+
+ test -d $ref_po_dir || mkdir $ref_po_dir || return
+ download_po_files $ref_po_dir $domain \
+ && ls "$ref_po_dir"/*.po 2>/dev/null |
+ sed 's|.*/||; s|\.po$||' > "$po_dir/LINGUAS" || return
+
+ for po in x $(ls $ref_po_dir | sed -n 's/\.po$//p'); do
+ case $po in x) continue;; esac
+ new_po="$ref_po_dir/$po.po"
+ cksum_file="$ref_po_dir/$po.s1"
+ if ! test -f "$cksum_file" ||
+ ! test -f "$po_dir/$po.po" ||
+ ! $SHA1SUM -c "$cksum_file" < "$new_po" > /dev/null 2>&1; then
+ echo "$me: updated $po_dir/$po.po..."
+ cp "$new_po" "$po_dir/$po.po" \
+ && $SHA1SUM < "$new_po" > "$cksum_file" || return
+ fi
+ done
+}
+
+# -------- Generate files automatically from existing sources. --------------
+
+autogen_usage() {
+ cat <<EOF
+Usage: $me [OPTION]...
+Bootstrap this package from the checked-out sources, phase 2:
+Generate files from local files (no network access).
+
+Optional environment variables:
+ GNULIB_SRCDIR Specifies the local directory where gnulib
+ sources reside. Use this if you already
+ have gnulib sources on your machine, and
+ you want to use these sources.
+
+Options:
+ --copy Copy files instead of creating symbolic links.
+ --force Attempt to bootstrap even if the sources seem
+ not to have been checked out.
+EOF
+ bootstrap_print_option_usage_hook
+ cat <<EOF
+If the file bootstrap.conf exists in the same directory as this script, its
+contents are read as shell variables to configure the bootstrap.
+
+For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
+are honored.
+
+Gnulib sources are assumed to be present:
+ * in \$GNULIB_SRCDIR, if that environment variable is set,
+ * otherwise, in the 'gnulib' submodule, if such a submodule is configured,
+ * otherwise, in the 'gnulib' subdirectory.
+
+Running without arguments will suffice in most cases.
+EOF
+}
+
+
+version_controlled_file() {
+ parent=$1
+ file=$2
+ if test -d .git; then
+ git rm -n "$file" > /dev/null 2>&1
+ elif test -d .svn; then
+ svn log -r HEAD "$file" > /dev/null 2>&1
+ elif test -d CVS; then
+ grep -F "/${file##*/}/" "$parent/CVS/Entries" 2>/dev/null |
+ grep '^/[^/]*/[0-9]' > /dev/null
+ else
+ warn_ "no version control for $file?"
+ false
+ fi
+}
+
+# Strip blank and comment lines to leave significant entries.
+gitignore_entries() {
+ sed '/^#/d; /^$/d' "$@"
+}
+
+# If $STR is not already on a line by itself in $FILE, insert it at the start.
+# Entries are inserted at the start of the ignore list to ensure existing
+# entries starting with ! are not overridden. Such entries support
+# whitelisting exceptions after a more generic blacklist pattern.
+insert_if_absent() {
+ file=$1
+ str=$2
+ test -f $file || touch $file
+ test -r $file || die "Error: failed to read ignore file: $file"
+ duplicate_entries=$(gitignore_entries $file | sort | uniq -d)
+ if [ "$duplicate_entries" ] ; then
+ die "Error: Duplicate entries in $file: " $duplicate_entries
+ fi
+ linesold=$(gitignore_entries $file | wc -l)
+ linesnew=$( { echo "$str"; cat $file; } | gitignore_entries | sort -u | wc -l)
+ if [ $linesold != $linesnew ] ; then
+ { echo "$str" | cat - $file > $file.bak && mv $file.bak $file; } \
+ || die "insert_if_absent $file $str: failed"
+ fi
+}
+
+# Adjust $PATTERN for $VC_IGNORE_FILE and insert it with
+# insert_if_absent.
+insert_vc_ignore() {
+ vc_ignore_file="$1"
+ pattern="$2"
+ case $vc_ignore_file in
+ *.gitignore)
+ # A .gitignore entry that does not start with '/' applies
+ # recursively to subdirectories, so prepend '/' to every
+ # .gitignore entry.
+ pattern=$(echo "$pattern" | sed s,^,/,);;
+ esac
+ insert_if_absent "$vc_ignore_file" "$pattern"
+}
+
+symlink_to_dir()
+{
+ src=$1/$2
+ dst=${3-$2}
+
+ test -f "$src" && {
+
+ # If the destination directory doesn't exist, create it.
+ # This is required at least for "lib/uniwidth/cjk.h".
+ dst_dir=$(dirname "$dst")
+ if ! test -d "$dst_dir"; then
+ mkdir -p "$dst_dir"
+
+ # If we've just created a directory like lib/uniwidth,
+ # tell version control system(s) it's ignorable.
+ # FIXME: for now, this does only one level
+ parent=$(dirname "$dst_dir")
+ for dot_ig in x $vc_ignore; do
+ test $dot_ig = x && continue
+ ig=$parent/$dot_ig
+ insert_vc_ignore $ig "${dst_dir##*/}/"
+ done
+ fi
+
+ if $copy; then
+ {
+ test ! -h "$dst" || {
+ echo "$me: rm -f $dst" &&
+ rm -f "$dst"
+ }
+ } &&
+ test -f "$dst" &&
+ cmp -s "$src" "$dst" || {
+ echo "$me: cp -fp $src $dst" &&
+ cp -fp "$src" "$dst"
+ }
+ else
+ # Leave any existing symlink alone, if it already points to the source,
+ # so that broken build tools that care about symlink times
+ # aren't confused into doing unnecessary builds. Conversely, if the
+ # existing symlink's timestamp is older than the source, make it afresh,
+ # so that broken tools aren't confused into skipping needed builds. See
+ # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
+ test -h "$dst" &&
+ src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
+ dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
+ test "$src_i" = "$dst_i" &&
+ both_ls=$(ls -dt "$src" "$dst") &&
+ test "X$both_ls" = "X$dst$nl$src" || {
+ dot_dots=
+ case $src in
+ /*) ;;
+ *)
+ case /$dst/ in
+ *//* | */../* | */./* | /*/*/*/*/*/)
+ die "invalid symlink calculation: $src -> $dst";;
+ /*/*/*/*/) dot_dots=../../../;;
+ /*/*/*/) dot_dots=../../;;
+ /*/*/) dot_dots=../;;
+ esac;;
+ esac
+
+ echo "$me: ln -fs $dot_dots$src $dst" &&
+ ln -fs "$dot_dots$src" "$dst"
+ }
+ fi
+ }
+}
+
+# Regenerate all autogeneratable files that are omitted from the
+# version control repository. In particular, regenerate all
+# aclocal.m4, config.h.in, Makefile.in, configure files with new
+# versions of autoconf or automake.
+autogen()
+{
+ # Ensure that CDPATH is not set. Otherwise, the output from cd
+ # would cause trouble in at least one use below.
+ (unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
+ # Environment variables that may be set by the user.
+ : "${AUTOPOINT=autopoint}"
+ : "${AUTORECONF=autoreconf}"
+
+ if test "$vc_ignore" = auto; then
+ vc_ignore=
+ test -d .git && vc_ignore=.gitignore
+ test -d CVS && vc_ignore="$vc_ignore .cvsignore"
+ fi
+
+
+ # Parse options.
+
+ # Whether to use copies instead of symlinks.
+ copy=false
+
+ for option
+ do
+ case $option in
+ --help)
+ autogen_usage
+ return;;
+ --version)
+ set -e
+ echo "autogen.sh $scriptlibversion"
+ echo "$copyright"
+ return 0
+ ;;
+ --force)
+ checkout_only_file=;;
+ --copy)
+ copy=true;;
+ *)
+ bootstrap_option_hook $option || die "$option: unknown option";;
+ esac
+ done
+
+ test -z "$GNULIB_SRCDIR" || test -d "$GNULIB_SRCDIR" \
+ || die "Error: \$GNULIB_SRCDIR environment variable or --gnulib-srcdir" \
+ "option is specified, but does not denote a directory"
+
+ if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
+ die "Running this script from a non-checked-out distribution is risky."
+ fi
+
+ if $use_gnulib; then
+ if test -z "$GNULIB_SRCDIR"; then
+ gnulib_path=$(test -f .gitmodules &&
+ git config --file .gitmodules submodule.gnulib.path)
+ test -z "$gnulib_path" && gnulib_path=gnulib
+ GNULIB_SRCDIR=$gnulib_path
+ fi
+ fi
+
+ # Die if there is no AC_CONFIG_AUX_DIR($build_aux) line in configure.ac.
+ found_aux_dir=no
+ grep '^[ ]*AC_CONFIG_AUX_DIR(\['"$build_aux"'])' configure.ac \
+ >/dev/null && found_aux_dir=yes
+ grep '^[ ]*AC_CONFIG_AUX_DIR('"$build_aux"')' configure.ac \
+ >/dev/null && found_aux_dir=yes
+ test $found_aux_dir = yes \
+ || die "configure.ac lacks 'AC_CONFIG_AUX_DIR([$build_aux])'; add it"
+
+ # If $build_aux doesn't exist, create it now, otherwise some bits
+ # below will malfunction. If creating it, also mark it as ignored.
+ if test ! -d $build_aux; then
+ mkdir $build_aux
+ for dot_ig in x $vc_ignore; do
+ test $dot_ig = x && continue
+ insert_vc_ignore $dot_ig $build_aux/
+ done
+ fi
+
+ check_build_prerequisites false
+
+ use_libtool=0
+ # We'd like to use grep -E, to see if any of LT_INIT,
+ # AC_PROG_LIBTOOL, AM_PROG_LIBTOOL is used in configure.ac,
+ # but that's not portable enough (e.g., for Solaris).
+ grep '^[ ]*A[CM]_PROG_LIBTOOL' configure.ac >/dev/null \
+ && use_libtool=1
+ grep '^[ ]*LT_INIT' configure.ac >/dev/null \
+ && use_libtool=1
+ if test $use_libtool = 1; then
+ find_tool LIBTOOLIZE glibtoolize libtoolize
+ fi
+
+ if $use_gnulib; then
+ gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
+ <$gnulib_tool || return
+ fi
+
+ # NOTE: we have to be careful to run both autopoint and libtoolize
+ # before gnulib-tool, since gnulib-tool is likely to provide newer
+ # versions of files "installed" by these two programs.
+ # Then, *after* gnulib-tool (see below), we have to be careful to
+ # run autoreconf in such a way that it does not run either of these
+ # two just-pre-run programs.
+
+ # Import from gettext.
+ with_gettext=yes
+ grep '^[ ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null || \
+ with_gettext=no
+
+ if test $with_gettext = yes || test $use_libtool = 1; then
+
+ tempbase=.bootstrap$$
+ trap "rm -f $tempbase.0 $tempbase.1" HUP INT PIPE TERM
+
+ > $tempbase.0 > $tempbase.1 &&
+ find . ! -type d -print | sort > $tempbase.0 || return
+
+ if test $with_gettext = yes; then
+ # Released autopoint has the tendency to install macros that have been
+ # obsoleted in current gnulib, so run this before gnulib-tool.
+ echo "$0: $AUTOPOINT --force"
+ $AUTOPOINT --force || return
+ fi
+
+ # Autoreconf runs aclocal before libtoolize, which causes spurious
+ # warnings if the initial aclocal is confused by the libtoolized
+ # (or worse out-of-date) macro directory.
+ # libtoolize 1.9b added the --install option; but we support back
+ # to libtoolize 1.5.22, where the install action was default.
+ if test $use_libtool = 1; then
+ install=
+ case $($LIBTOOLIZE --help) in
+ *--install*) install=--install ;;
+ esac
+ echo "running: $LIBTOOLIZE $install --copy"
+ $LIBTOOLIZE $install --copy
+ fi
+
+ find . ! -type d -print | sort >$tempbase.1
+ old_IFS=$IFS
+ IFS=$nl
+ for file in $(comm -13 $tempbase.0 $tempbase.1); do
+ IFS=$old_IFS
+ parent=${file%/*}
+ version_controlled_file "$parent" "$file" || {
+ for dot_ig in x $vc_ignore; do
+ test $dot_ig = x && continue
+ ig=$parent/$dot_ig
+ insert_vc_ignore "$ig" "${file##*/}"
+ done
+ }
+ done
+ IFS=$old_IFS
+
+ rm -f $tempbase.0 $tempbase.1
+ trap - HUP INT PIPE TERM
+ fi
+
+ # Import from gnulib.
+
+ if $use_gnulib; then
+ gnulib_tool_options="\
+ --no-changelog\
+ --aux-dir=$build_aux\
+ --doc-base=$doc_base\
+ --lib=$gnulib_name\
+ --m4-base=$m4_base/\
+ --source-base=$source_base/\
+ --tests-base=$tests_base\
+ --local-dir=$local_gl_dir\
+ $gnulib_tool_option_extras\
+ "
+ if test $use_libtool = 1; then
+ case "$gnulib_tool_options " in
+ *' --libtool '*) ;;
+ *) gnulib_tool_options="$gnulib_tool_options --libtool" ;;
+ esac
+ fi
+ echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
+ $gnulib_tool $gnulib_tool_options --import $gnulib_modules \
+ || die "gnulib-tool failed"
+
+ if test $with_gettext = yes && test ! -f $m4_base/gettext.m4; then
+ # The gnulib-tool invocation has removed $m4_base/gettext.m4, that the
+ # AUTOPOINT invocation had installed. This can occur when the gnulib
+ # module 'gettext' was previously present but is now not present any more.
+ # Repeat the AUTOPOINT invocation and the gnulib-tool invocation.
+
+ echo "$0: $AUTOPOINT --force"
+ $AUTOPOINT --force || return
+
+ echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
+ $gnulib_tool $gnulib_tool_options --import $gnulib_modules \
+ || die "gnulib-tool failed"
+ fi
+
+ for file in $gnulib_files; do
+ symlink_to_dir "$GNULIB_SRCDIR" $file \
+ || die "failed to symlink $file"
+ done
+ fi
+
+ bootstrap_post_import_hook \
+ || die "bootstrap_post_import_hook failed"
+
+ # Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
+ # gnulib-populated directories. Such .m4 files would cause aclocal to fail.
+ # The following requires GNU find 4.2.3 or newer. Considering the usual
+ # portability constraints of this script, that may seem a very demanding
+ # requirement, but it should be ok. Ignore any failure, which is fine,
+ # since this is only a convenience to help developers avoid the relatively
+ # unusual case in which a symlinked-to .m4 file is git-removed from gnulib
+ # between successive runs of this script.
+ find "$m4_base" "$source_base" \
+ -depth \( -name '*.m4' -o -name '*.[ch]' \) \
+ -type l -xtype l -delete > /dev/null 2>&1
+
+ # Invoke autoreconf with --force --install to ensure upgrades of tools
+ # such as ylwrap.
+ AUTORECONFFLAGS="--verbose --install --force $ACLOCAL_FLAGS"
+ AUTORECONFFLAGS="$AUTORECONFFLAGS --no-recursive"
+
+ # Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
+ echo "running: AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS"
+ AUTOPOINT=true LIBTOOLIZE=true $AUTORECONF $AUTORECONFFLAGS \
+ || die "autoreconf failed"
+
+ # Get some extra files from gnulib, overriding existing files.
+ for file in $gnulib_extra_files; do
+ case $file in
+ */INSTALL) dst=INSTALL;;
+ build-aux/*) dst=$build_aux/${file#build-aux/};;
+ *) dst=$file;;
+ esac
+ symlink_to_dir "$GNULIB_SRCDIR" $file $dst \
+ || die "failed to symlink $file"
+ done
+
+ if test $with_gettext = yes; then
+ # Create gettext configuration.
+ echo "$0: Creating po/Makevars from po/Makevars.template ..."
+ rm -f po/Makevars
+ sed '
+ /^EXTRA_LOCALE_CATEGORIES *=/s/=.*/= '"$EXTRA_LOCALE_CATEGORIES"'/
+ /^COPYRIGHT_HOLDER *=/s/=.*/= '"$COPYRIGHT_HOLDER"'/
+ /^MSGID_BUGS_ADDRESS *=/s|=.*|= '"$MSGID_BUGS_ADDRESS"'|
+ /^XGETTEXT_OPTIONS *=/{
+ s/$/ \\/
+ a\
+ '"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
+ }
+ ' po/Makevars.template >po/Makevars \
+ || die 'cannot generate po/Makevars'
+
+ # If the 'gettext' module is in use, grab the latest Makefile.in.in.
+ # If only the 'gettext-h' module is in use, assume autopoint already
+ # put the correct version of this file into place.
+ case $gnulib_modules in
+ *gettext-h*) ;;
+ *gettext*)
+ cp $GNULIB_SRCDIR/build-aux/po/Makefile.in.in po/Makefile.in.in \
+ || die "cannot create po/Makefile.in.in"
+ ;;
+ esac
+
+ if test -d runtime-po; then
+ # Similarly for runtime-po/Makevars, but not quite the same.
+ rm -f runtime-po/Makevars
+ sed '
+ /^DOMAIN *=.*/s/=.*/= '"$package"'-runtime/
+ /^subdir *=.*/s/=.*/= runtime-po/
+ /^MSGID_BUGS_ADDRESS *=/s/=.*/= bug-'"$package"'@gnu.org/
+ /^XGETTEXT_OPTIONS *=/{
+ s/$/ \\/
+ a\
+ '"$XGETTEXT_OPTIONS_RUNTIME"' $${end_of_xgettext_options+}
+ }
+ ' po/Makevars.template >runtime-po/Makevars \
+ || die 'cannot generate runtime-po/Makevars'
+
+ # Copy identical files from po to runtime-po.
+ cp -p po/Makefile.in.in po/*-quot po/*.header po/*.sed po/*.sin runtime-po
+ fi
+ fi
+
+ bootstrap_epilogue
+
+ echo "$0: done. Now you can run './configure'."
+}
+
+# ----------------------------------------------------------------------------
+
+# Local Variables:
+# eval: (add-hook 'before-save-hook 'time-stamp nil t)
+# time-stamp-start: "scriptlibversion="
+# time-stamp-format: "%Y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
+
+usage() {
+ cat <<EOF
+Usage: $me [OPTION]...
+Bootstrap this package from the checked-out sources.
+
+Optional environment variables:
+ GNULIB_SRCDIR Specifies the local directory where gnulib
+ sources reside. Use this if you already
+ have gnulib sources on your machine, and
+ you want to use these sources.
+ GNULIB_REFDIR Specifies the local directory where a gnulib
+ repository (with a .git subdirectory) resides.
+ Use this if you already have gnulib sources
+ and history on your machine, and do not want
+ to waste your bandwidth downloading them again.
+ Only used for phase 1 (--pull).
+ GNULIB_URL URL of the gnulib repository. The default is
+ $default_gnulib_url,
+ which is Gnulib's upstream repository.
+ Only used for phase 1 (--pull).
+
+Options:
+
+ --pull Do phase 1: Pull files from the network.
+ --gen Do phase 2: Generate files from local files
+ (no network access).
+ (The default is to do both phases.)
+
+ --gnulib-srcdir=DIRNAME Specifies the local directory where gnulib
+ sources reside. Use this if you already
+ have gnulib sources on your machine, and
+ you want to use these sources. Defaults
+ to \$GNULIB_SRCDIR.
+ --gnulib-refdir=DIRNAME Specifies the local directory where a gnulib
+ repository (with a .git subdirectory) resides.
+ Use this if you already have gnulib sources
+ and history on your machine, and do not want
+ to waste your bandwidth downloading them again.
+ Defaults to \$GNULIB_REFDIR.
+ Only used for phase 1 (--pull).
+
+ --bootstrap-sync If this bootstrap script is not identical to
+ the version in the local gnulib sources,
+ update this script, and then restart it with
+ /bin/sh or the shell \$CONFIG_SHELL.
+ --no-bootstrap-sync Do not check whether bootstrap is out of sync.
+
+ --copy Copy files instead of creating symbolic links.
+ Only used for phase 2 (--gen).
+ --force Attempt to bootstrap even if the sources seem
+ not to have been checked out.
+ --no-git Do not use git to update gnulib. Requires that
+ \$GNULIB_SRCDIR or the --gnulib-srcdir option
+ points to a gnulib repository with the correct
+ revision.
+ Only used for phase 1 (--pull).
+ --skip-po Do not download *.po files.
+ Only used for phase 1 (--pull).
+EOF
+ bootstrap_print_option_usage_hook
+ cat <<EOF
+If the file bootstrap.conf exists in the same directory as this script, its
+contents are read as shell variables to configure the bootstrap.
+
+For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
+are honored.
+
+Gnulib sources can be fetched in various ways:
+
+ * If GNULIB_SRCDIR is set (either as an environment variable or via the
+ --gnulib-srcdir option), then sources are fetched from that local
+ directory. If it is a git repository and the configuration variable
+ GNULIB_REVISION is set in bootstrap.conf, then that revision is
+ checked out.
+
+ * Otherwise, if this package is in a git repository with a 'gnulib'
+ submodule configured, then that submodule is initialized and updated
+ and sources are fetched from there. If GNULIB_REFDIR is set (either
+ as an environment variable or via the --gnulib-refdir option) and is
+ a git repository, then it is used as a reference.
+
+ * Otherwise, if the 'gnulib' directory does not exist, Gnulib sources
+ are cloned into that directory using git from \$GNULIB_URL, defaulting
+ to $default_gnulib_url; if GNULIB_REFDIR is set and is a git repository
+ its contents may be used to accelerate the process.
+ If the configuration variable GNULIB_REVISION is set in bootstrap.conf,
+ then that revision is checked out.
+
+ * Otherwise, the existing Gnulib sources in the 'gnulib' directory are
+ used. If it is a git repository and the configuration variable
+ GNULIB_REVISION is set in bootstrap.conf, then that revision is
+ checked out.
+
+If you maintain a package and want to pin a particular revision of the
+Gnulib sources that has been tested with your package, then there are
+two possible approaches: either configure a 'gnulib' submodule with the
+appropriate revision, or set GNULIB_REVISION (and if necessary
+GNULIB_URL) in bootstrap.conf.
+
+Running without arguments will suffice in most cases.
+EOF
+}
+
+# Parse options.
+
+# Whether to pull and generate.
+pull=false
+gen=false
+
+# Whether to use copies instead of symlinks.
+copy=false
+
+# Use git to update gnulib sources
+use_git=true
+
+for option
+do
+ case $option in
+ --help)
+ usage
+ exit;;
+ --version)
+ set -e
+ echo "bootstrap $scriptversion lib $scriptlibversion"
+ echo "$copyright"
+ exit 0
+ ;;
+ --pull)
+ pull=true;;
+ --gen)
+ gen=true;;
+ --gnulib-srcdir=*)
+ GNULIB_SRCDIR=${option#--gnulib-srcdir=};;
+ --gnulib-refdir=*)
+ GNULIB_REFDIR=${option#--gnulib-refdir=};;
+ --skip-po)
+ SKIP_PO=t;;
+ --force)
+ checkout_only_file=;;
+ --copy)
+ copy=true;;
+ --bootstrap-sync)
+ bootstrap_sync=true;;
+ --no-bootstrap-sync)
+ bootstrap_sync=false;;
+ --no-git)
+ use_git=false;;
+ *)
+ bootstrap_option_hook $option || die "$option: unknown option";;
+ esac
+done
+
+# Default is to do both.
+$pull || $gen || pull=true gen=true
+
+$use_git || test -n "$GNULIB_SRCDIR" \
+ || die "Error: --no-git requires \$GNULIB_SRCDIR environment variable" \
+ "or --gnulib-srcdir option"
+test -z "$GNULIB_SRCDIR" || test -d "$GNULIB_SRCDIR" \
+ || die "Error: \$GNULIB_SRCDIR environment variable or --gnulib-srcdir" \
+ "option is specified, but does not denote a directory"
+
+if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
+ die "Bootstrapping from a non-checked-out distribution is risky."
+fi
+
+check_build_prerequisites $use_git
+
+if $bootstrap_sync; then
+ prepare_GNULIB_SRCDIR
+ upgrade_bootstrap "$@"
+ # Since we have now upgraded if needed, no need to try it a second time below.
+ bootstrap_sync=false
+fi
+
+echo "$0: Bootstrapping from checked-out $package sources..."
+
+# Pass GNULIB_SRCDIR and GNULIB_REFDIR to any subsidiary commands that care.
+export GNULIB_SRCDIR
+export GNULIB_REFDIR
+
+if $pull && { $use_git || test -z "$SKIP_PO"; }; then
+ autopull \
+ `if $bootstrap_sync; then
+ echo ' --bootstrap-sync'
+ else
+ echo ' --no-bootstrap-sync'
+ fi` \
+ `if test -z "$checkout_only_file"; then echo ' --force'; fi` \
+ `if ! $use_git; then echo ' --no-git'; fi` \
+ `if test -n "$SKIP_PO"; then echo ' --skip-po'; fi` \
+ || die "could not fetch auxiliary files"
+fi
+
+if $gen; then
+ autogen \
+ `if $copy; then echo ' --copy'; fi` \
+ `if test -z "$checkout_only_file"; then echo ' --force'; fi` \
+ || die "could not generate auxiliary files"
+fi
+
+# ----------------------------------------------------------------------------
+
+# Local Variables:
+# eval: (add-hook 'before-save-hook 'time-stamp nil t)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%Y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC0"
+# time-stamp-end: "; # UTC"
+# End:
diff --git a/bootstrap.conf b/bootstrap.conf
new file mode 100644
index 0000000..6c7a1a1
--- /dev/null
+++ b/bootstrap.conf
@@ -0,0 +1,3 @@
+gnulib_modules="git-version-gen gitlog-to-changelog gendocs"
+gnulib_name="libgnu"
+source_base="gnu" \ No newline at end of file
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..2bb4b99
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,40 @@
+AC_INIT([aplwc], [0.1], [peter@pmikkelsen.com], [aplwc], [aplwc.org])
+AC_CONFIG_SRCDIR([src/main.c])
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIRS([m4])
+AC_CONFIG_TESTDIR([tests])
+AC_PREREQ([2.71])
+
+VERSION_NUMBER=`cd $srcdir && build-aux/git-version-gen .tarball-version`
+gl_INIT_PACKAGE_VERSION([$VERSION_NUMBER])
+AM_INIT_AUTOMAKE([gnu check-news std-options -Wall -Werror])
+AM_SILENT_RULES([yes])
+
+AC_PROG_CC
+gl_EARLY
+gl_INIT
+
+AM_PROG_AR
+LT_INIT
+PKG_INSTALLDIR
+
+AM_GNU_GETTEXT([external])
+AM_GNU_GETTEXT_VERSION(0.20)
+
+PKG_CHECK_MODULES([READLINE], [readline])
+
+AC_CONFIG_FILES([
+ Makefile
+ src/Makefile
+ lib/Makefile
+ doc/Makefile
+ gnu/Makefile
+ po/Makefile.in
+ tests/Makefile
+ tests/package.m4
+ tests/atlocal
+ guix.scm
+ lib/aplwc.pc
+])
+AC_OUTPUT
diff --git a/doc/.gitignore b/doc/.gitignore
new file mode 100644
index 0000000..ffe3aa9
--- /dev/null
+++ b/doc/.gitignore
@@ -0,0 +1,11 @@
+/gendocs_template_min
+/gendocs_template
+/manual
+/version.texi
+/aplwc.aux
+/aplwc.fls
+/aplwc.info
+/aplwc.log
+/aplwc.tmp
+/aplwc.toc
+/stamp-vti \ No newline at end of file
diff --git a/doc/Makefile.am b/doc/Makefile.am
new file mode 100644
index 0000000..143cba9
--- /dev/null
+++ b/doc/Makefile.am
@@ -0,0 +1,12 @@
+info_TEXINFOS = aplwc.texi
+
+aplwc_TEXINFOS = fdl.texi
+
+clean-local:
+ rm -rf manual
+
+manual: index_template.html
+ cp index_template.html gendocs_template
+ $(top_srcdir)/build-aux/gendocs.sh -I $(top_srcdir)/build-aux/ aplwc "Aplwc manual"
+
+manual-rebuild: clean-local manual
diff --git a/doc/aplwc.texi b/doc/aplwc.texi
new file mode 100644
index 0000000..8734d87
--- /dev/null
+++ b/doc/aplwc.texi
@@ -0,0 +1,85 @@
+\input texinfo
+@setfilename aplwc.info
+@include version.texi
+@settitle @command{aplwc} @value{VERSION}
+@setchapternewpage odd
+
+@copying
+This manual is for @command{aplwc} (version @value{VERSION}, @value{UPDATED}).
+
+Copyright @copyright{} 2026 Peter Mikkelsen.
+
+@quotation
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3
+or any later version published by the Free Software Foundation;
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+A copy of the license is included in the section entitled "GNU
+Free Documentation License".
+@end quotation
+@end copying
+
+@dircategory Software development
+@direntry
+* Aplwc: (aplwc). A Programming Language With Constraints
+@end direntry
+
+@titlepage
+@title @command{aplwc}: A Programming Language With Constraints
+@subtitle @value{VERSION}, @value{UPDATED}
+@author Peter Mikkelsen
+@end titlepage
+
+@node Top
+@top @command{aplwc}: A Programming Language With Constraints
+@insertcopying
+
+This document describes @command{aplwc}.
+
+@menu
+* Introduction::
+* Tutorial::
+* @command{aplwc} invocation::
+
+Appendices
+
+* Changes since previous release::
+* GNU Free Documentation License::
+
+@detailmenu
+
+Introduction
+
+* Contents:: What this document contains
+
+@end detailmenu
+@end menu
+
+@node Introduction
+@chapter Introduction
+
+Intro chapter
+
+@node Contents
+@section What this document contains
+
+@node Tutorial
+@chapter Tutorial
+
+Tutorial goes here
+
+@node @command{aplwc} invocation
+@chapter @command{aplwc} invocation
+
+just run it
+
+@node Changes since previous release
+@chapter Changes since previous release
+
+@node GNU Free Documentation License
+@appendix GNU Free Documentation License
+@include fdl.texi
+
+@summarycontents
+@contents
+@bye
diff --git a/doc/fdl.texi b/doc/fdl.texi
new file mode 100644
index 0000000..eaf3da0
--- /dev/null
+++ b/doc/fdl.texi
@@ -0,0 +1,505 @@
+@c The GNU Free Documentation License.
+@center Version 1.3, 3 November 2008
+
+@c This file is intended to be included within another document,
+@c hence no sectioning command or @node.
+
+@display
+Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+@uref{https://fsf.org/}
+
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+@end display
+
+@enumerate 0
+@item
+PREAMBLE
+
+The purpose of this License is to make a manual, textbook, or other
+functional and useful document @dfn{free} in the sense of freedom: to
+assure everyone the effective freedom to copy and redistribute it,
+with or without modifying it, either commercially or noncommercially.
+Secondarily, this License preserves for the author and publisher a way
+to get credit for their work, while not being considered responsible
+for modifications made by others.
+
+This License is a kind of ``copyleft'', which means that derivative
+works of the document must themselves be free in the same sense. It
+complements the GNU General Public License, which is a copyleft
+license designed for free software.
+
+We have designed this License in order to use it for manuals for free
+software, because free software needs free documentation: a free
+program should come with manuals providing the same freedoms that the
+software does. But this License is not limited to software manuals;
+it can be used for any textual work, regardless of subject matter or
+whether it is published as a printed book. We recommend this License
+principally for works whose purpose is instruction or reference.
+
+@item
+APPLICABILITY AND DEFINITIONS
+
+This License applies to any manual or other work, in any medium, that
+contains a notice placed by the copyright holder saying it can be
+distributed under the terms of this License. Such a notice grants a
+world-wide, royalty-free license, unlimited in duration, to use that
+work under the conditions stated herein. The ``Document'', below,
+refers to any such manual or work. Any member of the public is a
+licensee, and is addressed as ``you''. You accept the license if you
+copy, modify or distribute the work in a way requiring permission
+under copyright law.
+
+A ``Modified Version'' of the Document means any work containing the
+Document or a portion of it, either copied verbatim, or with
+modifications and/or translated into another language.
+
+A ``Secondary Section'' is a named appendix or a front-matter section
+of the Document that deals exclusively with the relationship of the
+publishers or authors of the Document to the Document's overall
+subject (or to related matters) and contains nothing that could fall
+directly within that overall subject. (Thus, if the Document is in
+part a textbook of mathematics, a Secondary Section may not explain
+any mathematics.) The relationship could be a matter of historical
+connection with the subject or with related matters, or of legal,
+commercial, philosophical, ethical or political position regarding
+them.
+
+The ``Invariant Sections'' are certain Secondary Sections whose titles
+are designated, as being those of Invariant Sections, in the notice
+that says that the Document is released under this License. If a
+section does not fit the above definition of Secondary then it is not
+allowed to be designated as Invariant. The Document may contain zero
+Invariant Sections. If the Document does not identify any Invariant
+Sections then there are none.
+
+The ``Cover Texts'' are certain short passages of text that are listed,
+as Front-Cover Texts or Back-Cover Texts, in the notice that says that
+the Document is released under this License. A Front-Cover Text may
+be at most 5 words, and a Back-Cover Text may be at most 25 words.
+
+A ``Transparent'' copy of the Document means a machine-readable copy,
+represented in a format whose specification is available to the
+general public, that is suitable for revising the document
+straightforwardly with generic text editors or (for images composed of
+pixels) generic paint programs or (for drawings) some widely available
+drawing editor, and that is suitable for input to text formatters or
+for automatic translation to a variety of formats suitable for input
+to text formatters. A copy made in an otherwise Transparent file
+format whose markup, or absence of markup, has been arranged to thwart
+or discourage subsequent modification by readers is not Transparent.
+An image format is not Transparent if used for any substantial amount
+of text. A copy that is not ``Transparent'' is called ``Opaque''.
+
+Examples of suitable formats for Transparent copies include plain
+ASCII without markup, Texinfo input format, La@TeX{} input
+format, SGML or XML using a publicly available
+DTD, and standard-conforming simple HTML,
+PostScript or PDF designed for human modification. Examples
+of transparent image formats include PNG, XCF and
+JPG@. Opaque formats include proprietary formats that can be
+read and edited only by proprietary word processors, SGML or
+XML for which the DTD and/or processing tools are
+not generally available, and the machine-generated HTML,
+PostScript or PDF produced by some word processors for
+output purposes only.
+
+The ``Title Page'' means, for a printed book, the title page itself,
+plus such following pages as are needed to hold, legibly, the material
+this License requires to appear in the title page. For works in
+formats which do not have any title page as such, ``Title Page'' means
+the text near the most prominent appearance of the work's title,
+preceding the beginning of the body of the text.
+
+The ``publisher'' means any person or entity that distributes copies
+of the Document to the public.
+
+A section ``Entitled XYZ'' means a named subunit of the Document whose
+title either is precisely XYZ or contains XYZ in parentheses following
+text that translates XYZ in another language. (Here XYZ stands for a
+specific section name mentioned below, such as ``Acknowledgements'',
+``Dedications'', ``Endorsements'', or ``History''.) To ``Preserve the Title''
+of such a section when you modify the Document means that it remains a
+section ``Entitled XYZ'' according to this definition.
+
+The Document may include Warranty Disclaimers next to the notice which
+states that this License applies to the Document. These Warranty
+Disclaimers are considered to be included by reference in this
+License, but only as regards disclaiming warranties: any other
+implication that these Warranty Disclaimers may have is void and has
+no effect on the meaning of this License.
+
+@item
+VERBATIM COPYING
+
+You may copy and distribute the Document in any medium, either
+commercially or noncommercially, provided that this License, the
+copyright notices, and the license notice saying this License applies
+to the Document are reproduced in all copies, and that you add no other
+conditions whatsoever to those of this License. You may not use
+technical measures to obstruct or control the reading or further
+copying of the copies you make or distribute. However, you may accept
+compensation in exchange for copies. If you distribute a large enough
+number of copies you must also follow the conditions in section 3.
+
+You may also lend copies, under the same conditions stated above, and
+you may publicly display copies.
+
+@item
+COPYING IN QUANTITY
+
+If you publish printed copies (or copies in media that commonly have
+printed covers) of the Document, numbering more than 100, and the
+Document's license notice requires Cover Texts, you must enclose the
+copies in covers that carry, clearly and legibly, all these Cover
+Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
+the back cover. Both covers must also clearly and legibly identify
+you as the publisher of these copies. The front cover must present
+the full title with all words of the title equally prominent and
+visible. You may add other material on the covers in addition.
+Copying with changes limited to the covers, as long as they preserve
+the title of the Document and satisfy these conditions, can be treated
+as verbatim copying in other respects.
+
+If the required texts for either cover are too voluminous to fit
+legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto adjacent
+pages.
+
+If you publish or distribute Opaque copies of the Document numbering
+more than 100, you must either include a machine-readable Transparent
+copy along with each Opaque copy, or state in or with each Opaque copy
+a computer-network location from which the general network-using
+public has access to download using public-standard network protocols
+a complete Transparent copy of the Document, free of added material.
+If you use the latter option, you must take reasonably prudent steps,
+when you begin distribution of Opaque copies in quantity, to ensure
+that this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you distribute an
+Opaque copy (directly or through your agents or retailers) of that
+edition to the public.
+
+It is requested, but not required, that you contact the authors of the
+Document well before redistributing any large number of copies, to give
+them a chance to provide you with an updated version of the Document.
+
+@item
+MODIFICATIONS
+
+You may copy and distribute a Modified Version of the Document under
+the conditions of sections 2 and 3 above, provided that you release
+the Modified Version under precisely this License, with the Modified
+Version filling the role of the Document, thus licensing distribution
+and modification of the Modified Version to whoever possesses a copy
+of it. In addition, you must do these things in the Modified Version:
+
+@enumerate A
+@item
+Use in the Title Page (and on the covers, if any) a title distinct
+from that of the Document, and from those of previous versions
+(which should, if there were any, be listed in the History section
+of the Document). You may use the same title as a previous version
+if the original publisher of that version gives permission.
+
+@item
+List on the Title Page, as authors, one or more persons or entities
+responsible for authorship of the modifications in the Modified
+Version, together with at least five of the principal authors of the
+Document (all of its principal authors, if it has fewer than five),
+unless they release you from this requirement.
+
+@item
+State on the Title page the name of the publisher of the
+Modified Version, as the publisher.
+
+@item
+Preserve all the copyright notices of the Document.
+
+@item
+Add an appropriate copyright notice for your modifications
+adjacent to the other copyright notices.
+
+@item
+Include, immediately after the copyright notices, a license notice
+giving the public permission to use the Modified Version under the
+terms of this License, in the form shown in the Addendum below.
+
+@item
+Preserve in that license notice the full lists of Invariant Sections
+and required Cover Texts given in the Document's license notice.
+
+@item
+Include an unaltered copy of this License.
+
+@item
+Preserve the section Entitled ``History'', Preserve its Title, and add
+to it an item stating at least the title, year, new authors, and
+publisher of the Modified Version as given on the Title Page. If
+there is no section Entitled ``History'' in the Document, create one
+stating the title, year, authors, and publisher of the Document as
+given on its Title Page, then add an item describing the Modified
+Version as stated in the previous sentence.
+
+@item
+Preserve the network location, if any, given in the Document for
+public access to a Transparent copy of the Document, and likewise
+the network locations given in the Document for previous versions
+it was based on. These may be placed in the ``History'' section.
+You may omit a network location for a work that was published at
+least four years before the Document itself, or if the original
+publisher of the version it refers to gives permission.
+
+@item
+For any section Entitled ``Acknowledgements'' or ``Dedications'', Preserve
+the Title of the section, and preserve in the section all the
+substance and tone of each of the contributor acknowledgements and/or
+dedications given therein.
+
+@item
+Preserve all the Invariant Sections of the Document,
+unaltered in their text and in their titles. Section numbers
+or the equivalent are not considered part of the section titles.
+
+@item
+Delete any section Entitled ``Endorsements''. Such a section
+may not be included in the Modified Version.
+
+@item
+Do not retitle any existing section to be Entitled ``Endorsements'' or
+to conflict in title with any Invariant Section.
+
+@item
+Preserve any Warranty Disclaimers.
+@end enumerate
+
+If the Modified Version includes new front-matter sections or
+appendices that qualify as Secondary Sections and contain no material
+copied from the Document, you may at your option designate some or all
+of these sections as invariant. To do this, add their titles to the
+list of Invariant Sections in the Modified Version's license notice.
+These titles must be distinct from any other section titles.
+
+You may add a section Entitled ``Endorsements'', provided it contains
+nothing but endorsements of your Modified Version by various
+parties---for example, statements of peer review or that the text has
+been approved by an organization as the authoritative definition of a
+standard.
+
+You may add a passage of up to five words as a Front-Cover Text, and a
+passage of up to 25 words as a Back-Cover Text, to the end of the list
+of Cover Texts in the Modified Version. Only one passage of
+Front-Cover Text and one of Back-Cover Text may be added by (or
+through arrangements made by) any one entity. If the Document already
+includes a cover text for the same cover, previously added by you or
+by arrangement made by the same entity you are acting on behalf of,
+you may not add another; but you may replace the old one, on explicit
+permission from the previous publisher that added the old one.
+
+The author(s) and publisher(s) of the Document do not by this License
+give permission to use their names for publicity for or to assert or
+imply endorsement of any Modified Version.
+
+@item
+COMBINING DOCUMENTS
+
+You may combine the Document with other documents released under this
+License, under the terms defined in section 4 above for modified
+versions, provided that you include in the combination all of the
+Invariant Sections of all of the original documents, unmodified, and
+list them all as Invariant Sections of your combined work in its
+license notice, and that you preserve all their Warranty Disclaimers.
+
+The combined work need only contain one copy of this License, and
+multiple identical Invariant Sections may be replaced with a single
+copy. If there are multiple Invariant Sections with the same name but
+different contents, make the title of each such section unique by
+adding at the end of it, in parentheses, the name of the original
+author or publisher of that section if known, or else a unique number.
+Make the same adjustment to the section titles in the list of
+Invariant Sections in the license notice of the combined work.
+
+In the combination, you must combine any sections Entitled ``History''
+in the various original documents, forming one section Entitled
+``History''; likewise combine any sections Entitled ``Acknowledgements'',
+and any sections Entitled ``Dedications''. You must delete all
+sections Entitled ``Endorsements.''
+
+@item
+COLLECTIONS OF DOCUMENTS
+
+You may make a collection consisting of the Document and other documents
+released under this License, and replace the individual copies of this
+License in the various documents with a single copy that is included in
+the collection, provided that you follow the rules of this License for
+verbatim copying of each of the documents in all other respects.
+
+You may extract a single document from such a collection, and distribute
+it individually under this License, provided you insert a copy of this
+License into the extracted document, and follow this License in all
+other respects regarding verbatim copying of that document.
+
+@item
+AGGREGATION WITH INDEPENDENT WORKS
+
+A compilation of the Document or its derivatives with other separate
+and independent documents or works, in or on a volume of a storage or
+distribution medium, is called an ``aggregate'' if the copyright
+resulting from the compilation is not used to limit the legal rights
+of the compilation's users beyond what the individual works permit.
+When the Document is included in an aggregate, this License does not
+apply to the other works in the aggregate which are not themselves
+derivative works of the Document.
+
+If the Cover Text requirement of section 3 is applicable to these
+copies of the Document, then if the Document is less than one half of
+the entire aggregate, the Document's Cover Texts may be placed on
+covers that bracket the Document within the aggregate, or the
+electronic equivalent of covers if the Document is in electronic form.
+Otherwise they must appear on printed covers that bracket the whole
+aggregate.
+
+@item
+TRANSLATION
+
+Translation is considered a kind of modification, so you may
+distribute translations of the Document under the terms of section 4.
+Replacing Invariant Sections with translations requires special
+permission from their copyright holders, but you may include
+translations of some or all Invariant Sections in addition to the
+original versions of these Invariant Sections. You may include a
+translation of this License, and all the license notices in the
+Document, and any Warranty Disclaimers, provided that you also include
+the original English version of this License and the original versions
+of those notices and disclaimers. In case of a disagreement between
+the translation and the original version of this License or a notice
+or disclaimer, the original version will prevail.
+
+If a section in the Document is Entitled ``Acknowledgements'',
+``Dedications'', or ``History'', the requirement (section 4) to Preserve
+its Title (section 1) will typically require changing the actual
+title.
+
+@item
+TERMINATION
+
+You may not copy, modify, sublicense, or distribute the Document
+except as expressly provided under this License. Any attempt
+otherwise to copy, modify, sublicense, or distribute it is void, and
+will automatically terminate your rights under this License.
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License. If your rights have been terminated and not permanently
+reinstated, receipt of a copy of some or all of the same material does
+not give you any rights to use it.
+
+@item
+FUTURE REVISIONS OF THIS LICENSE
+
+The Free Software Foundation may publish new, revised versions
+of the GNU Free Documentation License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns. See
+@uref{https://www.gnu.org/licenses/}.
+
+Each version of the License is given a distinguishing version number.
+If the Document specifies that a particular numbered version of this
+License ``or any later version'' applies to it, you have the option of
+following the terms and conditions either of that specified version or
+of any later version that has been published (not as a draft) by the
+Free Software Foundation. If the Document does not specify a version
+number of this License, you may choose any version ever published (not
+as a draft) by the Free Software Foundation. If the Document
+specifies that a proxy can decide which future versions of this
+License can be used, that proxy's public statement of acceptance of a
+version permanently authorizes you to choose that version for the
+Document.
+
+@item
+RELICENSING
+
+``Massive Multiauthor Collaboration Site'' (or ``MMC Site'') means any
+World Wide Web server that publishes copyrightable works and also
+provides prominent facilities for anybody to edit those works. A
+public wiki that anybody can edit is an example of such a server. A
+``Massive Multiauthor Collaboration'' (or ``MMC'') contained in the
+site means any set of copyrightable works thus published on the MMC
+site.
+
+``CC-BY-SA'' means the Creative Commons Attribution-Share Alike 3.0
+license published by Creative Commons Corporation, a not-for-profit
+corporation with a principal place of business in San Francisco,
+California, as well as future copyleft versions of that license
+published by that same organization.
+
+``Incorporate'' means to publish or republish a Document, in whole or
+in part, as part of another Document.
+
+An MMC is ``eligible for relicensing'' if it is licensed under this
+License, and if all works that were first published under this License
+somewhere other than this MMC, and subsequently incorporated in whole
+or in part into the MMC, (1) had no cover texts or invariant sections,
+and (2) were thus incorporated prior to November 1, 2008.
+
+The operator of an MMC Site may republish an MMC contained in the site
+under CC-BY-SA on the same site at any time before August 1, 2009,
+provided the MMC is eligible for relicensing.
+
+@end enumerate
+
+@page
+@heading ADDENDUM: How to use this License for your documents
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and
+license notices just after the title page:
+
+@smallexample
+@group
+ Copyright (C) @var{year} @var{your name}.
+ Permission is granted to copy, distribute and/or modify this document
+ under the terms of the GNU Free Documentation License, Version 1.3
+ or any later version published by the Free Software Foundation;
+ with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+ Texts. A copy of the license is included in the section entitled ``GNU
+ Free Documentation License''.
+@end group
+@end smallexample
+
+If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
+replace the ``with@dots{}Texts.''@: line with this:
+
+@smallexample
+@group
+ with the Invariant Sections being @var{list their titles}, with
+ the Front-Cover Texts being @var{list}, and with the Back-Cover Texts
+ being @var{list}.
+@end group
+@end smallexample
+
+If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of
+free software license, such as the GNU General Public License,
+to permit their use in free software.
+
+@c Local Variables:
+@c ispell-local-pdict: "ispell-dict"
+@c End:
diff --git a/doc/index_template.html b/doc/index_template.html
new file mode 100644
index 0000000..475cc03
--- /dev/null
+++ b/doc/index_template.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html>
+<head>
+</head>
+
+<title>%%TITLE%%</title>
+<h2>%%TITLE%%</h2>
+
+<h3>last updated %%DATE%%</h3>
+
+<ul>
+<li><a href="%%PACKAGE%%.html">HTML
+ (%%HTML_MONO_SIZE%%K bytes)</a> - entirely on one web page.</li>
+%%IF HTML_NODE%%
+<li><a href="html_node/index.html">HTML</a> - with one web page per
+ node.</li>
+%%ENDIF HTML_NODE%%
+%%IF HTML_SECTION%%
+<li><a href="html_section/index.html">HTML</a> - with one web page per
+ section.</li>
+%%ENDIF HTML_SECTION%%
+%%IF HTML_CHAPTER%%
+<li><a href="html_chapter/index.html">HTML</a> - with one web page per
+ chapter.</li>
+%%ENDIF HTML_CHAPTER%%
+<li><a href="%%PACKAGE%%.html.gz">HTML compressed
+ (%%HTML_MONO_GZ_SIZE%%K gzipped characters)</a> - entirely on
+ one web page.</li>
+%%IF HTML_NODE%%
+<li><a href="%%PACKAGE%%.html_node.tar.gz">HTML compressed
+ (%%HTML_NODE_TGZ_SIZE%%K gzipped tar file)</a> -
+ with one web page per node.</li>
+%%ENDIF HTML_NODE%%
+%%IF HTML_SECTION%%
+<li><a href="%%PACKAGE%%.html_section.tar.gz">HTML compressed
+ (%%HTML_SECTION_TGZ_SIZE%%K gzipped tar file)</a> -
+ with one web page per section.</li>
+%%ENDIF HTML_SECTION%%
+%%IF HTML_CHAPTER%%
+<li><a href="%%PACKAGE%%.html_chapter.tar.gz">HTML compressed
+ (%%HTML_CHAPTER_TGZ_SIZE%%K gzipped tar file)</a> -
+ with one web page per chapter.</li>
+%%ENDIF HTML_CHAPTER%%
+<li><a href="%%PACKAGE%%.info.tar.gz">Info document
+ (%%INFO_TGZ_SIZE%%K bytes gzipped tar file)</a>.</li>
+<li><a href="%%PACKAGE%%.txt">ASCII text
+ (%%ASCII_SIZE%%K bytes)</a>.</li>
+<li><a href="%%PACKAGE%%.txt.gz">ASCII text compressed
+ (%%ASCII_GZ_SIZE%%K bytes gzipped)</a>.</li>
+<li><a href="%%PACKAGE%%.dvi.gz">TeX dvi file
+ (%%DVI_GZ_SIZE%%K bytes gzipped)</a>.</li>
+<li><a href="%%PACKAGE%%.pdf">PDF file
+ (%%PDF_SIZE%%K bytes)</a>.</li>
+<li><a href="%%PACKAGE%%.texi.tar.gz">Texinfo source
+ (%%TEXI_TGZ_SIZE%%K bytes gzipped tar file).</a></li>
+</ul>
+
+</body>
+</html>
diff --git a/gnulib b/gnulib
new file mode 160000
+Subproject d268b4b9646954b4a3b27fa924cf217b09e5acc
diff --git a/guix.scm.in b/guix.scm.in
new file mode 100644
index 0000000..7f4142a
--- /dev/null
+++ b/guix.scm.in
@@ -0,0 +1,24 @@
+(use-modules (guix packages)
+ (guix gexp)
+ (guix build-system gnu)
+ ((guix licenses) #:prefix license:)
+ (gnu packages autotools)
+ (gnu packages readline)
+ (gnu packages pkg-config)
+ (gnu packages man))
+
+(package
+ (name "@PACKAGE_NAME@")
+ (version "@VERSION@")
+ (source (local-file "@PACKAGE_TARNAME@-@VERSION@.tar.gz"))
+ (build-system gnu-build-system)
+ (inputs
+ (list readline))
+ (native-inputs
+ (list autoconf
+ pkg-config
+ help2man))
+ (synopsis "A programming language with constraints")
+ (description "...")
+ (home-page "https://aplwc.org")
+ (license license:gpl3+))
diff --git a/lib/Makefile.am b/lib/Makefile.am
new file mode 100644
index 0000000..ac8555b
--- /dev/null
+++ b/lib/Makefile.am
@@ -0,0 +1,15 @@
+lib_LTLIBRARIES = libaplwc.la
+
+noinst_HEADERS = aplwc_internal.h
+
+libaplwc_la_SOURCES = \
+ autocomplete.c \
+ lookup_syscmd.c \
+ new.c \
+ register_syscmd.c
+
+libaplwc_la_LDFLAGS = -version-info 0:0:0
+
+include_HEADERS = aplwc.h
+
+pkgconfig_DATA = aplwc.pc
diff --git a/lib/aplwc.h b/lib/aplwc.h
new file mode 100644
index 0000000..aef2495
--- /dev/null
+++ b/lib/aplwc.h
@@ -0,0 +1,34 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef APLWC_H
+#define APLWC_H
+
+struct aplwc;
+
+struct aplwc_syscmd {
+ const char *name;
+};
+
+struct aplwc *aplwc_new(void);
+char **aplwc_autocomplete(struct aplwc *, const char *, int, int);
+void aplwc_register_syscmd(struct aplwc *, struct aplwc_syscmd *);
+
+#endif /* APLWC_H */
diff --git a/lib/aplwc.pc.in b/lib/aplwc.pc.in
new file mode 100644
index 0000000..808e117
--- /dev/null
+++ b/lib/aplwc.pc.in
@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: aplwc
+Description: Library interface to aplwc
+Version: @PACKAGE_VERSION@
+
+Libs: -L${libdir} -laplwc
+Cflags: -I${includedir}
+
diff --git a/lib/aplwc_internal.h b/lib/aplwc_internal.h
new file mode 100644
index 0000000..99c16ee
--- /dev/null
+++ b/lib/aplwc_internal.h
@@ -0,0 +1,31 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef APLWC_INTERNAL_H
+#define APLWC_INTERNAL_H
+
+struct aplwc {
+ struct aplwc_syscmd **syscmds;
+ int n_syscmds;
+};
+
+struct aplwc_syscmd *aplwc_lookup_syscmd(struct aplwc *, const char *);
+
+#endif /* APLWC_INTERNAL_H */
diff --git a/lib/autocomplete.c b/lib/autocomplete.c
new file mode 100644
index 0000000..12a8cdc
--- /dev/null
+++ b/lib/autocomplete.c
@@ -0,0 +1,94 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <aplwc.h>
+#include "aplwc_internal.h"
+
+struct completion_state {
+ const struct aplwc *aplwc;
+ int num;
+ const char *word;
+ const int wordlen;
+};
+
+static char **generate(struct aplwc *, const char *, char *(*)(struct completion_state *));
+static char *completions_syscmd(struct completion_state *);
+
+char **
+aplwc_autocomplete(struct aplwc *aplwc, const char *line, int start, int end)
+{
+ int len = end-start;
+ char *word = malloc(sizeof(char) * len+1);
+ char **completions = NULL;
+
+ memcpy(word, line+start, len);
+ word[len] = 0;
+
+ if(start == 0 && word[0] == ')')
+ completions = generate(aplwc, word, completions_syscmd);
+ free(word);
+
+ return completions;
+}
+
+static char **
+generate(struct aplwc *aplwc, const char *word, char *(*fn)(struct completion_state *))
+{
+ char **completions = NULL;
+ struct completion_state state = {
+ .aplwc = aplwc,
+ .num = 0,
+ .word = word,
+ .wordlen = strlen(word),
+ };
+
+ char *c;
+ int index = 0;
+ while(c = fn(&state)){
+ index++;
+ completions = realloc(completions, sizeof(*completions) * (index + 1));
+ completions[index-1] = c;
+ completions[index] = NULL;
+ }
+
+ return completions;
+}
+
+static char *
+completions_syscmd(struct completion_state *state)
+{
+ struct aplwc_syscmd *syscmd;
+
+ while(syscmd = state->aplwc->syscmds[state->num++]){
+ const char *name = syscmd->name;
+ if(strncmp(name, state->word+1, state->wordlen-1) == 0){
+ int len = strlen(name);
+ char *result = malloc(sizeof(char) * (len + 2));
+ result[0] = ')';
+ memcpy(result+1, name, sizeof(char) * (len+1));
+ return result;
+ }
+ }
+
+ return NULL;
+}
diff --git a/lib/lookup_syscmd.c b/lib/lookup_syscmd.c
new file mode 100644
index 0000000..40aa19d
--- /dev/null
+++ b/lib/lookup_syscmd.c
@@ -0,0 +1,32 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <aplwc.h>
+#include "aplwc_internal.h"
+
+struct aplwc_syscmd *
+aplwc_lookup_syscmd(struct aplwc *aplwc, const char *name)
+{
+ for(struct aplwc_syscmd **syscmd = aplwc->syscmds; *syscmd; syscmd++)
+ if(strcmp((*syscmd)->name, name) == 0)
+ return *syscmd;
+ return NULL;
+}
diff --git a/lib/new.c b/lib/new.c
new file mode 100644
index 0000000..4454f47
--- /dev/null
+++ b/lib/new.c
@@ -0,0 +1,36 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <aplwc.h>
+#include "aplwc_internal.h"
+
+struct aplwc *
+aplwc_new(void)
+{
+ struct aplwc *aplwc = malloc(sizeof(*aplwc));
+ memset(aplwc, 0, sizeof(*aplwc));
+
+ aplwc->syscmds = malloc(sizeof(aplwc->syscmds[0]));
+ aplwc->syscmds[0] = NULL;
+
+ return aplwc;
+}
diff --git a/lib/register_syscmd.c b/lib/register_syscmd.c
new file mode 100644
index 0000000..dd08a6a
--- /dev/null
+++ b/lib/register_syscmd.c
@@ -0,0 +1,39 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <aplwc.h>
+#include "aplwc_internal.h"
+
+void
+aplwc_register_syscmd(struct aplwc *aplwc, struct aplwc_syscmd *syscmd)
+{
+ if(aplwc_lookup_syscmd(aplwc, syscmd->name))
+ return;
+
+ int n = 0;
+ for(struct aplwc_syscmd **tmp = aplwc->syscmds; *tmp; tmp++)
+ n++;
+
+ aplwc->syscmds = realloc(aplwc->syscmds, sizeof(aplwc->syscmds[0]) * (n+2));
+ aplwc->syscmds[n] = syscmd;
+ aplwc->syscmds[n+1] = NULL;
+}
diff --git a/po/.gitignore b/po/.gitignore
new file mode 100644
index 0000000..14d0178
--- /dev/null
+++ b/po/.gitignore
@@ -0,0 +1,10 @@
+/Makefile.in.in~
+/remove-potcdate.sin
+/quot.sed
+/insert-header.sin
+/en@quot.header
+/en@boldquot.header
+/boldquot.sed
+/Rules-quot
+/Makevars.template
+/Makefile.in.in
diff --git a/po/LINGUAS b/po/LINGUAS
new file mode 100644
index 0000000..f70ef7d
--- /dev/null
+++ b/po/LINGUAS
@@ -0,0 +1,3 @@
+en@quot
+en@boldquot
+da \ No newline at end of file
diff --git a/po/Makevars b/po/Makevars
new file mode 100644
index 0000000..ff0560c
--- /dev/null
+++ b/po/Makevars
@@ -0,0 +1,87 @@
+# Makefile variables for PO directory in any package using GNU gettext.
+#
+# Copyright (C) 2003-2019 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation gives
+# unlimited permission to use, copy, distribute, and modify it.
+
+# Usually the message domain is the same as the package name.
+DOMAIN = $(PACKAGE)
+
+# These two variables depend on the location of this directory.
+subdir = po
+top_builddir = ..
+
+# These options get passed to xgettext.
+XGETTEXT_OPTIONS = --keyword=_ --keyword=N_ \
+ \
+ --flag=_:1:pass-c-format\
+ --flag=N_:1:pass-c-format\
+ --flag=error:3:c-format --flag=error_at_line:5:c-format\
+ $${end_of_xgettext_options+}
+
+# This is the copyright holder that gets inserted into the header of the
+# $(DOMAIN).pot file. Set this to the copyright holder of the surrounding
+# package. (Note that the msgstr strings, extracted from the package's
+# sources, belong to the copyright holder of the package.) Translators are
+# expected to transfer the copyright for their translations to this person
+# or entity, or to disclaim their copyright. The empty string stands for
+# the public domain; in this case the translators are expected to disclaim
+# their copyright.
+COPYRIGHT_HOLDER = Free Software Foundation, Inc.
+
+# This tells whether or not to prepend "GNU " prefix to the package
+# name that gets inserted into the header of the $(DOMAIN).pot file.
+# Possible values are "yes", "no", or empty. If it is empty, try to
+# detect it automatically by scanning the files in $(top_srcdir) for
+# "GNU packagename" string.
+PACKAGE_GNU =
+
+# This is the email address or URL to which the translators shall report
+# bugs in the untranslated strings:
+# - Strings which are not entire sentences, see the maintainer guidelines
+# in the GNU gettext documentation, section 'Preparing Strings'.
+# - Strings which use unclear terms or require additional context to be
+# understood.
+# - Strings which make invalid assumptions about notation of date, time or
+# money.
+# - Pluralisation problems.
+# - Incorrect English spelling.
+# - Incorrect formatting.
+# It can be your email address, or a mailing list address where translators
+# can write to without being subscribed, or the URL of a web page through
+# which the translators can contact you.
+MSGID_BUGS_ADDRESS = bug-aplwc@gnu.org
+
+# This is the list of locale categories, beyond LC_MESSAGES, for which the
+# message catalogs shall be used. It is usually empty.
+EXTRA_LOCALE_CATEGORIES =
+
+# This tells whether the $(DOMAIN).pot file contains messages with an 'msgctxt'
+# context. Possible values are "yes" and "no". Set this to yes if the
+# package uses functions taking also a message context, like pgettext(), or
+# if in $(XGETTEXT_OPTIONS) you define keywords with a context argument.
+USE_MSGCTXT = no
+
+# These options get passed to msgmerge.
+# Useful options are in particular:
+# --previous to keep previous msgids of translated messages,
+# --quiet to reduce the verbosity.
+MSGMERGE_OPTIONS =
+
+# These options get passed to msginit.
+# If you want to disable line wrapping when writing PO files, add
+# --no-wrap to MSGMERGE_OPTIONS, XGETTEXT_OPTIONS, and
+# MSGINIT_OPTIONS.
+MSGINIT_OPTIONS =
+
+# This tells whether or not to regenerate a PO file when $(DOMAIN).pot
+# has changed. Possible values are "yes" and "no". Set this to no if
+# the POT file is checked in the repository and the version control
+# program ignores timestamps.
+PO_DEPENDS_ON_POT = yes
+
+# This tells whether or not to forcibly update $(DOMAIN).pot and
+# regenerate PO files on "make dist". Possible values are "yes" and
+# "no". Set this to no if the POT file and PO files are maintained
+# externally.
+DIST_DEPENDS_ON_UPDATE_PO = yes
diff --git a/po/POTFILES.in b/po/POTFILES.in
new file mode 100644
index 0000000..3f27f82
--- /dev/null
+++ b/po/POTFILES.in
@@ -0,0 +1,7 @@
+lib/autocomplete.c
+lib/lookup_syscmd.c
+lib/new.c
+lib/register_syscmd.c
+src/main.c
+src/readline.c
+src/syscmd.c
diff --git a/po/da.po b/po/da.po
new file mode 100644
index 0000000..791f4de
--- /dev/null
+++ b/po/da.po
@@ -0,0 +1,62 @@
+#
+# <>, Inc-2026.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: aplwc 0.1.6-fa0c-modified\n"
+"Report-Msgid-Bugs-To: bug-aplwc@gnu.org\n"
+"POT-Creation-Date: 2026-04-03 19:30+0200\n"
+"PO-Revision-Date: 2026-04-03 14:54+0200\n"
+"Last-Translator: <>\n"
+"Language-Team: Danish\n"
+"Language: da\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Generator: Gtranslator 49.0\n"
+
+#: src/main.c:68
+#, c-format
+msgid "You typed: %s\n"
+msgstr "Du skrev: %s\n"
+
+#: src/main.c:71
+#, c-format
+msgid "bye\n"
+msgstr "farvel\n"
+
+#: src/main.c:78
+#, c-format
+msgid "Copyright (C) 2026 Peter Mikkelsen\n"
+msgstr ""
+
+#: src/main.c:79
+#, c-format
+msgid ""
+"License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/"
+"gpl.html>.\n"
+"This is free software: you are free to change and redistribute it.\n"
+"There is NO WARRANTY, to the extent permitted by law.\n"
+msgstr ""
+
+#: src/main.c:88
+#, c-format
+msgid ""
+"Usage: %s [OPTION...]\n"
+"\n"
+msgstr "Brug: %s [TILVALG...]\n"
+
+#: src/main.c:89
+#, c-format
+msgid " -h, --help display this help and exit\n"
+msgstr " -h, --help vis denne hjælp og afslut\n"
+
+#: src/main.c:90
+#, c-format
+msgid " -v, --version display version information and exit\n"
+msgstr " -v, --version vis versionsinformation og afslut\n"
+
+#, c-format
+#~ msgid "Hello from aplwc version '%s'\n"
+#~ msgstr "Hej fra aplwc version '%s'\n"
diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..b9463d4
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,18 @@
+bin_PROGRAMS = aplwc
+dist_man_MANS = aplwc.1
+
+aplwc_SOURCES = \
+ main.c \
+ nls.h \
+ readline.c \
+ readline.h \
+ syscmd.c \
+ syscmd.h
+
+aplwc_CPPFLAGS = $(READLINE_CFLAGS) -DLOCALEDIR=\"$(localedir)\" -I$(top_srcdir)/lib -I$(top_srcdir)/gnu -I$(top_builddir)/gnu
+aplwc_LDADD = $(LTLIBINTL) ../lib/libaplwc.la ../gnu/libgnu.la $(READLINE_LIBS)
+
+CLEANFILES = aplwc.1
+
+aplwc.1: aplwc
+ $(AM_V_GEN)help2man --output=$@ $(top_builddir)/src/aplwc$(EXEEXT)
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..f163558
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,92 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <aplwc.h>
+#include "nls.h"
+#include "syscmd.h"
+#include "readline.h"
+
+static struct option long_options[] = {
+ {"help", no_argument, 0, 'h'},
+ {"version", no_argument, 0, 'v'},
+ {NULL, 0, NULL, 0}
+};
+
+static void version(void);
+static void help(int);
+
+int
+main(int argc, char *argv[])
+{
+ init_nls();
+
+ int opt;
+ while((opt = getopt_long(argc, argv, "hv", long_options, NULL)) != -1){
+ switch(opt){
+ case 'h':
+ help(EXIT_SUCCESS);
+ break;
+ case 'v':
+ version();
+ break;
+ default:
+ help(EXIT_FAILURE);
+ break;
+ }
+ }
+
+ struct aplwc *aplwc = aplwc_new();
+ init_syscmds(aplwc);
+ init_readline(aplwc);
+
+ char *line;
+ while(line = readline(" ")){
+ if(strlen(line) == 0)
+ continue;
+ add_history(line);
+ printf(_("You typed: %s\n"), line);
+ free(line);
+ }
+ printf(_("bye\n"));
+}
+
+static void
+version(void)
+{
+ printf("%s %s\n", PACKAGE_NAME, PACKAGE_VERSION);
+ printf(_("Copyright (C) 2026 Peter Mikkelsen\n"));
+ printf(_("License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.\n"
+ "This is free software: you are free to change and redistribute it.\n"
+ "There is NO WARRANTY, to the extent permitted by law.\n"));
+ exit(EXIT_SUCCESS);
+}
+
+static void
+help(int status)
+{
+ printf(_("Usage: %s [OPTION...]\n\n"), PACKAGE_NAME);
+ printf(_(" -h, --help display this help and exit\n"));
+ printf(_(" -v, --version display version information and exit\n"));
+ exit(status);
+}
diff --git a/src/nls.h b/src/nls.h
new file mode 100644
index 0000000..363fa0a
--- /dev/null
+++ b/src/nls.h
@@ -0,0 +1,36 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/* This file must be included after <config.h> */
+
+#if ENABLE_NLS
+#include <locale.h>
+#include <libintl.h>
+#define _(S) dgettext(PACKAGE, S)
+#define init_nls() \
+ do{ \
+ setlocale(LC_ALL, ""); \
+ bindtextdomain(PACKAGE, LOCALEDIR); \
+ textdomain(PACKAGE); \
+ }while(0)
+#else
+#define _(S) S
+#define init_nls() (void)0
+#endif
diff --git a/src/readline.c b/src/readline.c
new file mode 100644
index 0000000..bda4df9
--- /dev/null
+++ b/src/readline.c
@@ -0,0 +1,56 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include "readline.h"
+
+static struct aplwc *aplwc;
+static char **completions;
+static int completion_index;
+
+static char **complete(const char *, int, int);
+static char *get_completion(const char *, int);
+
+void
+init_readline(struct aplwc *_aplwc)
+{
+ aplwc = _aplwc;
+ rl_readline_name = "aplwc";
+ rl_attempted_completion_function = complete;
+}
+
+static char **
+complete(const char *text, int start, int end)
+{
+ rl_attempted_completion_over = 1;
+ completions = aplwc_autocomplete(aplwc, rl_line_buffer, start, end);
+ char **result = NULL;
+ if(completions)
+ result = rl_completion_matches(text, get_completion);
+ free(completions);
+ return result;
+}
+
+static char *
+get_completion(const char *text, int state)
+{
+ return completions[state];
+}
diff --git a/src/readline.h b/src/readline.h
new file mode 100644
index 0000000..92045d6
--- /dev/null
+++ b/src/readline.h
@@ -0,0 +1,31 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef READLINE_H
+#define READLINE_H
+
+#include <stdio.h>
+#include <readline/readline.h>
+#include <readline/history.h>
+#include <aplwc.h>
+
+void init_readline(struct aplwc *);
+
+#endif /* READLINE_H */
diff --git a/src/syscmd.c b/src/syscmd.c
new file mode 100644
index 0000000..6c3d2e5
--- /dev/null
+++ b/src/syscmd.c
@@ -0,0 +1,36 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include "syscmd.h"
+
+static struct aplwc_syscmd syscmds[] = {
+ {.name = "help"},
+ {.name = "version"},
+ {.name = "reset"},
+ {.name = "exit"},
+};
+
+void
+init_syscmds(struct aplwc *aplwc)
+{
+ for(int i = 0; i < (sizeof(syscmds)/sizeof(*syscmds)); i++)
+ aplwc_register_syscmd(aplwc, &syscmds[i]);
+}
diff --git a/src/syscmd.h b/src/syscmd.h
new file mode 100644
index 0000000..db4a874
--- /dev/null
+++ b/src/syscmd.h
@@ -0,0 +1,28 @@
+/* Aplwc - A Programming Language With Constraints
+ *
+ * Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
+ *
+ * This file is part of aplwc.
+ *
+ * Aplwc is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Aplwc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with aplwc. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef SYSCMD_H
+#define SYSCMD_H
+
+#include <aplwc.h>
+
+void init_syscmds(struct aplwc *);
+
+#endif /* SYSCMD_H */
diff --git a/tests/Makefile.am b/tests/Makefile.am
new file mode 100644
index 0000000..44e31d3
--- /dev/null
+++ b/tests/Makefile.am
@@ -0,0 +1,19 @@
+TESTSUITE_SRC = $(srcdir)/testsuite.at
+TESTSUITE = $(builddir)/testsuite
+EXTRA_DIST = $(TESTSUITE_SRC)
+
+DISTCLEANFILES = $(TESTSUITE) atconfig
+
+AUTOM4TE = $(SHELL) $(top_srcdir)/build-aux/missing --run autom4te
+AUTOTEST = $(AUTOM4TE) --language=autotest
+
+$(TESTSUITE): $(TESTSUITE_SRC)
+ $(AUTOTEST) $(TESTSUITE_SRC) > $(TESTSUITE)
+
+check-local: $(TESTSUITE)
+ $(SHELL) $(TESTSUITE)
+
+clean-local:
+ test ! -f $(TESTSUITE) || \
+ $(SHELL) $(TESTSUITE) --clean
+
diff --git a/tests/atlocal.in b/tests/atlocal.in
new file mode 100644
index 0000000..d105ffc
--- /dev/null
+++ b/tests/atlocal.in
@@ -0,0 +1 @@
+PATH=@abs_top_builddir@/src:$PATH
diff --git a/tests/package.m4.in b/tests/package.m4.in
new file mode 100644
index 0000000..6db7b87
--- /dev/null
+++ b/tests/package.m4.in
@@ -0,0 +1,6 @@
+m4_define([AT_PACKAGE_NAME], [@PACKAGE_NAME@]);
+m4_define([AT_PACKAGE_TARNAME], [@PACKAGE_TARNAME@]);
+m4_define([AT_PACKAGE_VERSION], [@PACKAGE_VERSION@]);
+m4_define([AT_PACKAGE_STRING], [@PACKAGE_STRING@]);
+m4_define([AT_PACKAGE_BUGREPORT], [@PACKAGE_BUGREPORT@]);
+m4_define([AT_PACKAGE_URL], [@PACKAGE_URL@]);
diff --git a/tests/testsuite.at b/tests/testsuite.at
new file mode 100644
index 0000000..41af6b5
--- /dev/null
+++ b/tests/testsuite.at
@@ -0,0 +1,19 @@
+AT_INIT([aplwc-repl test suite])
+AT_COLOR_TESTS
+
+AT_SETUP([Command line arguments])
+AT_TESTED([aplwc])
+AT_CHECK([aplwc --version | sed 1q], [0], [AT_PACKAGE_NAME AT_PACKAGE_VERSION
+])
+AT_CHECK([aplwc -v | sed 1q], [0], [AT_PACKAGE_NAME AT_PACKAGE_VERSION
+])
+AT_CHECK([aplwc --help | sed 1q], [0], [Usage: aplwc [[OPTION...]]
+])
+AT_CHECK([aplwc --h | sed 1q], [0], [Usage: aplwc [[OPTION...]]
+])
+AT_CHECK([aplwc --some-unknown-long-option], [1], ignore, ignore)
+AT_CHECK([aplwc -k], [1], ignore, ignore)
+AT_CHECK([aplwc --help | grep -e '-v, --version'], [0], ignore)
+AT_CHECK([aplwc --help | grep -e '-h, --help'], [0], ignore)
+AT_CHECK([aplwc --help | grep -e '-k, --ksdfsgs'], [1], ignore, ignore)
+AT_CLEANUP \ No newline at end of file