chore(build): Update

20 files changed, 1886 insertions, 0 deletions

diff --git a/build/c/.ccls b/build/c/.ccls
new file mode 100644
index 0000000..90584dd
--- /dev/null
+++ b/build/c/.ccls
@@ -0,0 +1 @@
+gcc
diff --git a/build/c/.envrc b/build/c/.envrc
new file mode 100644
index 0000000..8f9d5d7
--- /dev/null
+++ b/build/c/.envrc
@@ -0,0 +1,10 @@
+use flake || use nix
+watch_file flake.nix
+
+PATH_add ./target
+PATH_add ./scripts
+
+if on_git_branch; then
+  echo && git status --short --branch &&
+  echo && git fetch --verbose
+fi
diff --git a/build/c/.gitignore b/build/c/.gitignore
new file mode 100644
index 0000000..8dad36b
--- /dev/null
+++ b/build/c/.gitignore
@@ -0,0 +1,7 @@
+# build
+/target
+/result
+
+# dev env
+.direnv
+.ccls-cache
diff --git a/build/c/.licensure.yml b/build/c/.licensure.yml
new file mode 100644
index 0000000..639d750
--- /dev/null
+++ b/build/c/.licensure.yml
@@ -0,0 +1,186 @@
+---
+# Regexes which if matched by a file path will always be excluded from
+# getting a license header
+excludes:
+  - .*lock
+  - \.git/.*
+  - LICENSE.spdx
+  - LICENSE
+  - COPYING
+  - COPYING.LESSER
+  - .*\.(rst|txt|pdf)
+# Definition of the licenses used on this project and to what files
+# they should apply.
+#
+# No default license configuration is provided. This section must be
+# configured by the user.
+licenses:
+  - files: \.tex
+    ident: CC-BY-SA-4.0
+    authors:
+      - name: "%INIT_AUTHOR_NAME"
+        email: "%INIT_AUTHOR_EMAIL"
+
+    template: |
+      %INIT_APPLICATION_NAME_STYLIZED %INIT_YEAR - [year] (C) by [name of author]
+      SPDX-License-Identifier: CC-BY-SA-4.0
+
+      %INIT_APPLICATION_NAME_STYLIZED is licensed under a
+      Creative Commons Attribution-ShareAlike 4.0 International License.
+
+      You should have received a copy of the license along with this
+      work.  If not, see <https://creativecommons.org/licenses/by-sa/4.0/>.
+
+    unwrap_text: false
+
+  # Either a regex or the string "any" to determine to what files this
+  # license should apply. It is common for projects to have files
+  # under multiple licenses or with multiple copyright holders. This
+  # provides the ability to automatically license files correctly
+  # based on their file paths.
+  #
+  # If "any" is provided all files will match this license.
+  - files: any
+    #
+    #   The license identifier, a list of common identifiers can be
+    #   found at: https://spdx.org/licenses/ but existence of the ident
+    #   in this list it is not enforced unless auto_template is set to
+    #   true.
+    ident: GPL-3.0-or-later
+    #
+    #   A list of authors who hold copyright over these files
+    authors:
+      # Provide either your full name or company name for copyright purposes
+      - name: "%INIT_AUTHOR_NAME"
+        # Optionally provide email for copyright purposes
+        email: "%INIT_AUTHOR_EMAIL"
+
+    #   The template that will be rendered to generate the header before
+    #   comment characters are applied. Available variables are:
+    #    - [year]: substituted with the current year.
+    #    - [name of author]: Substituted with name of the author and email
+    #      if provided. If email is provided the output appears as Full
+    #      Name <email@example.com>. If multiple authors are provided the
+    #      list is concatenated together with commas.
+    template: |
+        Copyright (C) %INIT_YEAR - [year]:
+        [name of author]
+        SPDX-License-Identifier: GPL-3.0-or-later
+
+        This file is part of %INIT_APPLICATION_NAME_STYLIZED.
+
+        %INIT_APPLICATION_NAME_STYLIZED is free software: you can redistribute it and/or modify
+        it under the terms of the Lesser 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
+        and the Lesser GNU General Public License along with this program.
+        If not, see <https://www.gnu.org/licenses/>.
+
+
+    #   If auto_template is true then template is ignored and the SPDX
+    #   API will be queried with the ident value to automatically
+    #   determine the license header template. auto_template works best
+    #   with licenses that have a standardLicenseHeader field defined in
+    #   their license info JSON, if it is not then we will use the full
+    #   licenseText to generate the header which works fine for short
+    #   licenses like MIT but can be quite lengthy for other licenses
+    #   like BSD-4-Clause. The above default template is valid for most
+    #   licenses and is recommended for MIT, and BSD licenses. Common
+    #   licenses that work well with the auto_template feature are GPL
+    #   variants, and the Apache 2.0 license.
+    #
+    #   Important Note: this means the ident must be a valid SPDX identifier
+    # auto_template: true
+
+    #   If true try to detect the text wrapping of the template, and unwrap it
+    unwrap_text: false
+
+# Define type of comment characters to apply based on file extensions.
+comments:
+  # The extensions (or singular extension) field defines which file
+  # extensions to apply the commenter to.
+  - extensions:
+      - js
+      - go
+    # The commenter field defines the kind of commenter to
+    # generate. There are two types of commenters: line and block.
+    #
+    # This demonstrates a line commenter configuration. A line
+    # commenter type will apply the comment_char to the beginning of
+    # each line in the license header. It will then apply a number of
+    # empty newlines to the end of the header equal to trailing_lines.
+    #
+    # If trailing_lines is omitted it is assumed to be 0.
+    commenter:
+      type: line
+      comment_char: "//"
+      trailing_lines: 1
+
+  - extensions:
+      - rs
+      - tri
+      - css
+      - cpp
+      - c
+      - h
+    # This demonstrates a block commenter configuration. A block
+    # commenter type will add start_block_char as the first character
+    # in the license header and add end_block_char as the last character
+    # in the license header. If per_line_char is provided each line of
+    # the header between the block start and end characters will be
+    # line commented with the per_line_char
+    #
+    # trailing_lines works the same for both block and line commenter
+    # types
+    commenter:
+      type: block
+      start_block_char: "/*\n"
+      end_block_char: "*/\n"
+      per_line_char: "*"
+      trailing_lines: 1
+
+  - extension:
+      - html
+      - md
+    commenter:
+      type: block
+      start_block_char: "<!--\n"
+      end_block_char: "-->\n"
+      trailing_lines: 1
+
+  - extensions:
+      - el
+      - lisp
+    commenter:
+      type: line
+      comment_char: ";;;"
+      trailing_lines: 1
+
+  - extensions:
+      - tex
+      - bib
+    commenter:
+      type: line
+      comment_char: "%"
+      trailing_lines: 1
+
+  # The extension string "any" is special and so will match any file
+  # extensions. Commenter configurations are always checked in the
+  # order they are defined, so if any is used it should be the last
+  # commenter configuration or else it will override all others.
+  #
+  # In this configuration if we can't match the file extension we fall
+  # back to the popular '#' line comment used in most scripting
+  # languages.
+  - extension: any
+    commenter:
+      type: line
+      comment_char: '#'
+      trailing_lines: 1
diff --git a/build/c/COPYING b/build/c/COPYING
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/build/c/COPYING
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
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+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
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+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
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+
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+paragraph of section 11).
+
+  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, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  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/build/c/LICENSE.spdx b/build/c/LICENSE.spdx
new file mode 100644
index 0000000..2b99390
--- /dev/null
+++ b/build/c/LICENSE.spdx
@@ -0,0 +1,7 @@
+SPDXVersion: SPDX-2.3
+DataLicense: CC0-1.0
+Creator: flake template init
+PackageName: %INIT_APPLICATION_NAME
+PackageOriginator: %INIT_APPLICATION_ORIGINATOR
+PackageHomePage: %INIT_APPLICATION_HOME_PAGE
+PackageLicenseDeclared: %INIT_SPDX_LICENSE_IDENTIFIER
diff --git a/build/c/README.md b/build/c/README.md
new file mode 100644
index 0000000..46287a6
--- /dev/null
+++ b/build/c/README.md
@@ -0,0 +1,12 @@
+# %INIT_APPLICATION_NAME_STYLIZED
+
+> %INIT_DESCRIPTION
+
+Some text about the project.
+
+## Licence
+
+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.
diff --git a/build/c/cog.toml b/build/c/cog.toml
new file mode 100644
index 0000000..ccca764
--- /dev/null
+++ b/build/c/cog.toml
@@ -0,0 +1,24 @@
+tag_prefix = "v"
+branch_whitelist = ["main", "prime"]
+ignore_merge_commits = false
+
+pre_bump_hooks = [
+  "nix flake check",                                                    # verify the project builds
+  "./scripts/renew_copyright_header.sh",                                # update the license header in each file
+  "flake_version_update --version v{{version}} --input-file flake.nix", # update the version in the flake.nix file
+  "nix fmt",                                                            # format
+]
+post_bump_hooks = [
+  "git push",
+  "git push origin v{{version}}", # push the new tag to origin
+]
+
+[bump_profiles]
+
+[changelog]
+path = "NEWS.md"
+template = "remote"
+remote = "%INIT_REMOTE"
+repository = "%INIT_REPOSITORY"
+owner = "%INIT_OWNER"
+authors = [{ signature = "%INIT_AUTHOR_NAME", username = "%INIT_OWNER" }]
diff --git a/build/c/docs/%INIT_APPLICATION_NAME.1.md b/build/c/docs/%INIT_APPLICATION_NAME.1.md
new file mode 100644
index 0000000..e044647
--- /dev/null
+++ b/build/c/docs/%INIT_APPLICATION_NAME.1.md
@@ -0,0 +1,54 @@
+% %INIT_APPLICATION_NAME_CAPITALIZED_MAN_PART %INIT_APPLICATION_NAME %INIT_APPLICATION_VERSION
+% %INIT_AUTHOR_NAME
+% %INIT_CURRENT_DATE
+
+# NAME
+
+%INIT_APPLICATION_NAME - %INIT_DESCRIPTION
+
+# SYNOPSIS
+
+**%INIT_APPLICATION_NAME** \[*--help*|*--version*\]
+
+# DESCRIPTION
+
+TODO
+
+# OPTIONS
+
+**--help**, **-h**
+: Displays a help message and exit.
+
+**--version**, **-v**
+: Displays the software version and exit.
+
+# EXAMPLES
+
+**%INIT_APPLICATION_NAME**
+: TODO. See the Description section for further details.
+
+# FILES
+
+*name.file*
+: This file is important because it does x.
+
+# BUGS
+
+Report bugs to <https://%INIT_REMOTE/%INIT_OWNER/%INIT_REPOSITORY/issues>.
+
+# COPYRIGHT
+
+Copyright (C) %INIT_YEAR  %INIT_AUTHOR_NAME
+
+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/>.
diff --git a/build/c/flake.lock b/build/c/flake.lock
new file mode 100644
index 0000000..0f32b70
--- /dev/null
+++ b/build/c/flake.lock
@@ -0,0 +1,102 @@
+{
+  "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": [
+          "systems"
+        ]
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1711715736,
+        "narHash": "sha256-9slQ609YqT9bT/MNX9+5k5jltL9zgpn36DpFB7TkttM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "807c549feabce7eddbf259dbdcec9e0600a0660d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "systems": "systems",
+        "treefmt-nix": "treefmt-nix"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1680978846,
+        "narHash": "sha256-Gtqg8b/v49BFDpDetjclCYXm8mAnTrUzR0JnE2nv5aw=",
+        "owner": "nix-systems",
+        "repo": "x86_64-linux",
+        "rev": "2ecfcac5e15790ba6ce360ceccddb15ad16d08a8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "x86_64-linux",
+        "type": "github"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1711803027,
+        "narHash": "sha256-Qic3OvsVLpetchzaIe2hJqgliWXACq2Oee6mBXa/IZQ=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "1810d51a015c1730f2fe05a255258649799df416",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/build/c/flake.nix b/build/c/flake.nix
new file mode 100644
index 0000000..fea015c
--- /dev/null
+++ b/build/c/flake.nix
@@ -0,0 +1,87 @@
+{
+  description = "%INIT_DESCRIPTION";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+    treefmt-nix = {
+      url = "github:numtide/treefmt-nix";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
+
+    flake_version_update = {
+      url = "git+https://codeberg.org/soispha/flake_version_update.git";
+      inputs = {
+        systems.follows = "systems";
+        nixpkgs.follows = "nixpkgs";
+        flake-utils.follows = "flake-utils";
+      };
+    };
+
+    # inputs for following
+    systems = {
+      url = "github:nix-systems/x86_64-linux"; # only evaluate for this system
+    };
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
+    flake-utils = {
+      url = "github:numtide/flake-utils";
+      inputs = {
+        systems.follows = "systems";
+      };
+    };
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    treefmt-nix,
+    flake_version_update,
+    ...
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = nixpkgs.legacyPackages."${system}";
+
+      nativeBuildInputs = with pkgs; [valgrind pandoc];
+      treefmtEval = import ./treefmt.nix {inherit treefmt-nix pkgs;};
+
+      # This version is set automatically on `cog bump --auto`;
+      version = "v%INIT_APPLICATION_VERSION"; # GUIDING VERSION STRING
+      pname = "%INIT_APPLICATION_NAME";
+
+      build = pkgs.stdenv.mkDerivation {
+        inherit pname version;
+
+        src = ./.;
+        makeFlags = ["PREFIX=${placeholder "out"}" "BIN_VERSION=${version}"];
+        inherit nativeBuildInputs;
+      };
+    in {
+      packages.default = build;
+      checks = {
+        inherit build;
+        formatting = treefmtEval.config.build.check self;
+      };
+      formatter = treefmtEval.config.build.wrapper;
+
+      devShells.default = pkgs.mkShell {
+        packages = with pkgs; [
+          cocogitto
+          flake_version_update.packages."${system}".default
+
+          licensure
+        ];
+        inherit nativeBuildInputs;
+        env = {
+          GCC_COLORS = "error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01";
+        };
+      };
+    });
+}
+# vim: ts=2
+
diff --git a/build/c/init b/build/c/init
new file mode 100644
index 0000000..f416b34
--- /dev/null
+++ b/build/c/init
@@ -0,0 +1,139 @@
+#!/usr/bin/env sh
+
+# shellcheck source=/dev/null
+. "$(realpath "$(dirname "$0")")/shell_line_editor.sh"
+
+replacement_file="$(mktemp)"
+
+trap cleanup INT
+trap "cleanup; remove_self" EXIT
+cleanup() {
+    rm "$replacement_file"
+}
+remove_self() {
+    rm "$(realpath "$0")"
+    rm "$(realpath "$(dirname "$0")")/shell_line_editor.sh"
+}
+
+# Prompt the user for a specific variable.
+# ## Args:
+# [1]: Name of the variable to populate the answer to
+# [2]: An optional description
+# [3]: An optionally suggested answer
+# [4]: If this is set, the user is not even asked.
+prompt() {
+    pr_variable_upper="$(echo "$1" | sed 's/\([a-z]\)/\U\1/')"
+    pr_description="$2"
+    pr_suggested_answer="$3"
+    pr_ask="$4"
+
+    if [ -n "$pr_ask" ]; then
+        REPLY="$pr_suggested_answer"
+    else
+        printf "\033[94;1mEnter %s\033[0m" "$pr_variable_upper"
+        if [ -n "$pr_description" ]; then
+            printf " (\033[93;1m%s\033[0m):\n" "$pr_description"
+        else
+            printf ":\n"
+        fi
+
+        # LE "> " 0 " " "$pr_suggested_answer" "yes_please_produce_debug_output"
+        LE "> " 0 " " "$pr_suggested_answer" ""
+    fi
+
+    pr_new_variable="$(printf '%s="%s"' "$pr_variable_upper" "$REPLY")"
+
+    eval "$pr_new_variable"
+    printf "%s\n" "$pr_new_variable" >>"$replacement_file"
+}
+
+git init
+
+# necessary meta data
+prompt APPLICATION_NAME "The name of the application" "$(basename "$PWD")"
+prompt APPLICATION_NAME_STYLIZED "The stylized name of the application (for documentation)" "$(echo "$APPLICATION_NAME" | sed 's/\([a-z]*\)/\u\1/')"
+prompt APPLICATION_NAME_CAPITALIZED_MAN_PART "The capitalized name of the application (for documentation also with a man section part)" "$(echo "$APPLICATION_NAME" | sed 's/\([a-z]*\)/\U\1(1)/')" "dont_ask"
+prompt APPLICATION_VERSION "The version of this program, without the prefix" "0.1.0"
+
+prompt AUTHOR_NAME "The name of the author (or authors)" "$(git config --get user.name)"
+prompt AUTHOR_EMAIL "The email of the author (or authors)" "$(git config --get user.email)"
+
+# cog change-log variables
+prompt REMOTE "The remote, this project will be pushed to" "git.vhack.eu"
+prompt REPOSITORY "The name of the repository in the remote" "$APPLICATION_NAME"
+prompt OWNER "The name of owner of the repository" "$AUTHOR_NAME"
+
+# nice meta data
+prompt DESCRIPTION "The description of this project" "[can be empty]"
+prompt CURRENT_DATE "The stylized version of the current date" "$(date +'%b %Y')"
+prompt YEAR "The year the work on this has begun (for copyright reasons)" "$(date +'%Y')"
+prompt APPLICATION_SOURCE_CODE_REPOSITORY "The package's source code repository URL" "https://$REMOTE/$OWNER/$REPOSITORY"
+
+# LICENSE.spdx data (source: https://github.com/david-a-wheeler/spdx-tutorial)
+if [ -e ./lpm.toml ]; then
+    # Use a different default license in latex projects.
+    init_default_license="CC-BY-SA-4.0"
+else
+    init_default_license="GPL-3.0-or-later"
+fi
+prompt SPDX_LICENSE_IDENTIFIER "THE SPDX identifer of your choosen license" "$init_default_license"
+prompt APPLICATION_ORIGINATOR "The person or organization from whom the package originally came" "$AUTHOR_NAME"
+prompt APPLICATION_HOME_PAGE "The package's home page URL" "https://$REMOTE/$OWNER/$REPOSITORY"
+
+echo "Downloading license .."
+case "$SPDX_LICENSE_IDENTIFIER" in
+"AGPL-3.0-or-later")
+    default_license_url="https://www.gnu.org/licenses/agpl-3.0.txt"
+    curl "$default_license_url" >COPYING
+    ;;
+"GPL-3.0-or-later")
+    default_license_url="https://www.gnu.org/licenses/gpl-3.0.txt"
+    curl "$default_license_url" >COPYING
+    ;;
+"LGPL-3.0-or-later")
+    default_license_url="https://www.gnu.org/licenses/lgpl+gpl-3.0.txt"
+    curl "https://www.gnu.org/licenses/gpl-3.0.txt" >COPYING
+    curl "https://www.gnu.org/licenses/lgpl-3.0-standalone.html" >COPYING.LESSER
+    ;;
+
+"Apache-2.0")
+    default_license_url="https://www.apache.org/licenses/LICENSE-2.0.txt"
+    curl "$default_license_url" >LICENSE
+    ;;
+
+"CC-BY-SA-4.0")
+    default_license_url="https://creativecommons.org/licenses/by-sa/4.0/legalcode.txt"
+    curl "$default_license_url" >LICENSE
+    ;;
+
+*)
+    default_license_url="file:///dev/null"
+    echo "    -> No license found for your identifier: '$SPDX_LICENSE_IDENTIFIER'"
+    ;;
+esac
+
+prompt LICENSE_URL "The url of the license" "$default_license_url" "dont_ask"
+
+echo "$DESCRIPTION" >.git/description
+
+while read -r var; do
+    var_name="${var%=*}"
+    var_value="${var#*=\"}"
+    var_value="${var_value%\"}"
+
+    fd . --hidden --type file --exec sed --in-place "s|%\bINIT_$var_name\b|$var_value|g"
+
+    # Replace the variable in file paths
+    fd "%INIT_$var_name" . --hidden | while read -r file_path; do
+        new_file_path="$(echo "$file_path" | sed "s|%INIT_$var_name|$var_value|g")"
+        mv "$file_path" "$new_file_path"
+    done
+done <"$replacement_file"
+
+# HACK: Re-add the executable permissions to files, which the nix template has somehow
+# removed <2024-04-02>
+chmod +x scripts/*
+chmod +x update.sh
+[ -f ./build.sh ] && chmod +x build.sh
+
+# vim: ft=sh
diff --git a/build/c/makefile b/build/c/makefile
new file mode 100644
index 0000000..63ca24c
--- /dev/null
+++ b/build/c/makefile
@@ -0,0 +1,66 @@
+PREFIX    := /usr/local
+BINPREFIX := $(DESTDIR)$(PREFIX)/bin
+MANPREFIX := $(DESTDIR)$(PREFIX)/share/man/man1
+
+BIN_NAME := %INIT_APPLICATION_NAME
+# This version is set automatically on `cog bump --auto`;
+BIN_VERSION := "v%INIT_APPLICATION_VERSION"  # GUIDING VERSION STRING
+
+# The trailing slash is important
+BUILD_DIR := ./target/
+BIN_PATH := $(BUILD_DIR)$(BIN_NAME)
+
+
+SRC := $(wildcard src/*.c)
+OBJ := $(SRC:.c=.o)
+DEP := $(OBJ:.o=.d)
+
+LIBS :=
+
+ALL_CFLAGS  := -O3 -MMD -Wall -Wextra -Wno-unused-parameter $(CFLAGS) $(CPPFLAGS)
+ALL_LDFLAGS := $(addprefix -l,$(LIBS)) -L $(LD_LIBRARY_PATH) $(LDFLAGS)
+
+default: all
+
+all: $(BIN_NAME)
+
+$(BIN_NAME): $(OBJ)
+	$(CC) $(addprefix $(BUILD_DIR),$(notdir $(OBJ))) -o $(addprefix $(BUILD_DIR),$(notdir $(BIN_NAME))) $(ALL_CFLAGS) $(ALL_LDFLAGS)
+
+$(OBJ): $(SRC)
+	mkdir --parents $(BUILD_DIR)
+	$(CC) -c $< -o $(addprefix $(BUILD_DIR),$(notdir $(OBJ))) $(ALL_CFLAGS)
+
+manual:
+	mkdir --parents $(BUILD_DIR)docs
+	pandoc "./docs/$(BIN_NAME).1.md" -s -t man > $(BUILD_DIR)docs/$(BIN_NAME).1
+
+.PHONY : clean options install memory_leak_test
+options:
+	@echo "PREFIX    = $(PREFIX)"
+	@echo "BINPREFIX = $(BINPREFIX)"
+	@echo "MANPREFIX = $(MANPREFIX)"
+	@echo ""
+	@echo "BIN_NAME = $(BIN_NAME)"
+	@echo "BUILD_DIR = $(BUILD_DIR)"
+	@echo "BIN_PATH = $(BIN_PATH)"
+	@echo ""
+	@echo "SRC = $(SRC)"
+	@echo "OBJ = $(OBJ)"
+	@echo "DEP = $(DEP)"
+	@echo ""
+	@echo "LIBS = $(LIBS)"
+	@echo ""
+	@echo "ALL_CFLAGS  = $(ALL_CFLAGS)"
+	@echo "ALL_LDFLAGS = $(ALL_LDFLAGS)"
+	@echo ""
+
+clean :
+	rm --recursive $(BUILD_DIR)
+
+install: $(BIN_NAME) manual
+	install -D $(BUILD_DIR)docs/$(BIN_NAME).1  $(MANPREFIX)/$(BIN_NAME);
+	install -D $(BUILD_DIR)$(BIN_NAME)  $(BINPREFIX)/$(BIN_NAME);
+
+memory_leak_test:
+	sh ./scripts/valgrind_test.sh $(BIN_NAME)
diff --git a/build/c/makefile.~1~ b/build/c/makefile.~1~
new file mode 100644
index 0000000..9352bdb
--- /dev/null
+++ b/build/c/makefile.~1~
@@ -0,0 +1,66 @@
+PREFIX    := /usr/local
+BINPREFIX := $(DESTDIR)$(PREFIX)/bin
+MANPREFIX := $(DESTDIR)$(PREFIX)/share/man/man1
+
+BIN_NAME := screenr_spotify
+# This version is set automatically on `cog bump --auto`;
+BIN_VERSION := "v0.1.0"  # GUIDING VERSION STRING
+
+# The trailing slash is important
+BUILD_DIR := ./target/
+BIN_PATH := $(BUILD_DIR)$(BIN_NAME)
+
+
+SRC := $(wildcard src/*.c)
+OBJ := $(addprefix $(BUILD_DIR),$(notdir $(SRC:.c=.o)))
+DEP := $(addprefix $(BUILD_DIR),$(notdir $(SRC:.c=.d)))
+
+LIBS :=
+
+ALL_CFLAGS  := -O3 -MMD -Wall -Wextra -Wno-unused-parameter $(CFLAGS) $(CPPFLAGS)
+ALL_LDFLAGS := $(addprefix -l,$(LIBS)) -L $(LD_LIBRARY_PATH) $(LDFLAGS)
+
+default: all
+
+all: $(BIN_NAME)
+
+$(BIN_NAME): $(OBJ)
+	$(CC) $^ -o $(addprefix $(BUILD_DIR),$(notdir $(BIN_NAME))) $(ALL_CFLAGS) $(ALL_LDFLAGS)
+
+$(OBJ): $(SRC)
+	@mkdir --parents $(BUILD_DIR)
+	$(CC) -c -o $@  $(addprefix ./src/,$(patsubst %.o,%.c,$(notdir $@))) $(ALL_CFLAGS)
+
+manual:
+	mkdir --parents $(BUILD_DIR)docs
+	pandoc "./docs/$(BIN_NAME).1.md" -s -t man > $(BUILD_DIR)docs/$(BIN_NAME).1
+
+.PHONY : clean options install memory_leak_test
+options:
+	@echo "PREFIX    = $(PREFIX)"
+	@echo "BINPREFIX = $(BINPREFIX)"
+	@echo "MANPREFIX = $(MANPREFIX)"
+	@echo ""
+	@echo "BIN_NAME = $(BIN_NAME)"
+	@echo "BUILD_DIR = $(BUILD_DIR)"
+	@echo "BIN_PATH = $(BIN_PATH)"
+	@echo ""
+	@echo "SRC = $(SRC)"
+	@echo "OBJ = $(OBJ)"
+	@echo "DEP = $(DEP)"
+	@echo ""
+	@echo "LIBS = $(LIBS)"
+	@echo ""
+	@echo "ALL_CFLAGS  = $(ALL_CFLAGS)"
+	@echo "ALL_LDFLAGS = $(ALL_LDFLAGS)"
+	@echo ""
+
+clean :
+	rm --recursive $(BUILD_DIR)
+
+install: $(BIN_NAME) manual
+	install -D $(BUILD_DIR)docs/$(BIN_NAME).1  $(MANPREFIX)/$(BIN_NAME);
+	install -D $(BUILD_DIR)$(BIN_NAME)  $(BINPREFIX)/$(BIN_NAME);
+
+memory_leak_test:
+	sh ./scripts/valgrind_test.sh $(BIN_NAME)
diff --git a/build/c/scripts/renew_copyright_header.sh b/build/c/scripts/renew_copyright_header.sh
new file mode 100755
index 0000000..423547f
--- /dev/null
+++ b/build/c/scripts/renew_copyright_header.sh
@@ -0,0 +1,92 @@
+#! /usr/bin/env sh
+
+# NOTE: This is the line length of the .licensure.yml header template **plus** the extra
+# line after the template comment.
+TEMPLATE_LINE_LENGTH=20
+LATEX_TEMPLATE_LINE_LENGTH=9
+
+PROJECT_ROOT="$(git rev-parse --show-toplevel)"
+
+remove() {
+    extension="$1"
+    file="$2"
+
+    # We need to differentiate, when removing the old copyright header, as some
+    # formatters do weird things to the file
+    case "$extension" in
+    # normal '#' comments (these are $TEMPLATE_LINE_LENGTH lines long)
+    "Makefile" | "makefile" | "toml" | "envrc" | "yml" | "gitignore" | "awk" | "pest" | "lua")
+        sed --in-place "1,${TEMPLATE_LINE_LENGTH}d" "$file"
+        ;;
+    # LaTeX files (or TeX files in general) have a different license, use the
+    # $LATEX_TEMPLATE_LINE_LENGTH variable.
+    "tex")
+        sed --in-place "1,${LATEX_TEMPLATE_LINE_LENGTH}d" "$file"
+        ;;
+    # normal '/* ... */' like comments (these are $TEMPLATE_LINE_LENGTH + 2 lines long)
+    "c" | "h" | "md" | "rs" | "html" | "svg" | "drawio" | "tri")
+        length="$((TEMPLATE_LINE_LENGTH + 2))"
+        sed --in-place "1,${length}d;" "$file"
+        ;;
+    # alejandra (the nix formatter) removes the blank line after the comment,
+    # thus only $TEMPLATE_LINE_LENGTH - 1 lines
+    "nix")
+        length="$((TEMPLATE_LINE_LENGTH - 1))"
+        sed --in-place "1,${length}d;" "$file"
+        ;;
+    # Shell needs a shebang on the first line, only after the first line can we
+    # remove the $TEMPLATE_LINE_LENGTH lines
+    "sh")
+        sed --in-place "2,${TEMPLATE_LINE_LENGTH}d;" "$file"
+        licensure --in-place "$file"
+
+        TEMPLATE_LINE_LENGTH_NEW="$(($(yq --raw-output '.licenses | map(.template) | join("")' "$PROJECT_ROOT/.licensure.yml" | wc -l) + $(yq '.comments | last | .commenter.trailing_lines' "$PROJECT_ROOT/.licensure.yml")))"
+
+        # delete the current shebang
+        to="$((TEMPLATE_LINE_LENGTH_NEW + 1))"
+        sed --in-place "${TEMPLATE_LINE_LENGTH_NEW},${to}d;" "$file"
+
+        # add a new one
+        sed --in-place "1i#! /usr/bin/env sh" "$file"
+        ;;
+    *)
+        echo "File '$file' with extension '$extension' is not know yet, please add it!"
+        ;;
+    esac
+}
+
+list() {
+    echo "$extension -> $file"
+}
+
+if [ -f "$1" ]; then
+    file="$(realpath "$1")"
+    filename="$(basename -- "$file")"
+    extension="${filename##*.}"
+    filename="${filename%.*}"
+
+    if [ -n "$DRY_RUN" ]; then
+        list "$extension" "$file"
+    else
+        remove "$extension" "$file"
+    fi
+else
+    fd --type file --hidden . | while read -r file; do
+        if grep --quiet 'SPDX-License-Identifier' "$file"; then
+            filename="$(basename -- "$file")"
+            extension="${filename##*.}"
+            filename="${filename%.*}"
+
+            if [ -n "$DRY_RUN" ]; then
+                list "$extension" "$file"
+            else
+                remove "$extension" "$file"
+            fi
+        fi
+    done
+
+    if [ -z "$DRY_RUN" ]; then
+        licensure --in-place --project
+        nix fmt
+    fi
+fi
diff --git a/build/c/scripts/valgrind_test.sh b/build/c/scripts/valgrind_test.sh
new file mode 100755
index 0000000..4d0d964
--- /dev/null
+++ b/build/c/scripts/valgrind_test.sh
@@ -0,0 +1,29 @@
+#! /usr/bin/env sh
+
+for arg in "$@"; do
+    case "$arg" in
+    "--help" | "-h")
+        cat <<-EOF
+            valgrind_test.sh [BINARY_NAME] [ARGS_FOR_BINARY..]
+EOF
+        exit 0
+        ;;
+    esac
+done
+
+binary_name="${1-main}"
+[ -n "$1" ] && shift 1
+
+log_file="$(git rev-parse --show-toplevel)/target/valgrind_out.report"
+mkdir --parents "$(dirname "$log_file")"
+
+CFLAGS="-ggdb3" make "$binary_name"
+
+valgrind --leak-check=full \
+    --show-leak-kinds=all \
+    --show-error-list=yes \
+    --track-origins=yes \
+    --log-file="$log_file" \
+    "./target/$binary_name" "$@"
+
+cat "$log_file"
diff --git a/build/c/shell_line_editor.sh b/build/c/shell_line_editor.sh
new file mode 100644
index 0000000..8d6833a
--- /dev/null
+++ b/build/c/shell_line_editor.sh
@@ -0,0 +1,247 @@
+#! /usr/bin/env sh
+# Taken in verbatim from: https://unix.stackexchange.com/a/113450, and somewhat changed
+
+LE_print_debug() {
+    LE_debug="$1"
+    LE_debug_msg="$2"
+    [ -n "$LE_debug" ] && printf "\nDBG: (%s)\n" "$LE_debug_msg" >outfile.debug
+}
+
+LE() {
+    # Shell Line Editor. Extremely slow and stupid code. However it
+    # should work on ansi/vt100/linux derived terminals on POSIX
+    # systems.
+    # Understands some emacs key bindings: CTRL-(A,B,D,E,F,H,K,L)
+    # plus the CTRL-W and CTRL-U normal killword and kill.
+    # no Meta-X key, but handling of <Left>, <Right>, <Home>, <End>
+    # <Suppr>.
+    #
+    # Args:
+    #  [1]: prompt (\x sequences recognized, defaults to "")
+    #  [2]: max input length (unlimited if < 0, (default))
+    #  [3]: fill character when erasing (defaults to space)
+    #  [4]: initial value.
+    #  [5]: whether to output debugfiles (outfile.debug and outfile.raw.debug)
+    # Returns:
+    #  0: OK
+    #  1: od(d) error or CTRL-C hit
+
+    LE_prompt="$1"
+    LE_max=${2--1}
+    LE_fill=${3-" "}
+    LE_debug="$5"
+
+    LE_backward() {
+        LE_substract="$1"
+        while [ -n "$LE_substract" ]; do
+            printf '\b%s' "$2"
+            LE_substract=${LE_substract%?}
+        done
+    }
+
+    LE_fill() {
+        LE_substract="$1"
+        while [ -n "$LE_substract" ]; do
+            printf '%s' "$LE_fill"
+            LE_substract=${LE_substract%?}
+        done
+    }
+
+    # Used but not right now
+    # shellcheck disable=2016
+    LE_restore='stty "$LE_tty"
+              LC_COLLATE='${LC_COLLATE-"; unset LC_COLLATE"}
+
+    # LE_tty is used in the restore above
+    # shellcheck disable=2034
+    LE_ret=1 LE_tty=$(stty -g) LC_COLLATE=C
+
+    # text on the right of the cursor
+    LE_left=$4
+    # text on the left of the cursor
+    LE_right=''
+
+    # Tell the terminal to show us every char inputted
+    stty -icanon -echo -isig min 3 time 1 -istrip
+    printf '%b%s' "$LE_prompt" "$LE_left"
+
+    # clear the output
+    [ -n "$LE_debug" ] && printf "" >outfile.debug
+    [ -n "$LE_debug" ] && printf "" >outfile.raw.debug
+
+    # The value needs to be split for it to work (and it's either way just numbers)
+    # shellcheck disable=2046
+    while set -- $(dd bs=3 count=1 2>/dev/null | od -vAn -to1); do
+        while [ "$#" -gt 0 ]; do
+            [ -n "$LE_debug" ] && printf "%b" "\0$1" >>outfile.debug
+            [ -n "$LE_debug" ] && printf "%s " "$1" >>outfile.raw.debug
+            LE_current_key=$1
+            shift
+
+            # 033 is ^[ (`printf "\\$1\n" | cat -v`)
+            if [ "$LE_current_key" = 033 ]; then
+                case "$1$2$3" in
+                # [ C | O C -> ^F forward
+                133103* | 117103*)
+                    shift 2
+                    LE_current_key=006
+                    ;;
+                # [ D | O D -> ^B backward
+                133104* | 117104*)
+                    shift 2
+                    LE_current_key=002
+                    ;;
+                # [ H | O H -> ^A beginning of line
+                133110* | 117110*)
+                    shift 2
+                    LE_current_key=001
+                    ;;
+                # [ P | O P -> ^D del char
+                133120* | 117120*)
+                    shift 2
+                    LE_current_key=004
+                    ;;
+                # [ F | O F -> ^E end of line
+                133106* | 117106*)
+                    shift 2
+                    LE_current_key=005
+                    ;;
+                # [ 1 ~ -> ^A beginning of line
+                133061176)
+                    shift 3
+                    LE_current_key=001
+                    ;;
+                # [ 4 ~ -> ^E end of line
+                133064176)
+                    shift 3
+                    LE_current_key=005
+                    ;;
+                # [ 3 ~ -> ^D del char
+                133063176)
+                    shift 3
+                    LE_current_key=004
+                    ;;
+                # [ | O
+                133* | 117*)
+                    shift
+                    # Is $1 in ge 0 AND le 9 OR eq ';'?
+                    # These are control sequences for things like colors; Ignore them
+                    while [ "0$1" -ge 060 ] && [ "0$1" -le 071 ] ||
+                        [ "0$1" -eq 073 ]; do
+                        shift
+                    done
+                    ;;
+                esac
+            fi
+
+            case "$LE_current_key" in
+            001) # ^A beginning of line
+                LE_backward "$LE_left"
+                LE_right="$LE_left$LE_right"
+                LE_left=
+                ;;
+            002) # ^B backward
+                if [ "$LE_left" = "" ]; then
+                    # bell
+                    printf '\a'
+                    LE_print_debug "$LE_debug" "backward with empty left"
+                else
+                    printf '\b'
+                    LE_tmp="${LE_left%?}"
+                    LE_right="${LE_left#"$LE_tmp"}$LE_right"
+                    LE_left="$LE_tmp"
+                fi ;;
+            003) # CTRL-C
+                break 2 ;;
+            004) # ^D del char
+                if [ "$LE_right" = "" ]; then
+                    # bell (tell the user that the line is empty)
+                    printf '\a'
+                    LE_print_debug "$LE_debug" "delete with empty right"
+                else
+                    LE_right="${LE_right#?}"
+                    printf '%s\b' "$LE_right$LE_fill"
+                    LE_backward "$LE_right"
+                fi ;;
+            012 | 015) # NL or CR
+                LE_ret=0
+                break 2
+                ;;
+            005) # ^E end of line
+                printf '%s' "$LE_right"
+                LE_left="$LE_left$LE_right"
+                LE_right=
+                ;;
+            006) # ^F forward
+                if [ "$LE_right" = "" ]; then
+                    # bell (tell the user that the line is empty)
+                    printf '\a'
+                    LE_print_debug "$LE_debug" "forward with empty right"
+                else
+                    LE_tmp="${LE_right#?}"
+                    LE_left="$LE_left${LE_right%"$LE_tmp"}"
+                    printf %s "${LE_right%"$LE_tmp"}"
+                    LE_right="$LE_tmp"
+                fi ;;
+            010 | 177) # backspace or del
+                if [ "$LE_left" = "" ]; then
+                    # bell
+                    printf '\a'
+                    LE_print_debug "$LE_debug" "backspace with empty left"
+                else
+                    printf '\b%s\b' "$LE_right$LE_fill"
+                    LE_backward "$LE_right"
+                    LE_left="${LE_left%?}"
+                fi ;;
+            013) # ^K kill to end of line
+                LE_fill "$LE_right"
+                LE_backward "$LE_right"
+                LE_right=""
+                ;;
+            014) # ^L redraw
+                printf '\r%b%s' "$LE_prompt" "$LE_left$LE_right"
+                LE_backward "$LE_right"
+                ;;
+            025) # ^U kill line
+                LE_backward "$LE_left"
+                LE_fill "$LE_left$LE_right"
+                LE_backward "$LE_left$LE_right"
+                LE_left=""
+                LE_right=""
+                ;;
+            027) # ^W kill word
+                if [ "$LE_left" = "" ]; then
+                    # bell
+                    printf '\a'
+                else
+                    LE_tmp="${LE_left% *}"
+                    LE_backward "${LE_left#"$LE_tmp"}"
+                    LE_fill "${LE_left#"$LE_tmp"}"
+                    LE_backward "${LE_left#"$LE_tmp"}"
+                    LE_left="$LE_tmp"
+                fi ;;
+            # Print the received key, as it did not match a special key
+            [02][4-7]? | [13]??) # 040 -> 177, 240 -> 377
+                # was assuming iso8859-x at the time
+                if [ "$LE_max" -gt 0 ] && LE_tmp="$LE_left$LE_right" &&
+                    [ "${#LE_tmp}" -eq "$LE_max" ]; then
+                    # bell, when the user is trying to cross the line limit
+                    printf '\a'
+                    LE_print_debug "$LE_debug" "max output reached"
+                else
+                    LE_left="$LE_left$(printf '%b' "\0$LE_current_key")"
+                    printf '%b%s' "\0$LE_current_key" "$LE_right"
+                    LE_backward "$LE_right"
+                fi ;;
+            *)
+                LE_print_debug "$LE_debug" "key not recognized: $(printf "%b" "\0$LE_current_key")"
+                printf '\a'
+                ;;
+            esac
+        done
+    done
+    eval "$LE_restore"
+    REPLY=$LE_left$LE_right
+    echo
+    return "$LE_ret"
+}
diff --git a/build/c/src/main.c b/build/c/src/main.c
new file mode 100644
index 0000000..f8d8fb7
--- /dev/null
+++ b/build/c/src/main.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main ()
+{
+  printf ("Hello World!\n");
+
+  return EXIT_SUCCESS;
+}
diff --git a/build/c/treefmt.nix b/build/c/treefmt.nix
new file mode 100644
index 0000000..794e8fc
--- /dev/null
+++ b/build/c/treefmt.nix
@@ -0,0 +1,70 @@
+{
+  treefmt-nix,
+  pkgs,
+}:
+treefmt-nix.lib.evalModule pkgs (
+  {pkgs, ...}: {
+    # Used to find the project root
+    projectRootFile = "flake.nix";
+
+    programs = {
+      alejandra.enable = true;
+      rustfmt.enable = true;
+      clang-format.enable = true;
+      mdformat.enable = true;
+      shfmt = {
+        enable = true;
+        indent_size = 4;
+      };
+      shellcheck.enable = true;
+      prettier = {
+        enable = true;
+        settings = {
+          arrowParens = "always";
+          bracketSameLine = false;
+          bracketSpacing = true;
+          editorconfig = true;
+          embeddedLanguageFormatting = "auto";
+          endOfLine = "lf";
+          # experimentalTernaries = false;
+          htmlWhitespaceSensitivity = "css";
+          insertPragma = false;
+          jsxSingleQuote = true;
+          printWidth = 80;
+          proseWrap = "always";
+          quoteProps = "consistent";
+          requirePragma = false;
+          semi = true;
+          singleAttributePerLine = true;
+          singleQuote = false;
+          trailingComma = "all";
+          useTabs = false;
+          vueIndentScriptAndStyle = false;
+
+          tabWidth = 2;
+        };
+      };
+      stylua.enable = true;
+      ruff = {
+        enable = true;
+        format = true;
+      };
+      taplo.enable = true;
+    };
+
+    settings = {
+      global.excludes = [
+        "CHANGELOG.md"
+        "NEWS.md"
+      ];
+      formatter = {
+        clang-format = {
+          options = ["--style" "GNU"];
+        };
+        shfmt = {
+          includes = ["*.bash"];
+        };
+      };
+    };
+  }
+)
diff --git a/build/c/update.sh b/build/c/update.sh
new file mode 100755
index 0000000..49216b8
--- /dev/null
+++ b/build/c/update.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+
+nix flake update