#+TITLE: Carbs Linux User Manual
#+AUTHOR: Cem Keylan
#+TEXINFO_FILENAME: carbslinux.info
#+TEXINFO_DIR_CATEGORY: System Administration
#+TEXINFO_DIR_TITLE: Carbs Linux: (carbslinux)
#+TEXINFO_DIR_DESC: Carbs Linux User Manual
#+OPTIONS: html-postamble:nil html-scripts:nil

#+BEGIN_COMMENT
This is the documentation source for Carbs Linux in Org-mode. The macros below
are used for assigning IDs to contribution guidelines.
#+END_COMMENT
#+MACRO: contid [@@texinfo:@anchor{$1}@@$1]
#+MACRO: sectid $2 [@@texinfo:@anchor{$1}@@$1]

This is the full documentation of [[https://carbslinux.org][Carbs Linux]], from the details of the
distribution, installation, to the package manager. It is not yet complete.

#+BEGIN_EXPORT ascii
You can build and install the 'info' package in order to view this documentation
with the info reader. It is divided into sections and easier to read.
#+END_EXPORT

#+BEGIN_EXPORT texinfo
@ifplaintext
You can build and install the @command{info} package in order to view this
documentation with the info reader. It is divided into sections and easier to
read.
@end ifplaintext

@ifhtml
This documentation is also available in the distribution by the
@command{carbs-docs} package, which can be read by either running
@code{info carbslinux} or reading @file{/usr/share/doc/carbslinux.txt} with your
favorite pager. You can install either the @command{info} or @command{texinfo}
for doing the first.
@end ifhtml
#+END_EXPORT

* Table of Contents                                       :toc_3_gh:noexport:
- [[#copying][Copying]]
- [[#installation][Installation]]
  - [[#preparing-environment][Preparing Environment]]
    - [[#download][Download]]
    - [[#signature-verification][Signature verification]]
    - [[#extracting-the-tarball][Extracting the tarball]]
  - [[#chroot][Chroot]]
    - [[#setting-up-repositories][Setting up repositories]]
    - [[#updating-packages][Updating packages]]
    - [[#installing-packages][Installing packages]]
    - [[#essential-software][Essential Software]]
    - [[#obtaining-the-documentation][Obtaining the documentation]]
  - [[#system-configuration][System Configuration]]
    - [[#configuring-hostname][Configuring hostname]]
    - [[#hosts-file][Hosts file]]
  - [[#kernel][Kernel]]
    - [[#obtaining-the-kernel-sources][Obtaining the kernel sources]]
    - [[#kernel-dependencies][Kernel dependencies]]
    - [[#building-the-kernel][Building the kernel]]
  - [[#making-your-system-bootable][Making your system bootable]]
    - [[#bootloader][Bootloader]]
    - [[#init-scripts][Init scripts]]
    - [[#fstab][Fstab]]
  - [[#post-installation][Post-installation]]
    - [[#irc][IRC]]
    - [[#kiss-repositories][KISS repositories]]
- [[#software][Software]]
  - [[#init-system][Init System]]
    - [[#configuring-init][Configuring Init]]
    - [[#changing-init-program][Changing Init Program]]
  - [[#display-systems][Display Systems]]
    - [[#wayland][Wayland]]
- [[#contribution-guidelines][Contribution Guidelines]]
  - [[#conventions][Conventions]]
    - [[#shell-conventions][Shell Conventions]]
    - [[#repository-conventions][Repository Conventions]]
- [[#gnu-free-documentation-license][GNU Free Documentation License]]

* Copying
  :PROPERTIES:
  :COPYING:  t
  :END:

Copyright \copy 2020 Cem Keylan

#+BEGIN_QUOTE
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, with 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_QUOTE

* Installation
:PROPERTIES:
:DESCRIPTION: Installing Carbs Linux
:EXPORT_FILE_NAME: install.txt
:EXPORT_TITLE: Carbs Linux Installation Guide
:END:

#+NAME: pubkey
#+begin_src sh :exports none
PUBKEY=carbslinux-2021.08.pub
#+end_src

These are the step-by-step instructions for installing Carbs Linux. It can be
acquired as plain-text to be viewed offline with a pager from
[[https://carbslinux.org/install.txt]].

#+begin_src sh
curl -sL https://carbslinux.org/install.txt | less
#+end_src

#+TOC: headlines 3 local
** Preparing Environment
:PROPERTIES:
:DESCRIPTION: Getting ready to chroot
:END:

To install Carbs Linux, you will need a Live Linux ISO. For that purpose, you
can obtain a Gentoo or Void Linux live image. You can follow their instructions
to boot and setup your network.

You will need the following programs in order to install Carbs Linux:

- tar
- wget
- xz
- some form of base utilities (coreutils, sbase, busybox, etc.)

Rest of these instructions will assume that you have set all of these up, and
will continue on that point.

*** Download
:PROPERTIES:
:DESCRIPTION: Download the root filesystem tarball
:END:

First, we need to download the rootfs tarball. You can do the following in order
to obtain the rootfs. If you are using an i686 machine, replace the =x86_64=
with =i686=. We are setting this in a URL variable so that we don't have to
write it every time.

#+BEGIN_SRC sh
URL=https://dl.carbslinux.org/releases/x86_64
wget $URL/carbs-rootfs.tar.xz.sha256
sha256sum -c carbs-rootfs.tar.xz.sha256
#+END_SRC

*** Signature verification
:PROPERTIES:
:DESCRIPTION: Verify the signature of the rootfs tarball
:END:

It is highly recommended to verify the signature of the tarball. You will need
the OpenBSD tool =signify(1)= for this. Many distributions provide a package for
it, if you are using a Carbs Linux host, you can also install the package
=otools= which provides =signify=. Download the signature first.

#+BEGIN_SRC sh
wget $URL/carbs-rootfs.tar.xz.sig
#+END_SRC

The signature file should say something similar to

#+begin_src sh :exports results :results verbatim
curl -L https://dl.carbslinux.org/releases/x86_64/carbs-rootfs.tar.xz.sig
#+end_src

#+RESULTS:
: untrusted comment: verify with carbslinux-2021.08.pub
: RWTK4GFDD7JiohUHBeJXuKw+/P3K4ZRR8jQud0iOxNDbn7WCFxQsxt9FUNSEiXfLjkm1Ez8c3esRG8oydrsFUFpBGtekFt5obgo=

Grab the key (which probably should be the latest one) that is written on the
file from [[https://dl.carbslinux.org/keys/]] so you can verify the signature. The
latest Signify public key is also available on the [[https://git.carbslinux.org/repository][package repository]], so you can
check the validity of the public key from multiple locations, or just copy paste
that portion to a file and use that instead.

#+begin_src sh :noweb yes
<<pubkey>>
wget https://dl.carbslinux.org/keys/$PUBKEY
#+end_src

You can now verify the distribution tarball with signify.

#+begin_src sh
signify -V -m carbs-rootfs.tar.xz -p $PUBKEY
#+end_src

If everything went alright, this should output:

#+begin_example
Signature Verified
#+end_example



*** Extracting the tarball
:PROPERTIES:
:DESCRIPTION: Extracting the root filesystem to the desired location
:END:

You will need to extract the tarball to your desired location. For partitioning,
you can follow [[https://wiki.archlinux.org/index.php/Partitioning][this guide]]. This will assume that you will be mounting your root
partition to =/mnt=.

#+BEGIN_SRC sh
mount /dev/sdx1 /mnt
tar xf carbs-rootfs.tar.xz -C /mnt
#+END_SRC

** Chroot
:PROPERTIES:
:DESCRIPTION: Going inside your new system
:END:

Chroot into Carbs Linux by running the chroot helper inside the rootfs!

#+BEGIN_SRC sh
/mnt/bin/cpt-chroot /mnt
#+END_SRC

*** Setting up repositories
:PROPERTIES:
:DESCRIPTION: Basic setup for obtaining repositories
:END:

Newest tarballs do not come with repositories, so you will need to manually
obtain them, and set your =CPT_PATH= environment variable. Carbs Linux
repositories can either be obtained by =git= or =rsync=. While rsync
repositories are overall faster and smaller, git offers the whole history of the
repository and a means to manipulate your repository as you like it. If you want
to obtain the git repository, you will need to install =git= itself.

The following guide will assume that you put the repositories into =~/repos/=
directory, but you can put the repositories into any directory you want. So go
ahead and create that directory:

#+BEGIN_SRC sh
mkdir -p $HOME/repos
#+END_SRC

**** Obtaining from git

Carbs Linux git repositories can be found both from the main server and GitHub
(mirror). Here are both their repository links. You can clone any of them.

- https://git.carbslinux.org/repository
- https://git.sr.ht/~carbslinux/repository

#+BEGIN_SRC sh
git clone git://git.carbslinux.org/repository $HOME/repos/carbs
#+END_SRC

**** Obtaining from rsync

Carbs Linux rsync repositories live in rsync://carbslinux.org/repo. In
order to obtain it, run the following:

#+BEGIN_SRC sh
rsync -avc rsync://carbslinux.org/repo $HOME/repos/carbs
#+END_SRC

**** Making the package manager use the repositories

In your shell's configuration file, or in your =~/.profile= file, add the
following lines:

#+BEGIN_SRC sh
CPT_PATH=$HOME/repos/carbs/core
CPT_PATH=$CPT_PATH:$HOME/repos/carbs/extra
CPT_PATH=$CPT_PATH:$HOME/repos/carbs/xorg
CPT_PATH=$CPT_PATH:$HOME/repos/carbs/community
export CPT_PATH
#+END_SRC

*** Updating packages
:PROPERTIES:
:DESCRIPTION: Update your system
:END:

It is good practice to make sure your system is up to date, especially before
building new packages. If there is an update for the package manager you will
need to update twice.

#+BEGIN_SRC sh
cpt-update && cpt-update
#+END_SRC

*** Installing packages
:PROPERTIES:
:DESCRIPTION: Install new software on your system
:END:

Since you are operating on a really small base, you might need to build and
install new programs to extend the functionality of your system. In order to
build and install packages new packages in Carbs, you need to execute the
following. "Package" is not actually a package and is given as an example.

#+BEGIN_SRC sh
cpt-build   package
cpt-install package
#+END_SRC

*** Essential Software
:PROPERTIES:
:DESCRIPTION: Software you might want to include on your system
:END:

Here is a small list of software that you might want to have on your system as
you are setting up. You might want to check the *Software* section in the full
documentation to learn more about other packaged software.

*BOOTLOADERS*

- efibootmgr
- grub

*FILESYSTEMS*

- e2fsprogs
- dosfstools
- ntfs-3g

*NETWORKING*

- dhcpcd
- wpa_supplicant

*TEXT EDITORS*

- nano
- vim

*DOCUMENTATION*

- carbs-docs
- man-pages
- man-pages-posix

*** Obtaining the documentation
:PROPERTIES:
:DESCRIPTION: Install documentation for offline use (optional)
:END:

All the documentation for Carbs Linux can be found on a single info manual to be
viewed offline. You can obtain either =texinfo= or the =info= packages in order
to view the documentation.

#+BEGIN_SRC sh
# Install the documentation.
cpt b carbs-docs && cpt i carbs-docs

# Install either texinfo or the info package. We will be installing standalone info
# as it doesn't need perl.
cpt b info && cpt i info

# You can then run info and navigate through the documentation.
info carbslinux
#+END_SRC

** System Configuration
:PROPERTIES:
:DESCRIPTION: Customizing your system for personal use
:END:

After you have finished installing some extra packages, you can configure your
system to your liking.

*** Configuring hostname
:PROPERTIES:
:DESCRIPTION: Setting up system hostname (recommended)
:END:

You might want to add a hostname, especially in a networked environment. Your
hostname will default to 'carbslinux' unless you set this.

#+BEGIN_SRC sh
echo your-hostname > /etc/hostname
#+END_SRC

*** Hosts file
:PROPERTIES:
:DESCRIPTION: Setting up hosts file for networking (optional)
:END:

You can edit your /etc/hosts file, which is the static lookup table for host
names. By default, there are two entries for localhost which are OKAY. You can
replace the 'localhost' part of these entries to your hostname.

#+BEGIN_EXAMPLE
  127.0.0.1  localhost.localdomain localhost
  ::1        localhost.localdomain localhost ip6-localhost
#+END_EXAMPLE

** Kernel
:PROPERTIES:
:DESCRIPTION: Compiling your own kernel
:END:

Kernel isn't managed under the main repositories, even though you could package
one for your personal use. Here is an [[https://github.com/cemkeylan/kiss-repository/tree/master/personal/linux][example kernel package]], which you will
need to reconfigure for your specific setup if you want to make use of it.

*** Obtaining the kernel sources
:PROPERTIES:
:DESCRIPTION: Downloading the Linux source code
:END:

You can visit the [[https://kernel.org]] website to choose a kernel that you want
to install. Though only the latest stable and longterm (LTS) versions are
supported.

#+BEGIN_SRC sh
# Download the kernel and extract it
wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.9.1.tar.xz
tar xf linux-5.9.1.tar.xz

# Change directory into the kernel sources
cd linux-5.9.1
#+END_SRC

*** Kernel dependencies
:PROPERTIES:
:DESCRIPTION: Requirements for building the kernel
:END:

In order to compile the kernel you will need to install some dependencies. You
will need =libelf=, and =bison= to compile the kernel. If you want to configure
using the menu interface you will also need =ncurses=.

#+BEGIN_SRC sh
# The package manager asks to install if you are building more than one package,
# so no need to run 'cpt i ...'
cpt b libelf ncurses
#+END_SRC

In the vanilla kernel sources, you need perl to compile the kernel, but it can
be easily patched out. You will need to apply the following patch. Patch was
written by [[https://github.com/E5ten][E5ten]]. You will need to obtain and apply the patch in the kernel
source directory.

#+BEGIN_SRC sh
wget https://dl.carbslinux.org/distfiles/kernel-no-perl.patch
patch -p1 < kernel-no-perl.patch
#+END_SRC

*** Building the kernel
:PROPERTIES:
:DESCRIPTION: Configure and compile the kernel
:END:

Next step is configuring and building the kernel. You can check Gentoo's
[[https://wiki.gentoo.org/wiki/Kernel/Configuration][kernel configuration guide]] to learn more about the matter. Overall, Gentoo Wiki
is a good place to learn about configuration according to your hardware. The
following will assume a monolithic kernel.

#+BEGIN_SRC sh
make menuconfig
make
install -Dm755 $(make -s image_name) /boot/vmlinuz-linux
#+END_SRC

** Making your system bootable
:PROPERTIES:
:DESCRIPTION: Installing bootloader and boot scripts
:END:

In order to be able to boot your fresh system, wou will need an init-daemon,
init-scripts and a bootloader. The init daemon is already provided by busybox,
but you can optionally change it.

*** Bootloader
:PROPERTIES:
:DESCRIPTION: Install a bootloader for your system
:END:

In the main repository, there is efibootmgr and grub to serve as bootloaders.
efibootmgr can be used as a standalone bootloader, or can be used to install
grub in a UEFI environment. efibootmgr is needed unless you are using a device
without UEFI support (or you really want to use BIOS for a reason).

**** GRUB BIOS installation

#+BEGIN_SRC sh
cpt b grub && cpt i grub
grub-install --target=i386-pc /dev/sdX
grub-mkconfig -o /boot/grub/grub.cfg
#+END_SRC

**** GRUB UEFI installation

#+BEGIN_SRC sh
cpt b efibootmgr && cpt i efibootmgr
cpt b grub && cpt i grub

grub-install --target=x86_64-efi \
             --efi-directory=esp \
             --bootloader-id=CarbsLinux

grub-mkconfig -o /boot/grub/grub.cfg
#+END_SRC

*** Init scripts
:PROPERTIES:
:DESCRIPTION: Install init scripts for your system
:END:

Only thing left to do is installing the init-scripts, and now you are almost
ready to boot your system!

#+BEGIN_SRC sh
cpt b carbs-init && cpt i carbs-init
#+END_SRC

*** Fstab
:PROPERTIES:
:DESCRIPTION: Generating fstab
:END:

You can now manually edit your fstab entry, or you can use the genfstab tool.
If you want to use the tool, exit the chroot and run the following:

#+BEGIN_SRC sh
wget https://github.com/cemkeylan/genfstab/raw/master/genfstab
chmod +x genfstab
./genfstab -U /mnt >> /mnt/etc/fstab
#+END_SRC

** Post-installation
:PROPERTIES:
:DESCRIPTION: Post-installation tasks
:END:

The base installation is now complete, you can now fine tune your system
according to your needs. Rest of these instructions are completely optional.
You can check the rest of the documentation to learn more about the system.

*** IRC
:PROPERTIES:
:DESCRIPTION: Joining the IRC channel
:END:

The IRC channel for Carbs Linux is located in =#carbslinux= on [[https://libera.chat][libera.chat]]. You
can install the =catgirl= package from the repository, or use a client of your
preference to join. Feel free to ask for help, or have a general chat.

*** KISS repositories
:PROPERTIES:
:DESCRIPTION: Acquire kiss repositories
:END:

There have been recent changes to the =kiss= package manager that breaks
compatibility with =cpt=. These changes throw away the entire premise of their
"static" packaging system. =cpt= will never implement those changes, so don't
expect any KISS package that was changed during or after July 2021 to work with
=cpt=.

* Software
:PROPERTIES:
:DESCRIPTION: Details on configuring your system's software
:END:

The distribution aims to package essential and useful software needed in a
practical system. If the repository lacks a package that you use, you may also
easily package it yourself or request it to be added to the default repositories
over on the IRC channel (=#carbslinux= on [[https://libera.chat][Libera]]).

This section goes over the details of some packaged software

** Init System
:PROPERTIES:
:DESCRIPTION: Configure the init system
:END:

Carbs Linux init scripts are run by the init daemon (=busybox= by default) on
boot and shutdown processes. It also provides its own halting program named
shalt. This provides a portable method that doesn't rely on non-POSIX external
programs.

*** Configuring Init
:PROPERTIES:
:DESCRIPTION: Ways to configure the init system
:END:

There are three ways you can change the behaviour of the init system. Those are:

- Kernel Command Line
- =/etc/init/rc.conf= file
- Init Hooks

**** Kernel Command Line
:PROPERTIES:
:DESCRIPTION: Configure init through the boot parameters
:END:

On GRUB, you can edit the kernel command line parameters, which will be parsed
as variables on the init system. Not all of the parameters will be acted upon,
but all of them will be set as variables on the init script. For example an
example command line, and how it is interpreted.

#+BEGIN_EXAMPLE
BOOT_IMAGE=/boot/vmlinuz root=/dev/sda2 rw loglevel=3 quiet
#+END_EXAMPLE

This command line will be parsed to set the following variables:

#+BEGIN_EXAMPLE
BOOT_IMAGE=/boot/vmlinuz
root=/dev/sda2
rw=1
loglevel=3
quiet=1
#+END_EXAMPLE

Some of these variables, such as =rw=/=ro=, =loglevel=, and =quiet=, will be
used by the init system to change the behaviour of the startup.

**** =/etc/init/rc.conf= file
:PROPERTIES:
:DESCRIPTION: Configure init through the configuration file
:END:

However, the kernel command line isn't the only place to set your boot
parameters. You can specify variables here as well, although note that the
kernel command line always gets the priority for these variables since they can
be set just before boot.

**** Init Hooks
:PROPERTIES:
:DESCRIPTION: Configure init through hooks
:END:

Init hooks are for custom personal commands that the user may want to add to
alter their boot. These can be used to load kernel modules, modify interfaces,
and lot more. Those hooks are added to the =/etc/init= directory with the
hook name as the suffix. For example, a boot script will be placed as
=/etc/init/my-hook.boot=. Currently, there are 4 hooks that the user can use.

- early-boot :: Run after pseudo-filesystems are mounted.
- boot :: Run before the boot stage is completed.
- pre.shutdown :: Run first when shutting down.
- umount :: Run just before filesystems are unmounted.
- post.shutdown :: Run just before the system is halted.

*** Changing Init Program
:PROPERTIES:
:DESCRIPTION: Replace the default busybox init with something new
:END:

By default, Carbs Linux comes preinstalled with =busybox-init=, but this can
easily be replaced without any issues. Currently, available init systems are:

- =sinit=
- =busybox= init
- =runit=
- =shinit=

This example is for runit, but it will work with all init systems packaged in the
distribution repositories. See the =cpt-alternatives(1)= manual page for more
details.

#+BEGIN_SRC sh
cpt a runit /usr/bin/init
cpt a runit /usr/bin/poweroff
cpt a runit /usr/bin/reboot
#+END_SRC

**** Rebooting after changing init
:PROPERTIES:
:DESCRIPTION: Ways to reboot after replacing the init system
:END:

After switching init systems, your running init system may not accept the
new poweroff commands. You will need to reboot/poweroff using the running init's
utilities for the new utilities to work. These commands are for the init system
currently running on your system and not the one you are switching to.

| Program      | Command          |
|--------------+------------------|
| busybox      | =busybox reboot= |
| runit        | =runit-init 6=   |
| shinit/sinit | =kill -s INT 1=  |

** TODO Display Systems

Carbs Linux supports both Xorg and Wayland in the distribution repositories.
This section serves as a guide to set up your preferred display server. Follow
the subsection for the display server you want to setup.

*** Wayland

Wayland is a modern display server protocol intended as a replacement for Xorg.
Wayland has a much simpler architecture compared to X by its careful design and
implementation. Users who want to use a Wayland compositor should follow this
section.

**** Enabling the Wayland repository

The =wayland= repository requires packages from =xorg= and =extra= repositories.
So you should set your =$CPT_PATH= so that =core= and =extra= repositories
precede the =wayland= repository, and the =xorg= repository should come after
=wayland=. Here is an example below, where =$REPOSITORY= points to the root of
your repository.

#+begin_src sh
CPT_PATH=$REPOSITORY/core
CPT_PATH=$CPT_PATH:$REPOSITORY/extra
CPT_PATH=$CPT_PATH:$REPOSITORY/wayland
CPT_PATH=$CPT_PATH:$REPOSITORY/xorg
export CPT_PATH
#+end_src

After you have enabled your repositories, go ahead and install =wayland= and
=wayland-protocols= packages.

#+begin_src sh
cpt-build wayland wayland-protocols
#+end_src

**** Switching from Xorg

If you are already an Xorg user, you will need to rebuild some packages so that
they support =wayland=. If you don't have an =xorg= system, feel free to skip
this step. The packages that need a rebuild are:

- gtk+3
- gtk4
- mesa
- xorg-server (for Xwayland support)
- webkit2gtk

**** TODO Installing a Compositor

The =wayland= repository currently only contains =sway= as a Wayland compositor,
but you can package something else for your own.

* Contribution Guidelines
:PROPERTIES:
:DESCRIPTION: Contribute to Carbs Linux
:END:

Thanks for taking your time to contribute! To maintain stylistic behaviour
throughout the repositories, one must adhere to these conventions. Exceptions
and changes may occur with good reasoning.

** Conventions
:PROPERTIES:
:DESCRIPTION: Conventions of the distribution
:END:

#+TEXINFO: @macro contid{id}
#+TEXINFO: [@anchor{\id\}\id\]
#+TEXINFO: @end macro

#+TEXINFO: @macro sectid{id, sect}
#+TEXINFO: @strong{@contid{\id\} \sect\}
#+TEXINFO: @end macro

- {{{contid(0010)}}} :: Try to keep the file readable.
  - {{{contid(0011)}}} :: Characters on a line shouldn't exceed 100 characters.
  - {{{contid(0012)}}} :: Make sure you don't have code commented out during
    commit. Uncomment them or remove them completely.
  - {{{contid(0013)}}} :: Do not add comments following the code, add them to the
    top of the code. It makes it harder to read, and lines longer. Here is an example:

  #+BEGIN_EXAMPLE
    # Good way of commenting.
    your code goes here

    your code goes here  # Avoid this way of commenting.
  #+END_EXAMPLE

*** Shell Conventions
:PROPERTIES:
:DESCRIPTION: Conventions for shell scripts
:END:

Shell is central to Carbs Linux projects. Most of the tools and packages are
written in POSIX sh.

- {{{contid(1010)}}} :: Use 4 spaces for indentation, don't use tabs.
- {{{contid(1020)}}} :: Make sure you don't use bash-specific code.
- {{{contid(1030)}}} :: Make sure you lint your code with =shellcheck= and if
  you are new to POSIX sh, use =checkbashisms=.
- {{{contid(1040)}}} :: Don't spawn new processes if you don't absolutely need
  to, especially during string manipulation.
  - {{{contid(1041)}}} :: Never use a program for text manupilation that isn't
    defined in the POSIX standard. This includes =gawk= and =perl=.
  - {{{contid(1042)}}} :: Instead of ~$(basename $file)~, use ~${file##*}~.
  - {{{contid(1043)}}} :: Instead of ~$(dirname $file)~, use ~${file%/*}~.

  #+BEGIN_EXAMPLE
    # This is the same thing as basename /path/to/test.asc .asc

    $ file=/path/to/test.asc file=${file##*/} file=${file%.asc}
    $ echo $file
    test
  #+END_EXAMPLE
- {{{contid(1050)}}} :: Instead of backticks, use ~$(..)~.

*** Repository Conventions
:PROPERTIES:
:DESCRIPTION: Conventions for repository build scripts
:END:

Repository conventions are important in order to ensure every package resemble
themselves. Here are the things to keep in mind:

- {{{contid(2010)}}} :: Prefer tarballs over git packages unless there is a
  sensible reason. Here are some:
  - Every patch is a new release. (See [[https://github.com/vim/vim][vim]])
  - There are no releases. (See [[https://git.suckless.org/sbase][sbase]])
  - Following a development branch.
  - There has been a long time since the latest release, but upstream is far
    ahead.
- {{{contid(2020)}}} :: Prefer sources without a dependency to =automake=. There
  are usually distribution tarballs that are =autoconf='ed. Don't submit tarballs
  with an automake dependency unless you are =sure= there is no alternative.
- {{{contid(2030)}}} :: Avoid these packages:
  - dbus    :: Usually can be disabled by ~--disable-dbus~.
  - gettext :: Usually can be disabled by ~--disable-nls~.
- {{{contid(2040)}}} ::
  - Always install a package to the =/usr= prefix.
  - All binaries should go to =/usr/bin=, not =/usr/sbin= or any other directory.
  - All libraries should go to =/usr/lib=.
- {{{contid(2050)}}} :: All build files on the repository should be a POSIX
  shell script, and must start with ~#!/bin/sh -e~.

The next section is about package templates that should be used in order to
ensure stylistic consistency. Note that the option configurations shouldn't be
taken literally, they are meant as examples.

**** {{{sectid(2210, Make)}}}

#+BEGIN_SRC sh
  #!/bin/sh -e

  make
  make DESTDIR="$1" PREFIX=/usr install
#+END_SRC

**** {{{sectid(2211, Configure/Make)}}}

#+BEGIN_SRC sh
  #!/bin/sh -e

  ./configure \
      --prefix=/usr \
      --disable-option \
      --enable-option

  make
  make DESTDIR="$1" install
#+END_SRC

**** {{{sectid(2212, Autoconf/Automake)}}}

#+TEXINFO: @xref{2020}

#+BEGIN_SRC sh
  #!/bin/sh -e

  autoreconf -fi

  ./configure \
      --prefix=/usr \
      --disable-option \
      --enable-option

  make
  make DESTDIR="$1" install
#+END_SRC

**** {{{sectid(2220, Meson)}}}

#+BEGIN_SRC sh
  #!/bin/sh -e

  export DESTDIR=$1

  meson \
      --prefix=/usr \
      -Doption=false \
      -Doption2=true \
      . output

  ninja -C output
  ninja -C output install
#+END_SRC

**** {{{sectid(2230, Cmake)}}}

#+BEGIN_SRC sh
  #!/bin/sh -e

  export DESTDIR=$1

  cmake -B build \
      -DCMAKE_INSTALL_PREFIX=/usr \
      -DCMAKE_BUILD_TYPE=Release \
      -DOPTION=ON

  cmake --build   build
  cmake --install build
#+END_SRC

**** {{{sectid(2240, Go)}}}

#+BEGIN_SRC sh
  #!/bin/sh -e

  export GOPATH=$PWD/gopath
  trap "go clean -modcache" EXIT INT
  go mod vendor

  go build
  install -Dm755 program "$1/usr/bin/program"
#+END_SRC

**** {{{sectid(2241, Python)}}}

#+BEGIN_SRC sh
  #!/bin/sh -e

  python setup.py build
  python setup.py install --prefix=/usr --root="$1"
#+END_SRC

* GNU Free Documentation License
:PROPERTIES:
:APPENDIX: t
:DESCRIPTION: Your rights
:END:

#+INCLUDE: fdl.org