arch-ppa

arch-ppa is a tool that easily creates and maintains your own Arch Linux package repositories. Kind of like the Personal Package Archives (PPA) that Ubuntu has, but way easier.

The Arch User Repository (AUR) is convenient, has tons of software, is generally awesome, but is inherently insecure. Anyone can upload anything they want to the AUR. This is why I don't like to use AUR helpers like yaourt or pacaur. Using the AUR with a helper requires you to be diligent in reviewing the PKGBUILDs it downloads, in order to make sure it doesn't include things like viruses or trojans, or downloading from a weird URL.

This tool builds packages from a directory tree of PKGBUILD files. The idea is that you put this directory into a version control system only after having verified the PKGBUILD files are correct and non-malicious. Additionally, the packages are signed with your own gpg key (and verified by the client on installation.) This resolves the insecurity of the AUR in my mind. This gives me the full power of the AUR, but allows me to automate my package installs in a way that I never felt comfortable with before. Seriously, why does pacaur have a --noconfirm option? That's scary. Worse than 10 toolbars on your mother's web browser scary.

The packages this tool builds can be hosted as a regular arch repository, either on your local filesystem or on a webserver. The added convenience here is that although the packages came from the AUR, your clients install it through regular-old pacman.

Usage

Clone this repo somewhere. Everything will be self contained in this directory wherever you put it.

arch-ppa should not be run as root, but the user needs to have sudo privileges as the underlying devtools need it. (If you know how to make arch-nspawn create files with the current uid, please let me know.)

Run setup:

./arch-ppa setup

The setup installs a few dependencies like devtools. It also creates a chroot directory which is a container that will be used to build packages in a completely clean environment using systemd-nspawn.

Add packages from the AUR:

./arch-ppa add cower curlbomb pasystray

This downloads PKGBUILDs from the AUR for the listed packages: cower, curlbomb, pasystray, as well as all of their AUR dependencies, and placed into the src directory. You can manually put any PKGBUILDs you have into the src directory; they don't have to be from the AUR. Note that any PKGBUILD that lists a dependency of another package, that is not found in one of the arch repositories, needs to have it's own PKGBUILD in the src directory too. (The add command does this for you automatically, thanks to cower -d -d)

Build everything:

./arch-ppa clean ryan
./arch-ppa build ryan

The build process operates on a single repository, in this example called ryan. You can maintain several repositories, each containing different sets of packages. Just make sure to give each repository a unique name.

The clean process removes the repository directory containing all the built packages. It also deletes the chroot for the repository from the chroot directory.

The build process creates a new package repository called ryan (or whatever you called yours.) It finds PKGBUILD files in the src directory and figures out the dependency chain and builds all the packages in the correct order. Additionally, you can specify individual package names after the repository name if you only wish to build certain packages.

Update packages:

./arch-ppa update [optional package names]

The update command will download new PKGBUILDs for the specified packages (or all if not specified.) The update will complain if you haven't added the existing packages to a git repository or have uncommited changes. Always review changes to PKGBUILD files before committing them. That's the point of this thing. Use git diff src.

The repository directory can be listed in your /etc/pacman.conf like this:

[ryan]
Server = file:///home/ryan/git/arch-ppa/ryan
SigLevel = Required TrustedOnly

This is the full path to the ryan repository just created. Replace the name in brackets with your chosen repository name and use the path appropriate for your machine. Run pacman -Sy and you should see pacman synchronize with the new repository name. Alternatively, upload the directory to a webserver to share it with all your friends.

The SigLevel option specifies how pacman should trust our repository. Required TruestedOnly is a strict rule that the key must be in the local pacman keyring and be assigned a trust level. Pacman will usually download the key without a problem, but you will still need to locally sign the key to trust it.

See the next section if you're having problems with package signatures not working.

Mini gpg tutorial

View your key information:

gpg -K 

This should output something like this:

/home/ryan/.gnupg/pubring.kbx
-----------------------------
sec   rsa2048/4BAACCF8 2016-04-15 [SC]
uid         [ultimate] test guy <ryantest@enigmacurry.com>
ssb   rsa2048/C22BDAA5 2016-04-15 [E]

My public key ID is 4BAACCF8. Always omit the part before the slash. If it didn't output any key information at all, this means you don't have a key yet. If that's the case, create one and follow the prompts:

gpg --gen-key

Send your public key to the keyserver (replace with your ID):

gpg --send-keys 4BAACCF8

On each machine you plan to use your package repository, run the following to import the key and to locally sign it (meaning to trust it from pacman's perspective. Like before, replace with your key ID):

sudo pacman-key -r 4BAACCF8
sudo pacman-key --lsign-key 4BAACCF8

If you don't sign the key, pacman will complain that your packages are not trusted.

License

Copyright (c) <2016> <Ryan McGuire>

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.