Chaotic infra 4.0

This repository contains the code for Chaotic-AUR's infra 4.0, as well as the repository template in a git submodule. It supersedes Infra 3.0, taking a different approach to distributing and executing builds.

If any issues with this application occur, please open a new problem to let us know about it - you can click here to start the process.

Reasoning

Our previous build tool, the so-called toolbox was initially created by @pedrohlc to deal with one issue: having a lot of packages to compile while not having many maintainers for all of the packages. Additionally, Chaotic-AUR has quite inhomogeneous builders: servers, personal devices, and one HPC which all need to be integrated somehow. The toolbox had a nice approach to this - keeping things as KISS as possible and using Git to distribute package builds between builders. These would then grab builds according to their activated routines. While this works fairly well, it had a few problems which we tried to get rid of in the new version. Here are a few key ideas about this new setup:

• Since we like working with CI a lot besides it providing great enhancement for automating boring tasks as well as making the whole process more transparent to the public as well, it was clear CI should be a major part of it.
• The system should have a scheduler that distributes build tasks to nodes, which prevents useless build routines and enables nodes to grab jobs whenever they are queued.
• The tools should be available as Docker containers to make them easy to use on systems other than Arch.
• All logic besides the scheduler (which is written in TypeScript using BullMQ) should be written in Bash

How it works

The new system consists of three integral parts:

• The CI (which can be both GitLab CI and GitHub Actions!) handles PKGBUILDs, their changes, and figuring out what to build, utilizing a Chaotic Manager container to schedule packages via the central Redis instance.
• The central Redis instance storing information about currently scheduled builds.
• The Chaotic Manager which is used to add new builds to the queue and execute them via the main manager container. All containers have SSH-tunneled access to the Redis instance, enabling the build containers to grab new builds whenever they enter the queue.

Compared to Infra 3.0, this means we have the following key differences:

• We no longer have package lists but a repository full of PKGBUILD folders. These PKGBUILDs are getting pulled either from AUR once a package has been updated or updated manually in case a Git repository and its tags serve as a source.
• No more dedicated builders (might change in the future, eg. for heavy builds?) but a common build queue.
• Routines are no longer necessary - CI determines and adds packages to the schedule as needed. The only "routine-like" the thing we have is the CI schedule, executing tasks like PKGBUILD or version updates.
• The actual logic behind the build process (like interfere.sh or database management) was moved to the builder container of Chaotic Manager - this one updates daily/on-commit and gets pulled regularly by the Manager instance.
• Live-updating build logs will be available via CI - multiple revisions instead of only the latest.
• The interfere repo is no longer needed, instead, package builds can be configured via the .CI folder in their respective PKGBUILD folders. All known interfere types can be put here (eg. PKGBUILD.append or prepare.sh), keeping existing interferes working.
• The CI's behavior concerning each package can be configured via a config file in the .CI folder: this file stores information like PKGBUILD source (it can be AUR or something different), PKGBUILD timestamp on AUR, most recent Git commit as well as settings like whether to push a PKGBUILD change back to AUR.
• PKGBUILD changes can now be reviewed in case of major (all changes other than pkgver, hashes, pkgrel) updates - CI automatically creates a PR containing the changes for human review.
• Adding and removing packages is entirely controlled via Git - after adding a new PKGBUILD folder via commit, the corresponding package will automatically be deployed. Removing it has the opposite effect.

Workflows and information

Adding packages

Adding packages is as easy as creating a new folder named after the $pkgbase of the package. Put the PKGBUILD and all other required files in here. Adding AUR packages is therefore as simple as cloning its repo and removing the .git folder. CI relies on .SRCINFO files to parse most information, therefore, it is important to have them in place and up-to-date in the case of self-managed packages. Finally, add a .CI folder containing the basic config (CI_PKGBUILD_SOURCE is required in case its external package, self-managed PKBUILDs don't need it), commit any changes, and push the changes back to the main branch. Please follow the conventional commit convention while doing so (cz-cli can help with that!). This means commits like:

• feat($pkgname): init
• fix($pkgname): fix xyz
• chore($pkgname): update PKGBUILD
• ci(config): update

This not only helps with having a uniform commit history, but it also allows automatic changelog generation.

Removing packages

This can be done by removing the folder containing a package's PKGBUILD. A cleanup job will then automatically remove any obsolete package via the on-commit pipeline run. This will also consider any split packages that a package might produce. Renaming folders also counts as removing packages.

On-commit pipeline

Whenever pushing a new commit, the CI pipeline will carry out the following actions:

• Checking when the last scheduled tag was created. This is used to determine which packages need to be scheduled.
• It parses each commit for a [deploy $foldername] string, only accepting valid values derived from the existing PKGBUILD folders. [deploy all] is a valid parameter as well. Misspelling $pkgname is a fatal error here. Any issues must be fixed and force-pushed.
• Then, the changed files are parsed. This also includes removed packages. Any changed relevant folder content will cause a package deployment of the corresponding package.
• The final action is to build the schedule parameters (handing it over to the scheduled job via artifacts) and remove all obsolete packages in case an earlier step is detected.
• In case all of these actions succeed, the scheduled tag gets updated, so we can refer to it on a later pipeline run.

On-schedule pipeline

Half-hourly

Every half an hour, the on-schedule pipeline will carry out a few tasks:

• Updating the CI template from the template repository (in case this is enabled via .ci/config)
• Check if the scheduled tag does not exist or scheduled does not point to HEAD (in this case abort mission!)
• Check whether the .state worktree containing the state of the packages exists, if it does, it sets it up. Otherwise, it re-creates it from scratch (e.g., on force push)
• Check whether the last commit is automated (containing "chore(packages): update packages [skip ci]"), if yes, the commit resulting from the schedule will overwrite it to keep the commit history clean.
• Collect AUR timestamps of packages to determine whether a PKGBUILD changed
• Loop through each valid package and carry out the following actions:
  • Read the .CI/config file to gain information about the package configuration (e.g., whether to manage the AUR repository, the source of the PKGBUILD, etc.)
  • Update PKGBUILD in the following cases:
    • CI_PKGBUILD_SOURCE is set to gitlab: Updates the PKGBUILD from the GitLab repository tags
    • CI_PKGBUILD_SOURCE is set to aur: Updates the PKGBUILD from the AUR repository, pulling in the git repo and replacing the existing files with the new ones. If the AUR timestamp cannot be collected earlier, the package update gets skipped.
    • CI_PKGBUILD_SOURCE is not set to gitlab or aur: tries to update the PKGBUILD by pulling the repository specified in CI_PKGBUILD_SOURCE. In case cloning is not successful after 2 tries, the update process gets skipped.
  • In case CI_GIT_COMMIT is set in the package configuration variables, the latest commit of the git URL set in the source section of the PKGBUILD is updated. If it differs, schedule a build.
  • In case a custom hook exists (.CI/update.sh inside the package directory), it gets executed - this can be used for updating PKGBUILDs with a custom script.
  • Writing needed variables back to .CI/config (eg. Git hash)
• Either update the PKGBUILD silently in case of minor changes, create a PR for review in case of major updates (and only if CI_HUMAN_REVIEW is true)
  • Updates are only considered if diff reports changes between the current PKGBUILD folder and the AUR PKGBUILD repo
  • Any change made to the source files is detected, however does not detect malicious changes in the upstream project source that the package builds
• The state work tree gets updated with new information
• Schedule parameters are getting built and handed over to the scheduled job via artifact
• Obsolete branches (eg. merged review PRs) are getting pruned
• The scheduled tag gets updated again

Daily

A daily pipeline schedule has been added for specific packages that generate their pkgver dynamically. To make use of it, set CI_ON_TRIGGER=daily inside the .CI/config file of the package.

Manual scheduling

Scheduling packages without git commits

Packages can be added to the schedule manually by going to the pipeline runs page, selecting "Run pipeline" and adding PACKAGES as a variable with the package names as their value. The pipeline will then pick up the packages and schedule them. PACKAGES can also be set to all to schedule all packages. In case one or many packages are getting scheduled, it needs to follow the format pkgname1,pkgname2,pkgname3.

Running scheduled pipelines on-demand

This can be done by going to the pipeline runs page, and selecting "Run pipeline" (the play symbol). A link to the pipeline page will be provided, where the pipeline logs can be obtained.

Adding interfere

Put the required interfere file in the .CI folder of a PKGBUILD folder:

• prepare: A script that is being executed after the building chroot has been set up. It can be used to source environment variables or modify other things before compilation starts.
  • If something needs to be set up before the actual compilation process, commands can be pushed by inserting eg. $CAUR_PUSH 'source /etc/profile'. Likewise, package conflicts can be solved, eg. as follows: $CAUR_PUSH 'yes | pacman -S nftables' (single quotes are important because we want the variables/pipes to evaluate in the guest's runtime and not while interfering)
• interfere.patch: a patch file that can be used to fix either multiple files or PKGBUILD if a lot of changes are required. All changes need to be added to this file.
• PKGBUILD.prepend: contents of this file are added to the beginning of PKGBUILD.
• PKGBUILD.append: contents of this file are added to the end of PKGBUILD. Fixing build() as is easy as adding the fixed build() into this file. This can be used for all kinds of fixes. If something needs to be added to an array, this is as easy as makedepend+=(somepackage).
• on-failure.sh: A script that is being executed if the build fails.
• on-success.sh: A script that is being executed if the build succeeds.

Bumping pkgrel

This is now carried out by adding the required variable CI_PKGREL to .CI/config. See below for more information.

Dependency trees

The CI builds dependency trees automatically. They are passed to the Chaotic manager as a CI artifact and read whenever a schedule command is being executed. No manual intervention is needed.

.CI/config

The .CI/config file inside each package directory contains additional flags to control the pipelines and build processes with.

• CI_MANAGE_AUR: By setting this variable to true, the CI will update the corresponding AUR repository at the end of a pipeline run if changes occur (omitting CI-related files)
• CI_PACKAGE_BUMP: Controls package bumps for all packages which don't have CI_MANAGE_AUR set to true. It increases pkgrel by 0.1 for every +1 increase of this variable.
• CI_PKGBUILD_SOURCE: Sets the source for all PKGBUILD-related files, used for pulling updated files from remote repositories. Valid values as of now are:
  • gitlab: Pulls the PKGBUILD from the GitLab repository tags. It needs to follow the format gitlab:$PROJECT_ID. The ID can be obtained by browsing the repository settings general section.
  • aur: Pulls the PKGBUILD from the AUR repository, pulling in the git repo and replacing the existing files with the new ones.
• CI_ON_TRIGGER: can be provided in case a special schedule trigger should schedule the corresponding package. This can be used to schedule packages daily, by setting the value to daily. Since this checks whether "$TRIGGER == $CI_ON_TRIGGER", any custom schedule can be created using pipeline schedules and setting TRIGGER to midnight, adding a fitting schedule and setting CI_ON_TRIGGER for any affected package to midnight.
• BUILDER_CACHE_SOURCES: can be set to true in case the sources should be cached between builds. This can be useful in case of slow sources or sources that are not available all the time. Sources will be cleared automatically after 1 month, which is important in case packages are getting removed or the source changes.

Known state variables

The state will be kept in the .state worktree. It can be viewed by browsing the state branch of a PKGBUILD repository. Each package will have its file named after the package name. The following variables are known to be stored:

• CI_GIT_COMMIT: Used by CI to determine whether the latest commit changed. Used by fetch-gitsrc to schedule new builds. Needs to be provided in case the package should be treated as a git package. CI will automatically update the latest available commit of the git URL set in the source section of the PKGBUILD. If it differs, schedule a build. -CI_PKGBUILD_TIMESTAMP: The last modified date of the PKGBUILD on AUR. This is used to determine whether the PKGBUILD has changed. If it differs, schedule a build. Will be maintained automatically.

CI pipeline variables

These variables can be set in in the repo root's.ci/config to configure the pipeline behavior globally as follows:

• BUILD_REPO: The target repository that will be the deployment target
• GIT_AUTHOR_EMAIL: The email of the user that will be used to commit
• GIT_AUTHOR_NAME: The name of the user that will be used to commit
• REDIS_SSH_HOST: The Redis SSH host for the target repository (for SSH tunneling)
• REDIS_SSH_PORT: The Redis SSH port for the target repository (for SSH tunneling)
• REDIS_SSH_USER: The Redis SSH user for the target repository (for SSH tunneling)
• REDIS_PORT: The redis port for the target repository (inside the SSH tunnel)
• REPO_NAME: The name that this repository is referred to in Chaotic Manager's config
• CI_HUMAN_REVIEW: If merge/pull requests should be created for non-pkgver changes
• CI_MANAGE_AUR: This should be set to true in case select AUR repositories should be managed by CI
• CI_OVERWRITE_COMMITS: If we should overwrite existing automated commits to reduce the size of the git history
• CI_CLONE_DELAY: How long to wait between every executed git clone command for rate limits
• CI_AUR_PROXY: Proxy to use for AUR requests

Managing AUR packages

AUR packages can also be managed via this repository in an automated way using .CI_CONFIG. This means that after each scheduled and on-commit pipeline, the AUR repository will be updated to reflect the changes done to the PKGBUILD folder's files. Files not relevant to AUR maintenance (e.g. .CI folders) will be omitted. The commit message reflects the fact that the commit was created by a CI pipeline and contains the link to the source repository's commit history and the pipeline run that triggered the updated commit.

Updating the CI's scripts

This is done automatically via the CI pipeline. Once changes have been detected on the template repository, all files will be updated to the current version.

Issues and pipeline failures

Last on-commit pipeline failed

This can happen in case of a few reasons, for example having provided an invalid package name. This causes the scheduled tag to not be updated. In this case, the on-schedule pipeline will not be able to run. The last on-commit pipeline needs to be fixed before the on-schedule pipeline can run again. Build failures, however, are not accounted for as the scheduled tag would be updated already as soon as the scheduling parameters were generated. Force pushing a fixed-up commit is actively encouraged in such a case, as pushing another commit will cause the CI to evaluate the previous commits it missed, leading to noticing the same issue again and bailing out instead of silently continuing. This has been a design decision to prevent failures from being overlooked.

Resetting the build queue

There might be rare cases in which a reset of the build queue is needed. This can be done by shutting down the central Redis instance, removing its dump, and restarting its service.

Deploying to different repos using the same infrastructure

This is now an officially supported use case. The only thing required is to use another repository that is going to store PKGBUILDs and execute CI pipelines. The environment variables passed to the main Chaotic Manager instance control which repositories are available to use while scheduling packages. See below for more information.

Chaotic Manager

This tool is distributed as Docker containers and consists of a pair of manager and builder instances.

• Manager: registry.gitlab.com/garuda-linux/tools/chaotic-manager/manager
  • Manages builds by adding them to the schedule, used e.g. in the schedule step of CI pipelines
  • Provides log management and the live-updating logs
  • Manages any existing builds by spinning up build containers, picking from the available BullMQ builder/database queues
  • Picks up already built package archives from the landing zone (builder containers push finished build archives here) to add them to the database of the target repository
• Builder: registry.gitlab.com/garuda-linux/tools/chaotic-manager/builder
  • This one contains the actual logic behind package builds ( seen here) known from infra 3.0 like interfere.sh, database.sh etc.
  • This one is used by an executing manager instance to run the build processes with. It runs jobs present in the builder BullMQ queue.

An example of a valid config can be found in the Garuda Linux infrastructure repository. The following variables can be set in the Docker environment:

• DATABASE_HOST: database address published to the outside world
• DATABASE_PORT: the port behind packages can be deployed to
• DATABASE_USER: the user to use to deploy packages
• GPG_PATH: where the .gnupg folder resides (holding the key for signing packages)
• LANDING_ZONE_PATH: where the landing zone is (here packages get deployed and later picked up by the database job before getting into the final repository)
• LOGS_URL: the URL that serves the logfiles (we get sent here when clicking CI's external stages)
• PACKAGE_REPOS_NOTIFIERS: needed configs to provide external CI stages for GitLab CI/GitHub Actions
• PACKAGE_REPOS: the source repositories containing PKGBUILD folders
• PACKAGE_TARGET_REPOS: the repository a package is getting deployed to (including its URL and extra keyrings/repos needed)
• REDIS_PASSWORD: password for accessing the Redis instance
• REDIS_SSH_HOST: where to access the Redis instance
• REDIS_SSH_USER: the user who can access the Redis instance
• REPO_PATH: the path where the final package deployment happens
• TELEGRAM_BOT_TOKEN: the token for the Telegram bot, used for notifications
• TELEGRAM_CHAT_ID: the chat ID for the Telegram bot to send deployment or failure notifications to

The following variables are only relevant for builder instances:

• BUILDER_HOSTNAME: the hostname of the builder will be displayed in package logs to determine which builder built a package
• BUILDER_TIMEOUT: the timeout for a package build, 3600 seconds by default. Should be increased on slow builders

Setting up

Requirements

The base requirements for running this kind of setup are as follows:

• Docker/Podman must be installed in the target system, docker-/podman-compose is good to have as well. We will use it in the following examples.

• A Redis instance must be available, e.g. installed on the host system or added to ´docker-compose.yml`:

  chaotic-redis:
    image: redis:alpine
    container_name: chaotic-redis
    restart: always
    ports:
      - "6379:6379"
    command: redis-server --save 60 1 --loglevel warning --requirepass verysecurepassword
    volumes:
      - ./redis-data:/data
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  The following examples assume Redis to be installed on the host system. In case it is added to docker-compose.yml, replace any occurrences of host.docker.internal with chaotic-redis.

• A reverse proxy like Nginx to expose the Chaotic Manager's logs to the public in a secure way should be available. E.g., using Nginx it is sufficient to proxy_pass the specified --web-port value to the Manager instance container. Additionally, the following settings might be useful:

  proxy_buffering off;
  proxy_read_timeout 330s;
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Exemplary Manager instance setup

chaotic-manager:
  image: registry.gitlab.com/garuda-linux/tools/chaotic-manager/manager:latest
  container_name: chaotic-manager
  command: database --web-port 8080
  environment:
    DATABASE_HOST: sub.domain.tld
    DATABASE_PORT: 22
    DATABASE_USER: package-deployer
    GPG_PATH: /var/awesome-repo/gnupg
    LANDING_ZONE_PATH: /var/awesome-repo/landing-zone
    LOGS_URL: https://sub.domain.tld/logs/logs.html
    REDIS_PASSWORD: verysecurepassword
    REDIS_SSH_HOST: host.docker.internal
    REDIS_SSH_USER: package-deployer
    REPO_PATH: /srv/http/repos
    TELEGRAM_BOT_TOKEN: 1234567890
    TELEGRAM_CHAT_ID: 0987654321
    PACKAGE_REPOS: >-
      {
          "awesome-repo": {
              "url": "https://gitlab.com/awesome-repo/pkgbuilds"
          }
      }
    PACKAGE_TARGET_REPOS: >-
      {
          "awesome-repo": {
              "extra_repos": [
                  {
                      "name": "awesome-repo",
                      "servers": [
                          "https://sub.domain.tld/awesome-repo/x86_64"
                      ]
                  }
              ],
              "extra_keyrings": [
                  "https://sub.domain.tld/awesome-repo/awesome-keyring.pkg.tar.zst"
              ]
          }
      }
    PACKAGE_REPOS_NOTIFIERS: >-
      {
          "awesome-repo": {
              "id": "123456",
              "token": "GITLABAPITOKENWITHAPIACCESS",
              "check_name": "awesome-repo: %pkgbase%"
          }
      }
  volumes:
    - ./sshkey:/app/sshkey
    - /var/run/docker.sock:/var/run/docker.sock
    - /srv/http/repos:/repo_root
  extra_hosts:
    - "host.docker.internal:host-gateway"
  ports: [8080:8080]
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The following things are to note:

• PACKAGE_REPOS, PACKAGE_TARGET_REPOS, and PACKAGE_REPOS_NOTIFIERS are JSON values and need to be valid JSON to be processed.
• The above setup assumes the docker-compose.yml to be present in var/awesome-repo.
• LOGS_URL needs to match the address which the reverse proxy publishes --web-port 8080 to the outside world.
• REPO_PATH is the path of the repository on the Docker host. The same path must be mapped to /repo_root inside the container via volumes.
• /app/sshkey is assumed to be the private SSH key
• Ports don't have to be explicitly exposed if using a Nginx Docker container, in this setup however, our Nginx and Redis instances are present on the host system.
• PACKAGE_REPOS_NOTIFIERS and TELEGRAM_* variables are optional but provide additional functionality if they are set.
• DATABASE_HOST refers to the address published to the outside world, e.g. for additional builders and other servers.

Exemplary Builder instance setup

---
services:
  chaotic-builder:
    image: registry.gitlab.com/garuda-linux/tools/chaotic-manager/manager:latest
    container_name: chaotic-builder
    command: builder
    environment:
      BUILDER_TIMEOUT: 7200
      BUILDER_HOSTNAME: awesome-builder
      REDIS_PASSWORD: verysecurepassword
      REDIS_SSH_HOST: host.docker.internal
      REDIS_SSH_USER: package-deployer
      SHARED_PATH: /var/chaotic/shared
      DATABASE_HOST: host.docker.internal
      DATABASE_PORT: 22
    volumes:
      - ./shared:/shared
      - ./sshkey:/app/sshkey
      - /var/run/docker.sock:/var/run/docker.sock
    extra_hosts:
      - "host.docker.internal:host-gateway"
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The following things are to note:

• The above setup assumes the docker-compose.yml to be present in var/awesome-repo.
• The SHARED_PATH variable needs to match the directory mapped to /shared inside the container.
• DATABASE_HOST can, in theory, be any other host, but can be set to host.docker.internal in case the Redis instance runs on the Docker host.
• The Docker socket needs to be mounted as the builder instance will use it to spin up build container instances.
• /app/sshkey is assumed to be the private SSH key used for pushing finished package builds to the manager instance's landing zone.
• BUILDER_TIMEOUT only needs to be set in case it is a slower-build machine that does not finish heavy tasks in one hour.
• As many instances of this container can be added to the setup as wanted. Each of them will allow the processing of another build at the same time in total.

Features

Chaotic-Manager container commands

• schedule: Schedules a new package build by adding it to the Redis instance. It takes the following arguments:
  • arch: The architecture to build the package for
  • target-repo: The target repository to deploy the package to, referring to the PACKAGE_TARGET_REPOS variable set in the Docker environment variables.
  • source-repo: The source repository to pull the package from, referring to the PACKAGE_REPOS variable set in the Docker environment variables.
  • commit: The commit hash which the schedule call originates from
  • deptree: the dependency tree built by the CI pipeline. This parameter is omitted in CI pipelines and instead passed as a file, reading from /.ci/deptree.txt. The reason is that the parameter will be too huge to be processed by the shell if 100+ packages are scheduled at the same time. It contains information about the build order of packages and their dependencies.
• builder: Starts the build job, which then grabs any available build jobs from the build queue.
• auto-repo-remove: Removes obsolete packages from the target repository. Further parameters must include the pkgbases to be removed.
• database: Starts the manager instance, which is responsible for managing queues, logs, and database jobs. It additionally spins up a web server to serve logs if --web-port is passed as an argument.
• web: Starts the webserver to serve logs from. This is only needed in case the manager instance does not run the web server.

Web server

Available routes on the port set up by the --web-port parameter are as follows:

• /api/logs/:id/:timestamp: Returns the log file of a package build. The id is the package's ID, and the timestamp is the timestamp of the build.
• /api/logs/:id: Returns the latest log file of a package build. The id is the package's ID.
• /api/queue/stats: Returns a JSON object containing the current queue stats.
• /api/queue/packages: Returns a JSON object containing information on the currently scheduled packages.
• /metrics: Returns collected Prometheus metrics.

Notifications

Notifications about relevant events can be sent to a Telegram channel or chat via a Bot. This requires a valid Bot token and the Chat ID to be set. The following events are currently supported:

• Build failures: additionally contain links to full build logs and the originating commit.

  🚨 Failed deploying to awesome-repo:
  > freecad-git - logs- commit
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• Build success:

  📣 New deployment to awesome-repo:
  > freecad-git
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• Timed-out build: Contains links to full build logs and the originating commit.

  ⏳ Build for awesome-repo failed due to a timeout:
  > freecad-git - logs - commit
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• Successful repo-remove jobs:

  ✅ Repo-remove job for awesome-repo finished successfully
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• Failed repo-remove jobs:

  🚫 Repo-remove job for awesome-repo failed
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Build order

The build order is determined by the dependency tree built by the CI pipeline. This tree is passed to the manager and is then used to determine the correct build order automatically. No further intervention is needed to achieve this.

Live-updating logs

Logs are live-updating and can be viewed in real time via the web server. In case GitLab is used and PACKAGE_REPOS_NOTIFIERS is set, an external CI stage will be created for every package scheduled during the CI run, linking to the log.

Prometheus metrics

Prometheus metrics are available at the /metrics endpoint of the web server. Currently, we collect default prom-client metrics as well as statistics about the total event count of each build status (failed, successful, already-built, timed out) as well as metrics about overall build times. These can be collected via a Prometheus instance and then visualized using Grafana.

How to contribute

• Create a fork of this repository.
• Clone your fork locally (short git tutorial).
• Add the desired changes to the source code
• Commit using a conventional commit message and push any changes back to your fork. This is crucial as it allows our CI to generate changelogs easily.
  • The commitizen application helps with creating a fitting commit message.
  • You can install it via pip as there is currently no package in Arch repos: pip install --user -U Commitizen.
  • Then proceed by running cz commit in the cloned folder.
• Create a new merge request at our main repository.
• Check if any of the pipeline runs fail and apply eventual suggestions.

Development setup

This repository features a NixOS flake, which may be used to set up the needed things like pre-commit hooks and checks, as well as needed utilities, automatically via direnv. This includes checking PKGBUILDs via shellcheck and shfmt. Needed are nix (the package manager) and direnv, after that, the environment may be entered by running direnv allow.

Testing setup

The testing setup can easily be started from the root of the repository by running nix-shell and then sudo bash start-test.sh. This accepts two parameters, docker and native.

• The first one starts the test setup in Docker containers.
• The second one runs both the manager and builder instances via ts-watch, meaning that any changes to the source code are immediately reflected by the running instances.

Adding new builds

New builds can be added by running yarn start schedule xcursor-breeze (or any other existing package). The default repo is Chaotic-AUR, which will be used to source packages from.