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Metatools ([https://code.funtoo.org/bitbucket/users/drobbins/repos/funtoo-metatools/browse git]) ([https://pypi.org/project/funtoo-metatools/ pypi]) is the framework used by Funtoo Linux
#REDIRECT [[Funtoo:Metatools]]
to create meta-repo and autogenerate ebuilds. It is a foundational tool for Funtoo Linux development.
 
The current version of metatools is '''1.0.0''', released on Jan 30, 2022.
 
== What is an "Autogen"? ==
 
Quite simply, an "autogen" is kind of like an ebuild generator, using the metatools Python framework to dynamically generate ebuilds. A key functionality of an autogen is to allow ebuilds to be generated
to reflect the current version of source code that is available from upstream.
 
== Where can I Find Autogens? ==
 
You can find autogens by looking in the kit-fixups repository ([https://code.funtoo.org/bitbucket/projects/CORE/repos/kit-fixups/browse git]) for any files named:
 
# {{f|autogen.py}}
# {{f|autogen.yaml}}
 
Both YAML and Python autogens use our metatools framework -- the YAML variants are higher-level autogens that feed metatools "generators", kind of like a pipeline.
As of Jan 29, 2022, all Funtoo Linux source overlays -- kit-fixups as well as others -- support the creation of autogens. What this means is that it's possible to write an autogen for anything in Funtoo to ensure that it is always kept up-to-date.
 
== Installation ==
 
To install metatools, emerge it:
 
{{console|body=
# ##i##emerge metatools
}}
 
One of the dependencies of metatools is [[MongoDB]]. Before using metatools, ensure {{c|mongodb}} is started and running:
 
{{console|body=
# ##i##rc-update add mongodb default
# ##i##rc
}}
 
== Autogen Setup ==
 
The command in metatools that performs autogeneration locally is called {{c|doit}}. Prior to using this command locally, it's recommended to create an {{f|~/.autogen}} file under your user account that
contains a GitHub personal access token. This will allow {{c|doit}} to use it when querying GitHub and will prevent {{c|doit}} from hitting API limits:
 
{{file|name=~/.autogen|body=
authentication:
  api.github.com:
    username: danielrobbins
    password: <insert access token string here>
}}
 
For more information on setting up GitHub personal access tokens, see: https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token
 
== Autogen Usage ==
 
Funtoo's meta-repo is defined in the kit-fixups repository ([https://code.funtoo.org/bitbucket/projects/CORE/repos/kit-fixups/browse git]), which is the starting point for all autogeneration of ebuilds.
 
To perform your first {{c|doit}} run, enter into the appropriate kit-fixups directory and run the {{c|doit}} command:
 
{{console|body=
$ ##i##cd development/kit-fixups/core-kit/curated
$ ##i##doit
\##g##[INFO 21:02:35]##!g## Fetched https://git-scm.com/download/linux 6042 bytes
\##g##[INFO 21:02:35]##!g## Created: dev-vcs/git/git-2.35.1.ebuild
\##g##[INFO 21:02:35]##!g## Fetched https://api.github.com/repos/hashicorp/vagrant_cloud/tags 9513 bytes
\##g##[INFO 21:02:36]##!g## Created: dev-ruby/vagrant_cloud/vagrant_cloud-2.0.3.ebuild
\##g##[INFO 21:02:36]##!g## Fetched https://api.github.com/repos/distcc/distcc/releases 34549 bytes
\##g##[INFO 21:02:36]##!g## Created: sys-devel/distcc/distcc-3.4.ebuild
\##g##[INFO 21:02:36]##!g## Fetched https://api.github.com/repos/dbrgn/tealdeer/releases 151336 bytes
\##g##[INFO 21:02:36]##!g## Fetched https://api.github.com/repos/tmux/tmux/releases 94211 bytes
\##g##[INFO 21:02:36]##!g## Created: app-misc/tmux/tmux-3.2a.ebuild
\##g##[INFO 21:02:36]##!g## Fetched https://api.github.com/repos/lotabout/skim/releases 225892 bytes
\##g##[INFO 21:02:36]##!g## Fetched https://ftp.debian.org/debian/pool/main/c/ca-certificates/ 7174 bytes
\##g##[INFO 21:02:36]##!g## Created: app-misc/ca-certificates/ca-certificates-20211016.ebuild
\##g##[INFO 21:02:36]##!g## Fetched https://api.github.com/repos/jarun/nnn/releases 564842 bytes
\##g##[INFO 21:02:36]##!g## Fetched https://api.github.com/repos/netwide-assembler/nasm/tags 13895 bytes
\##g##[INFO 21:02:36]##!g## Created: app-misc/nnn/nnn-4.4.ebuild
\##g##[INFO 21:02:36]##!g## Fetched https://api.github.com/repos/doxygen/doxygen/tags?per_page=100 46121 bytes
}}
 
What you are seeing above is output from the {{c|doit}} command, which will:
 
# Find all autogens ({{f|autogen.yaml}} and {{f|autogen.py}} files) in the current directory tree
# Execute them using multiple threads, which in turn will cause {{c|doit}} to:
# Query upstream Web sites and APIs (like GitHub) for current versions of source code, and:
# Fetch all source code artifacts (distfiles) by using an efficient spider engine, and:
# Auto-create ebuilds for these packages, along with Manifests.
 
Funtoo contributors will use the {{c|doit}} command locally to test their autogens and ensure their proper operation before submitting a PR.
 
== Where Can I Learn More about Metatools? ==
 
The best place to learn is to join us in the #dev-help channel on [https://discord.gg/BNUSpUU Discord].
 
There is "in progress" documentation for metatools at our to-be-launched projects site: https://projects.funtoo.org/metatools/docs/install.html
SSL Cert is not yet valid and the documentation is a work in progress. Refer to this wiki page for current setup documentation until the documentation
has caught up with the current release of metatools.
 
[[Category:Official Documentation]]

Latest revision as of 05:45, February 22, 2022

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