ci: Prepare to make compute resources for CI configurable cirrus-ci will soon restrict the amount of free resources every user gets (as have many other CI providers). For most users of CI that should not be an issue. But e.g. for cfbot it will be an issue.
To allow configuring different resources on a per-repository basis, introduce infrastructure for overriding the task execution environment. Unfortunately this is not entirely trivial, as yaml anchors have to be defined before their use, and cirrus-ci only allows injecting additional contents at the end of .cirrus.yml. To deal with that, move the definition of the CI tasks to .cirrus.tasks.yml. The main .cirrus.yml is loaded first, then, if defined, the file referenced by the REPO_CI_CONFIG_GIT_URL variable, will be added, followed by the contents of .cirrus.tasks.yml. That allows REPO_CI_CONFIG_GIT_URL to override the yaml anchors defined in .cirrus.yml. Unfortunately git's default merge / rebase strategy does not handle copied files, just renamed ones. To avoid painful rebasing over this change, this commit just renames .cirrus.yml to .cirrus.tasks.yml, without adding a new .cirrus.yml. That's done in the followup commit, which moves the relevant portion of .cirrus.tasks.yml to .cirrus.yml. Until that is done, REPO_CI_CONFIG_GIT_URL does not fully work. The subsequent commit adds documentation for how to configure custom compute resources to src/tools/ci/README Reviewed-by: Daniel Gustafsson <dan...@yesql.se> Reviewed-by: Nazir Bilal Yavuz <byavu...@gmail.com> Discussion: https://postgr.es/m/20230808021541.7lbzdefvma7qm...@awork3.anarazel.de Backpatch: 15-, where CI support was added Branch ------ REL_15_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/284465e1b95ef5f561b0fadead2468c0c63c0f82 Modified Files -------------- .cirrus.star | 63 ++++++++++++++++++++++++++++++++++++++++ .cirrus.yml => .cirrus.tasks.yml | 0 2 files changed, 63 insertions(+)