Auto merge of #124175 - Kobzol:ci-dynamic-job, r=pietroalbini

CI: dynamic jobs

This PR modifies our CI workflows to be dynamic. This means that when a GitHub event is generated, we will run a Python script (`calculate-job-matrix.py`), which decides which CI jobs should be generated. These jobs are defined in `src/ci/github-actions/jobs.yml`).

This should provide a few benefits:
- Once the migration to dynamic jobs is complete, we shouldn't need `expand-yaml-anchors` anymore.
- The job table on PRs (and also the left job column on auto/try builds) should be much cleaner and contain only the jobs that are actually relevant/executed.
- It should be much easier to support dynamic try builds, i.e. to run an arbitrary CI job on a try build.

See [this Zulip discussion](https://rust-lang.zulipchat.com/#narrow/stream/242791-t-infra/topic/job.20matrix.20re-ordered.20PR.20list) for more context.

r? `@ghost`

1 files changed, 0 insertions, 25 deletions

diff --git a/src/ci/scripts/calculate-job-matrix.py b/src/ci/scripts/calculate-job-matrix.py
deleted file mode 100755
index 9b1e74c23c3..00000000000
--- a/src/ci/scripts/calculate-job-matrix.py
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env python3
-
-"""
-This script serves for generating a matrix of jobs that should
-be executed on CI.
-
-It reads job definitions from `src/ci/github-actions/jobs.yml`
-and filters them based on the event that happened on CI.
-
-Currently, it only supports PR builds.
-"""
-
-import json
-from pathlib import Path
-
-import yaml
-
-JOBS_YAML_PATH = Path(__file__).absolute().parent.parent / "github-actions" / "jobs.yml"
-
-
-if __name__ == "__main__":
-    with open(JOBS_YAML_PATH) as f:
-        jobs = yaml.safe_load(f)
-    job_output = jobs["pr"]
-    print(f"jobs={json.dumps(job_output)}")