Extract PR test to a single workflow

Author: Ariouz

.github/scripts/extract_matrix.py

@@ -18,8 +18,6 @@
     "GITHUB_CI": "true"
 }
 
-PR_JOBS='^(?=.*python)(?!.*(retagger|dsl)).*$'
-
 # If any of these terms are in the job json, they do not run in public
 # infrastructure
 JOB_EXCLUSION_TERMS = (
@@ -295,8 +293,6 @@ def get_tagged_jobs(buildspec, target, filter=None):
 
 
 def main(jsonnet_bin, ci_jsonnet, target, filter=None, indent=False):
-    if not filter: filter = PR_JOBS
-
     result = subprocess.check_output([jsonnet_bin, ci_jsonnet], text=True)
     buildspec = json.loads(result)
     tagged_jobs = get_tagged_jobs(buildspec, target, filter=filter)

.github/workflows/ci-matrix-gen.yml

@@ -12,8 +12,6 @@ on:
       jobs_to_run:
         required: true
         type: string
-  pull_request:
-    types: [review_requested, ready_for_review]
   schedule:
     - cron: '0 0 * * 1'
 
@@ -24,7 +22,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     env:
       TARGET: tier1
-      JOBS: ${{ inputs.jobs_to_run || (github.event_name == 'schedule' && 'python-svm-build-gate-linux|python-unittest-retagger|python-unittest-retagger-merge') || ''}}
+      JOBS: ${{ inputs.jobs_to_run }}
     steps: &generate_matrix
       - uses: actions/checkout@v4
       - name: Download sjsonnet

.github/workflows/ci-unittests.yml

@@ -0,0 +1,11 @@
+name: Run CI unittests
+on:
+  pull_request:
+    types: [review_requested, ready_for_review]
+  workflow_dispatch:
+
+jobs:
+  run-retagger:
+    uses: ./.github/workflows/ci-matrix-gen.yml
+    with:
+      jobs_to_run: ^(?=.*python)(?!.*(retagger|dsl)).*$