Add workflow to check the hardcoded fallback version in pyproject.tom…

…l against the version used in CI/run_reframe.sh and check against git tags listed

.github/workflows/check_versions.yml

@@ -0,0 +1,47 @@
+# documentation: https://help.github.com/en/articles/workflow-syntax-for-github-actions
+name: Test fallback_version and version in run_reframe.sh against tags
+on: [push, pull_request, workflow_dispatch]
+permissions: read-all
+jobs:
+  test_fallback_version_against_tags:
+    # ubuntu <= 20.04 is required for python 3.6
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+    steps:
+        - name: Check out repository
+          uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+          with:
+            persist-credentials: false
+            fetch-depth: 0
+
+        - name: Check fallback version and version used in run_reframe.sh
+          run: |
+            # Get fallback version
+            fallback_version=$(grep -oP 'fallback_version\s*=\s*"\K[^"]+' "test-suite-$GITHUB_SHA/pyproject.toml")
+            # Prepend fallback version with 'v', as that is also the case for the other two version strings
+            fallback_version="v$fallback_version"
+
+            # Get version from run_reframe.sh
+            run_reframe_testsuite_version=$(grep -oP 'EESSI_TESTSUITE_BRANCH\s*=\s*[^v]*\K[^"\x27]*' "test-suite-$GITHUB_SHA/CI/run_reframe.sh")
+
+            # Grab the tag for the highest version, by sorting by (semantic) version, and then filtering on patterns
+            # that match a pattern like v0.1.2. Finally, we grab the last to get the highest version
+            most_recent_version=$(git tag --sort=version:refname | grep -P "v[0-9]+\.[0-9]+\.[0-9]+" | tail -n 1)
+
+            echo "Testing if fallback version and EESSI_TESTSUITE_BRANCH version in CI/run_reframe.sh are the same"
+            if [[ "$fallback_version" != "$run_reframe_testsuite_version" ]]; then
+                echo "Version $fallback_version not equal to $run_reframe_testsuite_version"
+                exit 1
+            else
+                echo "... yes!"
+            fi
+
+            echo "Testing if fallback version and most recent version tag are the same"
+            if [[ "$fallback_version" != "$most_recent_version" ]]; then
+                echo "Version $fallback_version not equal to $most_recent_version"
+                exit 1
+            else
+                echo "... yes!"
+            fi
+