github: Add filter to only run jobs for changed plugins

illume · illume · commit dfecc719b03c · 2025-05-28T10:32:41.000+02:00
Signed-off-by: Ren&eacute; Dudfield &lt;renedudfield@microsoft.com&gt;
diff --git a/.github/workflows/headlamp-plugin-github-workflow.yaml b/.github/workflows/headlamp-plugin-github-workflow.yaml
@@ -5,27 +5,64 @@ on:
     branches: [main]
   pull_request:
     branches: [main]
-  
+
 permissions:
   contents: read
 
 env:
   HEADLAMP_PLUGIN_VERSION: latest
 
 jobs:
-  # Get list of folders containing headlamp plugins
+  # Get list of folders containing changed headlamp plugins
   # We need a separate step to be able to pass the list to the matrix of the build job
-  find_plugin_dirs:
+  find_changed_plugin_dirs:
     runs-on: ubuntu-latest
     outputs:
       dirs: ${{ steps.dirs.outputs.dirs }}
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # 4.1.7
-      - id: dirs
-        run: echo "dirs=$(grep -m1 -lR @kinvolk/headlamp-plugin ./*/package.json | xargs -n1 dirname | jq --raw-input --slurp --compact-output 'split("\n")[:-1]')" >> ${GITHUB_OUTPUT}
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        with:
+          fetch-depth: 0 # Fetch all history
+
+      - name: Fetch base branch
+        run: git fetch origin main
+
+      - name: Find changed Headlamp plugin directories
+        id: dirs
+        run: |
+          # Get all top-level directories that had changes
+          changed_dirs=$(git diff --name-only origin/main...HEAD | awk -F/ '{print $1}' | sort -u)
+          echo "Changed directories: $changed_dirs"
+
+          # If .github/ changed, run all plugins
+          if echo "$changed_dirs" | tr ' ' '\n' | grep -q '^\.github$'; then
+            echo "Changes detected in .github/ directory, running all plugins."
+            changed_dirs=$(grep -lR 'headlamp-plugin' ./*/package.json | xargs -n1 dirname | sort -u)
+            echo "Changed directories: $changed_dirs"
+          fi
+
+          plugin_dirs=()
+          for dir in $changed_dirs; do
+            pkg="$dir/package.json"
+            if [ -f "$pkg" ] && grep -q 'headlamp-plugin' "$pkg"; then
+              plugin_dirs+=("$dir")
+            fi
+          done
 
+          # Output as JSON array for matrix
+          if [ ${#plugin_dirs[@]} -eq 0 ]; then
+            echo "No changed Headlamp plugins found."
+            final_json="[]"
+          else
+            echo "Changed Headlamp plugin directories: ${plugin_dirs[*]}"
+            final_json=$(printf '%s\n' "${plugin_dirs[@]}" | jq --raw-input --slurp --compact-output 'split("\n")[:-1]')
+          fi
+          echo "Final plugin_dirs JSON: $final_json"
+          echo "dirs=$final_json" >> "$GITHUB_OUTPUT"
+          
   build:
-    needs: find_plugin_dirs
+    needs: find_changed_plugin_dirs
+    if: needs.find_changed_plugin_dirs.outputs.dirs != '[]'
     runs-on: ubuntu-latest
 
     defaults:
@@ -36,7 +73,7 @@ jobs:
       fail-fast: false
       matrix:
         node-version: [18.x]
-        dir: ${{ fromJson(needs.find_plugin_dirs.outputs.dirs) }}
+        dir: ${{ fromJson(needs.find_changed_plugin_dirs.outputs.dirs) }}
 
     steps:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # 4.1.7
