WIP

.github/filters.yml

@@ -0,0 +1,9 @@
+gemfile:
+  - Gemfile
+  - Appraisals
+  - datadog.gemspec
+  - tasks/appraisal.rake
+  - .github/workflows/lock-dependency.yml
+  - lib/datadog/version.rb
+  - appraisal/**
+  - gemfiles/**

.github/workflows/lock-dependency.yml

@@ -1,26 +1,43 @@
 name: Lock Dependency
 
 on:
-  workflow_dispatch:
-    inputs:
-      branch:
-        description: 'Branch to be lock dependency'
-        required: true
-  # Testing purpose, to be removed before merge.
   push:
-    branches:
-      - tonycthsu/automate-update-gemfiles
 
 # Ensure obsolete job is cancelled if another commit is pushed to the same branch.
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 jobs:
-  # TODO: In order to fully automate this workflow for each PR,
-  # have a reliable way to precheck job to understand whether it need to be updated
+  pr:
+    runs-on: ubuntu-latest
+    outputs:
+      pr_found: ${{ steps.pr.outputs.pr_found }}
+    steps:
+      # Only execute if there's a PR attached to this branch.
+      # Because we execute on `push`, we have to double check here if this is part of a PR.
+      - name: Check if this branch is attached to a Pull Request
+        uses: 8BitJonny/gh-get-current-pr@3.0.0
+        id: pr
+        with:
+          filterOutClosed: true # Don't trigger on commits with closed PRs, including merges into `master`.
+  dependency:
+    needs: pr
+    if: ${{ needs.pr.outputs.pr_found == 'true' }}
+    runs-on: ubuntu-latest
+    outputs:
+      changes: ${{ steps.changes.outputs.gemfile }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dorny/paths-filter@v3
+        id: changes
+        with:
+          base: ${{ github.ref_name }}
+          filters: .github/filters.yml
   lock:
     runs-on: ubuntu-latest
+    needs: dependency
+    if: ${{ needs.dependency.outputs.changes == 'true' }}
     strategy:
       fail-fast: false
       matrix:
@@ -42,12 +59,12 @@ jobs:
             version: '2.6'
           - name: ruby
             version: '2.5'
-          - name: jruby
-            version: '9.4'
-          - name: jruby
-            version: '9.3'
-          - name: jruby
-            version: '9.2'
+          # - name: jruby
+          #   version: '9.4'
+          # - name: jruby
+          #   version: '9.3'
+          # - name: jruby
+          #   version: '9.2'
     container:
       image: ghcr.io/datadog/images-rb/engines/${{ matrix.engine.name }}:${{ matrix.engine.version }}
       env: