WIP

.github/filters.yaml

@@ -0,0 +1,13 @@
+gemfile:
+  # Files that declare the dependency tree
+  - Gemfile
+  - Appraisals
+  - datadog.gemspec
+  # Files that control gemfile generation
+  - tasks/appraisal.rake
+  - .github/workflows/lock-dependency.yml
+  # The gem version is present in all lock files
+  - lib/datadog/version.rb
+  # In case the generated files were updated manually or in a merge commit
+  - appraisal/**
+  - gemfiles/**

.github/workflows/lock-dependency.yml

@@ -1,26 +1,37 @@
 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
+  changes:
+    runs-on: ubuntu-latest
+    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/[email protected]
+        id: pr
+        with:
+          filterOutClosed: true # Don't trigger on commits with closed PRs, including merges into `master`.
+      - if: steps.pr.outputs.pr_found == 'true'
+        uses: actions/checkout@v4
+      # And also, only execute if files that can affect gemfiles are modified.
+      - if: steps.pr.outputs.pr_found == 'true'
+        uses: dorny/paths-filter@v3
+        id: filter
+        with:
+          base: ${{ github.ref_name }}
+          filters: .github/filters.yaml
   lock:
     runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.gemfile == 'true' }}
     strategy:
       fail-fast: false
       matrix:
@@ -42,12 +53,12 @@ jobs:
             version: '2.6'
           - name: ruby
             version: '2.5'
-          - name: jruby
-            version: '9.4'
-          - name: jruby
-            version: '9.3'
-          - name: jruby
-            version: '9.2'
+          # - name: jruby
+          #   version: '9.4'
+          # - name: jruby
+          #   version: '9.3'
+          # - name: jruby
+          #   version: '9.2'
     container:
       image: ghcr.io/datadog/images-rb/engines/${{ matrix.engine.name }}:${{ matrix.engine.version }}
       env: