ci: only run tests if files changed or previous run failed

Author: soumyamahunt

.github/actions/condition/action.yml

@@ -0,0 +1,47 @@
+name: Get last run status for workflow
+description: Get last run status for workflow
+inputs:
+  workflow:
+    description: Workflow id to check status of
+    required: false
+    default: main.yml
+  files:
+    description: Check if the files changed
+    required: true
+outputs:
+  proceed:
+    description: Should proceed running steps
+    value: ${{ steps.changed_files.outputs.any_changed == 'true' || steps.last_status.outputs.result != 'true' }} 
+runs:
+  using: composite
+  steps:
+    - name: Check change in files
+      id: changed_files
+      uses: tj-actions/[email protected]
+      with:
+        files: ${{ inputs.files }}
+
+    - name: Get last run
+      if: steps.changed_files.outputs.any_changed != 'true'
+      id: last_status
+      uses: actions/[email protected]
+      with:
+        result-encoding: json
+        script: |
+          const { GITHUB_REF_NAME, WORKFLOW } = process.env;
+          core.startGroup(`Checking last status for workflow \`${WORKFLOW}\` for branch \`${GITHUB_REF_NAME}\``);
+          const result = await github.rest.actions.listWorkflowRuns({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            workflow_id: WORKFLOW,
+            branch: GITHUB_REF_NAME,
+            per_page: 2,
+            page: 1
+          });
+          core.info(JSON.stringify(result));
+          core.endGroup();
+          const success = (result.data.workflow_runs[0]?.status === 'completed') ||
+            (result.data.workflow_runs[1]?.status === 'completed');
+          return success;
+        env:
+          WORKFLOW: ${{ inputs.workflow }}

.github/workflows/ci.yml

@@ -26,28 +26,28 @@ jobs:
         default_bump: false
         dry_run: true
 
-    - name: Check change in documentation
-      id: changed_doc
+    - name: Check should proceed running steps
       if: steps.check_version_bump.outputs.release_type == ''
-      uses: tj-actions/[email protected]
+      id: precondition
+      uses: ./.github/actions/condition
       with:
         files: |
           Sources/**/*
           Package*.swift
           .github/workflows/ci.yml
 
     - name: Setup repository
-      if: steps.changed_doc.outputs.any_changed == 'true'
+      if: steps.precondition.outputs.proceed == 'true'
       uses: ./.github/actions/setup
 
     - name: Build package documentation
-      if: steps.changed_doc.outputs.any_changed == 'true'
+      if: steps.precondition.outputs.proceed == 'true'
       run: |
         npm run build
         npm run serve-doc
 
     - name: Update GitHub Pages
-      if: steps.changed_doc.outputs.any_changed == 'true'
+      if: steps.precondition.outputs.proceed == 'true'
       uses: JamesIves/[email protected]
       with:
           branch: gh-pages

.github/workflows/cocoapods.yml

@@ -13,9 +13,9 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
-    - name: Check change in source files
-      id: changed_source
-      uses: tj-actions/[email protected]
+    - name: Check should proceed running steps
+      id: precondition
+      uses: ./.github/actions/condition
       with:
         files: |
           Sources/**/*.swift
@@ -25,9 +25,9 @@ jobs:
           .github/workflows/cocoapods.yml
 
     - name: Setup repository
-      if: steps.changed_source.outputs.any_changed == 'true'
+      if: steps.precondition.outputs.proceed == 'true'
       uses: ./.github/actions/setup
 
     - name: Run tests
-      if: steps.changed_source.outputs.any_changed == 'true'
+      if: steps.precondition.outputs.proceed == 'true'
       run: npm run pod-lint

.github/workflows/swift-package.yml

@@ -19,9 +19,9 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
-    - name: Check change in source files
-      id: changed_source
-      uses: tj-actions/[email protected]
+    - name: Check should proceed running steps
+      id: precondition
+      uses: ./.github/actions/condition
       with:
         files: |
           Sources/**/*.swift
@@ -31,18 +31,18 @@ jobs:
           .github/workflows/swift-package.yml
 
     - name: Setup repository
-      if: steps.changed_source.outputs.any_changed == 'true'
+      if: steps.precondition.outputs.proceed == 'true'
       uses: ./.github/actions/setup
       with:
         swift: ${{ matrix.swift }}
 
     - name: Run tests
-      if: steps.changed_source.outputs.any_changed == 'true'
+      if: steps.precondition.outputs.proceed == 'true'
       run: npm run test
 
     - name: Swift Coverage Report
       if: |
-        steps.changed_source.outputs.any_changed == 'true' &&
+        steps.precondition.outputs.proceed == 'true' &&
         matrix.swift == '5.6' &&
         github.event_name == 'push'
       uses: maxep/[email protected]
@@ -52,7 +52,7 @@ jobs:
 
     - name: Codecov upload
       if: |
-        steps.changed_source.outputs.any_changed == 'true' &&
+        steps.precondition.outputs.proceed == 'true' &&
         matrix.swift == '5.6' &&
         github.event_name == 'push'
       uses: codecov/[email protected]

.github/workflows/xcode.yml

@@ -16,9 +16,9 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
-    - name: Check change in source files
-      id: changed_source
-      uses: tj-actions/[email protected]
+    - name: Check should proceed running steps
+      id: precondition
+      uses: ./.github/actions/condition
       with:
         files: |
           Sources/**/*.swift
@@ -27,7 +27,7 @@ jobs:
           .github/workflows/xcode.yml
 
     - name: Build with Xcode
-      if: steps.changed_source.outputs.any_changed == 'true'
+      if: steps.precondition.outputs.proceed == 'true'
       uses: mxcl/xcodebuild@v1
       with:
         xcode: '11.3.1'