Add PR Dependency check workflow

.github/workflows/github_actions_dependencies.yml

@@ -0,0 +1,17 @@
+name: Check for Dependencies in PR
+
+on:
+  workflow_call:
+
+permissions:
+  issues: read
+  pull-requests: read
+
+jobs:
+  check_dependencies:
+    runs-on: ubuntu-latest
+    name: "Check GitHub Actions Dependencies"
+    steps:
+      - uses: gregsdennis/dependencies-action@1.4.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pull_request.yml

@@ -2,15 +2,22 @@ name: Pull request
 
 permissions:
   contents: read
+  issues: read
+  pull-requests: read
 
 on:
   pull_request:
-    types: [opened, reopened, synchronize]
+    types: [opened, edited, reopened, labeled, unlabeled, synchronize]
 
 jobs:
+  github_actiion_pr_dependency_check:
+    name: GitHub Action Dependency Check
+    uses: ./.github/workflows/github_actions_dependencies.yml
+
   tests_with_docker_embedded_swift:
     name: Test Embedded Swift SDKs
     uses: ./.github/workflows/swift_package_test.yml
+    if: ${{ github.event_name == 'opened' || github.event_name == 'reopened' || github.event_name == 'synchronize' }}
     with:
       # Wasm
       enable_linux_checks: false
@@ -23,6 +30,7 @@ jobs:
   tests_with_docker:
     name: Test with Docker
     uses: ./.github/workflows/swift_package_test.yml
+    if: ${{ github.event_name == 'opened' || github.event_name == 'reopened' || github.event_name == 'synchronize' }}
     with:
       # Linux
       linux_os_versions: '["jammy", "rhel-ubi9", "amazonlinux2"]'
@@ -46,6 +54,7 @@ jobs:
   tests_without_docker:
     name: Test without Docker
     uses: ./.github/workflows/swift_package_test.yml
+    if: ${{ github.event_name == 'opened' || github.event_name == 'reopened' || github.event_name == 'synchronize' }}
     with:
       # Skip Linux which doesn't currently support docker-less workflow
       enable_linux_checks: false
@@ -65,6 +74,7 @@ jobs:
   tests_macos:
     name: Test
     uses: ./.github/workflows/swift_package_test.yml
+    if: ${{ github.event_name == 'opened' || github.event_name == 'reopened' || github.event_name == 'synchronize' }}
     with:
       enable_linux_checks: false
       enable_windows_checks: false
@@ -77,6 +87,7 @@ jobs:
   build_tests_ios:
     name: Build iOS Tests
     uses: ./.github/workflows/swift_package_test.yml
+    if: ${{ github.event_name == 'opened' || github.event_name == 'reopened' || github.event_name == 'synchronize' }}
     with:
       enable_linux_checks: false
       enable_windows_checks: false
@@ -89,6 +100,7 @@ jobs:
   soundness:
     name: Soundness
     uses: ./.github/workflows/soundness.yml
+    if: ${{ github.event_name == 'opened' || github.event_name == 'reopened' || github.event_name == 'synchronize' }}
     with:
       api_breakage_check_enabled: false
       license_header_check_project_name: "Swift.org"

docs/pr-dependency-workflow.md

@@ -0,0 +1,33 @@
+# PR Dependency Workflow Documentation
+
+## Overview
+
+The [`github_actions_dependencies.yml`](.github/workflows/github_actions_dependencies.yml) workflow uses [a third party GitHub action](https://github.com/marketplace/actions/pr-dependency-check) to enforce PR dependencies.
+
+At the time of writing, the GitHub action supported the following styles, for both issues and PRs.:
+
+- Quick Link: `#5`
+- Partial Link: `gregsdennis/dependencies-action#5`
+- Partial URL: `gregsdennis/dependencies-action/pull/5`
+- Full URL: `https://github.com/gregsdennis/dependencies-action/pull/5`
+- Markdown: `[markdown link](https://github.com/gregsdennis/dependencies-action/pull/5)`
+
+## Usage
+
+Add the following to a `.yaml` file in your `.github/workflows` directory:
+
+```
+name: Check for GitHub Actions Dependencies in PR
+
+on:
+  pull_request_target:
+    types: [opened, edited, reopened, labeled, unlabeled, synchronize]
+
+permissions:
+  issues: read
+  pull-requests: read
+
+jobs:
+  check_dependencies:
+     uses: swiftlang/github-workflows/.github/workflows/github_actions_dependencies.yml.yml@<to-be-updated>
+```