adding detect api changes workflow

Author: goergisn

.github/workflows/detect-api.changes.yml

@@ -0,0 +1,65 @@
+name: 👀 Detect public API changes
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  workflow_dispatch:
+    inputs:
+      new:
+        description: 'Branch/tag of the new/updated version'
+        required: true
+      old:
+        description: 'Branch/tag of the old/comparison version'
+        required: true
+      
+jobs:
+
+  build:
+    runs-on: macos-14 # Apple Silicon Runner
+
+    steps:
+    - uses: actions/checkout@v4
+    - uses: n1hility/cancel-previous-runs@v3
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Select latest Xcode
+      uses: maxim-lobanov/setup-xcode@v1
+      with:
+        xcode-version: '15.4'
+        
+    - name: 🚚 Fetch repo
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+        
+    - name: 🔍 Detect Changes
+      run: |
+        PROJECT_FOLDER=$PWD
+        
+        NEW="${{ env.source }}~${{ env.githubRepo }}"
+        if [[ '${{ github.head_ref || env.noTargetBranch }}' == 'release/*' ]]
+        then
+            LATEST_TAG=$(git describe --tags --abbrev=0)
+            OLD="$LATEST_TAG~${{ env.githubRepo }}"
+        else
+            OLD="${{ env.target }}~${{ env.githubRepo }}"
+        fi
+        
+        cd Scripts
+        ./public-api-diff project --new "$NEW" --old "$OLD" --output "$PROJECT_FOLDER/api_comparison.md" --log-output "$PROJECT_FOLDER/logs.txt"
+        cat "$PROJECT_FOLDER/logs.txt"
+        cat "$PROJECT_FOLDER/api_comparison.md" >> $GITHUB_STEP_SUMMARY
+      env:
+        source: '${{ github.event.inputs.new || github.head_ref }}'
+        target: '${{ github.event.inputs.old || github.event.pull_request.base.ref }}'
+        githubRepo: '${{github.server_url}}/${{github.repository}}.git'
+        noTargetBranch: 'no target branch'
+       
+    - if: ${{ github.event.pull_request.base.ref != '' }}
+      name: 📝 Comment on PR
+      uses: thollander/actions-comment-pull-request@v3
+      with:
+        file-path: "${{ github.workspace }}/api_comparison.md"
+        comment-tag: api_changes
+        mode: recreate