Add new GitHub workflow to sync branches through PR

Author: caponetto

.github/workflows/sync-branches-through-pr.yml

@@ -0,0 +1,47 @@
+---
+name: Sync branches through Pull Request
+
+on:  # yamllint disable-line rule:truthy
+  workflow_dispatch:
+    inputs:
+      source:
+        description: Source branch
+        required: true
+      target:
+        description: Target branch
+        required: true
+
+jobs:
+  sync:
+    permissions:
+      contents: write
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.inputs.target }}
+          fetch-depth: 0
+
+      - name: Prepare sync branch
+        id: prepare
+        run: |
+          git fetch origin ${{ github.event.inputs.source }}
+          git reset --hard origin/${{ github.event.inputs.source }}
+
+          TIMESTAMP=$(date +'%Y%m%d%H%M%S')
+          SYNC_BRANCH=sync__${{ github.event.inputs.source }}__${{ github.event.inputs.target }}__${TIMESTAMP}
+          echo "branch=$SYNC_BRANCH" >> $GITHUB_OUTPUT
+
+      - name: Create pull request
+        uses: peter-evans/create-pull-request@c5a7806660adbe173f04e3e038b0ccdcd758773c  # v6.1.0
+        with:
+          branch: ${{ steps.prepare.outputs.branch }}
+          title: "Sync `${{ github.event.inputs.target }}` branch with `${{ github.event.inputs.source }}` branch"
+          body: |
+            :robot: This is an automated Pull Request created by `/.github/workflows/sync-branches-through-pr.yml`.
+
+            It merges all commits from `${{ github.event.inputs.source }}` branch into `${{ github.event.inputs.target }}` branch.
+
+            :warning: **IMPORTANT NOTE**: Remember to delete the `${{ steps.prepare.outputs.branch }}` branch after merging the changes.