generate CHANGELOG in release workflow

Author: kzhdev

.github/workflows/release.yml

@@ -14,11 +14,49 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Fetch all history for changelog generation
 
       - name: Extract version from tag
         id: get_version
         run: echo "VERSION=${GITHUB_REF#refs/tags/v}" >> $GITHUB_OUTPUT
 
+      - name: Generate CHANGELOG
+        run: |
+          echo "# Changelog" > CHANGELOG.md
+          echo "" >> CHANGELOG.md
+          echo "All notable changes to this project will be documented in this file." >> CHANGELOG.md
+          echo "" >> CHANGELOG.md
+
+          # Get all tags sorted by version
+          TAGS=$(git tag -l 'v*' --sort=-v:refname)
+
+          PREV_TAG=""
+          for TAG in $TAGS; do
+            echo "## [$TAG] - $(git log -1 --format=%ai $TAG | cut -d' ' -f1)" >> CHANGELOG.md
+            echo "" >> CHANGELOG.md
+
+            if [ -z "$PREV_TAG" ]; then
+              # First tag - show all commits up to this tag
+              git log $TAG --pretty=format:"- %s (%h)" --no-merges >> CHANGELOG.md
+            else
+              # Show commits between previous tag and current tag
+              git log $PREV_TAG..$TAG --pretty=format:"- %s (%h)" --no-merges >> CHANGELOG.md
+            fi
+
+            echo "" >> CHANGELOG.md
+            echo "" >> CHANGELOG.md
+            PREV_TAG=$TAG
+          done
+
+      - name: Commit CHANGELOG
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git add CHANGELOG.md
+          git diff --staged --quiet || git commit -m "Update CHANGELOG for ${{ github.ref_name }}"
+          git push origin HEAD:main
+
       - name: Create header archive
         run: |
           cd include