chore: add GitHub Actions workflow to create releases from changelog (#14)

Author: OnestarLee

.github/workflows/CreateReleaseFromChangeLog.yml

@@ -0,0 +1,93 @@
+name: Create Release from Changelog
+
+on:
+  workflow_dispatch:
+    inputs:
+      dry_run:
+        description: 'Dry run (do not create tag/release)'
+        required: false
+        type: boolean
+        default: false
+
+jobs:
+  create-release-from-changelog:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Extract version and changelog
+        id: extract
+        run: |
+          # Extract the latest version from CHANGELOG.md
+          VERSION=$(grep -m 1 -E "^## [0-9]+\.[0-9]+\.[0-9]+" CHANGELOG.md | sed -E 's/^## ([0-9]+\.[0-9]+\.[0-9]+).*/\1/')
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "tag=v$VERSION" >> $GITHUB_OUTPUT
+
+          # Extract changelog content for the latest version
+          CHANGELOG_CONTENT=$(awk '/^## [0-9]+\.[0-9]+\.[0-9]+/{if(++count==1){flag=1;next}else{flag=0}}flag' CHANGELOG.md)
+
+          # Save changelog to a temporary file
+          echo "$CHANGELOG_CONTENT" > /tmp/release_notes.md
+
+          echo "Extracted version: $VERSION"
+          echo "Release notes:"
+          cat /tmp/release_notes.md
+
+      - name: Check if tag exists
+        id: check_tag
+        run: |
+          TAG="${{ steps.extract.outputs.tag }}"
+          if git rev-parse "$TAG" >/dev/null 2>&1; then
+            echo "exists=true" >> $GITHUB_OUTPUT
+            echo "Tag $TAG already exists"
+          else
+            echo "exists=false" >> $GITHUB_OUTPUT
+            echo "Tag $TAG does not exist"
+          fi
+
+      - name: Create and push tag
+        if: steps.check_tag.outputs.exists == 'false' && inputs.dry_run == false
+        run: |
+          TAG="${{ steps.extract.outputs.tag }}"
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git tag -a "$TAG" -m "Release $TAG"
+          git push origin "$TAG"
+          echo "Created and pushed tag: $TAG"
+
+      - name: Create GitHub Release
+        if: steps.check_tag.outputs.exists == 'false' && inputs.dry_run == false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          TAG="${{ steps.extract.outputs.tag }}"
+          VERSION="${{ steps.extract.outputs.version }}"
+
+          gh release create "$TAG" \
+            --title "Release $VERSION" \
+            --notes-file /tmp/release_notes.md
+
+          echo "Created GitHub release: $TAG"
+
+      - name: Dry run summary
+        if: inputs.dry_run == true
+        run: |
+          echo "=== DRY RUN MODE ==="
+          echo "Version: ${{ steps.extract.outputs.version }}"
+          echo "Tag: ${{ steps.extract.outputs.tag }}"
+          echo "Tag exists: ${{ steps.check_tag.outputs.exists }}"
+          echo ""
+          echo "Release notes:"
+          cat /tmp/release_notes.md
+
+      - name: Skip (tag already exists)
+        if: steps.check_tag.outputs.exists == 'true'
+        run: |
+          echo "Tag ${{ steps.extract.outputs.tag }} already exists. Skipping release creation."
+          echo "If you want to recreate the release, please delete the existing tag first."