add release workflow

.github/workflows/release.yml

@@ -0,0 +1,62 @@
+name: Release on Version Change
+
+on:
+  push:
+    paths:
+      - '.version'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Read version
+      id: get_version
+      run: echo "VERSION=$(cat .version)" >> $GITHUB_ENV
+
+    - name: Determine if it's a pre-release
+      id: pre_release_check
+      run: |
+        if [[ "${{ env.VERSION }}" == 0* ]]; then
+          echo "PRE_RELEASE=true" >> $GITHUB_ENV
+          echo "RELEASE_NAME=${{ env.VERSION }}-alpha" >> $GITHUB_ENV
+        else
+          echo "PRE_RELEASE=false" >> $GITHUB_ENV
+          echo "RELEASE_NAME=${{ env.VERSION }}" >> $GITHUB_ENV
+        fi
+
+    - name: Get repository name
+      id: get_repo_name
+      run: echo "REPO_NAME=$(echo ${{ github.repository }} | cut -d'/' -f2)" >> $GITHUB_ENV
+
+    - name: Create a tar.gz archive
+      run: |
+        mkdir release
+        rsync -av --progress . ./release --exclude=".git" --exclude=".github" --exclude="TODO.md" --exclude="README.md"
+        tar -czvf ./${{ env.REPO_NAME }}.tar.gz -C release .
+
+    - name: Create GitHub Release
+      uses: softprops/action-gh-release@v1
+      with:
+        tag_name: ${{ env.VERSION }}
+        body: "version: ${{ env.VERSION }}."
+        prerelease: ${{ env.PRE_RELEASE }}
+        name: ${{ env.RELEASE_NAME }} 
+        files: "${{ env.REPO_NAME }}.tar.gz"
+      env:
+        GITHUB_TOKEN: ${{ secrets.MY_GITHUB_TOKEN }}
+
+    - name: Generate changelog from commits
+      id: generate_changelog
+      run: |
+        CHANGELOG=$(git log -1 --pretty=%B | tr -d '\n' | sed 's/"/\\"/g')
+        echo "CHANGELOG=${CHANGELOG}" >> $GITHUB_ENV
+
+    - name: Update release with changelog
+      run: |
+        gh release edit ${{ env.VERSION }} --notes "${{ env.CHANGELOG }}"
+      env:
+        GITHUB_TOKEN: ${{ secrets.MY_GITHUB_TOKEN }}