Add release workflow

Author: avcopan

.github/workflows/build.yaml

@@ -9,7 +9,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     strategy:
-      fail-fast: false
+      fail-fast: true
 
     steps:
       # Repository
@@ -20,16 +20,7 @@ jobs:
       - name: Set up Pixi
         uses: prefix-dev/setup-pixi@v0.8.9
 
-      # Build
+      # Test build (release workflow builds and uploads)
       - name: Build
         run: |
-          pixi build
-
-      # Upload
-      - name: Upload
-        if: ${{ github.ref_name == 'dev' && github.repository_owner == 'Auto-Mech'}}
-        run: |
-          pixi run -e build upload
-        env:
-          ANACONDA_API_KEY: ${{ secrets.ANACONDA_API_KEY }}
-        continue-on-error: true
+          pixi build

.github/workflows/release.yaml

@@ -0,0 +1,71 @@
+name: release
+
+on:
+  pull_request_target:
+    types: [closed]
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    if: >
+      github.event.pull_request.merged == true && (
+        contains(github.event.pull_request.labels.*.name, 'release:patch') ||
+        contains(github.event.pull_request.labels.*.name, 'release:major')
+      )
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+
+    steps:
+      # 1. Checkout the merged code
+      - name: Checkout merged code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.base.ref }}
+          fetch-depth: 0
+
+      # 2. Setup environment
+      - name: Set up Pixi
+        uses: prefix-dev/setup-pixi@v0.8.9
+
+      - name: Fetch bot identity
+        id: bot
+        uses: raven-actions/bot-details@v1
+
+      - name: Configure git for committing
+        run: |
+          git config user.name "${{ steps.bot.outputs.name }}"
+          git config user.email "${{ steps.bot.outputs.email }}"
+
+      # 3. Bump version
+      - name: Bump version (patch)
+        if: contains(github.event.pull_request.labels.*.name, 'release:patch')
+        run: pixi run -e build bumpver update --patch
+
+      - name: Bump version (major)
+        if: contains(github.event.pull_request.labels.*.name, 'release:major')
+        run: pixi run -e build bumpver update --major
+
+      - name: Get version
+        id: version
+        run: |
+          echo "tag=$(pixi run current-version)" >> "$GITHUB_OUTPUT"
+
+      # 4. Build and upload conda package
+      - name: Build
+        run: |
+          pixi build
+
+      - name: Upload
+        run: |
+          pixi run -e build upload
+        env:
+          ANACONDA_API_KEY: ${{ secrets.ANACONDA_API_KEY }}
+
+      # 5. Create release
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ steps.version.outputs.tag }}