Single-source release version from pyproject.toml (#4)

Author: aurimasbutkus

.github/workflows/build-release.yaml

@@ -29,27 +29,41 @@ jobs:
   release:
     runs-on: ubuntu-latest
     needs: [build]
+    permissions:
+      contents: write
+    outputs:
+      new_version: ${{ steps.version.outputs.version }}
+      released: ${{ steps.version.outputs.released }}
 
     steps:
       - name: Repo checkout
         uses: actions/checkout@v4
-
-      - name: Bump version and push tag
-        id: bump
-        uses: mathieudutour/github-tag-action@v6.2
         with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          release_branches: main
+          fetch-depth: 0
+
+      - name: Resolve version
+        id: version
+        run: |
+          VERSION=$(grep -m1 '^version = ' pyproject.toml | sed -E 's/version = "(.*)"/\1/')
+          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+          if git rev-parse "v$VERSION" >/dev/null 2>&1; then
+            echo "released=false" >> "$GITHUB_OUTPUT"
+            echo "Tag v$VERSION already exists — skipping release."
+          else
+            echo "released=true" >> "$GITHUB_OUTPUT"
+          fi
 
-      - name: Release tag
+      - name: Create release
+        if: steps.version.outputs.released == 'true'
         uses: ncipollo/release-action@v1
         with:
-          tag: ${{ steps.bump.outputs.new_tag }}
+          tag: v${{ steps.version.outputs.version }}
           generateReleaseNotes: true
 
   publish:
     runs-on: ubuntu-latest
     needs: [release]
+    if: needs.release.outputs.released == 'true'
     permissions:
       id-token: write
     steps: