Merge pull request #880 from hamishcoleman/release

Only trigger automatic release process on annotated tags

.github/workflows/tests.yml

@@ -479,6 +479,10 @@ jobs:
           name: binaries
           path: binaries
 
+  # Given the clearly documented use of annotated tags to signal releases,
+  # it seems strange that there is no simple way to trigger actions if the
+  # tag is annotated.  So we need to jump through some hoops.
+  #
   upload_release:
     name: Upload Release Assets
     if: startsWith(github.ref, 'refs/tags/')
@@ -492,12 +496,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Get Tag Type
+        run: |
+          echo '::set-output name=TAGTYPE::$(git cat-file -t $GITHUB_REF)'
+
       - name: Fetch all Artifacts
+        if: steps.get_tagtype.outputs.TAGTYPE == 'tag'
         uses: actions/download-artifact@v2
         with:
           path: artifacts
 
       - name: Upload Assets to Release
+        if: steps.get_tagtype.outputs.TAGTYPE == 'tag'
         uses: softprops/action-gh-release@v1
         with:
           prerelease: true