Update GHA workflow

Author: wch

.github/workflows/publish.yml

@@ -27,29 +27,40 @@ jobs:
       - name: Build Extension
         run: npm run vsix
 
-      - name: Check if pre-release
-        id: check_prerelease
-        run: |
-          if [[ ${{ github.ref }} =~ .*-pre.* ]]; then
-            echo "is_prerelease=true" >> $GITHUB_OUTPUT
-          else
-            echo "is_prerelease=false" >> $GITHUB_OUTPUT
-          fi
-
       - name: Upload extension to Actions Artifact
         uses: actions/upload-artifact@v4
         with:
           name: shiny-vscode
           path: "shiny*.vsix"
 
+  check-ref:
+    runs-on: ubuntu-latest
+    outputs:
+      should_publish: ${{ steps.check.outputs.should_publish }}
+      is_prerelease: ${{ steps.check.outputs.is_prerelease }}
+    steps:
+      - id: check
+        run: |
+          if [[ "${{ github.ref_type }}" == "tag" ]]; then
+            echo "should_publish=true" >> $GITHUB_OUTPUT
+            echo "is_prerelease=false" >> $GITHUB_OUTPUT
+          elif [[ "${{ github.ref_type }}" == "branch" ]] && [[ "${{ github.ref_name }}" =~ ^v[0-9.]+-pre[0-9]*$ ]]; then
+            echo "should_publish=true" >> $GITHUB_OUTPUT
+            echo "is_prerelease=true" >> $GITHUB_OUTPUT
+          else
+            echo "should_publish=false" >> $GITHUB_OUTPUT
+            echo "is_prerelease=false" >> $GITHUB_OUTPUT
+          fi
+
   publish-open-vsx:
     runs-on: ubuntu-latest
+    needs:
+      - build-vsix
+      - check-ref
     if: |
       github.event_name == 'push' &&
-      github.ref_type == 'tag' &&
+      needs.check-ref.outputs.should_publish == 'true' &&
       github.repository_owner == 'posit-dev'
-    needs:
-      - build-vsix
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
@@ -58,30 +69,22 @@ jobs:
 
       - run: npm ci
 
-      - name: Check if pre-release
-        id: check_prerelease
-        run: |
-          if [[ ${{ github.ref }} =~ .*-pre.* ]]; then
-            echo "is_prerelease=true" >> $GITHUB_OUTPUT
-          else
-            echo "is_prerelease=false" >> $GITHUB_OUTPUT
-          fi
-
       - name: Publish to Open VSX Registry
         uses: HaaLeo/publish-vscode-extension@v1
         with:
           pat: ${{ secrets.OPEN_VSX_TOKEN }}
           skipDuplicate: true
-          preRelease: ${{ steps.check_prerelease.outputs.is_prerelease }}
+          preRelease: ${{ needs.check-ref.outputs.is_prerelease }}
 
   publish-vscode-marketplace:
     runs-on: ubuntu-latest
+    needs:
+      - build-vsix
+      - check-ref
     if: |
       github.event_name == 'push' &&
-      github.ref_type == 'tag' &&
+      needs.check-ref.outputs.should_publish == 'true' &&
       github.repository_owner == 'posit-dev'
-    needs:
-      - build-vsix
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
@@ -90,19 +93,10 @@ jobs:
 
       - run: npm ci
 
-      - name: Check if pre-release
-        id: check_prerelease
-        run: |
-          if [[ ${{ github.ref }} =~ .*-pre.* ]]; then
-            echo "is_prerelease=true" >> $GITHUB_OUTPUT
-          else
-            echo "is_prerelease=false" >> $GITHUB_OUTPUT
-          fi
-
       - name: Publish to Visual Studio Marketplace
         uses: HaaLeo/publish-vscode-extension@v1
         with:
           pat: ${{ secrets.VSCE_PAT }}
           skipDuplicate: true
           registryUrl: https://marketplace.visualstudio.com
-          preRelease: ${{ steps.check_prerelease.outputs.is_prerelease }}
+          preRelease: ${{ needs.check-ref.outputs.is_prerelease }}