ci(release): skip the tag-push run when the release already exists

.github/workflows/release.yml

@@ -5,7 +5,9 @@ on:
     types: [published]
   # Pushing a v* tag also releases: the job creates the GitHub release from the
   # CHANGELOG section first. A release created with GITHUB_TOKEN doesn't fire
-  # `release: published`, so this never runs twice for one tag.
+  # `release: published`. Publishing a release on GitHub also pushes its tag;
+  # that push run queues behind the release run and then stops, because the
+  # release already exists.
   push:
     tags: ['v*']
 
@@ -22,13 +24,15 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Create GitHub release for a pushed tag
+        id: release
         if: github.event_name == 'push'
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           TAG="${GITHUB_REF_NAME}"
           if gh release view "${TAG}" > /dev/null 2>&1; then
-            echo "Release ${TAG} already exists"
+            echo "Release ${TAG} already exists; its own run publishes it"
+            echo "skip=true" >> "$GITHUB_OUTPUT"
             exit 0
           fi
           # Release notes are the CHANGELOG section for this version.
@@ -43,13 +47,15 @@ jobs:
           gh release create "${TAG}" --verify-tag --title "${TAG}" --notes-file release-notes.md
 
       - name: Build release binary
+        if: steps.release.outputs.skip != 'true'
         run: |
           swift build -c release --disable-sandbox
           cp .build/release/XCForgeCLI .build/release/xcforge
           file .build/release/xcforge
           echo "BINARY_PATH=.build/release/xcforge" >> "$GITHUB_ENV"
 
       - name: Package tarball (binary + xcforgeWDA)
+        if: steps.release.outputs.skip != 'true'
         run: |
           BINARY="${BINARY_PATH}"
           VERSION="${GITHUB_REF_NAME}"
@@ -62,6 +68,7 @@ jobs:
           echo "SHA256=$(shasum -a 256 "${TARBALL}" | awk '{print $1}')" >> "$GITHUB_ENV"
 
       - name: Package mcpb bundle
+        if: steps.release.outputs.skip != 'true'
         run: |
           BINARY="${BINARY_PATH}"
           VERSION="${GITHUB_REF_NAME}"
@@ -72,6 +79,7 @@ jobs:
           echo "MCPB_SHA=${MCPB_SHA}" >> "$GITHUB_ENV"
 
       - name: Update server.json
+        if: steps.release.outputs.skip != 'true'
         run: |
           VERSION="${GITHUB_REF_NAME}"
           DOWNLOAD_URL="https://github.com/justinthevoid/xcforge/releases/download/${VERSION}/xcforge-${VERSION}.mcpb"
@@ -85,11 +93,13 @@ jobs:
             server.json > server.json.tmp && mv server.json.tmp server.json
 
       - name: Upload release assets
+        if: steps.release.outputs.skip != 'true'
         run: gh release upload --clobber "${GITHUB_REF_NAME}" "${TARBALL}" "${MCPB}"
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Commit updated server.json
+        if: steps.release.outputs.skip != 'true'
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
@@ -109,6 +119,7 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Update Homebrew tap
+        if: steps.release.outputs.skip != 'true'
         env:
           HOMEBREW_TAP_TOKEN: ${{ secrets.HOMEBREW_TAP_TOKEN }}
         run: |