Run GitHub pages deployment as a separate action

Author: michaelmior

.github/workflows/ci.yml

@@ -90,25 +90,3 @@ jobs:
       uses: actions/attest-build-provenance@v1
       with:
         subject-path: 'target/scala-2.13/jsonoid-discovery*.jar'
-
-  publish-site:
-    if: ${{ github.event_name != 'pull_request' && !startsWith(github.ref, 'refs/tags/') }}
-    needs: test
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-    - name: Coursier cache
-      uses: coursier/cache-action@v6
-    - uses: coursier/setup-action@v1
-      with:
-        jvm: zulu:11.0.10
-        apps: sbt scala
-    - name: Publish site
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        GITHUB_PAGES_PUBLISH_FORCE_PUSH: true
-      run: |
-          sbt makeSite
-          sbt generateSchemas
-          cp target/jsonoid-schemas/*.json target/site/schemas
-          sbt publishToGitHubPages

.github/workflows/pages.yml

@@ -0,0 +1,28 @@
+name: Publish site
+
+on:
+  workflow_run:
+    workflows: [CI]
+    types: [completed]
+
+jobs:
+  publish-site:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.head_branch == 'main' }}
+    steps:
+    - uses: actions/checkout@v4
+    - name: Coursier cache
+      uses: coursier/cache-action@v6
+    - uses: coursier/setup-action@v1
+      with:
+        jvm: zulu:11.0.10
+        apps: sbt scala
+    - name: Publish site
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        GITHUB_PAGES_PUBLISH_FORCE_PUSH: true
+      run: |
+          sbt makeSite
+          sbt generateSchemas
+          cp target/jsonoid-schemas/*.json target/site/schemas
+          sbt publishToGitHubPages