Track wiki pointer drift without republishing content

Author: coisa

.github/actions/wiki/refresh-release-pointer/run.sh

@@ -20,9 +20,15 @@ git -C "${target}" clean -fd
 dev-tools wiki --target="${target}"
 
 if [ -z "$(git -C "${target}" status --porcelain)" ]; then
+    pointer_changed="false"
+
+    if ! git diff --quiet -- "${target}"; then
+        pointer_changed="true"
+    fi
+
     {
         echo "published=false"
-        echo "pointer-changed=false"
+        echo "pointer-changed=${pointer_changed}"
         echo "publish-sha=$(git -C "${target}" rev-parse HEAD)"
     } >> "${GITHUB_OUTPUT}"
 

tests/GitHubActions/RefreshReleaseWikiPointerActionTest.php

@@ -119,6 +119,27 @@ public function refreshWillSkipPublicationWhenTheRenderedWikiDoesNotChange(): vo
         self::assertSame('', trim($status->getOutput()));
     }
 
+    /**
+     * @return void
+     */
+    #[Test]
+    public function refreshWillReportPointerDriftWhenTheWikiRemoteAdvancedWithoutNewRenderedChanges(): void
+    {
+        $workspace = $this->createWorkspaceWithWikiSubmodule();
+        $this->advanceWikiRemote();
+        $this->createMockDevToolsBinary(false);
+        $outputFile = $this->workspace . '/github-output';
+
+        $this->runAction($workspace, $outputFile);
+
+        $outputs = $this->parseKeyValueFile($outputFile);
+        $status = $this->runProcess(['git', 'status', '--short', '.github/wiki'], $workspace);
+
+        self::assertSame('false', $outputs['published']);
+        self::assertSame('true', $outputs['pointer-changed']);
+        self::assertStringContainsString('.github/wiki', $status->getOutput());
+    }
+
     /**
      * @return string
      */
@@ -185,6 +206,19 @@ private function createMockDevToolsBinary(bool $shouldChange): void
         chmod($binDirectory . '/dev-tools', 0o755);
     }
 
+    /**
+     * @return void
+     */
+    private function advanceWikiRemote(): void
+    {
+        $wikiSeed = $this->workspace . '/wiki-seed';
+
+        file_put_contents($wikiSeed . '/README.md', "# Wiki\n\nUpdated upstream.\n");
+        $this->runProcess(['git', 'add', 'README.md'], $wikiSeed);
+        $this->runProcess(['git', 'commit', '-m', 'Advance wiki remote'], $wikiSeed);
+        $this->runProcess(['git', 'push', 'origin', 'master'], $wikiSeed);
+    }
+
     /**
      * @param string $workspace
      * @param string $outputFile