Show the Enable auto-updates toggle for the self-updater

WordPress only renders the "Enable auto-updates" toggle for a plugin that
appears in the update_plugins transient's response or no_update list, which
is what sets core's update-supported flag. UpdateChecker only populated the
response side (when a newer release existed), so between releases the plugin
was absent from the transient and the toggle never showed.

provideUpdate() now returns a no_update payload (installed version, empty
package) whenever no newer release is offered — including when the release
lookup fails — so the plugin stays in the transient and the toggle appears.
The response path (one-click and unattended updates) is unchanged.

Bumps to 1.1.1 so the fix ships to installed sites via the self-updater.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

CHANGELOG.md

@@ -13,6 +13,9 @@ each change under the current top section as you work.
 
 ## [1.1.1]
 
+### Fixed
+- The **Enable auto-updates** toggle now appears for the plugin on the Plugins screen. The self-updater now reports the plugin to WordPress even when it is already current, so core marks it update-supported and shows the toggle; previously the toggle was hidden between releases.
+
 ## [1.1.0]
 
 ### Added

docs/features/plugin-self-update.md

@@ -50,9 +50,16 @@ update for a same-slug plugin and makes core fire the
 4. When newer, returns the release's first `.zip` asset as the update
    package. Core takes over from there: Plugins-screen notice, one-click
    update, and WP-Cron auto-updates if enabled.
+5. When not newer — the site is current, or the lookup failed — returns a
+   `no_update` payload (installed version, empty package). This keeps the
+   plugin in core's `update_plugins` transient so core's `update-supported`
+   flag stays set and the **Enable auto-updates** toggle shows on the
+   Plugins screen. Without it, an off-directory plugin is absent from the
+   transient between releases and the toggle never appears.
 
 Any API failure, malformed response, or asset-less release degrades to
-"no update available" — never an error surfaced to the site.
+"no update available" (the `no_update` payload) — never an error surfaced
+to the site, and never a lost auto-update toggle during a Gitea blip.
 
 ## Cutting a Release
 1. Bump the version in `unsupervised-schedular.php` (both the `Version:`

src/Update/UpdateChecker.php

@@ -75,9 +75,18 @@ class UpdateChecker {
 	}
 
 	/**
-	 * `update_plugins_{hostname}` filter callback. Returns the incoming
+	 * `update_plugins_{hostname}` filter callback.
-	 * value untouched unless a newer release with a zip asset exists, in
+	 *
-	 * which case it returns the update array core expects.
+	 * For a newer release with a zip asset, returns the update array core
+	 * files under the transient's `response` list (the update offer).
+	 * Otherwise — the plugin is current, or the release lookup failed — it
+	 * returns a payload with the installed version and no package, which core
+	 * files under `no_update`. That `no_update` entry is what sets core's
+	 * `update-supported` flag and makes the "Enable auto-updates" toggle
+	 * appear on the Plugins screen; without it, an off-directory plugin is
+	 * absent from the transient between releases and the toggle never shows.
+	 *
+	 * The incoming value is only passed through untouched for other plugins.
 	 */
 	public function provideUpdate( mixed $update, mixed $plugin_data, mixed $plugin_file ): mixed {
 		if ( plugin_basename( USC_PLUGIN_FILE ) !== $plugin_file ) {
@@ -86,14 +95,8 @@ class UpdateChecker {
 
 		$release = $this->latestRelease();
 
-		if ( '' === $release['version'] || '' === $release['package'] ) {
+		if ( '' !== $release['version'] && '' !== $release['package']
-			return $update;
+			&& version_compare( $release['version'], USC_VERSION, '>' ) ) {
-		}
-
-		if ( version_compare( $release['version'], USC_VERSION, '<=' ) ) {
-			return $update;
-		}
-
 			return [
 				'slug'    => 'unsupervised-schedular',
 				'version' => $release['version'],
@@ -102,6 +105,17 @@ class UpdateChecker {
 			];
 		}
 
+		// No newer release: answer with a `no_update` payload so core keeps
+		// the plugin in the update transient and shows the auto-update toggle.
+		// The empty package leaves core nothing to auto-install, as intended.
+		return [
+			'slug'    => 'unsupervised-schedular',
+			'version' => USC_VERSION,
+			'url'     => self::REPO_URL,
+			'package' => '',
+		];
+	}
+
 	/**
 	 * The latest published release, from the transient cache when fresh.
 	 *

tests/Unit/Update/UpdateCheckerTest.php

@@ -32,6 +32,22 @@ class UpdateCheckerTest extends TestCase
         return ['name' => $name, 'browser_download_url' => self::PACKAGE_URL];
     }
 
+    /**
+     * The payload provideUpdate() returns when no newer release is offered.
+     * Core files this under the transient's `no_update` list, which is what
+     * makes the "Enable auto-updates" toggle appear. USC_VERSION is 1.0.0 in
+     * the test bootstrap.
+     */
+    private function noUpdatePayload(): array
+    {
+        return [
+            'slug'    => 'unsupervised-schedular',
+            'version' => '1.0.0',
+            'url'     => UpdateChecker::REPO_URL,
+            'package' => '',
+        ];
+    }
+
     public function testRegisterHooksHostnameFilter(): void
     {
         Filters\expectAdded('update_plugins_git.unsupervised.ca')->once();
@@ -109,7 +125,7 @@ class UpdateCheckerTest extends TestCase
         self::assertFalse($result);
     }
 
-    public function testNoUpdateWhenReleaseIsNotNewer(): void
+    public function testNoUpdatePayloadWhenReleaseIsNotNewer(): void
     {
         Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
         Functions\when('get_transient')->justReturn(false);
@@ -118,7 +134,9 @@ class UpdateCheckerTest extends TestCase
 
         $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);
 
-        self::assertFalse($result);
+        // Current version → core files this under `no_update` so the
+        // auto-update toggle stays visible; no package to install.
+        self::assertSame($this->noUpdatePayload(), $result);
     }
 
     public function testUsesCachedReleaseWithoutHittingApi(): void
@@ -134,7 +152,7 @@ class UpdateCheckerTest extends TestCase
         self::assertSame('2.0.0', $result['version']);
     }
 
-    public function testApiFailureIsCachedAndReturnsUpdateUnchanged(): void
+    public function testApiFailureIsCachedAndStillReportsUpdateSupport(): void
     {
         Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
         Functions\when('get_transient')->justReturn(false);
@@ -150,10 +168,12 @@ class UpdateCheckerTest extends TestCase
 
         $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);
 
-        self::assertFalse($result);
+        // Even with the lookup failed we still return the `no_update` payload,
+        // so the auto-update toggle does not flicker away during a Gitea blip.
+        self::assertSame($this->noUpdatePayload(), $result);
     }
 
-    public function testNon200ResponseReturnsUpdateUnchanged(): void
+    public function testNon200ResponseReturnsNoUpdatePayload(): void
     {
         Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
         Functions\when('get_transient')->justReturn(false);
@@ -162,7 +182,7 @@ class UpdateCheckerTest extends TestCase
 
         $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);
 
-        self::assertFalse($result);
+        self::assertSame($this->noUpdatePayload(), $result);
     }
 
     public function testPicksFirstZipAssetAndSkipsOthers(): void
@@ -181,7 +201,7 @@ class UpdateCheckerTest extends TestCase
         self::assertSame(self::PACKAGE_URL, $result['package']);
     }
 
-    public function testReleaseWithoutZipAssetOffersNoUpdate(): void
+    public function testReleaseWithoutZipAssetOffersNoUpdatePayload(): void
     {
         Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
         Functions\when('get_transient')->justReturn(false);
@@ -192,10 +212,12 @@ class UpdateCheckerTest extends TestCase
 
         $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);
 
-        self::assertFalse($result);
+        // No installable package means no update to offer, but we still keep
+        // the plugin in `no_update` so the toggle shows.
+        self::assertSame($this->noUpdatePayload(), $result);
     }
 
-    public function testMalformedApiBodyOffersNoUpdate(): void
+    public function testMalformedApiBodyOffersNoUpdatePayload(): void
     {
         Functions\when('plugin_basename')->justReturn(self::PLUGIN_FILE);
         Functions\when('get_transient')->justReturn(false);
@@ -207,6 +229,6 @@ class UpdateCheckerTest extends TestCase
 
         $result = (new UpdateChecker())->provideUpdate(false, [], self::PLUGIN_FILE);
 
-        self::assertFalse($result);
+        self::assertSame($this->noUpdatePayload(), $result);
     }
 }