[SITE-3292] add @maybe-add-symlinks to post-update-cmd (#175)

* add @maybe-add-symlinks to post-update-cmd
add the symlinks if they don't already exist

* Add symlinks on composer update command as well as composer install.

This update applies the same check to create symlinks to files in the `web/` directory that is run on `composer install` commands to `composer update` as well. This ensures that symlinks are created with upstream updates are applied (`composer update`) as well as when new commits to a site repository are pushed (`composer install`).

For more information, see https://docs.pantheon.io/release-notes/2025/02/wordpress-composer-managed-1-32-5

CHANGELOG.md

@@ -1,4 +1,7 @@
-### v1.32.4
+### v1.32.5 (2025-02-10)
+* Adds the `maybe-install-symlinks` Composer script to `post-update-cmd` hook. This ensures that symlinks are created (and the `web/index.php` file is re-created) after a `composer update`. ([#175](https://github.com/pantheon-systems/wordpress-composer-managed/pull/175))
+
+### v1.32.4 (2025-02-10)
 * Adds a check for `web/index.php` and re-creates the file if it does not exist. Resolves issues where `web/index.php` is missing and breaks a site. ([#173](https://github.com/pantheon-systems/wordpress-composer-managed/pull/173))
 
 ### v1.32.3 (2024-09-10)

upstream-configuration/scripts/ComposerScripts.php

@@ -108,6 +108,13 @@ public static function applyComposerJsonUpdates(Event $event)
             }
         }
 
+        $maybe_add_symlinks = '@maybe-add-symlinks';
+        // Check if @maybe-add-symlinks is already in post-update-cmd. If not, add it.
+        if (!in_array($maybe_add_symlinks, $composerJson['scripts']['post-update-cmd'])) {
+            $io->write("<info>Adding $maybe_add_symlinks to post-update-cmd hook</info>");
+            $composerJson['scripts']['post-update-cmd'][] = $maybe_add_symlinks;
+        }
+
         if (serialize($composerJson) == serialize($originalComposerJson)) {
             return;
         }