fix(autoload-generator): survive listeners that re-enter dump()

AutoloadGenerator::dump dispatches PRE_AUTOLOAD_DUMP / POST_AUTOLOAD_DUMP, and
EventDispatcher::make_autoloader answers those by walking back into the Composer
graph -- the local repository, the installation manager, and the generator
itself. Installer::run held mutable borrows of all three across the dump call,
so any plugin subscribing to either event panicked with "RefCell already
borrowed" before its listener ran.

dump() and build_package_map() now take the local repository, the installation
manager and the locker as shared handles instead of &mut dyn, and the borrow is
taken where it is used.

The generator itself is re-entered, not just borrowed twice: PHP listeners reach
it through Composer::getAutoloadGenerator() and call setDevMode() while dump()
is running, and make_autoloader asks the same object for a package map. That is
not expressible behind &mut self, so the mutable state moves into Cell/RefCell
fields and the whole AutoloadGeneratorInterface takes &self.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 7 insertions, 11 deletions

diff --git a/crates/shirabe/src/command/reinstall_command.rs b/crates/shirabe/src/command/reinstall_command.rs
index 05543870..b16b6c92 100644
--- a/crates/shirabe/src/command/reinstall_command.rs
+++ b/crates/shirabe/src/command/reinstall_command.rs
@@ -307,27 +307,23 @@ impl Command for ReinstallCommand {
 
             let autoload_generator = composer.get_autoload_generator();
             autoload_generator
-                .borrow_mut()
+                .borrow()
                 .set_class_map_authoritative(authoritative);
-            autoload_generator.borrow_mut().set_apcu(apcu, apcu_prefix);
+            autoload_generator.borrow().set_apcu(apcu, apcu_prefix);
             autoload_generator
-                .borrow_mut()
+                .borrow()
                 .set_platform_requirement_filter(self.get_platform_requirement_filter(input)?);
 
             let locker = composer.get_locker();
-            let mut local_repo_ref = local_repo.borrow_mut();
-            let repo = local_repo_ref
-                .as_installed_repository_interface_mut()
-                .expect("local repository must be an InstalledRepositoryInterface");
-            autoload_generator.borrow_mut().dump(
+            autoload_generator.borrow().dump(
                 &config.borrow(),
-                repo,
+                local_repo.clone(),
                 package.clone(),
-                &mut *installation_manager.borrow_mut(),
+                installation_manager.clone(),
                 "composer",
                 optimize,
                 None,
-                Some(&mut *locker.borrow_mut()),
+                Some(locker.clone()),
                 false,
             )?;
         }