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>

2 files changed, 18 insertions, 32 deletions

diff --git a/crates/shirabe/src/command/dump_autoload_command.rs b/crates/shirabe/src/command/dump_autoload_command.rs
index 59295e23..8aad0705 100644
--- a/crates/shirabe/src/command/dump_autoload_command.rs
+++ b/crates/shirabe/src/command/dump_autoload_command.rs
@@ -188,10 +188,7 @@ impl Command for DumpAutoloadCommand {
             .as_bool()
             .unwrap_or(false)
         {
-            composer
-                .get_autoload_generator()
-                .borrow_mut()
-                .set_dry_run(true);
+            composer.get_autoload_generator().borrow().set_dry_run(true);
         }
         if input
             .borrow()
@@ -201,7 +198,7 @@ impl Command for DumpAutoloadCommand {
         {
             composer
                 .get_autoload_generator()
-                .borrow_mut()
+                .borrow()
                 .set_dev_mode(false);
         }
         if input.borrow().get_option("dev")?.as_bool().unwrap_or(false) {
@@ -221,24 +218,24 @@ impl Command for DumpAutoloadCommand {
             }
             composer
                 .get_autoload_generator()
-                .borrow_mut()
+                .borrow()
                 .set_dev_mode(true);
         }
         composer
             .get_autoload_generator()
-            .borrow_mut()
+            .borrow()
             .set_class_map_authoritative(authoritative);
         composer
             .get_autoload_generator()
-            .borrow_mut()
+            .borrow()
             .set_run_scripts(true);
         composer
             .get_autoload_generator()
-            .borrow_mut()
+            .borrow()
             .set_apcu(apcu, apcu_prefix);
         composer
             .get_autoload_generator()
-            .borrow_mut()
+            .borrow()
             .set_platform_requirement_filter(platform_requirement_filter);
         let strict_ambiguous = input
             .borrow()
@@ -256,22 +253,15 @@ impl Command for DumpAutoloadCommand {
         let autoload_generator = composer.get_autoload_generator();
 
         let config_ref = config.borrow();
-        let mut local_repo_ref = local_repo_handle.borrow_mut();
-        let local_repo = local_repo_ref
-            .as_installed_repository_interface_mut()
-            .expect("local repository must be an InstalledRepositoryInterface");
-        let mut installation_manager_ref = installation_manager.borrow_mut();
-        let mut locker_ref = locker.borrow_mut();
-
-        let class_map = autoload_generator.borrow_mut().dump(
+        let class_map = autoload_generator.borrow().dump(
             &config_ref,
-            local_repo,
+            local_repo_handle,
             package,
-            &mut *installation_manager_ref,
+            installation_manager,
             "composer",
             optimize,
             None,
-            Some(&mut *locker_ref),
+            Some(locker),
             strict_ambiguous,
         )?;
         let number_of_classes = class_map.map.len();
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,
             )?;
         }