refactor(composer): represent composer via trait-based handlesrefactor/composer-handles

Replace the PartialComposer/Composer structs and the single
Rc<RefCell<PartialOrFullComposer>> enum with PartialComposer and
Composer traits (Composer: PartialComposer), InnerPartialComposer /
InnerFullComposer data structs, and the handle types FullComposerHandle
(impl Composer) and AnyComposerHandle (polymorphic enum, impl
PartialComposer), plus their weak variants.

Factory builds the full and partial graphs via separate Rc::new_cyclic
branches that share a build_composer_base helper. Call sites now use
trait methods that encapsulate borrowing instead of borrow_partial() /
composer_full*().

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/crates/shirabe/src/command/require_command.rs b/crates/shirabe/src/command/require_command.rs
index bf5f159..27626e7 100644
--- a/crates/shirabe/src/command/require_command.rs
+++ b/crates/shirabe/src/command/require_command.rs
@@ -17,7 +17,7 @@ use shirabe_php_shim::{
 use crate::advisory::Auditor;
 use crate::command::PackageDiscoveryTrait;
 use crate::command::{BaseCommand, BaseCommandData, HasBaseCommandData};
-use crate::composer::PartialComposerHandle;
+use crate::composer::{AnyComposerHandle, Composer, PartialComposer};
 use crate::console::input::InputArgument;
 use crate::console::input::InputOption;
 use crate::dependency_resolver::Request;
@@ -72,7 +72,7 @@ impl PackageDiscoveryTrait for RequireCommand {
         todo!()
     }
 
-    fn try_composer(&self) -> Option<PartialComposerHandle> {
+    fn try_composer(&self) -> Option<AnyComposerHandle> {
         todo!()
     }
 
@@ -80,7 +80,7 @@ impl PackageDiscoveryTrait for RequireCommand {
         &self,
         disable_plugins: Option<bool>,
         disable_scripts: Option<bool>,
-    ) -> PartialComposerHandle {
+    ) -> AnyComposerHandle {
         todo!()
     }
 
@@ -688,7 +688,7 @@ impl RequireCommand {
         // Update packages
         self.reset_composer()?;
         let composer_handle = self.require_composer(None, None)?;
-        let mut composer = crate::command::composer_full_mut(&composer_handle);
+        let composer = crate::command::composer_full(&composer_handle);
 
         self.dependency_resolution_completed = false;
         // TODO(phase-b): add_listener expects a Callable enum; PHP closure should set
@@ -930,7 +930,7 @@ impl RequireCommand {
         fixed: bool,
     ) -> Result<i64> {
         let composer = self.require_composer(None, None)?;
-        let mut composer = crate::command::composer_full_mut(&composer);
+        let composer = crate::command::composer_full(&composer);
         let locker_is_locked = composer.get_locker().borrow_mut().is_locked();
         let mut requirements: IndexMap<String, String> = IndexMap::new();
         let mut version_selector = VersionSelector::new(