feat(filter): share platform req filter via Rc, drop clone_box

PlatformRequirementFilterInterface::clone_box (a todo!() trait-object
clone stub) is removed in favor of Rc<dyn ...> shared ownership, matching
PHP's by-reference sharing of the single filter object. Box<dyn ...> is
replaced with Rc<dyn ...> across the factory, Solver/RuleSetGenerator,
VersionSelector, AutoloadGenerator, Installer and the command layer
(BaseCommand/PackageDiscoveryTrait and their impls); clone_box call
sites become Rc clones.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

5 files changed, 13 insertions, 9 deletions

diff --git a/crates/shirabe/src/command/base_command.rs b/crates/shirabe/src/command/base_command.rs
index f806854..501915b 100644
--- a/crates/shirabe/src/command/base_command.rs
+++ b/crates/shirabe/src/command/base_command.rs
@@ -221,7 +221,7 @@ pub trait BaseCommand {
     fn get_platform_requirement_filter(
         &self,
         input: &dyn InputInterface,
-    ) -> Result<Box<dyn PlatformRequirementFilterInterface>>;
+    ) -> Result<std::rc::Rc<dyn PlatformRequirementFilterInterface>>;
 
     /// @param array<string> $requirements
     ///
@@ -585,7 +585,7 @@ impl<C: HasBaseCommandData> BaseCommand for C {
     fn get_platform_requirement_filter(
         &self,
         input: &dyn InputInterface,
-    ) -> Result<Box<dyn PlatformRequirementFilterInterface>> {
+    ) -> Result<std::rc::Rc<dyn PlatformRequirementFilterInterface>> {
         if !input.has_option("ignore-platform-reqs") || !input.has_option("ignore-platform-req") {
             return Err(LogicException {
                 message:
diff --git a/crates/shirabe/src/command/create_project_command.rs b/crates/shirabe/src/command/create_project_command.rs
index 1667ac1..076d7cd 100644
--- a/crates/shirabe/src/command/create_project_command.rs
+++ b/crates/shirabe/src/command/create_project_command.rs
@@ -222,7 +222,7 @@ impl CreateProjectCommand {
         disable_scripts: bool,
         no_progress: bool,
         no_install: bool,
-        platform_requirement_filter: Option<Box<dyn PlatformRequirementFilterInterface>>,
+        platform_requirement_filter: Option<std::rc::Rc<dyn PlatformRequirementFilterInterface>>,
         secure_http: bool,
         add_repository: bool,
     ) -> Result<i64> {
@@ -389,7 +389,7 @@ impl CreateProjectCommand {
                 .set_prefer_source(prefer_source)
                 .set_prefer_dist(prefer_dist)
                 .set_dev_mode(install_dev_packages)
-                .set_platform_requirement_filter(platform_requirement_filter.clone_box())
+                .set_platform_requirement_filter(platform_requirement_filter.clone())
                 .set_suggested_packages_reporter(SuggestedPackagesReporter::new(io.clone()))
                 .set_optimize_autoloader(
                     config
diff --git a/crates/shirabe/src/command/init_command.rs b/crates/shirabe/src/command/init_command.rs
index 053df36..e401534 100644
--- a/crates/shirabe/src/command/init_command.rs
+++ b/crates/shirabe/src/command/init_command.rs
@@ -73,8 +73,9 @@ impl PackageDiscoveryTrait for InitCommand {
     fn get_platform_requirement_filter(
         &self,
         input: &dyn InputInterface,
-    ) -> Box<dyn crate::filter::platform_requirement_filter::PlatformRequirementFilterInterface>
-    {
+    ) -> std::rc::Rc<
+        dyn crate::filter::platform_requirement_filter::PlatformRequirementFilterInterface,
+    > {
         todo!()
     }
 
diff --git a/crates/shirabe/src/command/package_discovery_trait.rs b/crates/shirabe/src/command/package_discovery_trait.rs
index 197636c..eba6b8b 100644
--- a/crates/shirabe/src/command/package_discovery_trait.rs
+++ b/crates/shirabe/src/command/package_discovery_trait.rs
@@ -50,7 +50,9 @@ pub trait PackageDiscoveryTrait {
     fn get_platform_requirement_filter(
         &self,
         input: &dyn InputInterface,
-    ) -> Box<dyn crate::filter::platform_requirement_filter::PlatformRequirementFilterInterface>;
+    ) -> std::rc::Rc<
+        dyn crate::filter::platform_requirement_filter::PlatformRequirementFilterInterface,
+    >;
 
     fn normalize_requirements(&self, requires: Vec<String>) -> Vec<IndexMap<String, String>>;
 
diff --git a/crates/shirabe/src/command/require_command.rs b/crates/shirabe/src/command/require_command.rs
index fa9a3dc..cfa7bba 100644
--- a/crates/shirabe/src/command/require_command.rs
+++ b/crates/shirabe/src/command/require_command.rs
@@ -88,8 +88,9 @@ impl PackageDiscoveryTrait for RequireCommand {
     fn get_platform_requirement_filter(
         &self,
         input: &dyn InputInterface,
-    ) -> Box<dyn crate::filter::platform_requirement_filter::PlatformRequirementFilterInterface>
-    {
+    ) -> std::rc::Rc<
+        dyn crate::filter::platform_requirement_filter::PlatformRequirementFilterInterface,
+    > {
         todo!()
     }