fix(console): make Command/BaseCommand methods take &self

The Command trait and Composer's BaseCommand took &mut self, so dispatch
held a borrow_mut on the command's RefCell for the whole call. A command
re-entering itself (e.g. the help command describing itself) then panicked
with "RefCell already borrowed".

All Command/BaseCommand methods now take &self and the command state is
interior-mutable (Cell/RefCell). Shared borrows coexist, so re-entrant
describe paths no longer conflict. Getters that returned references now
return Ref guards; the descriptor describe_* methods take &dyn Command;
mixin accessors return Ref/RefMut.

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

1 files changed, 8 insertions, 8 deletions

diff --git a/crates/shirabe/src/command/suggests_command.rs b/crates/shirabe/src/command/suggests_command.rs
index eb4e05d..4bd0758 100644
--- a/crates/shirabe/src/command/suggests_command.rs
+++ b/crates/shirabe/src/command/suggests_command.rs
@@ -37,7 +37,7 @@ impl Default for SuggestsCommand {
 
 impl SuggestsCommand {
     pub fn new() -> Self {
-        let mut command = SuggestsCommand {
+        let command = SuggestsCommand {
             base_command_data: BaseCommandData::new(None),
         };
         command
@@ -48,7 +48,7 @@ impl SuggestsCommand {
 }
 
 impl Command for SuggestsCommand {
-    fn configure(&mut self) -> anyhow::Result<()> {
+    fn configure(&self) -> anyhow::Result<()> {
         // TODO(cli-completion): suggest_installed_package() for `packages` argument
         self.set_name("suggests")?;
         self.set_description("Shows package suggestions");
@@ -114,7 +114,7 @@ impl Command for SuggestsCommand {
     }
 
     fn execute(
-        &mut self,
+        &self,
         input: Rc<RefCell<dyn InputInterface>>,
         _output: Rc<RefCell<dyn OutputInterface>>,
     ) -> Result<i64> {
@@ -220,7 +220,7 @@ impl Command for SuggestsCommand {
     }
 
     fn initialize(
-        &mut self,
+        &self,
         input: Rc<RefCell<dyn InputInterface>>,
         output: Rc<RefCell<dyn OutputInterface>>,
     ) -> anyhow::Result<()> {
@@ -231,10 +231,10 @@ impl Command for SuggestsCommand {
 }
 
 impl BaseCommand for SuggestsCommand {
-    fn command_data_mut(
-        &mut self,
-    ) -> &mut shirabe_external_packages::symfony::console::command::command::CommandData {
-        self.base_command_data.command_data_mut()
+    fn command_data(
+        &self,
+    ) -> &shirabe_external_packages::symfony::console::command::command::CommandData {
+        self.base_command_data.command_data()
     }
 
     crate::delegate_base_command_trait_impls_to_inner!(base_command_data);