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, 9 insertions, 9 deletions

diff --git a/crates/shirabe/src/command/check_platform_reqs_command.rs b/crates/shirabe/src/command/check_platform_reqs_command.rs
index 0f18557..2ab66c5 100644
--- a/crates/shirabe/src/command/check_platform_reqs_command.rs
+++ b/crates/shirabe/src/command/check_platform_reqs_command.rs
@@ -48,7 +48,7 @@ impl Default for CheckPlatformReqsCommand {
 
 impl CheckPlatformReqsCommand {
     pub fn new() -> Self {
-        let mut command = CheckPlatformReqsCommand {
+        let command = CheckPlatformReqsCommand {
             base_command_data: BaseCommandData::new(None),
         };
         command
@@ -58,7 +58,7 @@ impl CheckPlatformReqsCommand {
     }
 
     fn print_table(
-        &mut self,
+        &self,
         output: std::rc::Rc<std::cell::RefCell<dyn OutputInterface>>,
         results: &[CheckResult],
         format: &str,
@@ -154,7 +154,7 @@ impl CheckPlatformReqsCommand {
 }
 
 impl Command for CheckPlatformReqsCommand {
-    fn configure(&mut self) -> anyhow::Result<()> {
+    fn configure(&self) -> anyhow::Result<()> {
         self.set_name("check-platform-reqs")?;
         self.set_description("Check that platform requirements are satisfied");
         self.set_definition(&[
@@ -195,7 +195,7 @@ impl Command for CheckPlatformReqsCommand {
     }
 
     fn execute(
-        &mut self,
+        &self,
         input: Rc<RefCell<dyn InputInterface>>,
         _output: Rc<RefCell<dyn OutputInterface>>,
     ) -> anyhow::Result<i64> {
@@ -403,7 +403,7 @@ impl Command for CheckPlatformReqsCommand {
     }
 
     fn initialize(
-        &mut self,
+        &self,
         input: Rc<RefCell<dyn InputInterface>>,
         output: Rc<RefCell<dyn OutputInterface>>,
     ) -> anyhow::Result<()> {
@@ -414,10 +414,10 @@ impl Command for CheckPlatformReqsCommand {
 }
 
 impl BaseCommand for CheckPlatformReqsCommand {
-    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);