test: port 32 command/repository/downloader tests

Add create_installed_json/create_composer_lock test helpers. Port command (8),
repository path/forgejo/perforce/vcs (11), and fossil/hg/download_manager (13)
tests. Fix production porting bugs: root_package_loader/forgejo_url/version_bumper
regex delimiters, repository_manager create_repository_by_class, array_loader
isset, licenses_command RefCell borrow; implement disk_free_space and
touch2/touch3 via libc.

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

1 files changed, 6 insertions, 4 deletions

diff --git a/crates/shirabe/src/command/licenses_command.rs b/crates/shirabe/src/command/licenses_command.rs
index 3c1745a..3be4df3 100644
--- a/crates/shirabe/src/command/licenses_command.rs
+++ b/crates/shirabe/src/command/licenses_command.rs
@@ -107,8 +107,7 @@ impl Command for LicensesCommand {
         input: Rc<RefCell<dyn InputInterface>>,
         output: Rc<RefCell<dyn OutputInterface>>,
     ) -> anyhow::Result<i64> {
-        let composer = self.require_composer(None, None)?;
-        let mut composer = crate::command::composer_full_mut(&composer);
+        let composer_handle = self.require_composer(None, None)?;
 
         // TODO(plugin): dispatch COMMAND event for plugin hooks
         let command_event = CommandEvent::new(
@@ -117,11 +116,14 @@ impl Command for LicensesCommand {
             input.clone(),
             output.clone(),
         );
-        composer
-            .get_event_dispatcher()
+        // The event dispatcher reads back through the shared Composer handle (script listeners), so the
+        // dispatch must run while no other borrow of that handle is held.
+        let event_dispatcher = composer_handle.borrow_partial().get_event_dispatcher();
+        event_dispatcher
             .borrow_mut()
             .dispatch(Some(command_event.get_name()), None);
 
+        let mut composer = crate::command::composer_full_mut(&composer_handle);
         let root = composer.get_package();
 
         let packages = if input