diff rust/rhg/src/commands/status.rs @ 50215:ae61851e6fe2 stable

dirstate: add a way to test races happening during status

We add the `devel.sync.status.pre-dirstate-write-file` config option to easily
test what happens when other operations happen during the window where
`hg status` is done working but has not updated the cache on disk yet.

We introduce the framework for testing such races too, actual tests will be
added in the next changesets. For now the test is only checking dirstate-v1. We
will extend the test coverage later too.

Check test documentation for details.

Code change from Raphaël Gomès <[e-mail]>
Test change from Pierre-Yves David <[e-mail]>

--- a/rust/rhg/src/commands/status.rs	Tue Feb 28 00:01:41 2023 +0100
+++ b/rust/rhg/src/commands/status.rs	Tue Feb 28 15:25:47 2023 +0100
@@ -19,6 +19,7 @@
 use hg::manifest::Manifest;
 use hg::matchers::{AlwaysMatcher, IntersectionMatcher};
 use hg::repo::Repo;
+use hg::utils::debug::debug_wait_for_file;
 use hg::utils::files::get_bytes_from_os_string;
 use hg::utils::files::get_bytes_from_path;
 use hg::utils::files::get_path_from_bytes;
@@ -409,6 +410,13 @@
             after_status,
         )?;
 
+    // Development config option to test write races
+    if let Err(e) =
+        debug_wait_for_file(&config, "status.pre-dirstate-write-file")
+    {
+        ui.write_stderr(e.as_bytes()).ok();
+    }
+
     if (fixup.is_empty() || filesystem_time_at_status_start.is_none())
         && !dirstate_write_needed
     {