Merge #1174

1174: improve cargo watch r=matklad a=vemoo

- Add start and stop commands
- Cleanup trypescript code to avoid definite assignment assertions (`!` after possibly undefined value)
- Recover `rustc-watch` problem matcher because it's still useful, can be used with any command, for example `cargo test`

Co-authored-by: Bernardo <[email protected]>

1 files changed, 8 insertions, 0 deletions

diff --git a/docs/user/features.md b/docs/user/features.md
index 09a7f5a43..cffbb4c7f 100644
--- a/docs/user/features.md
+++ b/docs/user/features.md
@@ -76,6 +76,14 @@ Shows internal statistic about memory usage of rust-analyzer
 
 Manually triggers GC
 
+#### Start Cargo Watch
+
+Start `cargo watch` for live error highlighting. Will prompt to install if it's not already installed.
+
+#### Stop Cargo Watch
+
+Stop `cargo watch`
+
 ### Code Actions (Assists)
 
 These are triggered in a particular context via light bulb. We use custom code on