Bug: wrong common origin for buildroot package

[Mephistophiles]

Wrong common origin for buildroot package (sub repository):

$ exa -laT /tmp/main_repo/
drwxr-xr-x    - mzhukov 15 Mar 11:44 /tmp/main_repo
drwxr-xr-x    - mzhukov 15 Mar 11:43 ├── .git
.rw-r--r--    8 mzhukov 15 Mar 11:44 ├── .gitignore
drwxr-xr-x    - mzhukov 15 Mar 11:44 └── output
drwxr-xr-x    - mzhukov 15 Mar 11:44    └── subrepo
drwxr-xr-x    - mzhukov 15 Mar 11:44       ├── .git
.rw-r--r--    5 mzhukov 15 Mar 11:44       └── test.c

$ cat /tmp/main_repo/.gitignore
/output

If I try to watch test.c, watchexec determines the wrong common origin (watchexec always follows to top git repository, but the top repository can contain .gitignore with sub-repo path (as in my case)):

subrepo $ watchexec -v -w test.c 'echo 1'
2022-03-15T08:47:19.645143Z DEBUG watchexec::filterer::common: resolved all project origins origins={"/tmp/main_repo/output/subrepo", "/tmp/main_re
po"}
2022-03-15T08:47:19.645159Z DEBUG watchexec::filterer::common: resolved common/project origin project_origin="/tmp/main_repo"

• watchexec 1.18.7
• Archlinux
• watchexec.log
• subrepo $ watchexec -v -w test.c 'echo 1'

[passcod]

Hmm, that's a bit tricky. I would say the current situation is correct. It's correctly finding your project origin, that's just not what you wanted here. In 1.19 there'll be a new --project-origin flag to help with this situation.

Unfortunately, until that lands, there's no easy way to avoid this. You can use --no-vcs-ignore or --no-project-ignore to avoid loading that root (and others) ignore file.

Also note you should be doing this:

watchexec -w . -f test.c ...

Doing this automatically is covered by #190.

Also helpful would be CLI negative ignores, covered in #166. Negative ignores in ignore files do function, but don't help in this particular case.

---

However! you can exploit a current bug to do what you want, which is that using -w or not yields slightly different behaviour:

• watchexec -w . ... or watchexec -w test.c ...: project_origin = main_repo
• watchexec ... (without -w): project_origin = subrepo

This is a bug, but I'll fix it in 1.19 so that it coincides with the introduction of --project-origin ;)

[Mephistophiles]

Thanks for the detailed answer! watchexec -w . -f test.c ... works fine.