Sapling should interop with Jest --watch mode

[steveluscher]

The testing library Jest has a mode where it can run tests related to changed files, according to the SCM.

I wonder if Sapling could provide some sort of reasonable ‘API compatibility’ with git by synthesizing just enough of the .git folder to be useful. That way tools that look for a .git folder would Just Work™ (see also #556).

Problem

jest --watch

…yields the following error:

Determining test suites to run...
--watch is not supported without git/hg, please use --watchAll

[fanzeyi]

Do you want to open an issue in jest repo? They probably just need to recognize Sapling and they probably have Watchman support already.

[fanzeyi]

Looks like there is some basic support in Jest already: jestjs/jest#13674

[fanzeyi]

aaaaaaand I found jestjs/jest#13941

You should try updating Jest to 29.5.0.

[muirdm]

Closing assuming the above mentioned support in jest is sufficient.

[steveluscher]

And me, here, on the ancient 29.4.2. 😂

Thanks for doing my Googling for me; sorry to waste your time! :/