Postinstall hook fails on heroku deployments (0.68.0)

Description

The installation / compilation fails on heroku deployments. It seems to happen, because the slug-preparation happens in a temp folder, that is not a GIT repo

Steps to Reproduce

Try installing mathlive in a non-GIT folder and it should fail.

Like:

$ mkdir blub
$ cd blub
$ yarn init
$ yarn add mathlive@0.68.0
info No lockfile found.
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
[4/4] 🔨  Building fresh packages...
error /blub/node_modules/mathlive: Command failed.
Exit code: 128
Command: git config core.hooksPath ./git-hooks
Arguments:
Directory: blub/node_modules/mathlive
Output:
fatal: not in a git directory

Workaround

Running git init seems to fix this issue.

Actual Behavior

remote: [4/4] Building fresh packages...
remote: error /tmp/build_0d633e20/typescript/node_modules/mathlive: Command failed.
remote: Exit code: 128
remote: Command: git config core.hooksPath ./git-hooks
remote: Arguments:
remote: Directory: /tmp/build_0d633e20/typescript/node_modules/mathlive
remote: Output:
remote: fatal: not in a git directory

The command listed seems to be coming from https://github.com/arnog/mathlive/blob/master/package.json#L25

"postinstall": "git config core.hooksPath ./git-hooks"

Expected Behavior

It should compile correctly, as it did previously.

Environment

MathLive version 0.68.0

[mindreframer]

@arnog Thanks for the quick response!

I can totally relate to the pain of using Git submodules, there are so many gotchas… I hope this is not a big and dramatic change, since this is also a concern to everyone who is not using Git for version control (unlikely, but still possible).

Looking forward to use the fixed version and thank you a lot for this monumental effort of maintaining mathlive!

[mindreframer]

Thanks!