Message Commit hook doesn't work with git gui

[bachp]

Using the recommended husky commit message hook doesn't work with git gui.

 {
    "scripts": {
      "commitmsg": "conventional-changelog-lint -e"
    }
  }

The issue is that -e assumes the commit message is at .git/COMMIT_EDITMSG which is not always true.
git gui for example places the commit message at .git/GITGUI_EDITMESSAGE.
Looking at the sample commit-msg hook from Git it specifies that the location of the file containing the commit message is passed as first argument $1.

To make this work I think there are two changes necessary:

1. make -e accept an argument
2. change the husky hook to "commitmsg": "conventional-changelog-lint -e $GIT_PARAMS"

Point two is required as husky doesn't pass the arguments directly but instead puts them into an environment variable GIT_PARAMS.

[marionebl]

Thanks for raising this @bachp.

We should implement this in a non-breaking fashion by defaulting to .git/COMMIT_EDITMSG if no argument is passed to -e.

Your suggested changes make a lot of sense – a PR would be very welcome if you'd like to contribute.

[bachp]

I found another way to make it work: conventional-changelog-lint < $1
In case somebody needs this until I'm able to do a MR.

[marionebl]

Fix version is https://github.com/marionebl/commitlint/releases/tag/v4.2.0