feat: git hooks integration

[AlexAtHome]

I added git hooks support so you can run git-cz on prepare-commit-msg.

To make it work, you should update .git/hooks/prepare-commit-msg with following code:

#!/bin/bash
exec < /dev/tty && git-cz --hook || true

# If `git-cz` and `commitizen` are installed locally, run this instead
exec < /dev/tty && node_modules/.bin/git-cz --hook || true

Same works with Husky:

{
  "husky": {
    "hooks": {
      "...": "...",
      "prepare-commit-msg": "exec < /dev/tty && node_modules/.bin/git-cz --hook || true",
    }
  }
}

Closes #79

[dnlfrst]

I would really appreciate this feature. Is there anything that prevents it from being merged?

---

Workaround in the mean time

1. Download the implementation provided by @mamoruuu (I appreciate your efforts! 🙌) in his fork.

2. In the downloaded fork, run:

   npm i
   npm i --save-dev yarn # Given, you do not have `yarn` globally available in your CLI.
   npm run build

3. In your repository, run:

   npm uninstall --save-dev git-cz
   npm i --save-dev /path/to/the/downloaded/fork # Use a relative path for portability.

[streamich]

Thanks! This is very nice.

[streamich]

We have --dry-run flag that prints the message to STDOUT, and now we have --hook flag that will write the message to /.git/COMMIT_EDITMSG, and by default it would execute git commit .... I'm thinking maybe we could unify all of those into a single argument:

git-cz --output=git
git-cz --output=stdout
git-cz --output=file --file=/.git/COMMIT_EDITMSG
git-cz --output=file --file=/.git/MERGE_MSG
git-cz --output=file --file=/.git/SQUASH_MSG

[streamich]

Would it be also useful to support /.git/MERGE_MSG and /.git/SQUASH_MSG?

[streamich]

🎉 This PR is included in version 4.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀