So I went into a rabbit hole of setting up Husky’s git hooks with Lerna and realized that there wasn’t a straightforward guide to setting up the latest version of Husky with Lerna. So here goes. The following setup steps are yarn specific. You can replace yarn with npm for step 1 and replace yarn with npx for all the other steps. 1. Install Husky yarn add --dev -W husky Install Husky as a dev dependency on your project root 2. Install Husky’s git hooks yarn husky install Git hooks are actually a Git feature and not a Husky feature (something I did not know). So when you run the above command, Husky will change the git hooks directory from in your project root (where you will find samples from git about what you can do with hooks) to . You can read more about what git hooks are available . .git/hooks .husky/ here You can verify that this install was successful by checking if the hook’s path was successfully changed git config core.hooksPath Should return .husky 3. Test if hooks are being called You can customize a git hook in Husky using the following command: yarn husky add .husky/pre-commit "yarn test" You can now see that a new file has been created . To quickly verify that this is indeed working, you can edit the file to print something and exit. .husky/pre-commit echo "Hello World"
exit 1 Now add and commit the files that were created in your .husky directory to test the pre-commit hooks. git add .husky/pre-commit
git commit -m "Test commit" This should print “Hello World” and then not commit the files (because we returned exit code 1 from the pre-commit hook). 4. Supporting git hooks for multiple packages You can set up the root pre-commit and pre-push hooks in such a way that it works well with multiple packages. From the root of the project, add pre-commit and pre-push hooks: yarn husky add .husky/pre-commit "yarn lerna run pre-commit"
yarn husky add .husky/pre-push "yarn lerna run pre-push" This allows you to setup package specific and steps by adding to the packages in the like this: pre-commit pre-push scripts package.json // packages/package-1/package.json
{
  ...
  "scripts": {
    ...
    "pre-push": "yarn lint-changed; yarn test-changed",
    ...
  }
  ...
} 5. Setting up commitlint to lint your commit messages Install along with lerna specific peer dependencies commitlint yarn add --dev -W @commitlint/cli @commitlint/config-conventional \\
@commitlint/config-lerna-scopes Add the hook to husky commit-message yarn husky add .husky/commit-message "yarn commitlint --edit $1"

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Setting Up Husky 8 With Lerna

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