typicodeHusky
Git hooks made easy
Husky can prevent bad git commit, git push and more 🐶 woof!
Install
npm install husky --save-dev// package.json
{
"husky": {
"hooks": {
"pre-commit": "npm test",
"pre-push": "npm test",
"...": "..."
}
}
}git commit -m 'Keep calm and commit'Existing hooks are kept. Requires Node >= 10 and Git >= 2.13.0.
Reinstall
If Husky is already in your node_modules or pnp.js (Yarn 2) and you want to reinstall hooks, you can run npm rebuild or yarn rebuild.
Uninstall
npm uninstall huskyGit hooks installed by husky will be removed.
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Individuals
Used by
- webpack
- babel
- create-react-app
- ... and many other awesome projects
Guides
- Upgrading from 0.14
- Supported hooks
- Access Git params and stdin
- Skip all hooks (rebase)
- Disable auto-install
- CI servers
- Monorepos
- Node version managers
- Local commands (~/.huskyrc)
- Multiple commands
- Troubleshoot
Upgrading from 0.14
Run husky-upgrade to automatically upgrade your configuration:
npx --no-install husky-upgradeYou can also do it manually. Move your existing hooks to husky.hooks field and use raw Git hooks names. Also, if you were using GIT_PARAMS env variable, rename it to HUSKY_GIT_PARAMS.
{
"scripts": {
- "precommit": "npm test",
- "commitmsg": "commitlint -E GIT_PARAMS"
},
+ "husky": {
+ "hooks": {
+ "pre-commit": "npm test",
+ "commit-msg": "commitlint -E HUSKY_GIT_PARAMS"
+ }
+ }
}Starting with 1.0.0, husky can be configured using .huskyrc, .huskyrc.json, .huskyrc.yaml, huskyrc.yml, .huskyrc.js or husky.config.js file.
// .huskyrc
{
"hooks": {
"pre-commit": "npm test"
}
}Supported hooks
Husky supports all Git hooks defined here. Server-side hooks (pre-receive, update and post-receive) aren't supported.
Access Git params and stdin
Git hooks can get parameters via command-line arguments and stdin. Husky makes them accessible via HUSKY_GIT_PARAMS and HUSKY_GIT_STDIN environment variables.
"commit-msg": "echo $HUSKY_GIT_PARAMS"Skip all hooks (rebase)
During a rebase you may want to skip all hooks, you can use HUSKY_SKIP_HOOKS environment variable.
HUSKY_SKIP_HOOKS=1 git rebase ...Disable auto-install
If you don't want husky to automatically install Git hooks, simply set HUSKY_SKIP_INSTALL environment variable.
HUSKY_SKIP_INSTALL=1 npm installCI servers
By default, Husky won't install on CI servers.
Monorepos
If you have a multi-package repository, it's recommended to use tools like lerna and have husky installed ONLY in the root package.json to act as the source of truth.
Generally speaking, you should AVOID defining husky in multiple package.json, as each package would overwrite previous husky installation.
.
└── root
├── .git
├── package.json 🐶 # Add husky here
└── packages
├── A
│ └── package.json
├── B
│ └── package.json
└── C
└── package.json// root/package.json
{
"private": true,
"devDependencies": {
"husky": "..."
},
"husky": {
"hooks": {
"pre-commit": "lerna run test"
}
}
}Node version managers
If you're on Windows, husky will simply use the version installed globally on your system.
For macOS and Linux users:
- if you're running
gitcommands in the terminal, husky will use the version defined in your shellPATH. In other words, if you're anvmuser, husky will use the version that you've set withnvm. - if you're using a GUI client and
nvm, it may have a differentPATHand not loadnvm, in this case the highestnodeversion installed bynvmwill usually be picked. You can also check~/.node_pathto see which version is used by GUIs and edit if you want to use something else.
Local commands (~/.huskyrc)
Husky will source ~/.huskyrc file if it exists before running hook scripts.
You can use it, for example, to load a node version manager or run some shell commands before hooks.
# ~/.huskyrc
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"Multiple commands
By design and just like scripts defined in package.json, husky will run hook scripts as a single command.
"pre-commit": "cmd && cmd"That said, if you prefer to use an array, the recommended approach is to define them in .huskyrc.js or husky.config.js.
const tasks = arr => arr.join(' && ')
module.exports = {
'hooks': {
'pre-commit': tasks([
'cmd',
'cmd'
])
}
}Tools like npm-run-all can help too.
Troubleshoot
Debug messages
HUSKY_DEBUG=1 can provide additional information when running commands.
HUSKY_DEBUG=1 npm install husky --save-dev
HUSKY_DEBUG=1 git commit ...Hooks aren't running
Check if hooks were installed. Verify that .git/hooks/pre-commit exists and have husky code. It should start with:
#!/bin/sh
# husky...If not, you may have another Git hooks manager defined in your package.json overwriting husky's hooks. Check also the output during install, you should see:
husky > Setting up git hooks
husky > DoneCommits aren't blocked
For a commit to be blocked, pre-commit script must exit with a non-zero exit code. If you commit isn't blocked, check your script exit code.
Commits are slow
Husky is fast and only adds a few tenth of seconds to commits (~0.3s on a low-end PC). So it's most probably related to how many things are done during pre-commit. You can often improve this by using cache on your tools (babel, eslint, ...) and using lint-staged.
Testing husky in a new repo
To isolate your issue, you can also create a new repo:
mkdir foo && cd foo
git init && npm init -y
npm install husky --save-dev
# Add a failing pre-commit hook to your package.json:
# "pre-commit": "echo \"this should fail\" && exit 1"
# Make a commitENOENT error 'node_modules/husky/.git/hooks'
Verify that your version of Git is >=2.13.0.
See also
- pkg-ok - Prevents publishing a module with bad paths or incorrect line endings
- please-upgrade-node - Show a message to upgrade Node instead of a stacktrace in your CLIs
- pinst - dev only postinstall hook
Patreon
People and companies supporting via Patreon: thanks
License
MIT