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Lefthook

The fastest polyglot Git hooks manager out there

Fast and powerful Git hooks manager for Node.js, Ruby or any other type of projects.

  • Fast. It is written in Go. Can run commands in parallel.
  • Powerful. With a few lines in the config you can check only the changed files on pre-push hook.
  • Simple. It is single dependency-free binary which can work in any environment.

📖 Read the introduction post

# On `git push` lefthook will run spelling and links check for all of the changed files
pre-push:
  parallel: true
  commands:
    spelling:
      files: git diff --name-only HEAD @{push}
      glob: "*.md"
      run: npx yaspeller {files}
    check-links:
      files: git diff --name-only HEAD @{push}
      glob: "*.md"
      run: npx markdown-link-check {files}
Sponsored by Evil Martians

Usage

Choose your environment:

Then you can find all Lefthook features in the full guide and explore wiki.

Why Lefthook

  • Parallel execution

If you want more speed. Example

pre-push:
  parallel: true

  • Flexible list of files

If you want your own list. Custom and prebuilt examples.

pre-commit:
  commands:
    frontend-linter:
      run: yarn eslint {staged_files}
    backend-linter:
      run: bundle exec rubocop --force-exclusion {all_files}
    frontend-style:
      files: git diff --name-only HEAD @{push}
      run: yarn stylelint {files}

  • Glob and regexp filters

If you want to filter list of files. You could find more glob pattern examples here.

pre-commit:
  commands:
    backend-linter:
      glob: "*.rb" # glob filter
      exclude: "application.rb|routes.rb" # regexp filter
      run: bundle exec rubocop --force-exclusion {all_files}

  • Execute in sub-directory

If you want to execute the commands in a relative path

pre-commit:
  commands:
    backend-linter:
      root: "api/" # Careful to have only trailing slash
      glob: "*.rb" # glob filter
      run: bundle exec rubocop {all_files}

  • Run scripts

If oneline commands are not enough, you can execute files. Example.

commit-msg:
  scripts:
    "template_checker":
      runner: bash

  • Tags

If you want to control a group of commands. Example.

pre-push:
  commands:
    packages-audit:
      tags: frontend security
      run: yarn audit
    gems-audit:
      tags: backend security
      run: bundle audit

  • Support Docker

If you are in the Docker environment. Example.

pre-commit:
  scripts:
    "good_job.js":
      runner: docker run -it --rm <container_id_or_name> {cmd}

  • Local config

If you a frontend/backend developer and want to skip unnecessary commands or override something into Docker. Description.

# lefthook-local.yml
pre-push:
  exclude_tags:
    - frontend
  commands:
    packages-audit:
      skip: true

  • Direct control

If you want to run hooks group directly.

$ lefthook run pre-commit

  • Your own tasks

If you want to run specific group of commands directly.

fixer:
  commands:
    ruby-fixer:
      run: bundle exec rubocop --force-exclusion --safe-auto-correct {staged_files}
    js-fixer:
      run: yarn eslint --fix {staged_files}
$ lefthook run fixer

  • Optional output

If you don't want to see supporting information:

skip_output:
  - meta #(version and which hook running)
  - success #(output from runners with exit code 0)

Table of contents:

Guides

Migrate from

Examples

Benchmarks

Comparison list

Articles