Gommitlint

Gommitlint validates commit messages against best practices. Keep a clean Git history.

NOTE: In heavy dev-phase, don't use seriously yet.

Features

• Zero Configuration • Works out-of-the-box with sensible defaults
• Conventional Commits • Enforces standard commit message format
• CI/CD Ready • Multiple output formats for automation
• Git Hooks • Automatic validation before commits
• Flexible Rules • Enable/disable validation as needed
• Progressive Disclosure • Different verbosity levels for different use cases

Quick Start

Installation

# Install with Go
go install github.com/itiquette/gommitlint@latest

# Or download binary from releases
curl -L https://github.com/itiquette/gommitlint/releases/latest/download/gommitlint-linux-amd64 -o gommitlint
chmod +x gommitlint

Basic Usage

# Validate last commit
gommitlint validate

# Validate commit range
gommitlint validate --range=main..HEAD

# Install Git hook for automatic validation
gommitlint install-hook

Example Output

✓ Subject         Subject is 42 characters (max: 72)
✓ Conventional    Valid conventional commit format
✗ Signoff         Missing Signed-off-by line

FAIL: 1 of 3 rules passed

Common Use Cases

Git Hook Integration

# Automatic validation before each commit
gommitlint install-hook

CI/CD Pipeline

# GitHub Actions
- name: Validate commits
  run: |
    go install github.com/itiquette/gommitlint@latest
    gommitlint validate --base-branch=origin/${{ github.base_ref }} --format=github

Team Configuration

Create .gommitlint.yaml in your repository:

gommitlint:
  message:
    subject:
      max_length: 50
  rules:
    enabled:
      - commitbody      # Require detailed commit messages
    disabled:
      - signature       # Don't require GPG signatures

Validation Rules

Rule	Description	Default
subject	Subject line length and format	✓
conventional	Conventional Commits format	✓
signoff	Requires Signed-off-by line	✓
signature	Validates GPG/SSH signatures	✓
identity	Verifies committer identity	✓
branchahead	Limits commits ahead of main	✓
commitbody	Requires detailed commit body	✗
jirareference	Requires JIRA ticket references	✗
spell	Spell checking	✗

Output Formats

Progressive Verbosity

# Minimal output for CI
gommitlint validate

# Technical details for developers
gommitlint validate -v

# Educational guidance for learning
gommitlint validate -vv

Multiple Formats

# Human-readable (default)
gommitlint validate --format=text

# Machine-readable for automation
gommitlint validate --format=json

# CI/CD integration
gommitlint validate --format=github   # GitHub Actions
gommitlint validate --format=gitlab   # GitLab CI

Exit Codes

• 0 • All validations passed
• 1 • Configuration or system error
• 2 • Validation failures found

Perfect for automation and CI/CD pipelines.

Documentation

• Usage Guide • Complete configuration and examples
• Architecture • Design principles and implementation
• Configuration Examples • All available options

Contributing

We welcome contributions! See our Contributing Guide for details on:

• Reporting bugs
• Suggesting improvements
• Submitting pull requests
• Testing and feedback

License

• Code: EUPL 1.2
• Documentation: CC0 1.0

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