RuboCop on diff for Ruby files + ES6 syntax checker for JavaScript files + ERB template support: lint only what's new/changed

group :development, :test
  gem 'ccru', require: false
end

# Commit your code
git add some_files
git commit -m "commit message"

# Check changed Ruby, JavaScript, and ERB files in git diff (compared to merge-base)
bundle exec ccru

# Check specific files (No need commit)
bundle exec ccru path/to/file.rb path/to/script.js path/to/template.erb

# Set default base branch for git diff comparison
export CCRU_BASE=develop
bundle exec ccru

• Ruby files: .rb - Checked with RuboCop
• JavaScript files: .js - Checked for ES6 syntax violations + code quality
• ERB templates: .erb - Checked with custom ERB linter for conventions

• Automatically checks ERB conventions and formatting
• Validates proper spacing: <% code %> instead of <%code%>
• Checks comment format: <%# comment %> instead of <% # comment %>
• Ensures proper output spacing: <%= code %> instead of <%=code%>
• Maps violations back to original ERB line numbers

The following ES6+ syntax patterns are detected and flagged as errors:

• Arrow functions: => syntax
• const/let: const and let declarations
• Template literals: `string ${variable}`
• Destructuring: { prop } = obj assignments
• Spread operator: ... syntax
• ES6 classes: class declarations
• ES6 modules: import/export statements
• Default parameters: function(param = value)
• Rest parameters: function(...args)

• Trailing whitespace: Detects spaces at end of lines
• Missing final newline: Ensures files end with newline
• Line length: Maximum line length checking (120 characters)

• Console statements: Warns about console.log, console.debug, etc.
• Eval usage: Errors on dangerous eval() calls
• With statement: Errors on deprecated with statements
• Document write: Warns about document.write() usage

• Loose equality: Warns about == vs === usage (allows == null and == undefined)
• Loose inequality: Warns about != vs !== usage
• Unused variables: Detects potentially unused variable declarations
• Missing semicolons: Identifies missing semicolons (with smart detection)
• Inline comments: Warns about inline comments at end of code lines

• innerHTML usage: Warns about potential XSS vulnerabilities
• Global variables: Warns about global scope pollution

This project is licensed under the MIT License.