Class: Overcommit::Hook::PreCommit::EsLint

Inherits:
Base
  • Object
show all
Defined in:
lib/overcommit/hook/pre_commit/es_lint.rb

Overview

Runs ‘eslint` against any modified JavaScript files.

Protip: if you have an npm script set up to run eslint, you can configure this hook to run eslint via your npm script by using the ‘command` option in your .overcommit.yml file. This can be useful if you have some eslint configuration built into your npm script that you don’t want to repeat somewhere else. Example:

EsLint:
  required_executable: 'npm'
  enabled: true
  command: ['npm', 'run', 'lint', '--', '-f', 'compact']

Note: This hook supports only compact format.

See Also:

Instance Attribute Summary

Attributes inherited from Base

#config

Instance Method Summary collapse

Methods inherited from Base

#applicable_files, #command, #description, #enabled?, #excluded?, #execute, #execute_in_background, #flags, #in_path?, #included_files, #initialize, #name, #parallelize?, #processors, #quiet?, #required?, #required_executable, #required_libraries, #run?, #run_and_transform, #skip?

Constructor Details

This class inherits a constructor from Overcommit::Hook::Base

Instance Method Details

#run ⇒ Object 



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# File 'lib/overcommit/hook/pre_commit/es_lint.rb', line 21

def run
  eslint_regex = /^(?<file>[^\s](?:\w:)?[^:]+):[^\d]+(?<line>\d+).*?(?<type>Error|Warning)/
  result = execute(command, args: applicable_files)
  output = result.stdout.chomp
  messages = output.split("\n").grep(eslint_regex)

  return [:fail, result.stderr] if messages.empty? && !result.success?
  return :pass if result.success? && output.empty?

  # example message:
  #   path/to/file.js: line 1, col 0, Error - Error message (ruleName)
  extract_messages(messages, eslint_regex, lambda { |type| type.downcase.to_sym })
end