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module Overcommit::Hook::PreCommit

# Runs `w3c_validators` against any modified CSS files.

# @see https://github.com/alexdunae/w3c_validators

class W3cCss < Base

def run

collect_messages

rescue W3CValidators::ParsingError,

W3CValidators::ValidatorUnavailable => e

[:fail, e.message]

end

private

def collect_messages

applicable_files.collect do |path|

results = validator.validate_file(path)

messages = results.errors + results.warnings

messages.collect do |msg|

# Some warnings are not per-line, so use 0 as a default

line = Integer(msg.line || 0)

# Build message by hand to reduce noise from the validator response

text = "#{msg.type.to_s.upcase}; URI: #{path}; line #{line}: #{msg.message.strip}"

Overcommit::Hook::Message.new(msg.type, path, line, text)

end

end.flatten

end

def validator

unless @validator

@validator = W3CValidators::CSSValidator.new(opts)

@validator.set_language!(language) unless language.nil?

@validator.set_profile!(profile) unless profile.nil?

@validator.set_warn_level!(warn_level) unless warn_level.nil?

end

@validator

end

def opts

@opts ||= {

validator_uri: config['validator_uri'],

proxy_server: config['proxy_server'],

proxy_port: config['proxy_port'],

proxy_user: config['proxy_user'],

proxy_pass: config['proxy_pass']

}

end

def language

@language ||= config['language']

end

# Values specified at

# http://www.rubydoc.info/gems/w3c_validators/1.2/W3CValidators#CSS_PROFILES

def profile

@profile ||= config['profile']

end

# One of 0, 1, 2, 'no'

def warn_level

@warn_level ||= config['warn_level']

end

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