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Versions: 11
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Contents
# encoding: utf-8
require 'open3'
# The reincarnation of syntax cop :)
module MRISyntaxChecker
module_function
def offences_for_source(source, fake_cop_name = 'Syntax', grep_message = nil)
if source.is_a?(Array)
source_lines = source
source = source_lines.join("\n")
else
source_lines = source.each_line.to_a
end
source_buffer = Parser::Source::Buffer.new('test', 1)
source_buffer.source = source
offences = []
check_syntax(source).each_line do |line|
line_number, severity, message = process_line(line)
next unless line_number
next if grep_message && !message.include?(grep_message)
begin_pos = source_lines[0...(line_number - 1)].reduce(0) do |a, e|
a + e.length + "\n".length
end
offences << Rubocop::Cop::Offence.new(
severity,
Parser::Source::Range.new(source_buffer, begin_pos, begin_pos + 1),
message.capitalize,
fake_cop_name
)
end
offences
end
def check_syntax(source)
fail 'Must be running with MRI' unless RUBY_ENGINE == 'ruby'
stdin, stderr, thread = nil
# It's extremely important to run the syntax check in a
# clean environment - otherwise it will be extremely slow.
if defined? Bundler
Bundler.with_clean_env do
stdin, _, stderr, thread = Open3.popen3('ruby', '-cw')
end
else
stdin, _, stderr, thread = Open3.popen3('ruby', '-cw')
end
stdin.write(source)
stdin.close
thread.join
stderr.read
end
def process_line(line)
match_data = line.match(/.+:(\d+): (warning: )?(.+)/)
return nil unless match_data
line_number, warning, message = match_data.captures
severity = warning ? :warning : :error
[line_number.to_i, severity, message]
end
end
Version data entries
11 entries across 11 versions & 2 rubygems