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ashish-d/pre-commit

Created February 24, 2017 18:54
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  1. ashish-d created this gist Feb 24, 2017.
    33 changes: 33 additions & 0 deletions pre-commit
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,33 @@
    #!/usr/bin/env ruby

    require 'rubocop'
    require 'english'

    ADDED_OR_MODIFIED = /A|AM|^M/

    # to prevent code injection: system is a dangerous call
    def raise_single_quote_error
    raise ArgumentError, 'Single quotes are not allowed in filenames here.'
    end

    def extract_file_name(file_name_with_status)
    file_name_array = file_name_with_status.strip.split(' ')
    file_name_array.shift
    fname = file_name_array.join(' ')
    fname[0] = '' if fname[0] == '"'
    fname[fname.length - 1] = '' if fname[fname.length - 1] == '"'
    raise_single_quote_error if fname.include?("'")
    fname
    end

    changed_files =
    `git status --porcelain`
    .split(/\n/)
    .select { |file_name_with_status| file_name_with_status =~ ADDED_OR_MODIFIED }
    .map { |file_name_with_status| extract_file_name file_name_with_status }
    .select { |file_name| File.extname(file_name) =~ /.rb/ }
    .join("' '")

    system("rubocop '#{changed_files}'") unless changed_files.empty?

    exit $CHILD_STATUS.to_s[-1].to_i