Class: Rerun::Glob

Inherits:
Object
  • Object
show all
Defined in:
lib/rerun/glob.rb

Constant Summary collapse

NO_LEADING_DOT =

todo

'(?=[^\.])'
START_OF_FILENAME =

beginning of string or a slash

'(\A|\/)'
END_OF_STRING = 
'\z'

Instance Method Summary collapse

Constructor Details

#initialize(glob_string) ⇒ Glob

Returns a new instance of Glob.



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# File 'lib/rerun/glob.rb', line 11

def initialize glob_string
  @glob_string = glob_string
end

Instance Method Details

#smoosh(chars) ⇒ Object 



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# File 'lib/rerun/glob.rb', line 70

def smoosh chars
  out = []
  until chars.empty?
    char = chars.shift
    if char == "*" and chars.first == "*"
      chars.shift
      chars.shift if chars.first == "/"
      out.push("**")
    else
      out.push(char)
    end
  end
  out
end

#to_regexp ⇒ Object 



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# File 'lib/rerun/glob.rb', line 66

def to_regexp
  Regexp.new(to_regexp_string)
end

#to_regexp_string ⇒ Object 



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# File 'lib/rerun/glob.rb', line 15

def to_regexp_string
  chars = @glob_string.split('')

  chars = smoosh(chars)

  curlies = 0
  escaping = false
  string = chars.map do |char|
    if escaping
      escaping = false
      char
    else
      case char
        when '**'
          "([^/]+/)*"
        when '*'
          ".*"
        when "?"
          "."
        when "."
          "\\."

        when "{"
          curlies += 1
          "("
        when "}"
          if curlies > 0
            curlies -= 1
            ")"
          else
            char
          end
        when ","
          if curlies > 0
            "|"
          else
            char
          end
        when "\\"
          escaping = true
          "\\"

        else
          char

      end
    end
  end.join
  START_OF_FILENAME + string + END_OF_STRING
end