Class: String

Inherits:
Object
  • Object
show all
Defined in:
lib/yard/core_ext/string.rb

Direct Known Subclasses

YARD::Docstring

Instance Method Summary (collapse)

Instance Method Details

- (Array) shell_split

Splits text into tokens the way a shell would, handling quoted text as a single token. Use '"' and “'” to escape quotes and '\' to escape a backslash.



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# File 'lib/yard/core_ext/string.rb', line 7

def shell_split
  out = [""]
  state = :none
  escape_next = false
  quote = ""
  strip.split(//).each do |char|
    case state
    when :none, :space
      case char
      when /\s/
        out << "" unless state == :space
        state = :space
        escape_next = false
      when "\\"
        if escape_next
          out.last << char
          escape_next = false
        else
          escape_next = true
        end
      when '"', "'"
        if escape_next
          out.last << char
          escape_next = false
        else
          state = char
          quote = ""
        end
      else
        state = :none
        out.last << char
        escape_next = false
      end
    when '"', "'"
      case char
      when '"', "'"
        if escape_next
          quote << char
          escape_next = false
        elsif char == state
          out.last << quote
          state = :none
        else
          quote << char
        end
      when '\\'
        if escape_next
          quote << char
          escape_next = false
        else
          escape_next = true
        end
      else
        quote << char
        escape_next = false
      end
    end
  end
  out
end