Method: Mixin::Shell#version

Defined in:
lib/fox/interface/thor/mixin/shell.rb

#version(command) ⇒ String

Returns version string or empty if command not found / error

Parameters:

  • command (String) —

    Command string to probe version for, e.g. ruby

Returns:

  • (String) —

    Returns version string or empty if command not found / error



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# File 'lib/fox/interface/thor/mixin/shell.rb', line 113

def version command

  result      = ""

  begin

    # Sanity
    raise ArgumentError, "Command not found" unless( which( command ) )

    # Get usage help screen for command
    help      = usage( command )

    # Get version flag from help screen
    flag      = version_flag( help )

    return result if( flag.empty? ) # some stupid commands don't follow standard rules, e.g. bundle

    # Get actual version string
    banner    = run( command + " " + flag )

    # Guess way to extract and extract semver
    result    = guess_version( banner.to_s )

  rescue Exception => e
    say "(EE) " + e.message, :red
    result    = ""
  end

  return result
end