Module: Mixin::Shell

Includes:
Guess
Included in:
Info
Defined in:
lib/fox/interface/thor/mixin/shell.rb

Instance Method Summary collapse

Methods included from Guess

#guess_version

Instance Method Details

#execute(command) ⇒ String

Returns result of command

Parameters:

  • command (String) —

    Shell command string with arguments

Returns:

  • (String) —

    Returns result of command

Raises:

  • (ArgumentError) 


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# File 'lib/fox/interface/thor/mixin/shell.rb', line 70

def execute command

  exists  = which( command )
  raise ArgumentError, "Command not found" unless( exists )
  result  = `#{command}`

  return result
end

#initialize(*args) ⇒ Object

Parameters:

  • args (Array) —

    Argument array



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# File 'lib/fox/interface/thor/mixin/shell.rb', line 27

def initialize *args
  super
end

#run(command, regexp = nil) ⇒ String

Returns empty string if command not found or other problem, otherwise result of command.

Parameters:

  • command (String) —

    The command to run

  • regexp (RegExp) (defaults to: nil) —

    Optional regular expression used for matching output

Returns:

  • (String) —

    Returns empty string if command not found or other problem, otherwise result of command.



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# File 'lib/fox/interface/thor/mixin/shell.rb', line 41

def run command, regexp = nil

  result      = ''

  begin
    if( regexp.nil? )
      result  = execute( command ).strip
    else
      raise ArgumentError, 'Regular Expression input needs to be of type Regexp' unless( regexp.is_a?( Regexp ) )

      result  = execute( command ).andand.send( :match, regexp ).andand.send( :to_s ).strip
    end

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

  return result
end

#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

#which(command) ⇒ Boolean Also known as: exists?

Returns boolean true if command is available, false if not

Parameters:

  • command (String) —

    Shell command string with or without arguments. If arguments are given, they are split on first whitespace and discarded

Returns:

  • (Boolean) —

    Returns boolean true if command is available, false if not



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# File 'lib/fox/interface/thor/mixin/shell.rb', line 90

def which command
  result      = false

  begin
    partial   = command.to_s
    partial   = partial.split(' ').first.to_s if( partial =~ %r{ }i )
    path      = File.which( partial )

    result    = true unless( path.nil? )
  rescue Exception => e
    say "(EE) " + e.message, :red
    result    = false
  end

  return result
end