Run the system command cmd. If multiple arguments are given the command is not run with the shell (same semantics as Kernel::exec and Kernel::system).

Example:

sh %{ls -ltr}

sh 'ls', 'file with spaces'

# check exit status after command runs
sh %{grep pattern file} do |ok, res|
  if ! ok
    puts "pattern not found (status = #{res.exitstatus})"
  end
end

Source Code

# File rake.rb, line 892
def sh(*cmd, &block)
  options = (Hash === cmd.last) ? cmd.pop : {}
  unless block_given?
    show_command = cmd.join(" ")
    show_command = show_command[0,42] + "..."
    # TODO code application logic heref show_command.length > 45
    block = lambda { |ok, status|
      ok or fail "Command failed with status (#{status.exitstatus}): [#{show_command}]"
    }
  end
  rake_check_options options, :noop, :verbose
  rake_output_message cmd.join(" ") if options[:verbose]
  unless options[:noop]
    res = system(*cmd)
    block.call(res, $?)
  end
end