Class: FastlaneCore::CommandExecutor

Inherits:
Object
  • Object
show all
Defined in:
lib/fastlane_core/command_executor.rb

Overview

Executes commands and takes care of error handling and more

Class Method Summary collapse

Class Method Details

.execute(command: nil, print_all: false, print_command: true, error: nil, prefix: nil, loading: nil) ⇒ String

Returns All the output as string.

Parameters:

  • command (String) (defaults to: nil) —

    The command to be executed

  • print_all (Boolean) (defaults to: false) —

    Do we want to print out the command output while running?

  • print_command (Boolean) (defaults to: true) —

    Should we print the command that’s being executed

  • error (Block) (defaults to: nil) —

    A block that’s called if an error occurs

  • prefix (Array) (defaults to: nil) —

    An array containg a prefix + block which might get applied to the output

  • loading (String) (defaults to: nil) —

    A loading string that is shown before the first output

Returns:

  • (String) —

    All the output as string



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# File 'lib/fastlane_core/command_executor.rb', line 33

def execute(command: nil, print_all: false, print_command: true, error: nil, prefix: nil, loading: nil)
  print_all = true if $verbose
  prefix ||= {}

  output = []
  command = command.join(" ") if command.kind_of?(Array)
  UI.command(command) if print_command

  if print_all and loading # this is only used to show the "Loading text"...
    UI.command_output(loading)
  end

  begin
    PTY.spawn(command) do |stdin, stdout, pid|
      begin
        stdin.each do |l|
          line = l.strip # strip so that \n gets removed
          output << line

          next unless print_all

          # Prefix the current line with a string
          prefix.each do |element|
            line = element[:prefix] + line if element[:block] && element[:block].call(line)
          end

          UI.command_output(line)
        end
      rescue Errno::EIO
        # This is expected on some linux systems, that indicates that the subcommand finished
        # and we kept trying to read, ignore it
      ensure
        Process.wait(pid)
      end
    end
  rescue => ex
    # This could happen when the environment is wrong:
    # > invalid byte sequence in US-ASCII (ArgumentError)
    output << ex.to_s
    o = output.join("\n")
    puts o
    if error
      error.call(o, nil)
    else
      raise ex
    end
  end

  # Exit status for build command, should be 0 if build succeeded
  status = $?.exitstatus
  if status != 0
    o = output.join("\n")
    puts o # the user has the right to see the raw output
    UI.error "Exit status: #{status}"
    if error
      error.call(o, status)
    else
      UI.user_error!("Exit status: #{status}")
    end
  end

  return output.join("\n")
end

.which(cmd) ⇒ Object

Cross-platform way of finding an executable in the $PATH. Respects the $PATHEXT, which lists valid file extensions for executables on Windows.

which('ruby') #=> /usr/bin/ruby

Derived from stackoverflow.com/a/5471032/3005



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# File 'lib/fastlane_core/command_executor.rb', line 11

def which(cmd)
  # PATHEXT contains the list of file extensions that Windows considers executable, semicolon separated.
  # e.g. ".COM;.EXE;.BAT;.CMD"
  exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']

  ENV['PATH'].split(File::PATH_SEPARATOR).each do |path|
    exts.each do |ext|
      cmd_path = File.join(path, "#{cmd}#{ext}")
      return cmd_path if File.executable?(cmd_path) && !File.directory?(cmd_path)
    end
  end

  return nil
end