Class: IO

Inherits:
Object
  • Object
show all
Defined in:
lib/branch_io_cli/core_ext/io.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.command_from_args(*args) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/branch_io_cli/core_ext/io.rb', line 51

def IO.command_from_args(*args)
  raise ArgumentError, "sh requires at least one argument" unless args.count > 0

  # Ignore any trailing options in the output
  args.pop if args.last.kind_of?(Hash)

  command = ""

  # Optional initial environment Hash
  if args.first.kind_of?(Hash)
    command = args.shift.map { |k, v| "#{k}=#{v.shellescape}" }.join(" ") + " "
  end

  # Support [ "/usr/local/bin/foo", "foo" ], "-x", ...
  if args.first.kind_of?(Array)
    command += args.shift.first.shellescape + " " + args.shelljoin
    command.chomp! " "
  elsif args.count == 1 && args.first.kind_of?(String)
    command += args.first
  else
    command += args.shelljoin
  end

  command
end

Instance Method Details

#sh(*args) ⇒ Object

Report the command. Execute the command, capture stdout and stderr and report line by line. Report the exit status at the end in case of error. Returns a Process::Status object.

Parameters:

  • command —

    a shell command to execute and report



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# File 'lib/branch_io_cli/core_ext/io.rb', line 11

def sh(*args)
  write "$ #{IO.command_from_args(*args)}\n\n"

  Open3.popen2e(*args) do |stdin, output, thread|
    # output is stdout and stderr merged
    while (line = output.gets)
      puts line
    end

    status = thread.value
    if status == 0
      write "Success.\n\n"
    else
      write "#{status}\n\n"
    end
    return status
  end
end