Class: R10K::Util::Subprocess

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/r10k/util/subprocess.rb

Overview

The subprocess namespace implements a subset of childprocess. It has three # main differences.

1. child processes invoke setsid()
2. there are no dependencies on C extensions (ffi)
3. it only support unixy systems.

Defined Under Namespace

Classes: IO, Result, Runner, SubprocessError

Constant Summary

Constants included from Logging

Logging::LOG_LEVELS

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logging

formatter, included, level, level=, levels, #logger, #logger_name, outputter, parse_level

Constructor Details

#initialize(argv) ⇒ Subprocess

Returns a new instance of Subprocess.



26
27
28
29
30
 
# File 'lib/r10k/util/subprocess.rb', line 26

def initialize(argv)
  @argv = argv

  @raise_on_fail = false
end

Instance Attribute Details

#cwd ⇒ Object

Returns the value of attribute cwd.



22
23
24
 
# File 'lib/r10k/util/subprocess.rb', line 22

def cwd
  @cwd
end

#logger=(value) ⇒ Object (writeonly)

Sets the attribute logger

Parameters:

  • value —

    the value to set the attribute logger to.



24
25
26
 
# File 'lib/r10k/util/subprocess.rb', line 24

def logger=(value)
  @logger = value
end

#raise_on_fail ⇒ Object

Returns the value of attribute raise_on_fail.



21
22
23
 
# File 'lib/r10k/util/subprocess.rb', line 21

def raise_on_fail
  @raise_on_fail
end

Instance Method Details

#execute ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
 
# File 'lib/r10k/util/subprocess.rb', line 32

def execute
  subprocess = R10K::Util::Subprocess::Runner.new(@argv)
  subprocess.cwd = @cwd

  stdout_r, stdout_w = attach_pipe(subprocess.io, :stdout, :reader)
  stderr_r, stderr_w = attach_pipe(subprocess.io, :stderr, :reader)

  logmsg = "Execute: #{@argv.join(' ')}"
  logmsg << "(cwd: #{@cwd})" if @cwd
  logger.debug1 logmsg

  subprocess.start
  stdout_w.close
  stderr_w.close
  subprocess.wait

  stdout = stdout_r.read
  stderr = stderr_r.read

  result = Result.new(@argv, stdout, stderr, subprocess.exit_code)

  logger.debug2 "[#{result.cmd}] STDOUT: #{result.stdout.chomp}" unless result.stdout.empty?
  logger.debug2 "[#{result.cmd}] STDERR: #{result.stderr.chomp}" unless result.stderr.empty?

  if @raise_on_fail and subprocess.crashed?
    raise SubprocessError.new(:result => result)
  end

  result
end