64 lines
2 KiB
Ruby
64 lines
2 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'fileutils'
|
|
require 'open3'
|
|
|
|
module Gitlab
|
|
module Popen
|
|
extend self
|
|
|
|
Result = Struct.new(:cmd, :stdout, :stderr, :status, :duration)
|
|
|
|
# Returns [stdout + stderr, status]
|
|
# status is either the exit code or the signal that killed the process
|
|
def popen(cmd, path = nil, vars = {}, &block)
|
|
result = popen_with_detail(cmd, path, vars, &block)
|
|
|
|
# Process#waitpid returns Process::Status, which holds a 16-bit value.
|
|
# The higher-order 8 bits hold the exit() code (`exitstatus`).
|
|
# The lower-order bits holds whether the process was terminated.
|
|
# If the process didn't exit normally, `exitstatus` will be `nil`,
|
|
# but we still want a non-zero code, even if the value is
|
|
# platform-dependent.
|
|
status = result.status&.exitstatus || result.status.to_i
|
|
|
|
["#{result.stdout}#{result.stderr}", status]
|
|
end
|
|
|
|
# Returns Result
|
|
def popen_with_detail(cmd, path = nil, vars = {})
|
|
unless cmd.is_a?(Array)
|
|
raise "System commands must be given as an array of strings"
|
|
end
|
|
|
|
path ||= Dir.pwd
|
|
vars['PWD'] = path
|
|
options = { chdir: path }
|
|
|
|
unless File.directory?(path)
|
|
FileUtils.mkdir_p(path)
|
|
end
|
|
|
|
cmd_stdout = ''
|
|
cmd_stderr = ''
|
|
cmd_status = nil
|
|
start = Time.now
|
|
|
|
Open3.popen3(vars, *cmd, options) do |stdin, stdout, stderr, wait_thr|
|
|
# stderr and stdout pipes can block if stderr/stdout aren't drained: https://bugs.ruby-lang.org/issues/9082
|
|
# Mimic what Ruby does with capture3: https://github.com/ruby/ruby/blob/1ec544695fa02d714180ef9c34e755027b6a2103/lib/open3.rb#L257-L273
|
|
out_reader = Thread.new { stdout.read }
|
|
err_reader = Thread.new { stderr.read }
|
|
|
|
yield(stdin) if block_given?
|
|
stdin.close
|
|
|
|
cmd_stdout = out_reader.value
|
|
cmd_stderr = err_reader.value
|
|
cmd_status = wait_thr.value
|
|
end
|
|
|
|
Result.new(cmd, cmd_stdout, cmd_stderr, cmd_status, Time.now - start)
|
|
end
|
|
end
|
|
end
|