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docker_compose_lxc.rb
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docker_compose_lxc.rb
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# encoding: UTF-8
#
# Author:: Xabier de Zuazo (<xabier@zuazo.org>)
# Copyright:: Copyright (c) 2016 Xabier de Zuazo
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require 'specinfra/backend/docker_compose'
require 'specinfra/backend/docker_lxc/exceptions'
require 'specinfra/backend/docker_lxc/shell_helpers'
# Command Execution Framework for Serverspec, Itamae and so on.
module Specinfra
# Specinfra backend types.
module Backend
# Specinfra and Serverspec backend for Docker Compose using LXC execution
# driver.
class DockerComposeLxc < DockerCompose
include Specinfra::Backend::DockerLxc::ShellHelpers
protected
# Generates `lxc-attach` command to run.
#
# @param cmd [String] The commands to run inside docker.
# @return [Array] The command to run as unescaped array.
def lxc_attach_command(cmd)
id = container.id
['lxc-attach', '-n', id, '--', 'sh', '-c', cmd]
end
# Parses `lxc-attach` command output and raises an exception if it is an
# error from the `lxc-attach` program.
#
# @param stderr [String] Command *stderr* output.
# @param exit_status [Fixnum] Command exit status.
# @return nil
def lxc_attach_result_assert(stderr, exit_status)
return if exit_status == 0
return if stderr.match(/\A(lxc-attach|lxc_container|sudo): /).nil?
fail DockerLxc::LxcAttachError, stderr
end
# Runs a command inside a Docker Compose container.
#
# @param cmd [String] The command to run.
# @param opts [Hash] Options to pass to {Open3.popen3}.
# @return [Specinfra::CommandResult] The result.
# @api public
def docker_compose_run!(cmd, opts = {})
stdout, stderr, status = shell_command!(lxc_attach_command(cmd), opts)
lxc_attach_result_assert(stderr, status)
rspec_example_metadata(cmd, stdout, stderr)
CommandResult.new(stdout: stdout, stderr: stderr, exit_status: status)
rescue DockerLxc::LxcAttachError
raise
rescue => e
finalize
erroneous_result(cmd, e)
end
end
end
end