Merge pull request #750 from h0tw1r3/lxd-backend

add lxd backend

Author: mizzy

lib/specinfra/backend.rb

@@ -6,6 +6,7 @@
 require 'specinfra/backend/cmd'
 require 'specinfra/backend/docker'
 require 'specinfra/backend/lxc'
+require 'specinfra/backend/lxd'
 require 'specinfra/backend/winrm'
 require 'specinfra/backend/shell_script'
 require 'specinfra/backend/dockerfile'

lib/specinfra/backend/lxd.rb

@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+require 'singleton'
+require 'fileutils'
+require 'shellwords'
+require 'sfl' if Specinfra.ruby_is_older_than?(1, 9, 0)
+
+module Specinfra
+  module Backend
+    # LXD transport
+    class Lxd < Exec
+      def initialize(config = {})
+        super
+
+        raise 'Please specify lxd_instance' unless (@instance = get_config(:lxd_instance))
+        raise 'Please specify lxd_remote' unless (@remote = get_config(:lxd_remote))
+
+        @remote_instance = [@remote, @instance].compact.join(':')
+      end
+
+      class << self
+        protected
+
+        def run_command(cmd, opts = {})
+          cmd = build_command(cmd)
+          run_pre_command(opts)
+          stdout, stderr, exit_status = with_env do
+            spawn_command(cmd)
+          end
+
+          if @example
+            @example.metadata[:command] = cmd
+            @example.metadata[:stdout]  = stdout
+          end
+
+          CommandResult.new :stdout => stdout, :stderr => stderr, :exit_status => exit_status
+        end
+
+        def build_command(cmd)
+          cmd = super(cmd)
+          "lxc exec #{@remote_instance} -- #{cmd}"
+        end
+
+        def send_file(source, destination)
+          flags = %w[--create-dirs]
+          if File.directory?(source)
+            flags << '--recursive'
+            destination = Pathname.new(destination).dirname.to_s
+          end
+          cmd = %W[lxc file push #{source} #{@remote_instance}#{destination}] + flags
+          spawn_command(cmd.join(' '))
+        end
+
+        private
+
+        def run_pre_command(_opts)
+          return unless get_config(:pre_command)
+
+          cmd = build_command(get_config(:pre_command))
+          spawn_command(cmd)
+        end
+      end
+    end
+  end
+end

lib/specinfra/configuration.rb

@@ -20,6 +20,8 @@ class << self
         :docker_image,
         :docker_url,
         :lxc,
+        :lxd_remote,
+        :lxd_instance,
         :request_pty,
         :ssh_options,
         :ssh_without_env,