Integrate vagrant-triggers plugin functionality into core Vagrant

lib/vagrant/errors.rb

@@ -776,6 +776,18 @@ class SyncedFolderUnusable < VagrantError
       error_key(:synced_folder_unusable)
     end
 
+    class TriggersGuestNotRunning < VagrantError
+      error_key(:triggers_guest_not_running)
+    end
+
+    class TriggersNoBlockGiven < VagrantError
+      error_key(:triggers_no_block_given)
+    end
+
+    class TriggersNoStageGiven < VagrantError
+      error_key(:triggers_no_stage_given)
+    end
+
     class UIExpectsTTY < VagrantError
       error_key(:ui_expects_tty)
     end

lib/vagrant/machine.rb

@@ -149,6 +149,8 @@ def initialize(name, provider_name, provider_cls, provider_config, provider_opti
       # Output a bunch of information about this machine in
       # machine-readable format in case someone is listening.
       @ui.machine("metadata", "provider", provider_name)
+
+      @triggers = Vagrant::Plugin::V2::Trigger.new(@env, @config.trigger, self)
     end
 
     # This calls an action on the provider. The provider may or may not
@@ -159,6 +161,7 @@ def initialize(name, provider_name, provider_cls, provider_config, provider_opti
     #   as extra data set on the environment hash for the middleware
     #   runner.
     def action(name, opts=nil)
+      @triggers.fire_triggers(name, :before, @name.to_s)
       @logger.info("Calling action: #{name} on provider #{@provider}")
 
       opts ||= {}
@@ -185,7 +188,7 @@ def action(name, opts=nil)
       locker = @env.method(:lock) if lock && !name.to_s.start_with?("ssh")
 
       # Lock this machine for the duration of this action
-      locker.call("machine-action-#{id}") do
+      return_env = locker.call("machine-action-#{id}") do
         # Get the callable from the provider.
         callable = @provider.action(name)
 
@@ -203,6 +206,10 @@ def action(name, opts=nil)
         ui.machine("action", name.to_s, "end")
         action_result
       end
+
+      @triggers.fire_triggers(name, :after, @name.to_s)
+      # preserve returning environment after machine action runs
+      return return_env
     rescue Errors::EnvironmentLockedError
       raise Errors::MachineActionLockedError,
         action: name,

lib/vagrant/plugin/v2.rb

@@ -19,6 +19,7 @@ module V2
       autoload :Push, "vagrant/plugin/v2/push"
       autoload :Provisioner, "vagrant/plugin/v2/provisioner"
       autoload :SyncedFolder, "vagrant/plugin/v2/synced_folder"
+      autoload :Trigger, "vagrant/plugin/v2/trigger"
     end
   end
 end

lib/vagrant/plugin/v2/command.rb

@@ -45,7 +45,7 @@ def execute
         def parse_options(opts=nil)
           # make sure optparse doesn't use POSIXLY_CORRECT parsing
           ENV["POSIXLY_CORRECT"] = nil
-          
+
           # Creating a shallow copy of the arguments so the OptionParser
           # doesn't destroy the originals.
           argv = @argv.dup

lib/vagrant/plugin/v2/trigger.rb

@@ -0,0 +1,242 @@
+require 'fileutils'
+require 'log4r'
+require 'shellwords'
+
+require Vagrant.source_root.join("plugins/provisioners/shell/provisioner")
+require "vagrant/util/subprocess"
+require "vagrant/util/platform"
+require "vagrant/util/powershell"
+
+module Vagrant
+  module Plugin
+    module V2
+      class Trigger
+        # @return [Kernel_V2::Config::Trigger]
+        attr_reader :config
+
+        # This class is responsible for setting up basic triggers that were
+        # defined inside a Vagrantfile.
+        #
+        # @param [Object] env Vagrant environment
+        # @param [Object] config Trigger configuration
+        # @param [Object] machine Active Machine
+        def initialize(env, config, machine)
+          @env        = env
+          @config     = config
+          @machine    = machine
+
+          @logger = Log4r::Logger.new("vagrant::trigger::#{self.class.to_s.downcase}")
+        end
+
+        # Fires all triggers, if any are defined for the action and guest
+        #
+        # @param [Symbol] action Vagrant command to fire trigger on
+        # @param [Symbol] stage :before or :after
+        # @param [String] guest_name The guest that invoked firing the triggers
+        def fire_triggers(action, stage, guest_name)
+          # get all triggers matching action
+          triggers = []
+          if stage == :before
+            triggers = config.before_triggers.select do |t|
+              t.command == action || (t.command == :all && !t.ignore.include?(action))
+            end
+          elsif stage == :after
+            triggers = config.after_triggers.select do |t|
+              t.command == action || (t.command == :all && !t.ignore.include?(action))
+            end
+          else
+            raise Errors::TriggersNoStageGiven,
+              action: action,
+              stage: stage,
+              guest_name: guest_name
+          end
+
+          triggers = filter_triggers(triggers, guest_name)
+
+          if !triggers.empty?
+            @logger.info("Firing trigger for action #{action} on guest #{guest_name}")
+            @machine.ui.info(I18n.t("vagrant.trigger.start", stage: stage, action: action))
+            fire(triggers, guest_name)
+          end
+        end
+
+        protected
+
+        #-------------------------------------------------------------------
+        # Internal methods, don't call these.
+        #-------------------------------------------------------------------
+
+        # Filters triggers to be fired based on configured restraints
+        #
+        # @param [Array] triggers An array of triggers to be filtered
+        # @param [String] guest_name The name of the current guest
+        # @return [Array] The filtered array of triggers
+        def filter_triggers(triggers, guest_name)
+          # look for only_on trigger constraint and if it doesn't match guest
+          # name, throw it away also be sure to preserve order
+          filter = triggers.dup
+
+          filter.each do |trigger|
+            index = nil
+            match = false
+            if trigger.only_on
+              trigger.only_on.each do |o|
+                if o.match(guest_name)
+                  # trigger matches on current guest, so we're fine to use it
+                  match = true
+                  break
+                end
+              end
+              # no matches found, so don't use trigger for guest
+              index = triggers.index(trigger) unless match == true
+            end
+
+            if !index.nil?
+              @logger.debug("Trigger #{trigger.id} will be ignored for #{guest_name}")
+              triggers.delete_at(index)
+            end
+          end
+
+          return triggers
+        end
+
+        # Fires off all triggers in the given array
+        #
+        # @param [Array] triggers An array of triggers to be fired
+        def fire(triggers, guest_name)
+          # ensure on_error is respected by exiting or continuing
+
+          triggers.each do |trigger|
+            @logger.debug("Running trigger #{trigger.id}...")
+
+            if !trigger.name.nil?
+              @machine.ui.info(I18n.t("vagrant.trigger.fire_with_name",
+                                      name: trigger.name))
+            else
+              @machine.ui.info(I18n.t("vagrant.trigger.fire"))
+            end
+
+            if trigger.info
+              info(trigger.info)
+            end
+
+            if trigger.warn
+              warn(trigger.warn)
+            end
+
+            if trigger.run
+              run(trigger.run, trigger.on_error)
+            end
+
+            if trigger.run_remote
+              run_remote(trigger.run_remote, trigger.on_error)
+            end
+          end
+        end
+
+        # Prints the given message at info level for a trigger
+        #
+        # @param [String] message The string to be printed
+        def info(message)
+          @machine.ui.info(message)
+        end
+
+        # Prints the given message at warn level for a trigger
+        #
+        # @param [String] message The string to be printed
+        def warn(message)
+          @machine.ui.warn(message)
+        end
+
+        # Runs a script on a guest
+        #
+        # @param [Provisioners::Shell::Config] config A Shell provisioner config
+        def run(config, on_error)
+          if config.inline
+            cmd = Shellwords.split(config.inline)
+
+            @machine.ui.detail(I18n.t("vagrant.trigger.run.inline", command: config.inline))
+          else
+            cmd = File.expand_path(config.path, @env.root_path)
+            cmd << " #{config.args.join(' ' )}" if config.args
+            cmd = Shellwords.split(cmd)
+
+            @machine.ui.detail(I18n.t("vagrant.trigger.run.script", path: config.path))
+          end
+
+          # Pick an execution method to run the script or inline string with
+          # Default to Subprocess::Execute
+          exec_method = Vagrant::Util::Subprocess.method(:execute)
+
+          if Vagrant::Util::Platform.windows?
+            if config.inline
+              exec_method = Vagrant::Util::PowerShell.method(:execute_inline)
+            else
+              exec_method = Vagrant::Util::PowerShell.method(:execute)
+            end
+          end
+
+          begin
+            result = exec_method.call(*cmd, :notify => [:stdout, :stderr]) do |type,data|
+              options = {}
+              case type
+              when :stdout
+                options[:color] = :green if !config.keep_color
+              when :stderr
+                options[:color] = :red if !config.keep_color
+              end
+
+              @machine.ui.detail(data, options)
+            end
+          rescue => e
+            @machine.ui.error(I18n.t("vagrant.errors.triggers_run_fail"))
+            @machine.ui.error(e.message)
+
+            if on_error == :halt
+              @logger.debug("Trigger run encountered an error. Halting on error...")
+              raise e
+            else
+              @logger.debug("Trigger run encountered an error. Continuing on anyway...")
+              @machine.ui.warn(I18n.t("vagrant.trigger.on_error_continue"))
+            end
+          end
+        end
+
+        # Runs a script on the guest
+        #
+        # @param [ShellProvisioner/Config] config A Shell provisioner config
+        def run_remote(config, on_error)
+          unless @machine.state.id == :running
+            if on_error == :halt
+              raise Errors::TriggersGuestNotRunning,
+                machine_name: @machine.name,
+                state: @machine.state.id
+            else
+              @machine.ui.error(I18n.t("vagrant.errors.triggers_guest_not_running",
+                                        machine_name: @machine.name,
+                                        state: @machine.state.id))
+              @machine.ui.warn(I18n.t("vagrant.trigger.on_error_continue"))
+              return
+            end
+          end
+
+          prov = VagrantPlugins::Shell::Provisioner.new(@machine, config)
+
+          begin
+            prov.provision
+          rescue => e
+            @machine.ui.error(I18n.t("vagrant.errors.triggers_run_fail"))
+
+            if on_error == :halt
+              @logger.debug("Trigger run encountered an error. Halting on error...")
+              raise e
+            else
+              @logger.debug("Trigger run encountered an error. Continuing on anyway...")
+              @machine.ui.error(e.message)
+            end
+          end
+        end
+      end
+    end
+  end
+end

lib/vagrant/util/powershell.rb

@@ -87,6 +87,27 @@ def self.execute_cmd(command)
         return r.stdout.chomp
       end
 
+      # Execute a powershell command and return a result
+      #
+      # @param [String] command PowerShell command to execute.
+      # @param [Hash] opts A collection of options for subprocess::execute
+      # @param [Block] block Ruby block
+      def self.execute_inline(*command, **opts, &block)
+        validate_install!
+        c = [
+          executable,
+          "-NoLogo",
+          "-NoProfile",
+          "-NonInteractive",
+          "-ExecutionPolicy", "Bypass",
+          "-Command",
+          command
+        ].flatten.compact
+        c << opts
+
+        Subprocess.execute(*c, &block)
+      end
+
       # Returns the version of PowerShell that is installed.
       #
       # @return [String]