commands/docker-logs: parallelize for multiple containers

plugins/providers/docker/command/logs.rb

@@ -30,58 +30,66 @@ module VagrantPlugins
           argv = parse_options(opts)
           return if !argv
 
-          output_options = {}
-          output_options[:prefix] = false if !options[:prefix]
-
           # TODO: exit with exit status != 0 if all machines are unknown
           # or not created.
 
           # Go through each machine and execute the client on it
-          with_target_vms(argv) do |machine|
-            if machine.provider_name != :docker
-              machine.ui.output(I18n.t("docker_provider.not_docker_provder"))
-              next
-            end
+          @env.batch do |batch|
+            with_target_vms(argv) do |machine|
+              if machine.provider_name != :docker
+                machine.ui.output(I18n.t("docker_provider.not_docker_provder"))
+                next
+              end
 
-            state = machine.state
-            if state == :host_state_unknown
-              machine.ui.output(I18n.t("docker_provider.logs_host_state_unknown"))
-              next
-            elsif state == :not_created
-              machine.ui.output(I18n.t("docker_provider.not_created_skip"))
-              next
-            end
+              state = machine.state
+              if state == :host_state_unknown
+                machine.ui.output(I18n.t("docker_provider.logs_host_state_unknown"))
+                next
+              elsif state == :not_created
+                machine.ui.output(I18n.t("docker_provider.not_created_skip"))
+                next
+              end
 
-            command = ["docker", "logs"]
-            command << "--follow" if options[:follow]
-            command << machine.id
-
-            data_acc = ""
-            machine.provider.driver.execute(*command) do |type, data|
-              # Accumulate the data so we only output lines at a time
-              data_acc << data
-
-              # If we have a newline, then output all the lines we have so far
-              if data_acc.include?("\n")
-                lines    = data_acc.split("\n")
-
-                if !data_acc.end_with?("\n")
-                  data_acc = lines.pop.chomp
-                else
-                  data_acc = ""
-                end
-
-                lines.each do |line|
-                  line = " " if line == ""
-                  machine.ui.output(line, **output_options)
-                end
+              batch.custom(machine) do |m|
+                execute_single(m, options)
               end
             end
-
-            # Output any remaining data
-            machine.ui.output(data_acc, **output_options) if !data_acc.empty?
           end
         end
+
+        def execute_single(machine, options)
+          command = ["docker", "logs"]
+          command << "--follow" if options[:follow]
+          command << machine.id
+
+          output_options = {}
+          output_options[:prefix] = false if !options[:prefix]
+
+          data_acc = ""
+          machine.provider.driver.execute(*command) do |type, data|
+            # Accumulate the data so we only output lines at a time
+            data_acc << data
+
+            # If we have a newline, then output all the lines we have so far
+            if data_acc.include?("\n")
+              lines    = data_acc.split("\n")
+
+              if !data_acc.end_with?("\n")
+                data_acc = lines.pop.chomp
+              else
+                data_acc = ""
+              end
+
+              lines.each do |line|
+                line = " " if line == ""
+                machine.ui.output(line, **output_options)
+              end
+            end
+          end
+
+          # Output any remaining data
+          machine.ui.output(data_acc, **output_options) if !data_acc.empty?
+        end
       end
     end
   end