From 6a6596913a1c28a465dcc49f0ee9f367b6a85935 Mon Sep 17 00:00:00 2001
From: Solomon Hykes <solomon@docker.com>
Date: Thu, 1 May 2014 23:31:06 -0700
Subject: [PATCH] First skeleton of a simulator

---
 backends/backends.go  |  1 +
 backends/simulator.go | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 backends/simulator.go

diff --git a/backends/backends.go b/backends/backends.go
index 04c66f3477..10047d1b17 100644
--- a/backends/backends.go
+++ b/backends/backends.go
@@ -15,5 +15,6 @@ func New() *engine.Engine {
 	back.Logging = false
 	// Register all backends here
 	Debug().Install(back)
+	Simulator().Install(back)
 	return back
 }
diff --git a/backends/simulator.go b/backends/simulator.go
new file mode 100644
index 0000000000..99a4b72620
--- /dev/null
+++ b/backends/simulator.go
@@ -0,0 +1,32 @@
+package backends
+
+import (
+	"github.com/dotcloud/docker/engine"
+)
+
+func Simulator() engine.Installer {
+	return &simulator{}
+}
+
+type simulator struct {
+	containers []string
+}
+
+func (s *simulator) Install(eng *engine.Engine) error {
+	eng.Register("simulator", func(job *engine.Job) engine.Status {
+		s.containers = job.Args
+		job.Eng.Register("containers", func(job *engine.Job) engine.Status {
+			t := engine.NewTable("Id", len(s.containers))
+			for _, c := range s.containers {
+				e := &engine.Env{}
+				e.Set("Id", c)
+				e.Set("Image", "foobar")
+				t.Add(e)
+			}
+			t.WriteListTo(job.Stdout)
+			return engine.StatusOK
+		})
+		return engine.StatusOK
+	})
+	return nil
+}