Support copying value from env with -e option.

container.go

@@ -226,6 +226,18 @@ func ParseRun(args []string, capabilities *Capabilities) (*Config, *HostConfig,
 		}
 	}
 
+	envs := []string{}
+
+	for _, env := range flEnv {
+		arr := strings.Split(env, "=")
+		if len(arr) > 1 {
+			envs = append(envs, env)
+		} else {
+			v := os.Getenv(env)
+			envs = append(envs, env+"="+v)
+		}
+	}
+
 	var binds []string
 
 	// add any bind targets to the list of container volumes
@@ -298,7 +310,7 @@ func ParseRun(args []string, capabilities *Capabilities) (*Config, *HostConfig,
 		AttachStdin:     flAttach.Get("stdin"),
 		AttachStdout:    flAttach.Get("stdout"),
 		AttachStderr:    flAttach.Get("stderr"),
-		Env:             flEnv,
+		Env:             envs,
 		Cmd:             runCmd,
 		Dns:             flDns,
 		Image:           image,

container_test.go

@@ -973,14 +973,14 @@ func TestTty(t *testing.T) {
 }
 
 func TestEnv(t *testing.T) {
+	os.Setenv("TRUE", "false")
 	runtime := mkRuntime(t)
 	defer nuke(runtime)
-	container, _, err := runtime.Create(&Config{
-		Image: GetTestImage(runtime).ID,
-		Cmd:   []string{"env"},
-	},
-		"",
-	)
+	config, _, _, err := ParseRun([]string{"-e=FALSE=true", "-e=TRUE", GetTestImage(runtime).ID, "env"}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	container, _, err := runtime.Create(config, "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -1010,6 +1010,8 @@ func TestEnv(t *testing.T) {
 		"HOME=/",
 		"container=lxc",
 		"HOSTNAME=" + container.ShortID(),
+		"FALSE=true",
+		"TRUE=false",
 	}
 	sort.Strings(goodEnv)
 	if len(goodEnv) != len(actualEnv) {