diff --git a/base/cli/stream.go b/base/cli/stream.go
new file mode 100644
index 00000000..7f1e458c
--- /dev/null
+++ b/base/cli/stream.go
@@ -0,0 +1 @@
+package cli
diff --git a/base/cli/system.go b/base/cli/system.go
index 500a9a79..471ead8e 100644
--- a/base/cli/system.go
+++ b/base/cli/system.go
@@ -16,24 +16,14 @@ import (
 func _system_show(m *ice.Message, cmd *exec.Cmd) {
 	if r, ok := m.Optionv(CMD_INPUT).(io.Reader); ok {
 		cmd.Stdin = r
-	} else if r, ok := m.Optionv("input").(io.Reader); ok {
-		cmd.Stdin = r
 	}
 
-	if w, ok := m.Optionv(CMD_ERRPUT).(io.WriteCloser); ok {
-		cmd.Stderr = w
-	}
 	if w, ok := m.Optionv(CMD_OUTPUT).(io.WriteCloser); ok {
 		cmd.Stdout = w
-
-		if e := cmd.Run(); e != nil {
-			m.Warn(e != nil, ErrRun, strings.Join(cmd.Args, " "), "\n", e.Error())
-		} else {
-			m.Cost("args", cmd.Args, "code", cmd.ProcessState.ExitCode())
-		}
-	} else if w, ok := m.Optionv("output").(io.WriteCloser); ok {
 		cmd.Stderr = w
-		cmd.Stdout = w
+		if w, ok := m.Optionv(CMD_ERRPUT).(io.WriteCloser); ok {
+			cmd.Stderr = w
+		}
 
 		if e := cmd.Run(); e != nil {
 			m.Warn(e != nil, ErrRun, strings.Join(cmd.Args, " "), "\n", e.Error())
@@ -41,16 +31,17 @@ func _system_show(m *ice.Message, cmd *exec.Cmd) {
 			m.Cost("args", cmd.Args, "code", cmd.ProcessState.ExitCode())
 		}
 	} else {
-		err := bytes.NewBuffer(make([]byte, 0, 1024))
 		out := bytes.NewBuffer(make([]byte, 0, 1024))
-		cmd.Stderr = err
-		cmd.Stdout = out
+		err := bytes.NewBuffer(make([]byte, 0, 1024))
 		defer func() {
 			m.Push(CMD_ERR, err.String())
 			m.Push(CMD_OUT, out.String())
 			m.Echo(kit.Select(err.String(), out.String()))
 		}()
 
+		cmd.Stdout = out
+		cmd.Stderr = err
+
 		if e := cmd.Run(); e != nil {
 			m.Warn(e != nil, ErrRun, strings.Join(cmd.Args, " "), "\n", kit.Select(e.Error(), err.String()))
 		} else {
@@ -85,6 +76,9 @@ const (
 	LINUX   = "linux"
 	DARWIN  = "darwin"
 	WINDOWS = "windows"
+	SOURCE  = "source"
+	HOME    = "home"
+	PATH    = "path"
 )
 const SYSTEM = "system"
 
diff --git a/base/web/stream.go b/base/web/stream.go
new file mode 100644
index 00000000..ea380d06
--- /dev/null
+++ b/base/web/stream.go
@@ -0,0 +1,21 @@
+package web
+
+import (
+	ice "github.com/shylinux/icebergs"
+	"github.com/shylinux/icebergs/base/cli"
+)
+
+type Buffer struct {
+	m *ice.Message
+	n string
+}
+
+func (b *Buffer) Write(buf []byte) (int, error) {
+	b.m.Cmd(SPACE, b.n, "grow", string(buf))
+	return len(buf), nil
+}
+func (b *Buffer) Close() error { return nil }
+
+func PushStream(m *ice.Message) {
+	m.Option(cli.CMD_OUTPUT, &Buffer{m: m, n: m.Option(ice.MSG_DAEMON)})
+}
diff --git a/core/code/install.go b/core/code/install.go
index d1ddbb70..62170174 100644
--- a/core/code/install.go
+++ b/core/code/install.go
@@ -16,17 +16,6 @@ import (
 	kit "github.com/shylinux/toolkits"
 )
 
-type Buffer struct {
-	m *ice.Message
-	n string
-}
-
-func (b *Buffer) Write(buf []byte) (int, error) {
-	b.m.Cmd(web.SPACE, b.n, "grow", string(buf))
-	return len(buf), nil
-}
-func (b *Buffer) Close() error { return nil }
-
 const PREPARE = "prepare"
 const INSTALL = "install"
 
@@ -37,10 +26,10 @@ func init() {
 		},
 		Commands: map[string]*ice.Command{
 			INSTALL: {Name: "install name port path auto download", Help: "安装", Meta: kit.Dict(), Action: map[string]*ice.Action{
-				web.DOWNLOAD: {Name: "download link", Help: "下载", Hand: func(m *ice.Message, arg ...string) {
+				web.DOWNLOAD: {Name: "download link path", Help: "下载", Hand: func(m *ice.Message, arg ...string) {
 					link := m.Option(kit.MDB_LINK)
 					name := path.Base(link)
-					file := path.Join(m.Conf(INSTALL, kit.META_PATH), name)
+					file := path.Join(kit.Select(m.Conf(INSTALL, kit.META_PATH), m.Option(kit.MDB_PATH)), name)
 
 					defer m.Cmdy(nfs.DIR, file)
 					if _, e := os.Stat(file); e == nil {
@@ -80,7 +69,7 @@ func init() {
 					pp := kit.Path(path.Join(p, "_install"))
 
 					// 推流
-					m.Option(cli.CMD_OUTPUT, &Buffer{m: m, n: m.Option(ice.MSG_DAEMON)})
+					web.PushStream(m)
 					defer func() { m.Toast("success", "build") }()
 					defer func() { m.ProcessHold() }()
 
diff --git a/type.go b/type.go
index 613cdb43..0f7c242e 100644
--- a/type.go
+++ b/type.go
@@ -159,6 +159,23 @@ func (c *Context) Merge(s *Context) *Context {
 		c.Commands = map[string]*Command{}
 	}
 	for k, v := range s.Commands {
+		if o, ok := c.Commands[k]; ok && s != c {
+			func() {
+				switch last, next := o.Hand, v.Hand; k {
+				case CTX_INIT:
+					v.Hand = func(m *Message, c *Context, key string, arg ...string) {
+						last(m, c, key, arg...)
+						next(m, c, key, arg...)
+					}
+				case CTX_EXIT:
+					v.Hand = func(m *Message, c *Context, key string, arg ...string) {
+						next(m, c, key, arg...)
+						last(m, c, key, arg...)
+					}
+				}
+			}()
+		}
+
 		c.Commands[k] = v
 
 		if v.List == nil {