convert repo plugin to golang

plugins/common/vendor/github.com/codeskyblue/go-sh/LICENSE

@@ -0,0 +1,202 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+   limitations under the License.
+

plugins/common/vendor/github.com/codeskyblue/go-sh/OLD_README.md

@@ -0,0 +1,69 @@
+## OLD README
+First give you a full example, I will explain every command below.
+
+	session := sh.NewSession()
+	session.Env["PATH"] = "/usr/bin:/bin"
+	session.Stdout = os.Stdout
+	session.Stderr = os.Stderr
+	session.Alias("ll", "ls", "-l")
+	session.ShowCMD = true // enable for debug
+	var err error
+	err = session.Call("ll", "/")
+	if err != nil {
+		log.Fatal(err)
+	}
+	ret, err := session.Capture("pwd", sh.Dir("/home")) # wraper of session.Call
+	if err != nil {
+		log.Fatal(err)
+	}
+	# ret is "/home\n"
+	fmt.Println(ret)
+
+create a new Session
+
+	session := sh.NewSession()
+
+use alias like this
+
+	session.Alias("ll", "ls", "-l") # like alias ll='ls -l'
+
+set current env like this
+
+	session.Env["BUILD_ID"] = "123" # like export BUILD_ID=123
+
+set current directory
+
+	session.Set(sh.Dir("/")) # like cd /
+
+pipe is also supported
+
+	session.Command("echo", "hello\tworld").Command("cut", "-f2")
+	// output should be "world"
+	session.Run()
+
+test, the build in command support
+
+	session.Test("d", "dir") // test dir
+	session.Test("f", "file) // test regular file
+
+with `Alias Env Set Call Capture Command` a shell scripts can be easily converted into golang program. below is a shell script.
+
+	#!/bin/bash -
+	#
+	export PATH=/usr/bin:/bin
+	alias ll='ls -l'
+	cd /usr
+	if test -d "local"
+	then
+		ll local | awk '{print $1, $NF}'
+	fi
+
+convert to golang, will be
+
+	s := sh.NewSession()
+	s.Env["PATH"] = "/usr/bin:/bin"
+	s.Set(sh.Dir("/usr"))
+	s.Alias("ll", "ls", "-l")
+	if s.Test("d", "local") {
+		s.Command("ll", "local").Command("awk", "{print $1, $NF}").Run()
+	}

plugins/common/vendor/github.com/codeskyblue/go-sh/README.md

@@ -0,0 +1,85 @@
+## go-sh
+[![wercker status](https://app.wercker.com/status/009acbd4f00ccc6de7e2554e12a50d84/s "wercker status")](https://app.wercker.com/project/bykey/009acbd4f00ccc6de7e2554e12a50d84)
+[![Go Walker](http://gowalker.org/api/v1/badge)](http://gowalker.org/github.com/codeskyblue/go-sh)
+
+*If you depend on the old api, see tag: v.0.1*
+
+install: `go get github.com/codeskyblue/go-sh`
+
+Pipe Example:
+
+	package main
+
+	import "github.com/codeskyblue/go-sh"
+
+	func main() {
+		sh.Command("echo", "hello\tworld").Command("cut", "-f2").Run()
+	}
+
+Because I like os/exec, `go-sh` is very much modelled after it. However, `go-sh` provides a better experience.
+
+These are some of its features:
+
+* keep the variable environment (e.g. export)
+* alias support (e.g. alias in shell)
+* remember current dir
+* pipe command
+* shell build-in commands echo & test
+* timeout support
+
+Examples are important:
+
+	sh: echo hello
+	go: sh.Command("echo", "hello").Run()
+
+	sh: export BUILD_ID=123
+	go: s = sh.NewSession().SetEnv("BUILD_ID", "123")
+
+	sh: alias ll='ls -l'
+	go: s = sh.NewSession().Alias('ll', 'ls', '-l')
+
+	sh: (cd /; pwd)
+	go: sh.Command("pwd", sh.Dir("/")).Run()
+
+	sh: test -d data || mkdir data
+	go: if ! sh.Test("dir", "data") { sh.Command("mkdir", "data").Run() }
+
+	sh: cat first second | awk '{print $1}'
+	go: sh.Command("cat", "first", "second").Command("awk", "{print $1}").Run()
+
+	sh: count=$(echo "one two three" | wc -w)
+	go: count, err := sh.Echo("one two three").Command("wc", "-w").Output()
+
+	sh(in ubuntu): timeout 1s sleep 3
+	go: c := sh.Command("sleep", "3"); c.Start(); c.WaitTimeout(time.Second) # default SIGKILL
+	go: out, err := sh.Command("sleep", "3").SetTimeout(time.Second).Output() # set session timeout and get output)
+
+	sh: echo hello | cat
+	go: out, err := sh.Command("cat").SetInput("hello").Output()
+
+	sh: cat # read from stdin
+	go: out, err := sh.Command("cat").SetStdin(os.Stdin).Output()
+
+If you need to keep env and dir, it is better to create a session
+
+	session := sh.NewSession()
+	session.SetEnv("BUILD_ID", "123")
+	session.SetDir("/")
+	# then call cmd
+	session.Command("echo", "hello").Run()
+	# set ShowCMD to true for easily debug
+	session.ShowCMD = true
+
+for more information, it better to see docs.
+[![Go Walker](http://gowalker.org/api/v1/badge)](http://gowalker.org/github.com/codeskyblue/go-sh)
+
+### contribute
+If you love this project, starring it will encourage the coder. Pull requests are welcome.
+
+support the author: [alipay](https://me.alipay.com/goskyblue)
+
+### thanks
+this project is based on <http://github.com/codegangsta/inject>. thanks for the author.
+
+# the reason to use Go shell
+Sometimes we need to write shell scripts, but shell scripts are not good at working cross platform,  Go, on the other hand, is good at that. Is there a good way to use Go to write shell like scripts? Using go-sh we can do this now.

plugins/common/vendor/github.com/codeskyblue/go-sh/example/example1.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/codeskyblue/go-sh"
+)
+
+func main() {
+	sh.Command("echo", "hello").Run()
+	out, err := sh.Command("echo", "hello").Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println("output is", string(out))
+
+	var a int
+	sh.Command("echo", "2").UnmarshalJSON(&a)
+	fmt.Println("a =", a)
+
+	s := sh.NewSession()
+	s.Alias("hi", "echo", "hi")
+	s.Command("hi", "boy").Run()
+
+	fmt.Print("pwd = ")
+	s.Command("pwd", sh.Dir("/")).Run()
+
+	if !sh.Test("dir", "data") {
+		sh.Command("echo", "mkdir", "data").Run()
+	}
+
+	sh.Command("echo", "hello", "world").
+		Command("awk", `{print "second arg is "$2}`).Run()
+	s.ShowCMD = true
+	s.Command("echo", "hello", "world").
+		Command("awk", `{print "second arg is "$2}`).Run()
+
+	s.SetEnv("BUILD_ID", "123").Command("bash", "-c", "echo $BUILD_ID").Run()
+	s.Command("bash", "-c", "echo current shell is $SHELL").Run()
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/example/less/less.go

@@ -0,0 +1,7 @@
+package main
+
+import "github.com/codeskyblue/go-sh"
+
+func main() {
+	sh.Command("less", "less.go").Run()
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/example/tail/tailf.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	"github.com/codeskyblue/go-sh"
+)
+
+func main() {
+	flag.Parse()
+	if flag.NArg() != 1 {
+		fmt.Println("Usage: PROGRAM <file>")
+		return
+	}
+	sh.Command("tail", "-f", flag.Arg(0)).Run()
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/example/timeout/timeout.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	sh "github.com/codeskyblue/go-sh"
+)
+
+func main() {
+	c := sh.Command("sleep", "3")
+	c.Start()
+	err := c.WaitTimeout(time.Second * 1)
+	if err != nil {
+		fmt.Printf("timeout should happend: %v\n", err)
+	}
+	// timeout should be a session
+	out, err := sh.Command("sleep", "2").SetTimeout(time.Second).Output()
+	fmt.Printf("output:(%s), err(%v)\n", string(out), err)
+
+	out, err = sh.Command("echo", "hello").SetTimeout(time.Second).Output()
+	fmt.Printf("output:(%s), err(%v)\n", string(out), err)
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/example_test.go

@@ -0,0 +1,28 @@
+package sh_test
+
+import (
+	"fmt"
+
+	"github.com/codeskyblue/go-sh"
+)
+
+func ExampleCommand() {
+	out, err := sh.Command("echo", "hello").Output()
+	fmt.Println(string(out), err)
+}
+
+func ExampleCommandPipe() {
+	out, err := sh.Command("echo", "-n", "hi").Command("wc", "-c").Output()
+	fmt.Println(string(out), err)
+}
+
+func ExampleCommandSetDir() {
+	out, err := sh.Command("pwd", sh.Dir("/")).Output()
+	fmt.Println(string(out), err)
+}
+
+func ExampleTest() {
+	if sh.Test("dir", "mydir") {
+		fmt.Println("mydir exists")
+	}
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/pipe.go

@@ -0,0 +1,148 @@
+package sh
+
+import (
+	"bytes"
+	"encoding/json"
+	"encoding/xml"
+	"errors"
+	"io"
+	"os"
+	"strings"
+	"syscall"
+	"time"
+)
+
+var ErrExecTimeout = errors.New("execute timeout")
+
+// unmarshal shell output to decode json
+func (s *Session) UnmarshalJSON(data interface{}) (err error) {
+	bufrw := bytes.NewBuffer(nil)
+	s.Stdout = bufrw
+	if err = s.Run(); err != nil {
+		return
+	}
+	return json.NewDecoder(bufrw).Decode(data)
+}
+
+// unmarshal command output into xml
+func (s *Session) UnmarshalXML(data interface{}) (err error) {
+	bufrw := bytes.NewBuffer(nil)
+	s.Stdout = bufrw
+	if err = s.Run(); err != nil {
+		return
+	}
+	return xml.NewDecoder(bufrw).Decode(data)
+}
+
+// start command
+func (s *Session) Start() (err error) {
+	s.started = true
+	var rd *io.PipeReader
+	var wr *io.PipeWriter
+	var length = len(s.cmds)
+	if s.ShowCMD {
+		var cmds = make([]string, 0, 4)
+		for _, cmd := range s.cmds {
+			cmds = append(cmds, strings.Join(cmd.Args, " "))
+		}
+		s.writePrompt(strings.Join(cmds, " | "))
+	}
+	for index, cmd := range s.cmds {
+		if index == 0 {
+			cmd.Stdin = s.Stdin
+		} else {
+			cmd.Stdin = rd
+		}
+		if index != length {
+			rd, wr = io.Pipe() // create pipe
+			cmd.Stdout = wr
+			cmd.Stderr = os.Stderr
+		}
+		if index == length-1 {
+			cmd.Stdout = s.Stdout
+			cmd.Stderr = s.Stderr
+		}
+		err = cmd.Start()
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+// Should be call after Start()
+// only catch the last command error
+func (s *Session) Wait() (err error) {
+	for _, cmd := range s.cmds {
+		err = cmd.Wait()
+		wr, ok := cmd.Stdout.(*io.PipeWriter)
+		if ok {
+			wr.Close()
+		}
+	}
+	return err
+}
+
+func (s *Session) Kill(sig os.Signal) {
+	for _, cmd := range s.cmds {
+		if cmd.Process != nil {
+			cmd.Process.Signal(sig)
+		}
+	}
+}
+
+func (s *Session) WaitTimeout(timeout time.Duration) (err error) {
+	select {
+	case <-time.After(timeout):
+		s.Kill(syscall.SIGKILL)
+		return ErrExecTimeout
+	case err = <-Go(s.Wait):
+		return err
+	}
+}
+
+func Go(f func() error) chan error {
+	ch := make(chan error)
+	go func() {
+		ch <- f()
+	}()
+	return ch
+}
+
+func (s *Session) Run() (err error) {
+	if err = s.Start(); err != nil {
+		return
+	}
+	if s.timeout != time.Duration(0) {
+		return s.WaitTimeout(s.timeout)
+	}
+	return s.Wait()
+}
+
+func (s *Session) Output() (out []byte, err error) {
+	oldout := s.Stdout
+	defer func() {
+		s.Stdout = oldout
+	}()
+	stdout := bytes.NewBuffer(nil)
+	s.Stdout = stdout
+	err = s.Run()
+	out = stdout.Bytes()
+	return
+}
+
+func (s *Session) CombinedOutput() (out []byte, err error) {
+	oldout := s.Stdout
+	olderr := s.Stderr
+	defer func() {
+		s.Stdout = oldout
+		s.Stderr = olderr
+	}()
+	stdout := bytes.NewBuffer(nil)
+	s.Stdout = stdout
+	s.Stderr = stdout
+
+	err = s.Run()
+	out = stdout.Bytes()
+	return
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/pipe_test.go

@@ -0,0 +1,126 @@
+package sh
+
+import (
+	"encoding/xml"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestUnmarshalJSON(t *testing.T) {
+	var a int
+	s := NewSession()
+	s.ShowCMD = true
+	err := s.Command("echo", []string{"1"}).UnmarshalJSON(&a)
+	if err != nil {
+		t.Error(err)
+	}
+	if a != 1 {
+		t.Errorf("expect a tobe 1, but got %d", a)
+	}
+}
+
+func TestUnmarshalXML(t *testing.T) {
+	s := NewSession()
+	xmlSample := `<?xml version="1.0" encoding="utf-8"?>
+<server version="1" />`
+	type server struct {
+		XMLName xml.Name `xml:"server"`
+		Version string   `xml:"version,attr"`
+	}
+	data := &server{}
+	s.Command("echo", xmlSample).UnmarshalXML(data)
+	if data.Version != "1" {
+		t.Error(data)
+	}
+}
+
+func TestPipe(t *testing.T) {
+	s := NewSession()
+	s.ShowCMD = true
+	s.Call("echo", "hello")
+	err := s.Command("echo", "hi").Command("cat", "-n").Start()
+	if err != nil {
+		t.Error(err)
+	}
+	err = s.Wait()
+	if err != nil {
+		t.Error(err)
+	}
+	out, err := s.Command("echo", []string{"hello"}).Output()
+	if err != nil {
+		t.Error(err)
+	}
+	if string(out) != "hello\n" {
+		t.Error("capture wrong output:", out)
+	}
+	s.Command("echo", []string{"hello\tworld"}).Command("cut", []string{"-f2"}).Run()
+}
+
+func TestPipeCommand(t *testing.T) {
+	c1 := exec.Command("echo", "good")
+	rd, wr := io.Pipe()
+	c1.Stdout = wr
+	c2 := exec.Command("cat", "-n")
+	c2.Stdout = os.Stdout
+	c2.Stdin = rd
+	c1.Start()
+	c2.Start()
+
+	c1.Wait()
+	wc, ok := c1.Stdout.(io.WriteCloser)
+	if ok {
+		wc.Close()
+	}
+	c2.Wait()
+}
+
+func TestPipeInput(t *testing.T) {
+	s := NewSession()
+	s.ShowCMD = true
+	s.SetInput("first line\nsecond line\n")
+	out, err := s.Command("grep", "second").Output()
+	if err != nil {
+		t.Error(err)
+	}
+	if string(out) != "second line\n" {
+		t.Error("capture wrong output:", out)
+	}
+}
+
+func TestTimeout(t *testing.T) {
+	s := NewSession()
+	err := s.Command("sleep", "2").Start()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = s.WaitTimeout(time.Second)
+	if err != ErrExecTimeout {
+		t.Fatal(err)
+	}
+}
+
+func TestSetTimeout(t *testing.T) {
+	s := NewSession()
+	s.SetTimeout(time.Second)
+	defer s.SetTimeout(0)
+	err := s.Command("sleep", "2").Run()
+	if err != ErrExecTimeout {
+		t.Fatal(err)
+	}
+}
+
+func TestCombinedOutput(t *testing.T) {
+	s := NewSession()
+	bytes, err := s.Command("sh", "-c", "echo stderr >&2 ; echo stdout").CombinedOutput()
+	if err != nil {
+		t.Error(err)
+	}
+	stringOutput := string(bytes)
+	if !(strings.Contains(stringOutput, "stdout") && strings.Contains(stringOutput, "stderr")) {
+		t.Errorf("expect output from both output streams, got '%s'", strings.TrimSpace(stringOutput))
+	}
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/sh.go

@@ -0,0 +1,200 @@
+/*
+Package go-sh is intented to make shell call with golang more easily.
+Some usage is more similar to os/exec, eg: Run(), Output(), Command(name, args...)
+
+But with these similar function, pipe is added in and this package also got shell-session support.
+
+Why I love golang so much, because the usage of golang is simple, but the power is unlimited. I want to make this pakcage got the sample style like golang.
+
+	// just like os/exec
+	sh.Command("echo", "hello").Run()
+
+	// support pipe
+	sh.Command("echo", "hello").Command("wc", "-c").Run()
+
+	// create a session to store dir and env
+	sh.NewSession().SetDir("/").Command("pwd")
+
+	// shell buildin command - "test"
+	sh.Test("dir", "mydir")
+
+	// like shell call: (cd /; pwd)
+	sh.Command("pwd", sh.Dir("/")) same with sh.Command(sh.Dir("/"), "pwd")
+
+	// output to json and xml easily
+	v := map[string] int {}
+	err = sh.Command("echo", `{"number": 1}`).UnmarshalJSON(&v)
+*/
+package sh
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"reflect"
+	"strings"
+	"time"
+
+	"github.com/codegangsta/inject"
+)
+
+type Dir string
+
+type Session struct {
+	inj     inject.Injector
+	alias   map[string][]string
+	cmds    []*exec.Cmd
+	dir     Dir
+	started bool
+	Env     map[string]string
+	Stdin   io.Reader
+	Stdout  io.Writer
+	Stderr  io.Writer
+	ShowCMD bool // enable for debug
+	timeout time.Duration
+}
+
+func (s *Session) writePrompt(args ...interface{}) {
+	var ps1 = fmt.Sprintf("[golang-sh]$")
+	args = append([]interface{}{ps1}, args...)
+	fmt.Fprintln(s.Stderr, args...)
+}
+
+func NewSession() *Session {
+	env := make(map[string]string)
+	for _, key := range []string{"PATH"} {
+		env[key] = os.Getenv(key)
+	}
+	s := &Session{
+		inj:    inject.New(),
+		alias:  make(map[string][]string),
+		dir:    Dir(""),
+		Stdin:  strings.NewReader(""),
+		Stdout: os.Stdout,
+		Stderr: os.Stderr,
+		Env:    env,
+	}
+	return s
+}
+
+func InteractiveSession() *Session {
+	s := NewSession()
+	s.SetStdin(os.Stdin)
+	return s
+}
+
+func Command(name string, a ...interface{}) *Session {
+	s := NewSession()
+	return s.Command(name, a...)
+}
+
+func Echo(in string) *Session {
+	s := NewSession()
+	return s.SetInput(in)
+}
+
+func (s *Session) Alias(alias, cmd string, args ...string) {
+	v := []string{cmd}
+	v = append(v, args...)
+	s.alias[alias] = v
+}
+
+func (s *Session) Command(name string, a ...interface{}) *Session {
+	var args = make([]string, 0)
+	var sType = reflect.TypeOf("")
+
+	// init cmd, args, dir, envs
+	// if not init, program may panic
+	s.inj.Map(name).Map(args).Map(s.dir).Map(map[string]string{})
+	for _, v := range a {
+		switch reflect.TypeOf(v) {
+		case sType:
+			args = append(args, v.(string))
+		default:
+			s.inj.Map(v)
+		}
+	}
+	if len(args) != 0 {
+		s.inj.Map(args)
+	}
+	s.inj.Invoke(s.appendCmd)
+	return s
+}
+
+// combine Command and Run
+func (s *Session) Call(name string, a ...interface{}) error {
+	return s.Command(name, a...).Run()
+}
+
+/*
+func (s *Session) Exec(cmd string, args ...string) error {
+	return s.Call(cmd, args)
+}
+*/
+
+func (s *Session) SetEnv(key, value string) *Session {
+	s.Env[key] = value
+	return s
+}
+
+func (s *Session) SetDir(dir string) *Session {
+	s.dir = Dir(dir)
+	return s
+}
+
+func (s *Session) SetInput(in string) *Session {
+	s.Stdin = strings.NewReader(in)
+	return s
+}
+
+func (s *Session) SetStdin(r io.Reader) *Session {
+	s.Stdin = r
+	return s
+}
+
+func (s *Session) SetTimeout(d time.Duration) *Session {
+	s.timeout = d
+	return s
+}
+
+func newEnviron(env map[string]string, inherit bool) []string { //map[string]string {
+	environ := make([]string, 0, len(env))
+	if inherit {
+		for _, line := range os.Environ() {
+			for k, _ := range env {
+				if strings.HasPrefix(line, k+"=") {
+					goto CONTINUE
+				}
+			}
+			environ = append(environ, line)
+		CONTINUE:
+		}
+	}
+	for k, v := range env {
+		environ = append(environ, k+"="+v)
+	}
+	return environ
+}
+
+func (s *Session) appendCmd(cmd string, args []string, cwd Dir, env map[string]string) {
+	if s.started {
+		s.started = false
+		s.cmds = make([]*exec.Cmd, 0)
+	}
+	for k, v := range s.Env {
+		if _, ok := env[k]; !ok {
+			env[k] = v
+		}
+	}
+	environ := newEnviron(s.Env, true) // true: inherit sys-env
+	v, ok := s.alias[cmd]
+	if ok {
+		cmd = v[0]
+		args = append(v[1:], args...)
+	}
+	c := exec.Command(cmd, args...)
+	c.Env = environ
+	c.Dir = string(cwd)
+	s.cmds = append(s.cmds, c)
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/sh_test.go

@@ -0,0 +1,106 @@
+package sh
+
+import (
+	"fmt"
+	"log"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+func TestAlias(t *testing.T) {
+	s := NewSession()
+	s.Alias("gr", "echo", "hi")
+	out, err := s.Command("gr", "sky").Output()
+	if err != nil {
+		t.Error(err)
+	}
+	if string(out) != "hi sky\n" {
+		t.Errorf("expect 'hi sky' but got:%s", string(out))
+	}
+}
+
+func ExampleSession_Command() {
+	s := NewSession()
+	out, err := s.Command("echo", "hello").Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(string(out))
+	// Output: hello
+}
+
+func ExampleSession_Command_pipe() {
+	s := NewSession()
+	out, err := s.Command("echo", "hello", "world").Command("awk", "{print $2}").Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(string(out))
+	// Output: world
+}
+
+func ExampleSession_Alias() {
+	s := NewSession()
+	s.Alias("alias_echo_hello", "echo", "hello")
+	out, err := s.Command("alias_echo_hello", "world").Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(string(out))
+	// Output: hello world
+}
+
+func TestEcho(t *testing.T) {
+	out, err := Echo("one two three").Command("wc", "-w").Output()
+	if err != nil {
+		t.Error(err)
+	}
+	if strings.TrimSpace(string(out)) != "3" {
+		t.Errorf("expect '3' but got:%s", string(out))
+	}
+}
+
+func TestSession(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		t.Log("ignore test on windows")
+		return
+	}
+	session := NewSession()
+	session.ShowCMD = true
+	err := session.Call("pwd")
+	if err != nil {
+		t.Error(err)
+	}
+	out, err := session.SetDir("/").Command("pwd").Output()
+	if err != nil {
+		t.Error(err)
+	}
+	if string(out) != "/\n" {
+		t.Errorf("expect /, but got %s", string(out))
+	}
+}
+
+/*
+	#!/bin/bash -
+	#
+	export PATH=/usr/bin:/bin
+	alias ll='ls -l'
+	cd /usr
+	if test -d "local"
+	then
+		ll local | awk '{print $1, $NF}' | grep bin
+	fi
+*/
+func Example(t *testing.T) {
+	s := NewSession()
+	//s.ShowCMD = true
+	s.Env["PATH"] = "/usr/bin:/bin"
+	s.SetDir("/bin")
+	s.Alias("ll", "ls", "-l")
+
+	if s.Test("d", "local") {
+		//s.Command("ll", []string{"local"}).Command("awk", []string{"{print $1, $NF}"}).Command("grep", []string{"bin"}).Run()
+		s.Command("ll", "local").Command("awk", "{print $1, $NF}").Command("grep", "bin").Run()
+	}
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/test.go

@@ -0,0 +1,64 @@
+package sh
+
+import (
+	"os"
+	"path/filepath"
+)
+
+func filetest(name string, modemask os.FileMode) (match bool, err error) {
+	fi, err := os.Stat(name)
+	if err != nil {
+		return
+	}
+	match = (fi.Mode() & modemask) == modemask
+	return
+}
+
+func (s *Session) pwd() string {
+	dir := string(s.dir)
+	if dir == "" {
+		dir, _ = os.Getwd()
+	}
+	return dir
+}
+
+func (s *Session) abspath(name string) string {
+	if filepath.IsAbs(name) {
+		return name
+	}
+	return filepath.Join(s.pwd(), name)
+}
+
+func init() {
+	//log.SetFlags(log.Lshortfile | log.LstdFlags)
+}
+
+// expression can be dir, file, link
+func (s *Session) Test(expression string, argument string) bool {
+	var err error
+	var fi os.FileInfo
+	fi, err = os.Lstat(s.abspath(argument))
+	switch expression {
+	case "d", "dir":
+		return err == nil && fi.IsDir()
+	case "f", "file":
+		return err == nil && fi.Mode().IsRegular()
+	case "x", "executable":
+		/*
+			fmt.Println(expression, argument)
+			if err == nil {
+				fmt.Println(fi.Mode())
+			}
+		*/
+		return err == nil && fi.Mode()&os.FileMode(0100) != 0
+	case "L", "link":
+		return err == nil && fi.Mode()&os.ModeSymlink != 0
+	}
+	return false
+}
+
+// expression can be d,dir, f,file, link
+func Test(exp string, arg string) bool {
+	s := NewSession()
+	return s.Test(exp, arg)
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/test_test.go

@@ -0,0 +1,58 @@
+package sh_test
+
+import (
+	"testing"
+
+	"github.com/codeskyblue/go-sh"
+)
+
+var s = sh.NewSession()
+
+type T struct{ *testing.T }
+
+func NewT(t *testing.T) *T {
+	return &T{t}
+}
+
+func (t *T) checkTest(exp string, arg string, result bool) {
+	r := s.Test(exp, arg)
+	if r != result {
+		t.Errorf("test -%s %s, %v != %v", exp, arg, r, result)
+	}
+}
+
+func TestTest(i *testing.T) {
+	t := NewT(i)
+	t.checkTest("d", "../go-sh", true)
+	t.checkTest("d", "./yymm", false)
+
+	// file test
+	t.checkTest("f", "testdata/hello.txt", true)
+	t.checkTest("f", "testdata/xxxxx", false)
+	t.checkTest("f", "testdata/yymm", false)
+
+	// link test
+	t.checkTest("link", "testdata/linkfile", true)
+	t.checkTest("link", "testdata/xxxxxlinkfile", false)
+	t.checkTest("link", "testdata/hello.txt", false)
+
+	// executable test
+	t.checkTest("x", "testdata/executable", true)
+	t.checkTest("x", "testdata/xxxxx", false)
+	t.checkTest("x", "testdata/hello.txt", false)
+}
+
+func ExampleShellTest(t *testing.T) {
+	// test -L
+	sh.Test("link", "testdata/linkfile")
+	sh.Test("L", "testdata/linkfile")
+	// test -f
+	sh.Test("file", "testdata/file")
+	sh.Test("f", "testdata/file")
+	// test -x
+	sh.Test("executable", "testdata/binfile")
+	sh.Test("x", "testdata/binfile")
+	// test -d
+	sh.Test("dir", "testdata/dir")
+	sh.Test("d", "testdata/dir")
+}

plugins/common/vendor/github.com/codeskyblue/go-sh/testdata/linkfile

@@ -0,0 +1 @@
+hello.txt

plugins/common/vendor/github.com/codeskyblue/go-sh/wercker.yml

@@ -0,0 +1,28 @@
+box: wercker/golang
+# Build definition
+build:
+  # The steps that will be executed on build
+  steps:
+    # Sets the go workspace and places you package
+    # at the right place in the workspace tree
+    - setup-go-workspace
+
+    # Gets the dependencies
+    - script:
+        name: go get
+        code: |
+          cd $WERCKER_SOURCE_DIR
+          go version
+          go get -t .
+
+    # Build the project
+    - script:
+        name: go build
+        code: |
+          go build .
+
+    # Test the project
+    - script:
+        name: go test
+        code: |
+          go test -v ./...