convert repo plugin to golang

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.