So what is go-sh. Sometimes we need to write some shell scripts, but shell scripts is not good at cross platform, but golang is good at that. Is there a good way to use golang to write scripts like shell? Use go-sh we can do it now.
go-sh support some shell futures.
- shell session
export: envalias: like alias ll='ls -l'cd: remember current dir- pipe
test: this is shell build command, very usefull(support -d and -f)
Example is always important. I will show you how to use it.
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")
var err error
err = session.Call("ll", []string{"/"})
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 /
empty args filled in Call will call last command
session.Call() # will call echo hi again
pipe is also supported
session.Command("echo", []string{"hello\tworld"}).Command("cut", []string{"-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", []string{"local"}).Command("awk", []string{"{print $1, $NF}"}).Run()
}
If you love this project, star it which will encourage the coder. pull requests are welcomed, if you want to add some new fetures.
support the author: alipay
this project is based on http://github.com/codegangsta/inject. thanks for the author.
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