how to embed powershell script inside GO program to build 1 binary

user_17552023 0
Viewed 476

I like to embed some powershell scripts in 1 Go binary. How can I embed them and execute the commands from GO. Currently I got it by running an external script

//

out,err := exec.Command("Powershell", "-file" , "C:\\test\\go\\my.ps1").Output()
if err != nil {
     log.Fatal(err)

}

fmt.Printf("Data from powershell script is: %s", out)

//

my.ps1 content

[System.Security.Principal.WindowsIdentity]::GetCurrent().Name

//

I got a few more powershell scripts, I like to add the powershell scripts into my go binary file. Have tryed a few things I did find on the internet but failed.

script go embed powershell
2 Answers

Embed your asset:

import (
    _ "embed"
)

//go:embed my.ps1
var shellBody []byte

and then when you need the host OS to access this, surface it via a temp file:

tmp, err := ioutil.TempFile("/tmp", "powershell.*.ps1")
if err != nil {
    log.Fatal(err)
}
defer os.Remove(tmp.Name()) // clean-up when done


f, err := os.OpenFile(tmp.Name(), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
    log.Fatal(err)
}

_, err = f.Write(shellBody)
if err != nil {
    log.Fatal(err)
}

err = f.Close()
if err != nil {
    log.Fatal(err)
}

then you can invoke Powershell:

out, err := exec.Command("Powershell", "-file" , tmp.Name()).Output()
if err != nil {
    log.Fatal(err)
}
user_12185120

You can use go1.16 and embed, you should create a separated folder to save the embed file definitions, then use another function to return the string or byte[] file reference.

package main

import (
    "embed"
    "text/template"
)

var (
    // file.txt resides in a separated folder
    //go:embed file.txt
    myfile string
)

func main() {
    fmt.Printf("File %q\n", myfile)
}
user_132221540
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