Exec Util

executil is a Go (golang) package that wraps os/exec. It extends cmd.Start() to automatically output the cmd's stderr and stdout pipes to the terminal or to a supplied channel.

Install

go get -u github.com/jesselucas/executil

Usage

StartAndWait

This will automatically Println the stdout and stderr pipes to the terminal and Wait for command to finish.

cmd := executil.Command("echo", "test echo")
err := cmd.StartAndWait()
if err != nil {
  log.Fatal(err)
}

Resulting output: [echo] test echo

OutputChan

Optionally you can pass an output channel to send the command stdout and stderr output. If there is an output channel set CmdStart will not print the output but instead send it to the channel.

outputChan := make(chan string)

cmd := executil.Command("echo", "test echo")
cmd.OutputChan = outputChan

err := cmd.StartAndWait()

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

OutputPrefix

Optionally you can pass an output prefix string to be included in the stdout and stderr output. By default it will use the command you run.

cmd := executil.Command("echo", "test echo")
cmd.OutputPrefix = "echoandthebunnymen"

err := cmd.StartAndWait()

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

Resulting output: [echoandthebunnymen] test echo

ShowOutput

By default ShowOutput is true you can set it to false if you need to.

cmd := executil.Command("echo", "test echo")
cmd.ShowOutput = false

err := cmd.StartAndWait()

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