exec.Command example

builder_build.go

func (b *builder) Build() error {
	args := append([]string{"go", "build", "-o", filepath.Join(b.wd, b.binary)}, b.buildArgs...)

	var command *exec.Cmd
	if b.useGodep {
		args = append([]string{"godep"}, args...)
	}
	command = exec.Command(args[0], args[1:]...)

	command.Dir = b.dir

	output, err := command.CombinedOutput()

	if command.ProcessState.Success() {
		b.errors = ""
	} else {
		b.errors = string(output)
	}

	if len(b.errors) > 0 {
		return fmt.Errorf(b.errors)
	}

	return err
}