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dwelling-radio/internal/radio/liquidsoap.go

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package radio
import (
"os/exec"
"syscall"
"github.com/pkg/errors"
)
var ErrLiquidsoapNotRunning = errors.New("liquidsoap is not running")
type Liquidsoap struct {
command *exec.Cmd
}
func NewLiquidsoap(liquidsoapPath, scriptPath string) (*Liquidsoap, error) {
if _, err := exec.LookPath(liquidsoapPath); err != nil {
return nil, err
}
out, err := exec.Command(liquidsoapPath, "--verbose", "-c", scriptPath).CombinedOutput()
if err != nil {
return nil, errors.Wrap(err, "script cannot be validated")
}
if len(out) > 0 {
return nil, errors.Errorf("script validation failed: %s", string(out))
}
cmd := exec.Command(liquidsoapPath, scriptPath)
if err := cmd.Start(); err != nil {
return nil, err
}
return &Liquidsoap{
command: cmd}, nil
}
func (l *Liquidsoap) Stop() error {
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if l.command.Process == nil && l.command.ProcessState != nil {
return ErrLiquidsoapNotRunning
}
if err := l.command.Process.Signal(syscall.SIGINT); err != nil {
return err
}
if err := l.command.Wait(); err != nil {
return err
}
return nil
}