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Implemented a liquidsoap process launcher.

This commit is contained in:
Alexander Andreev 2022-08-29 07:20:36 +04:00
parent b2791aa13a
commit 0da8077ab7
Signed by: Arav
GPG Key ID: 0388CC8FAA51063F

View File

@ -0,0 +1,63 @@
package liquidsoap
import (
"fmt"
"os"
"os/exec"
"syscall"
"time"
"github.com/pkg/errors"
)
var ErrNotRunning = errors.New("liquidsoap is not running")
type Liquidsoap struct {
command *exec.Cmd
}
func NewLiquidsoap(liquidsoapPath, scriptPath string) (*Liquidsoap, error) {
cmd := exec.Command(liquidsoapPath, scriptPath)
if err := cmd.Start(); err != nil {
return nil, err
}
// If there are errors in a script this time will be sufficient to wait
// for them to occure.
time.Sleep(4 * time.Second)
if _, err := os.FindProcess(cmd.Process.Pid); err != nil {
stderr, _ := cmd.StderrPipe()
var stderr_content string
fmt.Fscanln(stderr, &stderr_content)
if err_wait := cmd.Wait(); err != nil {
return nil, errors.Wrapf(err_wait, "%s: %s", err.Error(), stderr_content)
}
return nil, errors.Wrapf(err, "%s: %s", err.Error(), stderr_content)
}
return &Liquidsoap{
command: cmd}, nil
}
func (l *Liquidsoap) Stop() error {
if !l.IsRunning() {
return ErrNotRunning
}
if err := l.command.Process.Signal(syscall.SIGINT); err != nil {
return err
}
if err := l.command.Wait(); err != nil {
return err
}
return nil
}
func (l *Liquidsoap) IsRunning() bool {
return l.command.Process != nil && l.command.ProcessState == nil
}