71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
package common
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import (
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"fmt"
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"os/exec"
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"syscall"
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"time"
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)
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// SpawnProcess spawns a child process for the given repo. The process will
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// be stopped early if the repo receives a stop signal, or if the process
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// runs for longer than the repo's MaxTime.
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// It returns a channel through which a Cmd will be sent once it has finished,
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// or nil if it was unable to start a process.
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func SpawnProcess(repo *Repo, args []string) (ch <-chan *exec.Cmd) {
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// startTime and time took will be handled in common.go by SyncExit
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cmd := exec.Command(args[0], args[1:]...)
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repo.Logger.Debug("Starting process")
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if err := cmd.Start(); err != nil {
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repo.Logger.Error(fmt.Errorf("could not start process for %s: %w", repo.Name, err).Error())
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return
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}
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cmdChan := make(chan *exec.Cmd)
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ch = cmdChan
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cmdDoneChan := make(chan struct{})
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killProcess := func() {
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err := cmd.Process.Signal(syscall.SIGTERM)
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if err != nil {
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repo.Logger.Error("Could not send signal to process:", err)
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return
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}
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select {
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case <-time.After(30 * time.Second):
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repo.Logger.Warning("Process still hasn't stopped after 30 seconds; sending SIGKILL")
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cmd.Process.Signal(syscall.SIGKILL)
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case <-cmdDoneChan:
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repo.Logger.Debug("Process has been stopped.")
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}
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}
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go func() {
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cmd.Wait()
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close(cmdDoneChan)
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}()
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go func() {
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defer func() {
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cmdChan <- cmd
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}()
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select {
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case <-cmdDoneChan:
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if !cmd.ProcessState.Success() {
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repo.Logger.Warning("Process ended with status code", cmd.ProcessState.ExitCode())
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}
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case <-repo.StopChan:
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repo.Logger.Debug("Received signal to stop, killing process...")
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killProcess()
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case <-time.After(time.Duration(repo.MaxTime) * time.Second):
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repo.Logger.Warning("Process has exceeded its max time; killing now")
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killProcess()
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}
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}()
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return
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}
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