/*
goredo -- djb's redo implementation on pure Go
-Copyright (C) 2020-2022 Sergey Matveev <stargrave@stargrave.org>
+Copyright (C) 2020-2023 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
}
func mkdirs(pth string) error {
- if _, err := os.Stat(pth); err == nil {
+ if FileExists(pth) {
return nil
}
return os.MkdirAll(pth, os.FileMode(0777))
return err
}
-func runScript(tgtOrig string, errs chan error, traced bool) error {
+func runScript(tgtOrig string, errs chan error, forced, traced bool) error {
cwd, tgt := cwdAndTgt(tgtOrig)
redoDir := path.Join(cwd, RedoDir)
if err := mkdirs(redoDir); err != nil {
tracef(CLock, "LOCK_UN: %s", fdLock.Name())
flock.Type = unix.F_UNLCK
if err := unix.FcntlFlock(fdLock.Fd(), unix.F_SETLK, &flock); err != nil {
- log.Fatalln(err)
+ log.Fatalln(err, fdLock.Name())
}
fdLock.Close()
}
}
Jobs.Add(1)
if err = unix.FcntlFlock(fdLock.Fd(), unix.F_GETLK, &flock); err != nil {
- log.Fatalln(err)
+ log.Fatalln(err, fdLock.Name())
}
tracef(CDebug, "waiting: %s (pid=%d)", tgtOrig, flock.Pid)
if FdStatus != nil {
go func() {
defer Jobs.Done()
tracef(CLock, "LOCK_EX: %s", fdLock.Name())
+ takeTries := 0
+ LockAgain:
if err := unix.FcntlFlock(fdLock.Fd(), unix.F_SETLKW, &flock); err != nil {
- log.Fatalln(err)
+ time.Sleep(10 * time.Millisecond)
+ takeTries++
+ if takeTries%10 == 0 {
+ log.Println(err, fdLock.Name(), "after", takeTries, "attempts")
+ }
+ goto LockAgain
}
lockRelease()
tracef(CDebug, "waiting done: %s", tgtOrig)
return nil
}
+ // Check if it was already built in parallel
+ if !forced {
+ if fdDep, err := os.Open(path.Join(redoDir, tgt+DepSuffix)); err == nil {
+ depInfo, err := depRead(fdDep)
+ fdDep.Close()
+ if err == nil && depInfo.build == BuildUUID {
+ lockRelease()
+ errs <- nil
+ return nil
+ }
+ }
+ }
+
// Check if target is not modified externally
modified, inodePrev, hshPrev, err := isModified(cwd, redoDir, tgt)
if err != nil {
os.Remove(fdDep.Name())
os.Remove(fdStdout.Name())
os.Remove(tmpPath)
- os.Remove(fdLock.Name())
if FdStatus != nil {
if _, err = FdStatus.Write([]byte{StatusDone}); err != nil {
log.Fatalln(err)