X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=js.go;h=2efdd162e84a20160118a517366ad89212dd05b0;hb=9e1cd5bf6c54ecad62b38a4f9eb2192e2924e46c;hp=9f2adaa5abb1982bb0fc3d1f79c52fd609cee126;hpb=edb601644735972fac3efcdc27849b5b9b1f5fb7;p=goredo.git

diff --git a/js.go b/js.go
index 9f2adaa..2efdd16 100644
--- a/js.go
+++ b/js.go
@@ -1,5 +1,5 @@
 /*
-goredo -- redo implementation on pure Go
+goredo -- djb's redo implementation on pure Go
 Copyright (C) 2020-2021 Sergey Matveev <stargrave@stargrave.org>
 
 This program is free software: you can redistribute it and/or modify
@@ -42,7 +42,7 @@ var (
 	jsTokens  int
 	jsTokensM sync.Mutex
 
-	flagJobs = flag.Uint64("j", 1, fmt.Sprintf("number of parallel jobs (0=inf) (%s)", EnvJobs))
+	flagJobs = flag.Int("j", -1, fmt.Sprintf("number of parallel jobs (0=inf, <0=1) (%s)", EnvJobs))
 )
 
 func jsInit() {
@@ -73,22 +73,23 @@ func jsInit() {
 		return
 	}
 
-	var jobs uint64
-	if v := os.Getenv(EnvJobs); v != "" {
-		var err error
+	jobs := uint64(1)
+	var err error
+	if *flagJobs == 0 {
+		jobs = 0
+	} else if *flagJobs > 0 {
+		jobs = uint64(*flagJobs)
+	} else if v := os.Getenv(EnvJobs); v != "" {
 		jobs, err = strconv.ParseUint(v, 10, 64)
 		if err != nil {
 			log.Fatalln("can not parse", EnvJobs, err)
 		}
-	} else {
-		jobs = *flagJobs
 	}
 	if jobs == 0 {
 		// infinite jobs
 		return
 	}
 
-	var err error
 	JSR, JSW, err = os.Pipe()
 	if err != nil {
 		panic(err)