X-Git-Url: http://www.git.cypherpunks.ru/?a=blobdiff_plain;f=ifchange.go;h=cbf1c05dbebb81014ad668903d2962c8a9f3fb0c;hb=fed124f1460226ab037657bac5717bdb49bf6b78;hp=913ddba83ee8f5a1fc9db0c7fa4df1bf4e922066;hpb=b813667339b846924bb87a30f0c12bc998154ff6;p=goredo.git

diff --git a/ifchange.go b/ifchange.go
index 913ddba..cbf1c05 100644
--- a/ifchange.go
+++ b/ifchange.go
@@ -1,6 +1,6 @@
 /*
 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
@@ -98,7 +98,7 @@ func buildDependants(tgts []string) map[string]struct{} {
 		}
 	}
 	if len(seen) == 0 {
-		return nil
+		return seen
 	}
 
 	levelOrig := Level
@@ -135,17 +135,18 @@ func buildDependants(tgts []string) map[string]struct{} {
 
 RebuildDeps:
 	tracef(CDebug, "checking %d dependant targets: %v", len(queueSrc), queueSrc)
-	queue := []string{}
+	queue := map[string]struct{}{}
 	for _, tgt := range queueSrc {
 		for dep := range deps[tgt] {
-			queue = append(queue, dep)
+			queue[dep] = struct{}{}
 		}
 	}
+
 	tracef(CDebug, "building %d dependant targets: %v", len(queue), queue)
 	errs = make(chan error, len(queue))
 	jobs := 0
 	queueSrc = []string{}
-	for _, tgt := range queue {
+	for tgt, _ := range queue {
 		ood, err := isOODWithTrace(Cwd, tgt, 0, seen)
 		if err != nil {
 			tracef(CErr, "dependant error: %s, skipping dependants", err)
@@ -196,6 +197,9 @@ func ifchange(tgts []string, forced, traced bool) (bool, error) {
 	}
 	defer Jobs.Wait()
 	seen := buildDependants(tgts)
+	if seen == nil {
+		return false, nil
+	}
 	oodTgtsClear()
 	tracef(CDebug, "building %d targets: %v", len(tgts), tgts)
 	jobs := 0