From: Sergey Matveev <stargrave@stargrave.org>
Date: Mon, 14 Nov 2022 14:19:49 +0000 (+0300)
Subject: Explicitly process only unique targets
X-Git-Tag: v1.28.0~4
X-Git-Url: http://www.git.cypherpunks.ru/?p=goredo.git;a=commitdiff_plain;h=b813667339b846924bb87a30f0c12bc998154ff6

Explicitly process only unique targets
---

diff --git a/ifchange.go b/ifchange.go
index 922939b..913ddba 100644
--- a/ifchange.go
+++ b/ifchange.go
@@ -179,6 +179,17 @@ RebuildDeps:
 }
 
 func ifchange(tgts []string, forced, traced bool) (bool, error) {
+	// only unique elements
+	m := make(map[string]struct{})
+	for _, t := range tgts {
+		m[t] = struct{}{}
+	}
+	tgts = tgts[:0]
+	for t := range m {
+		tgts = append(tgts, t)
+	}
+	m = nil
+
 	jsInit()
 	if !IsTopRedo {
 		defer jsAcquire("ifchange exiting")