commit f99915f5695568ea73be144a07c3c9b9c8ac03fa
author Dan Willemsen <dwillemsen@google.com> Thu Oct 25 22:04:42 2018 -0700
committer Dan Willemsen <dwillemsen@google.com> Mon Oct 29 10:43:37 2018 -0700
tree 2123a1b29bbc2c08689e47f360b4d6d9f11f48d1
parent 67df651c3ab669619fc018ecefad2b39e6b91ff2

Speed up build_test

Stop writing out ninja files, as they become very large, especially when
multiplied by the number of defined products.

Test: treehugger
Change-Id: Id9529d14040acb72a0188e58b5db2911f142071e

cmd/multiproduct_kati/main.go

diff --git a/cmd/multiproduct_kati/main.go b/cmd/multiproduct_kati/main.go
index 9cb75fa..6a3d579 100644
--- a/cmd/multiproduct_kati/main.go
+++ b/cmd/multiproduct_kati/main.go
@@ -393,6 +393,9 @@
 
 	config := build.NewConfig(ctx, flag.Args()...)
 	config.Environment().Set("OUT_DIR", outDir)
+	if !*keepArtifacts {
+		config.Environment().Set("EMPTY_NINJA_FILE", "true")
+	}
 	build.FindSources(ctx, config, mpctx.Finder)
 	config.Lunch(ctx, product, *buildVariant)
 
@@ -413,12 +416,7 @@
 				log.Fatalf("Error zipping artifacts: %v", err)
 			}
 		}
-		if *incremental {
-			// Save space, Kati doesn't notice
-			if f := config.KatiBuildNinjaFile(); f != "" {
-				os.Truncate(f, 0)
-			}
-		} else {
+		if !*incremental {
 			os.RemoveAll(outDir)
 		}
 	}()