Allow not buffering the output of soong_build .
This behavior is enabled by setting the environment variable
SOONG_UNBUFFERED_OUTPUT=1 .
This is not the default behavior because only one process can be running
in the console pool and this would thus result in a loss of parallelism
if multiple soong_build invocations are needed.
Changing the value of this environment variable does not result in a
rebuild, since it does not affect the build outputs.
Test: Presubmits.
Change-Id: I49d15eb145966bd805f0a47b46866285203b122a
diff --git a/ui/build/soong.go b/ui/build/soong.go
index 5360342..55004fa 100644
--- a/ui/build/soong.go
+++ b/ui/build/soong.go
@@ -187,6 +187,11 @@
Outputs: []string{output},
Args: allArgs,
Description: description,
+ // NB: Changing the value of this environment variable will not result in a
+ // rebuild. The bootstrap Ninja file will change, but apparently Ninja does
+ // not consider changing the pool specified in a statement a change that's
+ // worth rebuilding for.
+ Console: os.Getenv("SOONG_UNBUFFERED_OUTPUT") == "1",
}
}
