Add SourceFileGenerator.GeneratedDeps()

To clean up unnecessary dependencies when using generated headers,
GeneratedDeps() should return a single file from every build entry.
GeneratedSourceFiles() used to be used from this, but now if you create
one build rule with multiple outputs, it's valid to only return a single
output file.

In this case, ModuleBuild is called once per source file, each
outputing a single output file, so all of them still need to be listed.

Bug: 73745773
Test: diff out/soong/build.ninja
Test: diff out/soong/Android-aosp_arm.mk
Test: rm -rf out; m
Change-Id: I073e3be7ecd9545f4002ad94d3da44f1a6652baa

1 files changed, 4 insertions, 0 deletions

diff --git a/soong/tblgen.go b/soong/tblgen.go
index b82c81efb0a1..b0067be36d0a 100644
--- a/soong/tblgen.go
+++ b/soong/tblgen.go
@@ -145,6 +145,10 @@ func (t *tblgen) GeneratedHeaderDirs() android.Paths {
 }
 
 func (t *tblgen) GeneratedSourceFiles() android.Paths {
+	return nil
+}
+
+func (t *tblgen) GeneratedDeps() android.Paths {
 	return t.generatedHeaders
 }