From 772e21ba27c082bd8f66a80a3b1f8cc2f3f0ab07 Mon Sep 17 00:00:00 2001
From: LaMont Jones <lamontjones@google.com>
Date: Wed, 11 Oct 2023 17:58:14 +0000
Subject: [PATCH] Add support for PRODUCT_RELEASE_CONFIG_MAPS

This allows product config to determine what build flags are present in
a product's build, as well as their value.

As product config moves to a declarative specification, this can be
handled with less unnecessary work.

Bug: b/302593603
Test: manual
Change-Id: If6ae19e3da8471eaba8d6e048769f8ac6b244155
---
 ui/build/config.go   |  6 ++++++
 ui/build/dumpvars.go | 17 +++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/ui/build/config.go b/ui/build/config.go
index e581e8fbb..84568f802 100644
--- a/ui/build/config.go
+++ b/ui/build/config.go
@@ -120,6 +120,9 @@ type configImpl struct {
 	includeTags    []string
 	sourceRootDirs []string
 
+	productReleaseConfigMaps       string
+	productReleaseConfigMapsLoaded bool
+
 	// Data source to write ninja weight list
 	ninjaWeightListSource NinjaWeightListSource
 }
@@ -950,6 +953,9 @@ func (c *configImpl) configureLocale(ctx Context) {
 }
 
 func (c *configImpl) Environment() *Environment {
+	if c.productReleaseConfigMapsLoaded {
+		c.environ.Set("PRODUCT_RELEASE_CONFIG_MAPS", c.productReleaseConfigMaps)
+	}
 	return c.environ
 }
 
diff --git a/ui/build/dumpvars.go b/ui/build/dumpvars.go
index efe747819..360d0daf8 100644
--- a/ui/build/dumpvars.go
+++ b/ui/build/dumpvars.go
@@ -92,6 +92,20 @@ func dumpMakeVars(ctx Context, config Config, goals, vars []string, write_soong_
 	}
 	defer tool.Finish()
 
+	releaseConfigVars := []string{
+		"PRODUCT_RELEASE_CONFIG_MAPS",
+	}
+
+	if !config.productReleaseConfigMapsLoaded {
+		// Get the PRODUCT_RELEASE_CONFIG_MAPS for this product, to avoid polluting the environment
+		// when we run product config to get the rest of the make vars.
+		config.productReleaseConfigMapsLoaded = true
+		releaseMapVars, err := dumpMakeVars(ctx, config, goals, releaseConfigVars, false, "")
+		if err != nil {
+			ctx.Fatalln("Error getting PRODUCT_RELEASE_CONFIG_MAPS:", err)
+		}
+		config.productReleaseConfigMaps = releaseMapVars["PRODUCT_RELEASE_CONFIG_MAPS"]
+	}
 	cmd := Command(ctx, config, "dumpvars",
 		config.PrebuiltBuildTool("ckati"),
 		"-f", "build/make/core/config.mk",
@@ -191,6 +205,9 @@ func runMakeProductConfig(ctx Context, config Config) {
 		"TARGET_BUILD_APPS",
 		"TARGET_BUILD_UNBUNDLED",
 
+		// Additional release config maps
+		"PRODUCT_RELEASE_CONFIG_MAPS",
+
 		// compiler wrappers set up by make
 		"CC_WRAPPER",
 		"CXX_WRAPPER",