Make starlark board configuration work with sdk_phone_x86_64

The main issue with board configuration up till this
cl was that it didn't have access to the product configuration
variables. Pass those in by dumping the make variables to a
temporary file, which is then converted to RBC, loaded,
and passed to the starlark board config..

Bug: 201700692
Test: build/bazel/ci/rbc_product_config.sh -pb sdk_phone_x86_64-userdebug
Change-Id: I9a4946b970ca43c5b5f53a6c507ad2c1a2eca61e

core/board_config.mk

@@ -185,19 +185,44 @@ else
   .KATI_READONLY := TARGET_DEVICE_DIR
 endif
 
+# Dumps all variables that match [A-Z][A-Z0-9_]* to the file at $(1)
+# It is used to print only the variables that are likely to be relevant to the
+# board configuration.
+define dump-public-variables
+$(file >$(OUT_DIR)/dump-public-variables-temp.txt,$(subst $(space),$(newline),$(.VARIABLES)))\
+$(file >$(1),\
+$(foreach v, $(shell grep -he "^[A-Z][A-Z0-9_]*$$" $(OUT_DIR)/dump-public-variables-temp.txt | grep -vhe "^SOONG_"),\
+$(v) := $(strip $($(v)))$(newline)))
+endef
+
 # TODO(colefaust) change this if to RBC_PRODUCT_CONFIG when
 # the board configuration is known to work on everything
 # the product config works on.
 ifndef RBC_BOARD_CONFIG
 include $(board_config_mk)
 else
-  rc := $(shell build/soong/scripts/rbc-run $(board_config_mk) \
+  $(shell mkdir -p $(OUT_DIR)/rbc)
-      BUILDING_GSI=$(BUILDING_GSI) >$(OUT_DIR)/rbcboardtemp.mk || echo $$?)
+
-  ifneq (,$(rc))
+  $(call dump-public-variables, $(OUT_DIR)/rbc/make_vars_pre_board_config.mk)
-    $(error board configuration converter failed: $(rc))
+
+  $(shell $(OUT_DIR)/soong/mk2rbc \
+    --mode=write -r --outdir $(OUT_DIR)/rbc \
+    --boardlauncher=$(OUT_DIR)/rbc/boardlauncher.rbc \
+    --input_variables=$(OUT_DIR)/rbc/make_vars_pre_board_config.mk \
+    $(board_config_mk))
+  ifneq ($(.SHELLSTATUS),0)
+    $(error board configuration converter failed: $(.SHELLSTATUS))
   endif
 
-  include $(OUT_DIR)/rbcboardtemp.mk
+  $(shell $(OUT_DIR)/soong/rbcrun \
+    RBC_OUT="make,global" \
+    $(OUT_DIR)/rbc/boardlauncher.rbc \
+    >$(OUT_DIR)/rbc/rbc_board_config_results.mk)
+  ifneq ($(.SHELLSTATUS),0)
+    $(error board configuration runner failed: $(.SHELLSTATUS))
+  endif
+
+  include $(OUT_DIR)/rbc/rbc_board_config_results.mk
 endif
 
 ifneq (,$(and $(TARGET_ARCH),$(TARGET_ARCH_SUITE)))

core/main.mk

@@ -1379,7 +1379,7 @@ else ifdef FULL_BUILD
 
   # Verify the artifact path requirements made by included products.
   is_asan := $(if $(filter address,$(SANITIZE_TARGET)),true)
-  ifeq (,$(or $(is_asan),$(DISABLE_ARTIFACT_PATH_REQUIREMENTS),$(RBC_PRODUCT_CONFIG)))
+  ifeq (,$(or $(is_asan),$(DISABLE_ARTIFACT_PATH_REQUIREMENTS),$(RBC_PRODUCT_CONFIG),$(RBC_BOARD_CONFIG)))
     include $(BUILD_SYSTEM)/artifact_path_requirements.mk
   endif
 else

core/product-graph.mk

@@ -81,7 +81,7 @@ $(products_graph): PRIVATE_PRODUCTS := $(all_products)
 $(products_graph): PRIVATE_PRODUCTS_FILTER := $(products_list)
 
 $(products_graph): $(this_makefile)
-ifeq (,$(RBC_PRODUCT_CONFIG)$(RBC_NO_PRODUCT_GRAPH))
+ifeq (,$(RBC_PRODUCT_CONFIG)$(RBC_NO_PRODUCT_GRAPH)$(RBC_BOARD_CONFIG))
 	@echo Product graph DOT: $@ for $(PRIVATE_PRODUCTS_FILTER)
 	$(hide) echo 'digraph {' > $@.in
 	$(hide) echo 'graph [ ratio=.5 ];' >> $@.in
@@ -148,7 +148,7 @@ $(call product-debug-filename, $(p)): \
 	$(hide) cat $$< | build/make/tools/product_debug.py > $$@
 endef
 
-ifeq (,$(RBC_PRODUCT_CONFIG)$(RBC_NO_PRODUCT_GRAPH))
+ifeq (,$(RBC_PRODUCT_CONFIG)$(RBC_NO_PRODUCT_GRAPH)$(RBC_BOARD_CONFIG))
 product_debug_files:=
 $(foreach p,$(all_products), \
 			$(eval $(call transform-product-debug, $(p))) \

core/product_config.mk

@@ -206,10 +206,10 @@ endif
 ifndef RBC_PRODUCT_CONFIG
 $(call import-products, $(current_product_makefile))
 else
-  rc := $(shell build/soong/scripts/rbc-run $(current_product_makefile) \
+  $(shell build/soong/scripts/rbc-run $(current_product_makefile) \
-      >$(OUT_DIR)/rbctemp.mk || echo $$?)
+      >$(OUT_DIR)/rbctemp.mk)
-  ifneq (,$(rc))
+  ifneq ($(.SHELLSTATUS),0)
-    $(error product configuration converter failed: $(rc))
+    $(error product configuration converter failed: $(.SHELLSTATUS))
   endif
   include $(OUT_DIR)/rbctemp.mk
   PRODUCTS += $(current_product_makefile)

core/product_config.rbc

@@ -17,7 +17,7 @@ load("//build/make/core:envsetup.rbc", _envsetup_init = "init")
 """Runtime functions."""
 
 _soong_config_namespaces_key = "$SOONG_CONFIG_NAMESPACES"
-def _global_init(version_info):
+def _init_globals(version_info):
     """Returns dict created from the runtime environment."""
     globals = dict()
 
@@ -50,7 +50,8 @@ def _global_init(version_info):
 
 
 def __print_attr(attr, value):
-    if not value:
+    # Allow using empty strings to clear variables, but not None values
+    if value == None:
         return
     if type(value) == "list":
         if _options.rearrange:
@@ -74,6 +75,9 @@ def _printvars(state):
         __print_attr(attr, val)
     if _options.print_globals:
         print()
+        _printglobals(globals, globals_base)
+
+def _printglobals(globals, globals_base):
     for attr, val in sorted(globals.items()):
         if attr == _soong_config_namespaces_key:
             __print_attr("SOONG_CONFIG_NAMESPACES", val.keys())
@@ -109,7 +113,7 @@ def _product_configuration(top_pcm_name, top_pcm, version_info):
     # PCM means "Product Configuration Module", i.e., a Starlark file
     # whose body consists of a single init function.
 
-    globals_base = _global_init(version_info)
+    globals_base = _init_globals(version_info)
     globals = dict(**globals_base)
 
     config_postfix = []  # Configs in postfix order
@@ -203,6 +207,16 @@ def _product_configuration(top_pcm_name, top_pcm, version_info):
 
     return (globals, configs[top_pcm_name][1], globals_base)
 
+
+def _board_configuration(board_config_init, input_variables_init):
+    globals = {}
+    h = __h_new()
+    input_variables_init(globals, h)
+    globals_base = dict(**globals)
+    board_config_init(globals, h)
+    return (globals, h[1], globals_base)
+
+
 def _substitute_inherited(configs, pcm_name, cfg):
     """Substitutes inherited values in all the attributes.
 
@@ -645,7 +659,7 @@ rblf = struct(
     filter = _filter,
     filter_out = _filter_out,
     find_and_copy = _find_and_copy,
-    global_init = _global_init,
+    init_globals = _init_globals,
     inherit = _inherit,
     indirect = _indirect,
     mkinfo = _mkinfo,
@@ -655,7 +669,9 @@ rblf = struct(
     mkstrip = _mkstrip,
     mksubst = _mksubst,
     printvars = _printvars,
+    printglobals = _printglobals,
     product_configuration = _product_configuration,
+    board_configuration = _board_configuration,
     product_copy_files_by_pattern = _product_copy_files_by_pattern,
     require_artifacts_in_path = _require_artifacts_in_path,
     require_artifacts_in_path_relaxed = _require_artifacts_in_path_relaxed,