Support to build pdk and pdk fusion.
Bug: 6241618
Change-Id: I08f74019631e9e132c15cdb2916bbafb052f9aa6
diff --git a/core/pdk_config.mk b/core/pdk_config.mk
new file mode 100644
index 0000000..98f34a5
--- /dev/null
+++ b/core/pdk_config.mk
@@ -0,0 +1,66 @@
+# This file defines the rule to fuse the platform.zip into the current PDK build.
+
+.PHONY: pdk fusion
+pdk fusion: $(DEFAULT_GOAL)
+
+# What to build:
+# pdk fusion if:
+# 1) the platform.zip exists in the default location
+# or
+# 2) PDK_FUSION_PLATFORM_ZIP is passed in from the environment
+# or
+# 3) fusion is a command line build goal,
+# PDK_FUSION_PLATFORM_ZIP is needed anyway, then do we need the 'fusion' goal?
+# otherwise pdk only if:
+# 1) pdk is a command line build goal
+# or
+# 2) TARGET_BUILD_PDK is passed in from the environment
+
+# TODO: what's the best default location?
+_pdk_fusion_default_platform_zip := $(OUT_DIR)/platform.zip
+ifneq (,$(wildcard $(_pdk_fusion_default_platform_zip)))
+$(info $(_pdk_fusion_default_platform_zip) found, do a PDK fusion build.)
+PDK_FUSION_PLATFORM_ZIP := $(_pdk_fusion_default_platform_zip)
+TARGET_BUILD_PDK := true
+endif
+
+ifneq (,$(filter pdk fusion, $(MAKECMDGOALS)))
+TARGET_BUILD_PDK := true
+ifneq (,$(filter fusion, $(MAKECMDGOALS)))
+ifndef PDK_FUSION_PLATFORM_ZIP
+ $(error Specify PDK_FUSION_PLATFORM_ZIP to do a PDK fusion.)
+endif
+endif # fusion
+endif # pdk or fusion
+
+ifdef PDK_FUSION_PLATFORM_ZIP
+TARGET_BUILD_PDK := true
+ifeq (,$(wildcard $(PDK_FUSION_PLATFORM_ZIP)))
+ $(error Cannot find file $(PDK_FUSION_PLATFORM_ZIP).)
+endif
+
+_pdk_fusion_intermediates := $(call intermediates-dir-for, PACKAGING, pdk_fusion)
+_pdk_fusion_stamp := $(_pdk_fusion_intermediates)/pdk_fusion.stamp
+
+$(_pdk_fusion_stamp) : $(PDK_FUSION_PLATFORM_ZIP)
+ @echo "Unzip $(dir $@) <- $<"
+ $(hide) rm -rf $(dir $@) && mkdir -p $(dir $@)
+ $(hide) unzip -qo $< -d $(dir $@)
+ $(hide) touch $@
+
+_pdk_fusion_file_list := $(shell unzip -Z -1 $(PDK_FUSION_PLATFORM_ZIP) '*[^/]' 2>/dev/null)
+_pdk_fusion_files := $(addprefix $(_pdk_fusion_intermediates)/, $(_pdk_fusion_file_list))
+$(_pdk_fusion_files) : $(_pdk_fusion_stamp)
+
+# Implicit pattern rules to copy the fusion files to the system image directory.
+# Note that if there is already explicit rule in the build system to generate a file,
+# the pattern rule will be just ignored by make.
+# That's desired by us: we want only absent files from the platform zip package.
+# Copy with the last-modified time preserved, never follow symbolic links.
+$(PRODUCT_OUT)/% : $(_pdk_fusion_intermediates)/%
+ @mkdir -p $(dir $@)
+ $(hide) cp -fpPR $< $@
+
+ALL_PDK_FUSION_FILES := $(addprefix $(PRODUCT_OUT)/, $(_pdk_fusion_file_list))
+
+endif