Split (ninja|soong).mk into config and rule portions

So that an external tool can read the configuration using
dump-many-vars, and write out the soong.variables file while only
loading config.mk.

Also remove dumpvar-% from PARSE_TIME_MAKE_GOALS, since it's only used
with CALLED_FROM_SETUP / config.mk. This provides an easy way to test
this change as well.

Test: get_build_var NINJA
Test: get_build_var ANDROID_GOALS
Test: get_build_var NINJA_GOALS
Test: get_build_var KATI_GOALS
Test: MAKECMDGOALS="droid sdk dumpvar-ANDROID_GOALS" get_build_var ANDROID_GOALS
Test: MAKECMDGOALS="droid sdk dumpvar-NINJA_GOALS" get_build_var NINJA_GOALS
Test: MAKECMDGOALS="droid sdk dumpvar-KATI_GOALS" get_build_var KATI_GOALS
Test: MAKECMDGOALS="out/build-a.ninja dumpvar-ANDROID_GOALS" get_build_var ANDROID_GOALS
Test: get_build_var SOONG_MAKEVARS_MK
Test: get_build_var SOONG_VARIABLES
Test: CALLED_FROM_SETUP=true BUILD_SYSTEM=build/core make -f build/core/config.mk out/soong/soong.variables showcommands
Test: Compare soong.variables from above, and before/after with `m`
Test: Compare out before/after with `m doesnotexist`
Test: `m dist doesnotexist`
Change-Id: I1bc291aa165297c930fe600067edad6ce4979210
diff --git a/core/soong_config.mk b/core/soong_config.mk
new file mode 100644
index 0000000..995d9ed
--- /dev/null
+++ b/core/soong_config.mk
@@ -0,0 +1,68 @@
+SOONG := $(SOONG_OUT_DIR)/soong
+SOONG_BOOTSTRAP := $(SOONG_OUT_DIR)/.soong.bootstrap
+SOONG_BUILD_NINJA := $(SOONG_OUT_DIR)/build.ninja
+SOONG_IN_MAKE := $(SOONG_OUT_DIR)/.soong.in_make
+SOONG_MAKEVARS_MK := $(SOONG_OUT_DIR)/make_vars-$(TARGET_PRODUCT).mk
+SOONG_VARIABLES := $(SOONG_OUT_DIR)/soong.variables
+SOONG_ANDROID_MK := $(SOONG_OUT_DIR)/Android-$(TARGET_PRODUCT).mk
+
+BINDER32BIT :=
+ifneq ($(TARGET_USES_64_BIT_BINDER),true)
+ifneq ($(TARGET_IS_64_BIT),true)
+BINDER32BIT := true
+endif
+endif
+
+# Create soong.variables with copies of makefile settings.  Runs every build,
+# but only updates soong.variables if it changes
+SOONG_VARIABLES_TMP := $(SOONG_VARIABLES).$$$$
+$(SOONG_VARIABLES): FORCE
+	$(hide) mkdir -p $(dir $@)
+	$(hide) (\
+	echo '{'; \
+	echo '    "Make_suffix": "-$(TARGET_PRODUCT)",'; \
+	echo ''; \
+	echo '    "Platform_sdk_version": $(PLATFORM_SDK_VERSION),'; \
+	echo '    "Unbundled_build": $(if $(TARGET_BUILD_APPS),true,false),'; \
+	echo '    "Brillo": $(if $(BRILLO),true,false),'; \
+	echo '    "Malloc_not_svelte": $(if $(filter true,$(MALLOC_SVELTE)),false,true),'; \
+	echo '    "Allow_missing_dependencies": $(if $(TARGET_BUILD_APPS)$(filter true,$(SOONG_ALLOW_MISSING_DEPENDENCIES)),true,false),'; \
+	echo '    "SanitizeHost": [$(if $(SANITIZE_HOST),"$(subst $(space),"$(comma)",$(SANITIZE_HOST))")],'; \
+	echo '    "SanitizeDevice": [$(if $(SANITIZE_TARGET),"$(subst $(space),"$(comma)",$(SANITIZE_TARGET))")],'; \
+	echo '    "SanitizeDeviceArch": [$(if $(SANITIZE_TARGET_ARCH),"$(subst $(space),"$(comma)",$(SANITIZE_TARGET_ARCH))")],'; \
+	echo '    "HostStaticBinaries": $(if $(strip $(BUILD_HOST_static)),true,false),'; \
+	echo '    "Cpusets": $(if $(strip $(ENABLE_CPUSETS)),true,false),'; \
+	echo '    "Schedboost": $(if $(strip $(ENABLE_SCHEDBOOST)),true,false),'; \
+	echo '    "Binder32bit": $(if $(BINDER32BIT),true,false),'; \
+	echo '    "DevicePrefer32BitExecutables": $(if $(filter true,$(TARGET_PREFER_32_BIT_EXECUTABLES)),true,false),'; \
+	echo '    "UseGoma": $(if $(filter-out false,$(USE_GOMA)),true,false),'; \
+	echo '    "Debuggable": $(if $(filter userdebug eng,$(TARGET_BUILD_VARIANT)),true,false),'; \
+	echo ''; \
+	echo '    "ClangTidy": $(if $(filter 1 true,$(WITH_TIDY)),true,false),'; \
+	echo '    "TidyChecks": "$(WITH_TIDY_CHECKS)",'; \
+	echo ''; \
+	echo '    "DeviceName": "$(TARGET_DEVICE)",'; \
+	echo '    "DeviceArch": "$(TARGET_ARCH)",'; \
+	echo '    "DeviceArchVariant": "$(TARGET_ARCH_VARIANT)",'; \
+	echo '    "DeviceCpuVariant": "$(TARGET_CPU_VARIANT)",'; \
+	echo '    "DeviceAbi": ["$(TARGET_CPU_ABI)", "$(TARGET_CPU_ABI2)"],'; \
+	echo '    "DeviceUsesClang": $(if $(USE_CLANG_PLATFORM_BUILD),$(USE_CLANG_PLATFORM_BUILD),false),'; \
+	echo ''; \
+	echo '    "DeviceSecondaryArch": "$(TARGET_2ND_ARCH)",'; \
+	echo '    "DeviceSecondaryArchVariant": "$(TARGET_2ND_ARCH_VARIANT)",'; \
+	echo '    "DeviceSecondaryCpuVariant": "$(TARGET_2ND_CPU_VARIANT)",'; \
+	echo '    "DeviceSecondaryAbi": ["$(TARGET_2ND_CPU_ABI)", "$(TARGET_2ND_CPU_ABI2)"],'; \
+	echo ''; \
+	echo '    "HostArch": "$(HOST_ARCH)",'; \
+	echo '    "HostSecondaryArch": "$(HOST_2ND_ARCH)",'; \
+	echo ''; \
+	echo '    "CrossHost": "$(HOST_CROSS_OS)",'; \
+	echo '    "CrossHostArch": "$(HOST_CROSS_ARCH)",'; \
+	echo '    "CrossHostSecondaryArch": "$(HOST_CROSS_2ND_ARCH)",'; \
+	echo '    "Safestack": $(if $(filter true,$(USE_SAFESTACK)),true,false)'; \
+	echo '}') > $(SOONG_VARIABLES_TMP); \
+	if ! cmp -s $(SOONG_VARIABLES_TMP) $(SOONG_VARIABLES); then \
+	  mv $(SOONG_VARIABLES_TMP) $(SOONG_VARIABLES); \
+	else \
+	  rm $(SOONG_VARIABLES_TMP); \
+	fi