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Joe Onorato964f4012023-05-06 12:29:01 -07001# Copyright (C) 2023 The Android Open Source Project
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7# http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14
Joe Onoratod6df20a2023-06-09 18:51:00 -070015
16# -----------------------------------------------------------------
17# Choose the flag files
18# -----------------------------------------------------------------
Joe Onorato1f655512023-06-12 23:29:25 -070019# Release configs are defined in reflease_config_map files, which map
20# the short name (e.g. -next) used in lunch to the starlark files
21# defining the build flag values.
22#
23# (If you're thinking about aconfig flags, there is one build flag,
Joe Onorato6aa48f82023-06-21 15:17:42 -070024# RELEASE_ACONFIG_VALUE_SETS, that sets which aconfig_value_set
Joe Onorato1f655512023-06-12 23:29:25 -070025# module to use to set the aconfig flag values.)
26#
27# The short release config names *can* appear multiple times, to allow
28# for AOSP and vendor specific flags under the same name, but the
29# individual flag values must appear in exactly one config. Vendor
30# does not override AOSP, or anything like that. This is because
31# vendor code usually includes prebuilts, and having vendor compile
32# with different flags from AOSP increases the likelihood of flag
33# mismatch.
34
Joe Onoratod6df20a2023-06-09 18:51:00 -070035# Do this first, because we're going to unset TARGET_RELEASE before
36# including anyone, so they don't start making conditionals based on it.
37# This logic is in make because starlark doesn't understand optional
38# vendor files.
39
40# If this is a google source tree, restrict it to only the one file
41# which has OWNERS control. If it isn't let others define their own.
42# TODO: Remove wildcard for build/release one when all branch manifests
43# have updated.
44config_map_files := $(wildcard build/release/release_config_map.mk) \
45 $(if $(wildcard vendor/google/release/release_config_map.mk), \
46 vendor/google/release/release_config_map.mk, \
47 $(sort \
48 $(wildcard device/*/release/release_config_map.mk) \
49 $(wildcard device/*/*/release/release_config_map.mk) \
50 $(wildcard vendor/*/release/release_config_map.mk) \
51 $(wildcard vendor/*/*/release/release_config_map.mk) \
52 ) \
53 )
54
55# $1 config name
56# $2 release config files
57define declare-release-config
Joe Onoratod6df20a2023-06-09 18:51:00 -070058 $(if $(strip $(2)),, \
59 $(error declare-release-config: config $(strip $(1)) must have release config files) \
60 )
61 $(eval _all_release_configs := $(sort $(_all_release_configs) $(strip $(1))))
Joe Onorato1f655512023-06-12 23:29:25 -070062 $(eval _all_release_configs.$(strip $(1)).DECLARED_IN := $(_included) $(_all_release_configs.$(strip $(1)).DECLARED_IN))
63 $(eval _all_release_configs.$(strip $(1)).FILES := $(_all_release_configs.$(strip $(1)).FILES) $(strip $(2)))
Joe Onoratod6df20a2023-06-09 18:51:00 -070064endef
65
66# Include the config map files
67$(foreach f, $(config_map_files), \
68 $(eval _included := $(f)) \
69 $(eval include $(f)) \
70)
71
72# If TARGET_RELEASE is set, fail if there is no matching release config
73# If it isn't set, no release config files will be included and all flags
74# will get their default values.
75ifneq ($(TARGET_RELEASE),)
76ifeq ($(filter $(_all_release_configs), $(TARGET_RELEASE)),)
77 $(error No release config found for TARGET_RELEASE: $(TARGET_RELEASE). Available releases are: $(_all_release_configs))
78else
79 # Choose flag files
80 # Don't sort this, use it in the order they gave us.
81 flag_value_files := $(_all_release_configs.$(TARGET_RELEASE).FILES)
82endif
83else
84# Useful for finding scripts etc that aren't passing or setting TARGET_RELEASE
85ifneq ($(FAIL_IF_NO_RELEASE_CONFIG),)
86 $(error FAIL_IF_NO_RELEASE_CONFIG was set and TARGET_RELEASE was not)
87endif
88flag_value_files :=
89endif
90
91# Unset variables so they can't use them
92define declare-release-config
93$(error declare-release-config can only be called from inside release_config_map.mk files)
94endef
95
96# TODO: Remove this check after enough people have sourced lunch that we don't
97# need to worry about it trying to do get_build_vars TARGET_RELEASE. Maybe after ~9/2023
98ifneq ($(CALLED_FROM_SETUP),true)
99define TARGET_RELEASE
100$(error TARGET_RELEASE may not be accessed directly. Use individual flags.)
101endef
102else
103TARGET_RELEASE:=
104endif
105.KATI_READONLY := TARGET_RELEASE
106
107
108$(foreach config, $(_all_release_configs), \
109 $(eval _all_release_configs.$(config).DECLARED_IN:= ) \
110 $(eval _all_release_configs.$(config).FILES:= ) \
111)
112_all_release_configs:=
113config_map_files:=
114
115
116# -----------------------------------------------------------------
117# Flag declarations and values
118# -----------------------------------------------------------------
119# This part is in starlark. We generate a root starlark file that loads
120# all of the flags declaration files that we found, and the flag_value_files
121# that we chose from the config map above. Then we run that, and load the
122# results of that into the make environment.
123
Joe Onorato964f4012023-05-06 12:29:01 -0700124# If this is a google source tree, restrict it to only the one file
125# which has OWNERS control. If it isn't let others define their own.
Joe Onorato0d1a9812023-05-07 13:40:25 -0700126# TODO: Remove wildcard for build/release one when all branch manifests
127# have updated.
Cole Faust386b3742023-06-06 16:55:58 -0700128flag_declaration_files := $(wildcard build/release/build_flags.bzl) \
129 $(if $(wildcard vendor/google/release/build_flags.bzl), \
130 vendor/google/release/build_flags.bzl, \
Joe Onorato964f4012023-05-06 12:29:01 -0700131 $(sort \
Cole Faust386b3742023-06-06 16:55:58 -0700132 $(wildcard device/*/release/build_flags.bzl) \
133 $(wildcard device/*/*/release/build_flags.bzl) \
134 $(wildcard vendor/*/release/build_flags.bzl) \
135 $(wildcard vendor/*/*/release/build_flags.bzl) \
136 ) \
137 )
Joe Onoratod6df20a2023-06-09 18:51:00 -0700138
Joe Onorato964f4012023-05-06 12:29:01 -0700139
Cole Faust386b3742023-06-06 16:55:58 -0700140# Because starlark can't find files with $(wildcard), write an entrypoint starlark script that
141# contains the result of the above wildcards for the starlark code to use.
142filename_to_starlark=$(subst /,_,$(subst .,_,$(1)))
143_c:=load("//build/make/core/release_config.bzl", "release_config")
Joe Onoratod6df20a2023-06-09 18:51:00 -0700144_c+=$(newline)def add(d, k, v):
145_c+=$(newline)$(space)d = dict(d)
146_c+=$(newline)$(space)d[k] = v
147_c+=$(newline)$(space)return d
148_c+=$(foreach f,$(flag_declaration_files),$(newline)load("$(f)", flags_$(call filename_to_starlark,$(f)) = "flags"))
149_c+=$(newline)all_flags = [] $(foreach f,$(flag_declaration_files),+ [add(x, "declared_in", "$(f)") for x in flags_$(call filename_to_starlark,$(f))])
150_c+=$(foreach f,$(flag_value_files),$(newline)load("//$(f)", values_$(call filename_to_starlark,$(f)) = "values"))
151_c+=$(newline)all_values = [] $(foreach f,$(flag_value_files),+ [add(x, "set_in", "$(f)") for x in values_$(call filename_to_starlark,$(f))])
152_c+=$(newline)variables_to_export_to_make = release_config(all_flags, all_values)
Cole Faust386b3742023-06-06 16:55:58 -0700153$(file >$(OUT_DIR)/release_config_entrypoint.bzl,$(_c))
154_c:=
155filename_to_starlark:=
Joe Onorato964f4012023-05-06 12:29:01 -0700156
Cole Faust386b3742023-06-06 16:55:58 -0700157# Exclude the entrypoint file as a dependency (by passing it as the 2nd argument) so that we don't
158# rerun kati every build. Kati will replay the $(file) command that generates it every build,
159# updating its timestamp.
160#
161# We also need to pass --allow_external_entrypoint to rbcrun in case the OUT_DIR is set to something
162# outside of the source tree.
163$(call run-starlark,$(OUT_DIR)/release_config_entrypoint.bzl,$(OUT_DIR)/release_config_entrypoint.bzl,--allow_external_entrypoint)
Joe Onorato7b578d32023-05-19 09:13:36 -0700164