8177ad2932
It is safe to use GlobWithDeps in MakeVarsContext, the globSingleton is registered in boostrap.Main, which runs after all the Soong singletons (including makeVarsSingleton) are registered. Bug: 143324390 Test: m checkbuild Change-Id: I2edf915c666bd5db535c761bb645a48c4f573a65
321 lines
9.1 KiB
Go
321 lines
9.1 KiB
Go
// Copyright 2016 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package android
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"strconv"
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"strings"
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"github.com/google/blueprint"
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"github.com/google/blueprint/pathtools"
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"github.com/google/blueprint/proptools"
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)
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func init() {
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RegisterMakeVarsProvider(pctx, androidMakeVarsProvider)
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}
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func androidMakeVarsProvider(ctx MakeVarsContext) {
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ctx.Strict("MIN_SUPPORTED_SDK_VERSION", strconv.Itoa(ctx.Config().MinSupportedSdkVersion()))
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}
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///////////////////////////////////////////////////////////////////////////////
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// Interface for other packages to use to declare make variables
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type MakeVarsContext interface {
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Config() Config
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DeviceConfig() DeviceConfig
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AddNinjaFileDeps(deps ...string)
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Fs() pathtools.FileSystem
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ModuleName(module blueprint.Module) string
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ModuleDir(module blueprint.Module) string
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ModuleSubDir(module blueprint.Module) string
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ModuleType(module blueprint.Module) string
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BlueprintFile(module blueprint.Module) string
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ModuleErrorf(module blueprint.Module, format string, args ...interface{})
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Errorf(format string, args ...interface{})
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Failed() bool
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VisitAllModules(visit func(Module))
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VisitAllModulesIf(pred func(Module) bool, visit func(Module))
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// Verify the make variable matches the Soong version, fail the build
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// if it does not. If the make variable is empty, just set it.
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Strict(name, ninjaStr string)
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// Check to see if the make variable matches the Soong version, warn if
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// it does not. If the make variable is empty, just set it.
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Check(name, ninjaStr string)
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// These are equivalent to the above, but sort the make and soong
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// variables before comparing them. They also show the unique entries
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// in each list when displaying the difference, instead of the entire
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// string.
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StrictSorted(name, ninjaStr string)
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CheckSorted(name, ninjaStr string)
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// Evaluates a ninja string and returns the result. Used if more
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// complicated modification needs to happen before giving it to Make.
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Eval(ninjaStr string) (string, error)
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// These are equivalent to Strict and Check, but do not attempt to
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// evaluate the values before writing them to the Makefile. They can
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// be used when all ninja variables have already been evaluated through
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// Eval().
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StrictRaw(name, value string)
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CheckRaw(name, value string)
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// GlobWithDeps returns a list of files that match the specified pattern but do not match any
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// of the patterns in excludes. It also adds efficient dependencies to rerun the primary
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// builder whenever a file matching the pattern as added or removed, without rerunning if a
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// file that does not match the pattern is added to a searched directory.
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GlobWithDeps(pattern string, excludes []string) ([]string, error)
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}
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var _ PathContext = MakeVarsContext(nil)
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type MakeVarsProvider func(ctx MakeVarsContext)
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func RegisterMakeVarsProvider(pctx PackageContext, provider MakeVarsProvider) {
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makeVarsProviders = append(makeVarsProviders, makeVarsProvider{pctx, provider})
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}
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// SingletonMakeVarsProvider is a Singleton with an extra method to provide extra values to be exported to Make.
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type SingletonMakeVarsProvider interface {
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Singleton
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// MakeVars uses a MakeVarsContext to provide extra values to be exported to Make.
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MakeVars(ctx MakeVarsContext)
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}
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// registerSingletonMakeVarsProvider adds a singleton that implements SingletonMakeVarsProvider to the list of
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// MakeVarsProviders to run.
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func registerSingletonMakeVarsProvider(singleton SingletonMakeVarsProvider) {
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makeVarsProviders = append(makeVarsProviders, makeVarsProvider{pctx, SingletonmakeVarsProviderAdapter(singleton)})
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}
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// SingletonmakeVarsProviderAdapter converts a SingletonMakeVarsProvider to a MakeVarsProvider.
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func SingletonmakeVarsProviderAdapter(singleton SingletonMakeVarsProvider) MakeVarsProvider {
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return func(ctx MakeVarsContext) { singleton.MakeVars(ctx) }
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}
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///////////////////////////////////////////////////////////////////////////////
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func makeVarsSingletonFunc() Singleton {
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return &makeVarsSingleton{}
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}
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type makeVarsSingleton struct{}
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type makeVarsProvider struct {
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pctx PackageContext
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call MakeVarsProvider
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}
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var makeVarsProviders []makeVarsProvider
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type makeVarsContext struct {
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SingletonContext
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config Config
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pctx PackageContext
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vars []makeVarsVariable
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}
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var _ MakeVarsContext = &makeVarsContext{}
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type makeVarsVariable struct {
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name string
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value string
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sort bool
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strict bool
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}
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func (s *makeVarsSingleton) GenerateBuildActions(ctx SingletonContext) {
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if !ctx.Config().EmbeddedInMake() {
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return
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}
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outFile := PathForOutput(ctx, "make_vars"+proptools.String(ctx.Config().productVariables.Make_suffix)+".mk").String()
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if ctx.Failed() {
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return
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}
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vars := []makeVarsVariable{}
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for _, provider := range makeVarsProviders {
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mctx := &makeVarsContext{
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SingletonContext: ctx,
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pctx: provider.pctx,
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}
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provider.call(mctx)
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vars = append(vars, mctx.vars...)
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}
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if ctx.Failed() {
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return
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}
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outBytes := s.writeVars(vars)
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if _, err := os.Stat(outFile); err == nil {
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if data, err := ioutil.ReadFile(outFile); err == nil {
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if bytes.Equal(data, outBytes) {
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return
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}
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}
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}
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if err := ioutil.WriteFile(outFile, outBytes, 0666); err != nil {
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ctx.Errorf(err.Error())
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}
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}
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func (s *makeVarsSingleton) writeVars(vars []makeVarsVariable) []byte {
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buf := &bytes.Buffer{}
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fmt.Fprint(buf, `# Autogenerated file
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# Compares SOONG_$(1) against $(1), and warns if they are not equal.
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#
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# If the original variable is empty, then just set it to the SOONG_ version.
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#
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# $(1): Name of the variable to check
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# $(2): If not-empty, sort the values before comparing
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# $(3): Extra snippet to run if it does not match
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define soong-compare-var
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ifneq ($$($(1)),)
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my_val_make := $$(strip $(if $(2),$$(sort $$($(1))),$$($(1))))
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my_val_soong := $(if $(2),$$(sort $$(SOONG_$(1))),$$(SOONG_$(1)))
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ifneq ($$(my_val_make),$$(my_val_soong))
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$$(warning $(1) does not match between Make and Soong:)
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$(if $(2),$$(warning Make adds: $$(filter-out $$(my_val_soong),$$(my_val_make))),$$(warning Make : $$(my_val_make)))
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$(if $(2),$$(warning Soong adds: $$(filter-out $$(my_val_make),$$(my_val_soong))),$$(warning Soong: $$(my_val_soong)))
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$(3)
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endif
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my_val_make :=
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my_val_soong :=
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else
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$(1) := $$(SOONG_$(1))
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endif
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.KATI_READONLY := $(1) SOONG_$(1)
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endef
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my_check_failed := false
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`)
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// Write all the strict checks out first so that if one of them errors,
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// we get all of the strict errors printed, but not the non-strict
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// warnings.
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for _, v := range vars {
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if !v.strict {
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continue
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}
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sort := ""
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if v.sort {
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sort = "true"
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}
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fmt.Fprintf(buf, "SOONG_%s := %s\n", v.name, v.value)
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fmt.Fprintf(buf, "$(eval $(call soong-compare-var,%s,%s,my_check_failed := true))\n\n", v.name, sort)
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}
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fmt.Fprint(buf, `
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ifneq ($(my_check_failed),false)
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$(error Soong variable check failed)
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endif
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my_check_failed :=
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`)
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for _, v := range vars {
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if v.strict {
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continue
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}
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sort := ""
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if v.sort {
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sort = "true"
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}
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fmt.Fprintf(buf, "SOONG_%s := %s\n", v.name, v.value)
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fmt.Fprintf(buf, "$(eval $(call soong-compare-var,%s,%s))\n\n", v.name, sort)
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}
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fmt.Fprintln(buf, "\nsoong-compare-var :=")
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return buf.Bytes()
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}
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func (c *makeVarsContext) DeviceConfig() DeviceConfig {
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return DeviceConfig{c.Config().deviceConfig}
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}
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var ninjaDescaper = strings.NewReplacer("$$", "$")
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func (c *makeVarsContext) Eval(ninjaStr string) (string, error) {
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s, err := c.SingletonContext.Eval(c.pctx, ninjaStr)
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if err != nil {
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return "", err
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}
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// SingletonContext.Eval returns an exapnded string that is valid for a ninja file, de-escape $$ to $ for use
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// in a Makefile
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return ninjaDescaper.Replace(s), nil
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}
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func (c *makeVarsContext) addVariableRaw(name, value string, strict, sort bool) {
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c.vars = append(c.vars, makeVarsVariable{
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name: name,
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value: value,
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strict: strict,
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sort: sort,
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})
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}
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func (c *makeVarsContext) addVariable(name, ninjaStr string, strict, sort bool) {
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value, err := c.Eval(ninjaStr)
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if err != nil {
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c.SingletonContext.Errorf(err.Error())
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}
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c.addVariableRaw(name, value, strict, sort)
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}
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func (c *makeVarsContext) Strict(name, ninjaStr string) {
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c.addVariable(name, ninjaStr, true, false)
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}
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func (c *makeVarsContext) StrictSorted(name, ninjaStr string) {
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c.addVariable(name, ninjaStr, true, true)
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}
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func (c *makeVarsContext) StrictRaw(name, value string) {
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c.addVariableRaw(name, value, true, false)
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}
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func (c *makeVarsContext) Check(name, ninjaStr string) {
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c.addVariable(name, ninjaStr, false, false)
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}
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func (c *makeVarsContext) CheckSorted(name, ninjaStr string) {
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c.addVariable(name, ninjaStr, false, true)
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}
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func (c *makeVarsContext) CheckRaw(name, value string) {
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c.addVariableRaw(name, value, false, false)
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}
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