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makevars.go
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makevars.go
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// Copyright 2016 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package android
import (
"bytes"
"fmt"
"path/filepath"
"runtime"
"sort"
"strings"
"github.com/google/blueprint"
"github.com/google/blueprint/pathtools"
"github.com/google/blueprint/proptools"
)
func init() {
RegisterMakeVarsProvider(pctx, androidMakeVarsProvider)
}
func androidMakeVarsProvider(ctx MakeVarsContext) {
ctx.Strict("MIN_SUPPORTED_SDK_VERSION", ctx.Config().MinSupportedSdkVersion().String())
}
// /////////////////////////////////////////////////////////////////////////////
// BaseMakeVarsContext contains the common functions for other packages to use
// to declare make variables
type BaseMakeVarsContext interface {
Config() Config
DeviceConfig() DeviceConfig
AddNinjaFileDeps(deps ...string)
Failed() bool
// These are equivalent to Strict and Check, but do not attempt to
// evaluate the values before writing them to the Makefile. They can
// be used when all ninja variables have already been evaluated through
// Eval().
StrictRaw(name, value string)
CheckRaw(name, value string)
// GlobWithDeps returns a list of files that match the specified pattern but do not match any
// of the patterns in excludes. It also adds efficient dependencies to rerun the primary
// builder whenever a file matching the pattern as added or removed, without rerunning if a
// file that does not match the pattern is added to a searched directory.
GlobWithDeps(pattern string, excludes []string) ([]string, error)
// Phony creates a phony rule in Make, which will allow additional DistForGoal
// dependencies to be added to it. Phony can be called on the same name multiple
// times to add additional dependencies.
Phony(names string, deps ...Path)
// DistForGoal creates a rule to copy one or more Paths to the artifacts
// directory on the build server when the specified goal is built.
DistForGoal(goal string, paths ...Path)
// DistForGoalWithFilename creates a rule to copy a Path to the artifacts
// directory on the build server with the given filename when the specified
// goal is built.
DistForGoalWithFilename(goal string, path Path, filename string)
// DistForGoals creates a rule to copy one or more Paths to the artifacts
// directory on the build server when any of the specified goals are built.
DistForGoals(goals []string, paths ...Path)
// DistForGoalsWithFilename creates a rule to copy a Path to the artifacts
// directory on the build server with the given filename when any of the
// specified goals are built.
DistForGoalsWithFilename(goals []string, path Path, filename string)
}
// MakeVarsContext contains the set of functions available for MakeVarsProvider
// and SingletonMakeVarsProvider implementations.
type MakeVarsContext interface {
BaseMakeVarsContext
ModuleName(module blueprint.Module) string
ModuleDir(module blueprint.Module) string
ModuleSubDir(module blueprint.Module) string
ModuleType(module blueprint.Module) string
ModuleProvider(module blueprint.Module, key blueprint.ProviderKey) interface{}
BlueprintFile(module blueprint.Module) string
ModuleErrorf(module blueprint.Module, format string, args ...interface{})
Errorf(format string, args ...interface{})
VisitAllModules(visit func(Module))
VisitAllModulesIf(pred func(Module) bool, visit func(Module))
// Verify the make variable matches the Soong version, fail the build
// if it does not. If the make variable is empty, just set it.
Strict(name, ninjaStr string)
// Check to see if the make variable matches the Soong version, warn if
// it does not. If the make variable is empty, just set it.
Check(name, ninjaStr string)
// These are equivalent to the above, but sort the make and soong
// variables before comparing them. They also show the unique entries
// in each list when displaying the difference, instead of the entire
// string.
StrictSorted(name, ninjaStr string)
CheckSorted(name, ninjaStr string)
// Evaluates a ninja string and returns the result. Used if more
// complicated modification needs to happen before giving it to Make.
Eval(ninjaStr string) (string, error)
}
// MakeVarsModuleContext contains the set of functions available for modules
// implementing the ModuleMakeVarsProvider interface.
type MakeVarsModuleContext interface {
BaseMakeVarsContext
}
var _ PathContext = MakeVarsContext(nil)
type MakeVarsProvider func(ctx MakeVarsContext)
func RegisterMakeVarsProvider(pctx PackageContext, provider MakeVarsProvider) {
makeVarsInitProviders = append(makeVarsInitProviders, makeVarsProvider{pctx, provider})
}
// SingletonMakeVarsProvider is a Singleton with an extra method to provide extra values to be exported to Make.
type SingletonMakeVarsProvider interface {
// MakeVars uses a MakeVarsContext to provide extra values to be exported to Make.
MakeVars(ctx MakeVarsContext)
}
var singletonMakeVarsProvidersKey = NewOnceKey("singletonMakeVarsProvidersKey")
func getSingletonMakevarsProviders(config Config) *[]makeVarsProvider {
return config.Once(singletonMakeVarsProvidersKey, func() interface{} {
return &[]makeVarsProvider{}
}).(*[]makeVarsProvider)
}
// registerSingletonMakeVarsProvider adds a singleton that implements SingletonMakeVarsProvider to
// the list of MakeVarsProviders to run.
func registerSingletonMakeVarsProvider(config Config, singleton SingletonMakeVarsProvider) {
// Singletons are registered on the Context and may be different between different Contexts,
// for example when running multiple tests. Store the SingletonMakeVarsProviders in the
// Config so they are attached to the Context.
singletonMakeVarsProviders := getSingletonMakevarsProviders(config)
*singletonMakeVarsProviders = append(*singletonMakeVarsProviders,
makeVarsProvider{pctx, singletonMakeVarsProviderAdapter(singleton)})
}
// singletonMakeVarsProviderAdapter converts a SingletonMakeVarsProvider to a MakeVarsProvider.
func singletonMakeVarsProviderAdapter(singleton SingletonMakeVarsProvider) MakeVarsProvider {
return func(ctx MakeVarsContext) { singleton.MakeVars(ctx) }
}
// ModuleMakeVarsProvider is a Module with an extra method to provide extra values to be exported to Make.
type ModuleMakeVarsProvider interface {
Module
// MakeVars uses a MakeVarsModuleContext to provide extra values to be exported to Make.
MakeVars(ctx MakeVarsModuleContext)
}
// /////////////////////////////////////////////////////////////////////////////
func makeVarsSingletonFunc() Singleton {
return &makeVarsSingleton{}
}
type makeVarsSingleton struct {
varsForTesting []makeVarsVariable
installsForTesting []byte
}
type makeVarsProvider struct {
pctx PackageContext
call MakeVarsProvider
}
// Collection of makevars providers that are registered in init() methods.
var makeVarsInitProviders []makeVarsProvider
type makeVarsContext struct {
SingletonContext
config Config
pctx PackageContext
vars []makeVarsVariable
phonies []phony
dists []dist
}
var _ MakeVarsContext = &makeVarsContext{}
type makeVarsVariable struct {
name string
value string
sort bool
strict bool
}
type phony struct {
name string
deps []string
}
type dist struct {
goals []string
paths []string
}
func (s *makeVarsSingleton) GenerateBuildActions(ctx SingletonContext) {
if !ctx.Config().KatiEnabled() {
return
}
outFile := absolutePath(PathForOutput(ctx,
"make_vars"+proptools.String(ctx.Config().productVariables.Make_suffix)+".mk").String())
lateOutFile := absolutePath(PathForOutput(ctx,
"late"+proptools.String(ctx.Config().productVariables.Make_suffix)+".mk").String())
installsFile := absolutePath(PathForOutput(ctx,
"installs"+proptools.String(ctx.Config().productVariables.Make_suffix)+".mk").String())
if ctx.Failed() {
return
}
var vars []makeVarsVariable
var dists []dist
var phonies []phony
var katiInstalls []katiInstall
var katiSymlinks []katiInstall
providers := append([]makeVarsProvider(nil), makeVarsInitProviders...)
providers = append(providers, *getSingletonMakevarsProviders(ctx.Config())...)
for _, provider := range providers {
mctx := &makeVarsContext{
SingletonContext: ctx,
pctx: provider.pctx,
}
provider.call(mctx)
vars = append(vars, mctx.vars...)
phonies = append(phonies, mctx.phonies...)
dists = append(dists, mctx.dists...)
}
ctx.VisitAllModules(func(m Module) {
if provider, ok := m.(ModuleMakeVarsProvider); ok && m.Enabled() {
mctx := &makeVarsContext{
SingletonContext: ctx,
}
provider.MakeVars(mctx)
vars = append(vars, mctx.vars...)
phonies = append(phonies, mctx.phonies...)
dists = append(dists, mctx.dists...)
}
if m.ExportedToMake() {
katiInstalls = append(katiInstalls, m.base().katiInstalls...)
katiSymlinks = append(katiSymlinks, m.base().katiSymlinks...)
}
})
if ctx.Failed() {
return
}
sort.Slice(vars, func(i, j int) bool {
return vars[i].name < vars[j].name
})
sort.Slice(phonies, func(i, j int) bool {
return phonies[i].name < phonies[j].name
})
lessArr := func(a, b []string) bool {
if len(a) == len(b) {
for i := range a {
if a[i] < b[i] {
return true
}
}
return false
}
return len(a) < len(b)
}
sort.Slice(dists, func(i, j int) bool {
return lessArr(dists[i].goals, dists[j].goals) || lessArr(dists[i].paths, dists[j].paths)
})
outBytes := s.writeVars(vars)
if err := pathtools.WriteFileIfChanged(outFile, outBytes, 0666); err != nil {
ctx.Errorf(err.Error())
}
lateOutBytes := s.writeLate(phonies, dists)
if err := pathtools.WriteFileIfChanged(lateOutFile, lateOutBytes, 0666); err != nil {
ctx.Errorf(err.Error())
}
installsBytes := s.writeInstalls(katiInstalls, katiSymlinks)
if err := pathtools.WriteFileIfChanged(installsFile, installsBytes, 0666); err != nil {
ctx.Errorf(err.Error())
}
// Only save state for tests when testing.
if ctx.Config().RunningInsideUnitTest() {
s.varsForTesting = vars
s.installsForTesting = installsBytes
}
}
func (s *makeVarsSingleton) writeVars(vars []makeVarsVariable) []byte {
buf := &bytes.Buffer{}
fmt.Fprint(buf, `# Autogenerated file
# Compares SOONG_$(1) against $(1), and warns if they are not equal.
#
# If the original variable is empty, then just set it to the SOONG_ version.
#
# $(1): Name of the variable to check
# $(2): If not-empty, sort the values before comparing
# $(3): Extra snippet to run if it does not match
define soong-compare-var
ifneq ($$($(1)),)
my_val_make := $$(strip $(if $(2),$$(sort $$($(1))),$$($(1))))
my_val_soong := $(if $(2),$$(sort $$(SOONG_$(1))),$$(SOONG_$(1)))
ifneq ($$(my_val_make),$$(my_val_soong))
$$(warning $(1) does not match between Make and Soong:)
$(if $(2),$$(warning Make adds: $$(filter-out $$(my_val_soong),$$(my_val_make))),$$(warning Make : $$(my_val_make)))
$(if $(2),$$(warning Soong adds: $$(filter-out $$(my_val_make),$$(my_val_soong))),$$(warning Soong: $$(my_val_soong)))
$(3)
endif
my_val_make :=
my_val_soong :=
else
$(1) := $$(SOONG_$(1))
endif
.KATI_READONLY := $(1) SOONG_$(1)
endef
my_check_failed := false
`)
// Write all the strict checks out first so that if one of them errors,
// we get all of the strict errors printed, but not the non-strict
// warnings.
for _, v := range vars {
if !v.strict {
continue
}
sort := ""
if v.sort {
sort = "true"
}
fmt.Fprintf(buf, "SOONG_%s := %s\n", v.name, v.value)
fmt.Fprintf(buf, "$(eval $(call soong-compare-var,%s,%s,my_check_failed := true))\n\n", v.name, sort)
}
fmt.Fprint(buf, `
ifneq ($(my_check_failed),false)
$(error Soong variable check failed)
endif
my_check_failed :=
`)
for _, v := range vars {
if v.strict {
continue
}
sort := ""
if v.sort {
sort = "true"
}
fmt.Fprintf(buf, "SOONG_%s := %s\n", v.name, v.value)
fmt.Fprintf(buf, "$(eval $(call soong-compare-var,%s,%s))\n\n", v.name, sort)
}
fmt.Fprintln(buf, "\nsoong-compare-var :=")
fmt.Fprintln(buf)
return buf.Bytes()
}
func (s *makeVarsSingleton) writeLate(phonies []phony, dists []dist) []byte {
buf := &bytes.Buffer{}
fmt.Fprint(buf, `# Autogenerated file
# Values written by Soong read after parsing all Android.mk files.
`)
for _, phony := range phonies {
fmt.Fprintf(buf, ".PHONY: %s\n", phony.name)
fmt.Fprintf(buf, "%s: %s\n", phony.name, strings.Join(phony.deps, "\\\n "))
}
fmt.Fprintln(buf)
for _, dist := range dists {
fmt.Fprintf(buf, ".PHONY: %s\n", strings.Join(dist.goals, " "))
fmt.Fprintf(buf, "$(call dist-for-goals,%s,%s)\n",
strings.Join(dist.goals, " "), strings.Join(dist.paths, " "))
}
return buf.Bytes()
}
// writeInstalls writes the list of install rules generated by Soong to a makefile. The rules
// are exported to Make instead of written directly to the ninja file so that main.mk can add
// the dependencies from the `required` property that are hard to resolve in Soong.
func (s *makeVarsSingleton) writeInstalls(installs, symlinks []katiInstall) []byte {
buf := &bytes.Buffer{}
fmt.Fprint(buf, `# Autogenerated file
# Values written by Soong to generate install rules that can be amended by Kati.
`)
preserveSymlinksFlag := "-d"
if runtime.GOOS == "darwin" {
preserveSymlinksFlag = "-R"
}
for _, install := range installs {
// Write a rule for each install request in the form:
// to: from [ deps ] [ | order only deps ]
// cp -f -d $< $@ [ && chmod +x $@ ]
fmt.Fprintf(buf, "%s: %s", install.to.String(), install.from.String())
for _, dep := range install.implicitDeps {
fmt.Fprintf(buf, " %s", dep.String())
}
if extraFiles := install.extraFiles; extraFiles != nil {
fmt.Fprintf(buf, " %s", extraFiles.zip.String())
}
if len(install.orderOnlyDeps) > 0 {
fmt.Fprintf(buf, " |")
}
for _, dep := range install.orderOnlyDeps {
fmt.Fprintf(buf, " %s", dep.String())
}
fmt.Fprintln(buf)
fmt.Fprintln(buf, "\t@echo \"Install: $@\"")
fmt.Fprintf(buf, "\trm -f $@ && cp -f %s $< $@\n", preserveSymlinksFlag)
if install.executable {
fmt.Fprintf(buf, "\tchmod +x $@\n")
}
if extraFiles := install.extraFiles; extraFiles != nil {
fmt.Fprintf(buf, "\t( unzip -qDD -d '%s' '%s' 2>&1 | grep -v \"zipfile is empty\"; exit $${PIPESTATUS[0]} ) || \\\n", extraFiles.dir.String(), extraFiles.zip.String())
fmt.Fprintf(buf, "\t ( code=$$?; if [ $$code -ne 0 -a $$code -ne 1 ]; then exit $$code; fi )\n")
}
fmt.Fprintln(buf)
}
for _, symlink := range symlinks {
fmt.Fprintf(buf, "%s:", symlink.to.String())
if symlink.from != nil {
// The symlink doesn't need updating when the target is modified, but we sometimes
// have a dependency on a symlink to a binary instead of to the binary directly, and
// the mtime of the symlink must be updated when the binary is modified, so use a
// normal dependency here instead of an order-only dependency.
fmt.Fprintf(buf, " %s", symlink.from.String())
}
for _, dep := range symlink.implicitDeps {
fmt.Fprintf(buf, " %s", dep.String())
}
if len(symlink.orderOnlyDeps) > 0 {
fmt.Fprintf(buf, " |")
}
for _, dep := range symlink.orderOnlyDeps {
fmt.Fprintf(buf, " %s", dep.String())
}
fmt.Fprintln(buf)
fromStr := ""
if symlink.from != nil {
rel, err := filepath.Rel(filepath.Dir(symlink.to.String()), symlink.from.String())
if err != nil {
panic(fmt.Errorf("failed to find relative path for symlink from %q to %q: %w",
symlink.from.String(), symlink.to.String(), err))
}
fromStr = rel
} else {
fromStr = symlink.absFrom
}
fmt.Fprintln(buf, "\t@echo \"Symlink: $@\"")
fmt.Fprintf(buf, "\trm -f $@ && ln -sfn %s $@", fromStr)
fmt.Fprintln(buf)
fmt.Fprintln(buf)
}
return buf.Bytes()
}
func (c *makeVarsContext) DeviceConfig() DeviceConfig {
return DeviceConfig{c.Config().deviceConfig}
}
var ninjaDescaper = strings.NewReplacer("$$", "$")
func (c *makeVarsContext) Eval(ninjaStr string) (string, error) {
s, err := c.SingletonContext.Eval(c.pctx, ninjaStr)
if err != nil {
return "", err
}
// SingletonContext.Eval returns an exapnded string that is valid for a ninja file, de-escape $$ to $ for use
// in a Makefile
return ninjaDescaper.Replace(s), nil
}
func (c *makeVarsContext) addVariableRaw(name, value string, strict, sort bool) {
c.vars = append(c.vars, makeVarsVariable{
name: name,
value: value,
strict: strict,
sort: sort,
})
}
func (c *makeVarsContext) addVariable(name, ninjaStr string, strict, sort bool) {
value, err := c.Eval(ninjaStr)
if err != nil {
c.SingletonContext.Errorf(err.Error())
}
c.addVariableRaw(name, value, strict, sort)
}
func (c *makeVarsContext) addPhony(name string, deps []string) {
c.phonies = append(c.phonies, phony{name, deps})
}
func (c *makeVarsContext) addDist(goals []string, paths []string) {
c.dists = append(c.dists, dist{
goals: goals,
paths: paths,
})
}
func (c *makeVarsContext) Strict(name, ninjaStr string) {
c.addVariable(name, ninjaStr, true, false)
}
func (c *makeVarsContext) StrictSorted(name, ninjaStr string) {
c.addVariable(name, ninjaStr, true, true)
}
func (c *makeVarsContext) StrictRaw(name, value string) {
c.addVariableRaw(name, value, true, false)
}
func (c *makeVarsContext) Check(name, ninjaStr string) {
c.addVariable(name, ninjaStr, false, false)
}
func (c *makeVarsContext) CheckSorted(name, ninjaStr string) {
c.addVariable(name, ninjaStr, false, true)
}
func (c *makeVarsContext) CheckRaw(name, value string) {
c.addVariableRaw(name, value, false, false)
}
func (c *makeVarsContext) Phony(name string, deps ...Path) {
c.addPhony(name, Paths(deps).Strings())
}
func (c *makeVarsContext) DistForGoal(goal string, paths ...Path) {
c.DistForGoals([]string{goal}, paths...)
}
func (c *makeVarsContext) DistForGoalWithFilename(goal string, path Path, filename string) {
c.DistForGoalsWithFilename([]string{goal}, path, filename)
}
func (c *makeVarsContext) DistForGoals(goals []string, paths ...Path) {
c.addDist(goals, Paths(paths).Strings())
}
func (c *makeVarsContext) DistForGoalsWithFilename(goals []string, path Path, filename string) {
c.addDist(goals, []string{path.String() + ":" + filename})
}