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// Copyright 2015 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.
// A genrule module takes a list of source files ("srcs" property), an optional
// list of tools ("tools" property), and a command line ("cmd" property), to
// generate output files ("out" property).
package genrule
import (
"fmt"
"io"
"path/filepath"
"strconv"
"strings"
"github.com/google/blueprint"
"github.com/google/blueprint/bootstrap"
"github.com/google/blueprint/proptools"
"android/soong/android"
"android/soong/bazel"
)
func init() {
RegisterGenruleBuildComponents(android.InitRegistrationContext)
}
// Test fixture preparer that will register most genrule build components.
//
// Singletons and mutators should only be added here if they are needed for a majority of genrule
// module types, otherwise they should be added under a separate preparer to allow them to be
// selected only when needed to reduce test execution time.
//
// Module types do not have much of an overhead unless they are used so this should include as many
// module types as possible. The exceptions are those module types that require mutators and/or
// singletons in order to function in which case they should be kept together in a separate
// preparer.
var PrepareForTestWithGenRuleBuildComponents = android.GroupFixturePreparers(
android.FixtureRegisterWithContext(RegisterGenruleBuildComponents),
)
// Prepare a fixture to use all genrule module types, mutators and singletons fully.
//
// This should only be used by tests that want to run with as much of the build enabled as possible.
var PrepareForIntegrationTestWithGenrule = android.GroupFixturePreparers(
PrepareForTestWithGenRuleBuildComponents,
)
func RegisterGenruleBuildComponents(ctx android.RegistrationContext) {
ctx.RegisterModuleType("genrule_defaults", defaultsFactory)
ctx.RegisterModuleType("gensrcs", GenSrcsFactory)
ctx.RegisterModuleType("genrule", GenRuleFactory)
ctx.FinalDepsMutators(func(ctx android.RegisterMutatorsContext) {
ctx.BottomUp("genrule_tool_deps", toolDepsMutator).Parallel()
})
android.RegisterBp2BuildMutator("genrule", GenruleBp2Build)
}
func RegisterGenruleBp2BuildDeps(ctx android.RegisterMutatorsContext) {
ctx.BottomUp("genrule_tool_deps", toolDepsMutator)
}
var (
pctx = android.NewPackageContext("android/soong/genrule")
// Used by gensrcs when there is more than 1 shard to merge the outputs
// of each shard into a zip file.
gensrcsMerge = pctx.AndroidStaticRule("gensrcsMerge", blueprint.RuleParams{
Command: "${soongZip} -o ${tmpZip} @${tmpZip}.rsp && ${zipSync} -d ${genDir} ${tmpZip}",
CommandDeps: []string{"${soongZip}", "${zipSync}"},
Rspfile: "${tmpZip}.rsp",
RspfileContent: "${zipArgs}",
}, "tmpZip", "genDir", "zipArgs")
)
func init() {
pctx.Import("android/soong/android")
pctx.HostBinToolVariable("soongZip", "soong_zip")
pctx.HostBinToolVariable("zipSync", "zipsync")
}
type SourceFileGenerator interface {
GeneratedSourceFiles() android.Paths
GeneratedHeaderDirs() android.Paths
GeneratedDeps() android.Paths
}
// Alias for android.HostToolProvider
// Deprecated: use android.HostToolProvider instead.
type HostToolProvider interface {
android.HostToolProvider
}
type hostToolDependencyTag struct {
blueprint.BaseDependencyTag
label string
}
type generatorProperties struct {
// The command to run on one or more input files. Cmd supports substitution of a few variables.
//
// Available variables for substitution:
//
// $(location): the path to the first entry in tools or tool_files.
// $(location <label>): the path to the tool, tool_file, input or output with name <label>. Use $(location) if <label> refers to a rule that outputs exactly one file.
// $(locations <label>): the paths to the tools, tool_files, inputs or outputs with name <label>. Use $(locations) if <label> refers to a rule that outputs two or more files.
// $(in): one or more input files.
// $(out): a single output file.
// $(depfile): a file to which dependencies will be written, if the depfile property is set to true.
// $(genDir): the sandbox directory for this tool; contains $(out).
// $$: a literal $
Cmd *string
// Enable reading a file containing dependencies in gcc format after the command completes
Depfile *bool
// name of the modules (if any) that produces the host executable. Leave empty for
// prebuilts or scripts that do not need a module to build them.
Tools []string
// Local file that is used as the tool
Tool_files []string `android:"path"`
// List of directories to export generated headers from
Export_include_dirs []string
// list of input files
Srcs []string `android:"path,arch_variant"`
// input files to exclude
Exclude_srcs []string `android:"path,arch_variant"`
}
type Module struct {
android.ModuleBase
android.DefaultableModuleBase
android.BazelModuleBase
android.ApexModuleBase
// For other packages to make their own genrules with extra
// properties
Extra interface{}
android.ImageInterface
properties generatorProperties
// For the different tasks that genrule and gensrc generate. genrule will
// generate 1 task, and gensrc will generate 1 or more tasks based on the
// number of shards the input files are sharded into.
taskGenerator taskFunc
rule blueprint.Rule
rawCommands []string
exportedIncludeDirs android.Paths
outputFiles android.Paths
outputDeps android.Paths
subName string
subDir string
// Collect the module directory for IDE info in java/jdeps.go.
modulePaths []string
}
type taskFunc func(ctx android.ModuleContext, rawCommand string, srcFiles android.Paths) []generateTask
type generateTask struct {
in android.Paths
out android.WritablePaths
depFile android.WritablePath
copyTo android.WritablePaths // For gensrcs to set on gensrcsMerge rule.
genDir android.WritablePath
extraTools android.Paths // dependencies on tools used by the generator
cmd string
// For gensrsc sharding.
shard int
shards int
}
func (g *Module) GeneratedSourceFiles() android.Paths {
return g.outputFiles
}
func (g *Module) Srcs() android.Paths {
return append(android.Paths{}, g.outputFiles...)
}
func (g *Module) GeneratedHeaderDirs() android.Paths {
return g.exportedIncludeDirs
}
func (g *Module) GeneratedDeps() android.Paths {
return g.outputDeps
}
func (g *Module) OutputFiles(tag string) (android.Paths, error) {
if tag == "" {
return append(android.Paths{}, g.outputFiles...), nil
}
// otherwise, tag should match one of outputs
for _, outputFile := range g.outputFiles {
if outputFile.Rel() == tag {
return android.Paths{outputFile}, nil
}
}
return nil, fmt.Errorf("unsupported module reference tag %q", tag)
}
var _ android.SourceFileProducer = (*Module)(nil)
var _ android.OutputFileProducer = (*Module)(nil)
func toolDepsMutator(ctx android.BottomUpMutatorContext) {
if g, ok := ctx.Module().(*Module); ok {
for _, tool := range g.properties.Tools {
tag := hostToolDependencyTag{label: tool}
if m := android.SrcIsModule(tool); m != "" {
tool = m
}
ctx.AddFarVariationDependencies(ctx.Config().BuildOSTarget.Variations(), tag, tool)
}
}
}
// Returns true if information was available from Bazel, false if bazel invocation still needs to occur.
func (c *Module) GenerateBazelBuildActions(ctx android.ModuleContext, label string) bool {
bazelCtx := ctx.Config().BazelContext
filePaths, ok := bazelCtx.GetOutputFiles(label, ctx.Arch().ArchType)
if ok {
var bazelOutputFiles android.Paths
exportIncludeDirs := map[string]bool{}
for _, bazelOutputFile := range filePaths {
bazelOutputFiles = append(bazelOutputFiles, android.PathForBazelOut(ctx, bazelOutputFile))
exportIncludeDirs[filepath.Dir(bazelOutputFile)] = true
}
c.outputFiles = bazelOutputFiles
c.outputDeps = bazelOutputFiles
for includePath, _ := range exportIncludeDirs {
c.exportedIncludeDirs = append(c.exportedIncludeDirs, android.PathForBazelOut(ctx, includePath))
}
}
return ok
}
func (g *Module) GenerateAndroidBuildActions(ctx android.ModuleContext) {
g.subName = ctx.ModuleSubDir()
// Collect the module directory for IDE info in java/jdeps.go.
g.modulePaths = append(g.modulePaths, ctx.ModuleDir())
if len(g.properties.Export_include_dirs) > 0 {
for _, dir := range g.properties.Export_include_dirs {
g.exportedIncludeDirs = append(g.exportedIncludeDirs,
android.PathForModuleGen(ctx, g.subDir, ctx.ModuleDir(), dir))
}
} else {
g.exportedIncludeDirs = append(g.exportedIncludeDirs, android.PathForModuleGen(ctx, g.subDir))
}
locationLabels := map[string]location{}
firstLabel := ""
addLocationLabel := func(label string, loc location) {
if firstLabel == "" {
firstLabel = label
}
if _, exists := locationLabels[label]; !exists {
locationLabels[label] = loc
} else {
ctx.ModuleErrorf("multiple labels for %q, %q and %q",
label, locationLabels[label], loc)
}
}
var tools android.Paths
var packagedTools []android.PackagingSpec
if len(g.properties.Tools) > 0 {
seenTools := make(map[string]bool)
ctx.VisitDirectDepsBlueprint(func(module blueprint.Module) {
switch tag := ctx.OtherModuleDependencyTag(module).(type) {
case hostToolDependencyTag:
tool := ctx.OtherModuleName(module)
switch t := module.(type) {
case android.HostToolProvider:
// A HostToolProvider provides the path to a tool, which will be copied
// into the sandbox.
if !t.(android.Module).Enabled() {
if ctx.Config().AllowMissingDependencies() {
ctx.AddMissingDependencies([]string{tool})
} else {
ctx.ModuleErrorf("depends on disabled module %q", tool)
}
return
}
path := t.HostToolPath()
if !path.Valid() {
ctx.ModuleErrorf("host tool %q missing output file", tool)
return
}
if specs := t.TransitivePackagingSpecs(); specs != nil {
// If the HostToolProvider has PackgingSpecs, which are definitions of the
// required relative locations of the tool and its dependencies, use those
// instead. They will be copied to those relative locations in the sbox
// sandbox.
packagedTools = append(packagedTools, specs...)
// Assume that the first PackagingSpec of the module is the tool.
addLocationLabel(tag.label, packagedToolLocation{specs[0]})
} else {
tools = append(tools, path.Path())
addLocationLabel(tag.label, toolLocation{android.Paths{path.Path()}})
}
case bootstrap.GoBinaryTool:
// A GoBinaryTool provides the install path to a tool, which will be copied.
if s, err := filepath.Rel(android.PathForOutput(ctx).String(), t.InstallPath()); err == nil {
toolPath := android.PathForOutput(ctx, s)
tools = append(tools, toolPath)
addLocationLabel(tag.label, toolLocation{android.Paths{toolPath}})
} else {
ctx.ModuleErrorf("cannot find path for %q: %v", tool, err)
return
}
default:
ctx.ModuleErrorf("%q is not a host tool provider", tool)
return
}
seenTools[tag.label] = true
}
})
// If AllowMissingDependencies is enabled, the build will not have stopped when
// AddFarVariationDependencies was called on a missing tool, which will result in nonsensical
// "cmd: unknown location label ..." errors later. Add a placeholder file to the local label.
// The command that uses this placeholder file will never be executed because the rule will be
// replaced with an android.Error rule reporting the missing dependencies.
if ctx.Config().AllowMissingDependencies() {
for _, tool := range g.properties.Tools {
if !seenTools[tool] {
addLocationLabel(tool, errorLocation{"***missing tool " + tool + "***"})
}
}
}
}
if ctx.Failed() {
return
}
for _, toolFile := range g.properties.Tool_files {
paths := android.PathsForModuleSrc(ctx, []string{toolFile})
tools = append(tools, paths...)
addLocationLabel(toolFile, toolLocation{paths})
}
var srcFiles android.Paths
for _, in := range g.properties.Srcs {
paths, missingDeps := android.PathsAndMissingDepsForModuleSrcExcludes(ctx, []string{in}, g.properties.Exclude_srcs)
if len(missingDeps) > 0 {
if !ctx.Config().AllowMissingDependencies() {
panic(fmt.Errorf("should never get here, the missing dependencies %q should have been reported in DepsMutator",
missingDeps))
}
// If AllowMissingDependencies is enabled, the build will not have stopped when
// the dependency was added on a missing SourceFileProducer module, which will result in nonsensical
// "cmd: label ":..." has no files" errors later. Add a placeholder file to the local label.
// The command that uses this placeholder file will never be executed because the rule will be
// replaced with an android.Error rule reporting the missing dependencies.
ctx.AddMissingDependencies(missingDeps)
addLocationLabel(in, errorLocation{"***missing srcs " + in + "***"})
} else {
srcFiles = append(srcFiles, paths...)
addLocationLabel(in, inputLocation{paths})
}
}
var copyFrom android.Paths
var outputFiles android.WritablePaths
var zipArgs strings.Builder
// Generate tasks, either from genrule or gensrcs.
for _, task := range g.taskGenerator(ctx, String(g.properties.Cmd), srcFiles) {
if len(task.out) == 0 {
ctx.ModuleErrorf("must have at least one output file")
return
}
// Pick a unique path outside the task.genDir for the sbox manifest textproto,
// a unique rule name, and the user-visible description.
manifestName := "genrule.sbox.textproto"
desc := "generate"
name := "generator"
if task.shards > 0 {
manifestName = "genrule_" + strconv.Itoa(task.shard) + ".sbox.textproto"
desc += " " + strconv.Itoa(task.shard)
name += strconv.Itoa(task.shard)
} else if len(task.out) == 1 {
desc += " " + task.out[0].Base()
}
manifestPath := android.PathForModuleOut(ctx, manifestName)
// Use a RuleBuilder to create a rule that runs the command inside an sbox sandbox.
rule := android.NewRuleBuilder(pctx, ctx).Sbox(task.genDir, manifestPath).SandboxTools()
cmd := rule.Command()
for _, out := range task.out {
addLocationLabel(out.Rel(), outputLocation{out})
}
referencedDepfile := false
rawCommand, err := android.Expand(task.cmd, func(name string) (string, error) {
// report the error directly without returning an error to android.Expand to catch multiple errors in a
// single run
reportError := func(fmt string, args ...interface{}) (string, error) {
ctx.PropertyErrorf("cmd", fmt, args...)
return "SOONG_ERROR", nil
}
switch name {
case "location":
if len(g.properties.Tools) == 0 && len(g.properties.Tool_files) == 0 {
return reportError("at least one `tools` or `tool_files` is required if $(location) is used")
}
loc := locationLabels[firstLabel]
paths := loc.Paths(cmd)
if len(paths) == 0 {
return reportError("default label %q has no files", firstLabel)
} else if len(paths) > 1 {
return reportError("default label %q has multiple files, use $(locations %s) to reference it",
firstLabel, firstLabel)
}
return paths[0], nil
case "in":
return strings.Join(cmd.PathsForInputs(srcFiles), " "), nil
case "out":
var sandboxOuts []string
for _, out := range task.out {
sandboxOuts = append(sandboxOuts, cmd.PathForOutput(out))
}
return strings.Join(sandboxOuts, " "), nil
case "depfile":
referencedDepfile = true
if !Bool(g.properties.Depfile) {
return reportError("$(depfile) used without depfile property")
}
return "__SBOX_DEPFILE__", nil
case "genDir":
return cmd.PathForOutput(task.genDir), nil
default:
if strings.HasPrefix(name, "location ") {
label := strings.TrimSpace(strings.TrimPrefix(name, "location "))
if loc, ok := locationLabels[label]; ok {
paths := loc.Paths(cmd)
if len(paths) == 0 {
return reportError("label %q has no files", label)
} else if len(paths) > 1 {
return reportError("label %q has multiple files, use $(locations %s) to reference it",
label, label)
}
return paths[0], nil
} else {
return reportError("unknown location label %q", label)
}
} else if strings.HasPrefix(name, "locations ") {
label := strings.TrimSpace(strings.TrimPrefix(name, "locations "))
if loc, ok := locationLabels[label]; ok {
paths := loc.Paths(cmd)
if len(paths) == 0 {
return reportError("label %q has no files", label)
}
return strings.Join(paths, " "), nil
} else {
return reportError("unknown locations label %q", label)
}
} else {
return reportError("unknown variable '$(%s)'", name)
}
}
})
if err != nil {
ctx.PropertyErrorf("cmd", "%s", err.Error())
return
}
if Bool(g.properties.Depfile) && !referencedDepfile {
ctx.PropertyErrorf("cmd", "specified depfile=true but did not include a reference to '${depfile}' in cmd")
return
}
g.rawCommands = append(g.rawCommands, rawCommand)
cmd.Text(rawCommand)
cmd.ImplicitOutputs(task.out)
cmd.Implicits(task.in)
cmd.ImplicitTools(tools)
cmd.ImplicitTools(task.extraTools)
cmd.ImplicitPackagedTools(packagedTools)
if Bool(g.properties.Depfile) {
cmd.ImplicitDepFile(task.depFile)
}
// Create the rule to run the genrule command inside sbox.
rule.Build(name, desc)
if len(task.copyTo) > 0 {
// If copyTo is set, multiple shards need to be copied into a single directory.
// task.out contains the per-shard paths, and copyTo contains the corresponding
// final path. The files need to be copied into the final directory by a
// single rule so it can remove the directory before it starts to ensure no
// old files remain. zipsync already does this, so build up zipArgs that
// zip all the per-shard directories into a single zip.
outputFiles = append(outputFiles, task.copyTo...)
copyFrom = append(copyFrom, task.out.Paths()...)
zipArgs.WriteString(" -C " + task.genDir.String())
zipArgs.WriteString(android.JoinWithPrefix(task.out.Strings(), " -f "))
} else {
outputFiles = append(outputFiles, task.out...)
}
}
if len(copyFrom) > 0 {
// Create a rule that zips all the per-shard directories into a single zip and then
// uses zipsync to unzip it into the final directory.
ctx.Build(pctx, android.BuildParams{
Rule: gensrcsMerge,
Implicits: copyFrom,
Outputs: outputFiles,
Description: "merge shards",
Args: map[string]string{
"zipArgs": zipArgs.String(),
"tmpZip": android.PathForModuleGen(ctx, g.subDir+".zip").String(),
"genDir": android.PathForModuleGen(ctx, g.subDir).String(),
},
})
}
g.outputFiles = outputFiles.Paths()
bazelModuleLabel := g.GetBazelLabel(ctx, g)
bazelActionsUsed := false
if g.MixedBuildsEnabled(ctx) {
bazelActionsUsed = g.GenerateBazelBuildActions(ctx, bazelModuleLabel)
}
if !bazelActionsUsed {
// For <= 6 outputs, just embed those directly in the users. Right now, that covers >90% of
// the genrules on AOSP. That will make things simpler to look at the graph in the common
// case. For larger sets of outputs, inject a phony target in between to limit ninja file
// growth.
if len(g.outputFiles) <= 6 {
g.outputDeps = g.outputFiles
} else {
phonyFile := android.PathForModuleGen(ctx, "genrule-phony")
ctx.Build(pctx, android.BuildParams{
Rule: blueprint.Phony,
Output: phonyFile,
Inputs: g.outputFiles,
})
g.outputDeps = android.Paths{phonyFile}
}
}
}
// Collect information for opening IDE project files in java/jdeps.go.
func (g *Module) IDEInfo(dpInfo *android.IdeInfo) {
dpInfo.Srcs = append(dpInfo.Srcs, g.Srcs().Strings()...)
for _, src := range g.properties.Srcs {
if strings.HasPrefix(src, ":") {
src = strings.Trim(src, ":")
dpInfo.Deps = append(dpInfo.Deps, src)
}
}
dpInfo.Paths = append(dpInfo.Paths, g.modulePaths...)
}
func (g *Module) AndroidMk() android.AndroidMkData {
return android.AndroidMkData{
Class: "ETC",
OutputFile: android.OptionalPathForPath(g.outputFiles[0]),
SubName: g.subName,
Extra: []android.AndroidMkExtraFunc{
func(w io.Writer, outputFile android.Path) {
fmt.Fprintln(w, "LOCAL_UNINSTALLABLE_MODULE := true")
},
},
Custom: func(w io.Writer, name, prefix, moduleDir string, data android.AndroidMkData) {
android.WriteAndroidMkData(w, data)
if data.SubName != "" {
fmt.Fprintln(w, ".PHONY:", name)
fmt.Fprintln(w, name, ":", name+g.subName)
}
},
}
}
var _ android.ApexModule = (*Module)(nil)
// Implements android.ApexModule
func (g *Module) ShouldSupportSdkVersion(ctx android.BaseModuleContext,
sdkVersion android.ApiLevel) error {
// Because generated outputs are checked by client modules(e.g. cc_library, ...)
// we can safely ignore the check here.
return nil
}
func generatorFactory(taskGenerator taskFunc, props ...interface{}) *Module {
module := &Module{
taskGenerator: taskGenerator,
}
module.AddProperties(props...)
module.AddProperties(&module.properties)
module.ImageInterface = noopImageInterface{}
return module
}
type noopImageInterface struct{}
func (x noopImageInterface) ImageMutatorBegin(android.BaseModuleContext) {}
func (x noopImageInterface) CoreVariantNeeded(android.BaseModuleContext) bool { return false }
func (x noopImageInterface) RamdiskVariantNeeded(android.BaseModuleContext) bool { return false }
func (x noopImageInterface) VendorRamdiskVariantNeeded(android.BaseModuleContext) bool { return false }
func (x noopImageInterface) DebugRamdiskVariantNeeded(android.BaseModuleContext) bool { return false }
func (x noopImageInterface) RecoveryVariantNeeded(android.BaseModuleContext) bool { return false }
func (x noopImageInterface) ExtraImageVariations(ctx android.BaseModuleContext) []string { return nil }
func (x noopImageInterface) SetImageVariation(ctx android.BaseModuleContext, variation string, module android.Module) {
}
func NewGenSrcs() *Module {
properties := &genSrcsProperties{}
// finalSubDir is the name of the subdirectory that output files will be generated into.
// It is used so that per-shard directories can be placed alongside it an then finally
// merged into it.
const finalSubDir = "gensrcs"
taskGenerator := func(ctx android.ModuleContext, rawCommand string, srcFiles android.Paths) []generateTask {
shardSize := defaultShardSize
if s := properties.Shard_size; s != nil {
shardSize = int(*s)
}
// gensrcs rules can easily hit command line limits by repeating the command for
// every input file. Shard the input files into groups.
shards := android.ShardPaths(srcFiles, shardSize)
var generateTasks []generateTask
for i, shard := range shards {
var commands []string
var outFiles android.WritablePaths
var commandDepFiles []string
var copyTo android.WritablePaths
// When sharding is enabled (i.e. len(shards) > 1), the sbox rules for each
// shard will be write to their own directories and then be merged together
// into finalSubDir. If sharding is not enabled (i.e. len(shards) == 1),
// the sbox rule will write directly to finalSubDir.
genSubDir := finalSubDir
if len(shards) > 1 {
genSubDir = strconv.Itoa(i)
}
genDir := android.PathForModuleGen(ctx, genSubDir)
// TODO(ccross): this RuleBuilder is a hack to be able to call
// rule.Command().PathForOutput. Replace this with passing the rule into the
// generator.
rule := android.NewRuleBuilder(pctx, ctx).Sbox(genDir, nil).SandboxTools()
for _, in := range shard {
outFile := android.GenPathWithExt(ctx, finalSubDir, in, String(properties.Output_extension))
// If sharding is enabled, then outFile is the path to the output file in
// the shard directory, and copyTo is the path to the output file in the
// final directory.
if len(shards) > 1 {
shardFile := android.GenPathWithExt(ctx, genSubDir, in, String(properties.Output_extension))
copyTo = append(copyTo, outFile)
outFile = shardFile
}
outFiles = append(outFiles, outFile)
// pre-expand the command line to replace $in and $out with references to
// a single input and output file.
command, err := android.Expand(rawCommand, func(name string) (string, error) {
switch name {
case "in":
return in.String(), nil
case "out":
return rule.Command().PathForOutput(outFile), nil
case "depfile":
// Generate a depfile for each output file. Store the list for
// later in order to combine them all into a single depfile.
depFile := rule.Command().PathForOutput(outFile.ReplaceExtension(ctx, "d"))
commandDepFiles = append(commandDepFiles, depFile)
return depFile, nil
default:
return "$(" + name + ")", nil
}
})
if err != nil {
ctx.PropertyErrorf("cmd", err.Error())
}
// escape the command in case for example it contains '#', an odd number of '"', etc
command = fmt.Sprintf("bash -c %v", proptools.ShellEscape(command))
commands = append(commands, command)
}
fullCommand := strings.Join(commands, " && ")
var outputDepfile android.WritablePath
var extraTools android.Paths
if len(commandDepFiles) > 0 {
// Each command wrote to a depfile, but ninja can only handle one
// depfile per rule. Use the dep_fixer tool at the end of the
// command to combine all the depfiles into a single output depfile.
outputDepfile = android.PathForModuleGen(ctx, genSubDir, "gensrcs.d")
depFixerTool := ctx.Config().HostToolPath(ctx, "dep_fixer")
fullCommand += fmt.Sprintf(" && %s -o $(depfile) %s",
rule.Command().PathForTool(depFixerTool),
strings.Join(commandDepFiles, " "))
extraTools = append(extraTools, depFixerTool)
}
generateTasks = append(generateTasks, generateTask{
in: shard,
out: outFiles,
depFile: outputDepfile,
copyTo: copyTo,
genDir: genDir,
cmd: fullCommand,
shard: i,
shards: len(shards),
extraTools: extraTools,
})
}
return generateTasks
}
g := generatorFactory(taskGenerator, properties)
g.subDir = finalSubDir
return g
}
func GenSrcsFactory() android.Module {
m := NewGenSrcs()
android.InitAndroidModule(m)
return m
}
type genSrcsProperties struct {
// extension that will be substituted for each output file
Output_extension *string
// maximum number of files that will be passed on a single command line.
Shard_size *int64
}
const defaultShardSize = 50
func NewGenRule() *Module {
properties := &genRuleProperties{}
taskGenerator := func(ctx android.ModuleContext, rawCommand string, srcFiles android.Paths) []generateTask {
outs := make(android.WritablePaths, len(properties.Out))
var depFile android.WritablePath
for i, out := range properties.Out {
outPath := android.PathForModuleGen(ctx, out)
if i == 0 {
depFile = outPath.ReplaceExtension(ctx, "d")
}
outs[i] = outPath
}
return []generateTask{{
in: srcFiles,
out: outs,
depFile: depFile,
genDir: android.PathForModuleGen(ctx),
cmd: rawCommand,
}}
}
return generatorFactory(taskGenerator, properties)
}
func GenRuleFactory() android.Module {
m := NewGenRule()
android.InitAndroidModule(m)
android.InitDefaultableModule(m)
android.InitBazelModule(m)
return m
}
type genRuleProperties struct {
// names of the output files that will be generated
Out []string `android:"arch_variant"`
}
type bazelGenruleAttributes struct {
Srcs bazel.LabelListAttribute
Outs []string
Tools bazel.LabelListAttribute
Cmd string
}
type bazelGenrule struct {
android.BazelTargetModuleBase
bazelGenruleAttributes
}
func BazelGenruleFactory() android.Module {
module := &bazelGenrule{}
module.AddProperties(&module.bazelGenruleAttributes)
android.InitBazelTargetModule(module)
return module
}
func GenruleBp2Build(ctx android.TopDownMutatorContext) {
m, ok := ctx.Module().(*Module)
if !ok || !m.ConvertWithBp2build(ctx) {
return
}
if ctx.ModuleType() != "genrule" {
// Not a regular genrule. Could be a cc_genrule or java_genrule.
return
}
// Bazel only has the "tools" attribute.
tools_prop := android.BazelLabelForModuleDeps(ctx, m.properties.Tools)
tool_files_prop := android.BazelLabelForModuleSrc(ctx, m.properties.Tool_files)
tools_prop.Append(tool_files_prop)
tools := bazel.MakeLabelListAttribute(tools_prop)
srcs := bazel.MakeLabelListAttribute(android.BazelLabelForModuleSrc(ctx, m.properties.Srcs))
var allReplacements bazel.LabelList
allReplacements.Append(tools.Value)
allReplacements.Append(srcs.Value)
// Replace in and out variables with $< and $@
var cmd string
if m.properties.Cmd != nil {
cmd = strings.Replace(*m.properties.Cmd, "$(in)", "$(SRCS)", -1)
cmd = strings.Replace(cmd, "$(out)", "$(OUTS)", -1)
cmd = strings.Replace(cmd, "$(genDir)", "$(GENDIR)", -1)
if len(tools.Value.Includes) > 0 {
cmd = strings.Replace(cmd, "$(location)", fmt.Sprintf("$(location %s)", tools.Value.Includes[0].Label), -1)
cmd = strings.Replace(cmd, "$(locations)", fmt.Sprintf("$(locations %s)", tools.Value.Includes[0].Label), -1)
}
for _, l := range allReplacements.Includes {
bpLoc := fmt.Sprintf("$(location %s)", l.OriginalModuleName)
bpLocs := fmt.Sprintf("$(locations %s)", l.OriginalModuleName)
bazelLoc := fmt.Sprintf("$(location %s)", l.Label)
bazelLocs := fmt.Sprintf("$(locations %s)", l.Label)
cmd = strings.Replace(cmd, bpLoc, bazelLoc, -1)
cmd = strings.Replace(cmd, bpLocs, bazelLocs, -1)
}
}
// The Out prop is not in an immediately accessible field
// in the Module struct, so use GetProperties and cast it
// to the known struct prop.
var outs []string
for _, propIntf := range m.GetProperties() {
if props, ok := propIntf.(*genRuleProperties); ok {
outs = props.Out
break
}
}
attrs := &bazelGenruleAttributes{
Srcs: srcs,
Outs: outs,
Cmd: cmd,
Tools: tools,
}
props := bazel.BazelTargetModuleProperties{
Rule_class: "genrule",
}
// Create the BazelTargetModule.
ctx.CreateBazelTargetModule(BazelGenruleFactory, m.Name(), props, attrs)
}
func (m *bazelGenrule) Name() string {
return m.BaseModuleName()
}
func (m *bazelGenrule) GenerateAndroidBuildActions(ctx android.ModuleContext) {}
var Bool = proptools.Bool
var String = proptools.String
//
// Defaults
//
type Defaults struct {
android.ModuleBase
android.DefaultsModuleBase
}
func defaultsFactory() android.Module {
return DefaultsFactory()
}
func DefaultsFactory(props ...interface{}) android.Module {
module := &Defaults{}
module.AddProperties(props...)
module.AddProperties(
&generatorProperties{},
&genRuleProperties{},
)
android.InitDefaultsModule(module)
return module
}