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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.
package genrule
import (
"path/filepath"
"github.com/google/blueprint"
"github.com/google/blueprint/pathtools"
"android/soong/common"
)
var (
pctx = blueprint.NewPackageContext("android/soong/genrule")
)
func init() {
pctx.VariableConfigMethod("srcDir", common.Config.SrcDir)
}
type SourceFileGenerator interface {
GeneratedSourceFiles() []string
}
type genSrcsProperties struct {
// cmd: command to run on each input file. Available variables for substitution:
// $in: an input file
// $out: the corresponding output file
// $srcDir: the root directory of the source tree
Cmd string
// srcs: list of input files
Srcs []string
// output_extension: extension that will be substituted for each output file
Output_extension string
}
func GenSrcsFactory() (blueprint.Module, []interface{}) {
module := &genSrcs{}
return common.InitAndroidModule(module, &module.properties)
}
type genSrcs struct {
common.AndroidModuleBase
properties genSrcsProperties
outputFiles []string
}
func (g *genSrcs) GenerateAndroidBuildActions(ctx common.AndroidModuleContext) {
rule := ctx.Rule(pctx, "genSrcs", blueprint.RuleParams{
Command: g.properties.Cmd,
})
srcFiles := common.ExpandSources(ctx, g.properties.Srcs)
g.outputFiles = make([]string, 0, len(srcFiles))
for _, in := range srcFiles {
out := pathtools.ReplaceExtension(in, g.properties.Output_extension)
out = filepath.Join(common.ModuleGenDir(ctx), out)
g.outputFiles = append(g.outputFiles, out)
ctx.Build(pctx, blueprint.BuildParams{
Rule: rule,
Inputs: []string{in},
Outputs: []string{out},
// TODO: visit dependencies to add implicit dependencies on required tools
})
}
}
var _ SourceFileGenerator = (*genSrcs)(nil)
func (g *genSrcs) GeneratedSourceFiles() []string {
return g.outputFiles
}
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