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// Copyright (C) 2021 The Android Open Source Project
//
// 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 aidl
import (
"android/soong/android"
"fmt"
"strings"
"github.com/google/blueprint"
"github.com/google/blueprint/proptools"
)
var (
aidlMetadataRule = pctx.StaticRule("aidlMetadataRule", blueprint.RuleParams{
Command: `rm -f ${out} && { ` +
`echo '{' && ` +
`echo "\"name\": \"${name}\"," && ` +
`echo "\"stability\": \"${stability}\"," && ` +
`echo "\"types\": [${types}]," && ` +
`echo "\"hashes\": [${hashes}]," && ` +
`echo "\"has_development\": ${has_development}," && ` +
`echo "\"versions\": [${versions}]" && ` +
`echo '}' ` +
`;} >> ${out}`,
Description: "AIDL metadata: ${out}",
}, "name", "stability", "types", "hashes", "has_development", "versions")
joinJsonObjectsToArrayRule = pctx.StaticRule("joinJsonObjectsToArrayRule", blueprint.RuleParams{
Rspfile: "$out.rsp",
RspfileContent: "$files",
Command: "rm -rf ${out} && " +
// Start the output array with an opening bracket.
"echo '[' >> ${out} && " +
// Append each input file and a comma to the output.
"for file in $$(cat ${out}.rsp); do " +
"cat $$file >> ${out}; echo ',' >> ${out}; " +
"done && " +
// Remove the last comma, replacing it with the closing bracket.
"sed -i '$$d' ${out} && echo ']' >> ${out}",
Description: "Joining JSON objects into array ${out}",
}, "files")
)
func init() {
android.RegisterModuleType("aidl_interfaces_metadata", aidlInterfacesMetadataSingletonFactory)
}
func aidlInterfacesMetadataSingletonFactory() android.Module {
i := &aidlInterfacesMetadataSingleton{}
android.InitAndroidModule(i)
return i
}
type aidlInterfacesMetadataSingleton struct {
android.ModuleBase
metadataPath android.WritablePath
}
var _ android.OutputFileProducer = (*aidlInterfacesMetadataSingleton)(nil)
func (m *aidlInterfacesMetadataSingleton) GenerateAndroidBuildActions(ctx android.ModuleContext) {
if m.Name() != aidlMetadataSingletonName {
ctx.PropertyErrorf("name", "must be %s", aidlMetadataSingletonName)
return
}
type ModuleInfo struct {
Stability string
ComputedTypes []string
HashFiles []string
HasDevelopment android.WritablePath
Versions []string
}
// name -> ModuleInfo
moduleInfos := map[string]ModuleInfo{}
ctx.VisitDirectDeps(func(m android.Module) {
if !m.ExportedToMake() {
return
}
switch t := m.(type) {
case *aidlInterface:
info := moduleInfos[t.ModuleBase.Name()]
info.Stability = proptools.StringDefault(t.properties.Stability, "")
info.ComputedTypes = t.computedTypes
info.Versions = t.getVersions()
moduleInfos[t.ModuleBase.Name()] = info
case *aidlGenRule:
info := moduleInfos[t.properties.BaseName]
if t.hashFile != nil {
info.HashFiles = append(info.HashFiles, t.hashFile.String())
}
moduleInfos[t.properties.BaseName] = info
case *aidlApi:
info := moduleInfos[t.properties.BaseName]
info.HasDevelopment = t.hasDevelopment
moduleInfos[t.properties.BaseName] = info
}
})
var metadataOutputs android.Paths
for _, name := range android.SortedKeys(moduleInfos) {
info := moduleInfos[name]
metadataPath := android.PathForModuleOut(ctx, "metadata_"+name)
metadataOutputs = append(metadataOutputs, metadataPath)
// There is one aidlGenRule per-version per-backend. If we had
// objects per version and sub-objects per backend, we could
// avoid needing to filter out duplicates.
info.HashFiles = android.FirstUniqueStrings(info.HashFiles)
readHashes := ""
if len(info.HashFiles) > 0 {
readHashes = "$$(sed 's/.*/\"&\",/' " + strings.Join(info.HashFiles, " ") +
"| tr '\\n' ' ' | sed 's/, $$//')"
}
implicits := android.PathsForSource(ctx, info.HashFiles)
hasDevelopmentValue := "true"
if info.HasDevelopment != nil {
hasDevelopmentValue = "$$(if [ \"$$(cat " + info.HasDevelopment.String() +
")\" = \"1\" ]; then echo true; else echo false; fi)"
}
ctx.Build(pctx, android.BuildParams{
Rule: aidlMetadataRule,
Implicits: implicits,
Input: info.HasDevelopment,
Output: metadataPath,
Args: map[string]string{
"name": name,
"stability": info.Stability,
"types": strings.Join(wrap(`\"`, info.ComputedTypes, `\"`), ", "),
"hashes": readHashes,
"has_development": hasDevelopmentValue,
"versions": strings.Join(info.Versions, ", "),
},
})
}
m.metadataPath = android.PathForModuleOut(ctx, "aidl_metadata.json")
ctx.Build(pctx, android.BuildParams{
Rule: joinJsonObjectsToArrayRule,
Inputs: metadataOutputs,
Output: m.metadataPath,
Args: map[string]string{
"files": strings.Join(metadataOutputs.Strings(), " "),
},
})
}
func (m *aidlInterfacesMetadataSingleton) OutputFiles(tag string) (android.Paths, error) {
if tag != "" {
return nil, fmt.Errorf("unsupported tag %q", tag)
}
return android.Paths{m.metadataPath}, nil
}
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