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- // Copyright 2021 Google LLC
- //
- // 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 mk2rbc
- import (
- "bytes"
- "fmt"
- "io/ioutil"
- "os"
- "strings"
- mkparser "android/soong/androidmk/parser"
- )
- // Extracts the list of product config variables from a file, calling
- // given registrar for each variable.
- func FindConfigVariables(mkFile string, vr variableRegistrar) error {
- mkContents, err := ioutil.ReadFile(mkFile)
- if err != nil {
- return err
- }
- parser := mkparser.NewParser(mkFile, bytes.NewBuffer(mkContents))
- nodes, errs := parser.Parse()
- if len(errs) > 0 {
- for _, e := range errs {
- fmt.Fprintln(os.Stderr, "ERROR:", e)
- }
- return fmt.Errorf("cannot parse %s", mkFile)
- }
- for _, node := range nodes {
- asgn, ok := node.(*mkparser.Assignment)
- if !ok {
- continue
- }
- // We are looking for a variable called '_product_list_vars'
- // or '_product_single_value_vars'.
- if !asgn.Name.Const() {
- continue
- }
- varName := asgn.Name.Strings[0]
- var starType starlarkType
- if varName == "_product_list_vars" {
- starType = starlarkTypeList
- } else if varName == "_product_single_value_vars" {
- starType = starlarkTypeUnknown
- } else {
- continue
- }
- for _, name := range strings.Fields(asgn.Value.Dump()) {
- vr.NewVariable(name, VarClassConfig, starType)
- }
- }
- return nil
- }
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