68 lines
1.8 KiB
Go
68 lines
1.8 KiB
Go
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// Copyright 2021 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package mk2rbc
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"strings"
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mkparser "android/soong/androidmk/parser"
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)
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// Extracts the list of product config variables from a file, calling
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// given registrar for each variable.
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func FindConfigVariables(mkFile string, vr variableRegistrar) error {
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mkContents, err := ioutil.ReadFile(mkFile)
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if err != nil {
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return err
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}
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parser := mkparser.NewParser(mkFile, bytes.NewBuffer(mkContents))
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nodes, errs := parser.Parse()
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if len(errs) > 0 {
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for _, e := range errs {
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fmt.Fprintln(os.Stderr, "ERROR:", e)
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}
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return fmt.Errorf("cannot parse %s", mkFile)
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}
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for _, node := range nodes {
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asgn, ok := node.(*mkparser.Assignment)
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if !ok {
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continue
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}
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// We are looking for a variable called '_product_list_vars'
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// or '_product_single_value_vars'.
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if !asgn.Name.Const() {
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continue
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}
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varName := asgn.Name.Strings[0]
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var starType starlarkType
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if varName == "_product_list_vars" {
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starType = starlarkTypeList
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} else if varName == "_product_single_value_vars" {
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starType = starlarkTypeUnknown
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} else {
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continue
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}
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for _, name := range strings.Fields(asgn.Value.Dump()) {
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vr.NewVariable(name, VarClassConfig, starType)
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}
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}
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return nil
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}
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