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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"
"path/filepath"
"strings"
mkparser "android/soong/androidmk/parser"
)
// Implements mkparser.Scope, to be used by mkparser.Value.Value()
type localDirEval struct {
localDir string
hasErrors bool
}
func (l *localDirEval) Get(name string) string {
if name == "LOCAL_DIR" {
return l.localDir
}
l.hasErrors = true
return fmt.Sprintf("$(%s)", name)
}
func (l *localDirEval) Set(_, _ string) {
}
func (l *localDirEval) Call(_ string, _ []string) []string {
l.hasErrors = true
return []string{"$(call ...)"}
}
func (l *localDirEval) SetFunc(_ string, _ func([]string) []string) {
}
// UpdateProductConfigMap builds product configuration map.
// The product configuration map maps a product name (i.e., the value of the
// TARGET_PRODUCT variable) to the top-level configuration file.
// In the Android's Make-based build machinery, the equivalent of the
// product configuration map is $(PRODUCT_MAKEFILES), which is the list
// of <product>:<configuration makefile> pairs (if <product>: is missing,
// <product> is the basename of the configuration makefile).
// UpdateProductConfigMap emulates this build logic by processing the
// assignments to PRODUCT_MAKEFILES in the file passed to it.
func UpdateProductConfigMap(configMap map[string]string, configMakefile string) error {
contents, err := ioutil.ReadFile(configMakefile)
if err != nil {
return err
}
parser := mkparser.NewParser(configMakefile, bytes.NewBuffer(contents))
nodes, errs := parser.Parse()
if len(errs) > 0 {
for _, e := range errs {
fmt.Fprintln(os.Stderr, "ERROR:", e)
}
return fmt.Errorf("cannot parse %s", configMakefile)
}
ldEval := &localDirEval{localDir: filepath.Dir(configMakefile)}
for _, node := range nodes {
// We are interested in assignments to 'PRODUCT_MAKEFILES'
asgn, ok := node.(*mkparser.Assignment)
if !ok {
continue
}
if !(asgn.Name.Const() && asgn.Name.Strings[0] == "PRODUCT_MAKEFILES") {
continue
}
// Resolve the references to $(LOCAL_DIR) in $(PRODUCT_MAKEFILES).
ldEval.hasErrors = false
value := asgn.Value.Value(ldEval)
if ldEval.hasErrors {
return fmt.Errorf("cannot evaluate %s", asgn.Value.Dump())
}
// Each item is either <product>:<configuration makefile>, or
// just <configuration makefile>
for _, token := range strings.Fields(value) {
var product, config_path string
if n := strings.Index(token, ":"); n >= 0 {
product = token[0:n]
config_path = token[n+1:]
} else {
config_path = token
product = filepath.Base(config_path)
product = strings.TrimSuffix(product, filepath.Ext(product))
}
configMap[product] = config_path
}
}
return nil
}
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