988414c2cf
This relands I12a0f907753fefd1997ab8b4ea2ac331234093cf along with a fix to blueprint for absolute paths. Store the current working directory and then change to the root directory so that all file accesses must go through helpers in the android package that properly track dependencies. Change-Id: I24ac485677aa102eec1a2521d16820da6ee1ae77 Fixes: 146437378 Test: m checkbuild Test: m OUT_DIR=/tmp/out nothing
92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
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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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// env implements the environment JSON file handling for the soong_env command line tool run before
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// the builder and for the env writer in the builder.
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package env
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"sort"
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)
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type envFileEntry struct{ Key, Value string }
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type envFileData []envFileEntry
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func EnvFileContents(envDeps map[string]string) ([]byte, error) {
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contents := make(envFileData, 0, len(envDeps))
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for key, value := range envDeps {
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contents = append(contents, envFileEntry{key, value})
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}
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sort.Sort(contents)
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data, err := json.MarshalIndent(contents, "", " ")
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if err != nil {
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return nil, err
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}
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data = append(data, '\n')
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return data, nil
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}
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func StaleEnvFile(filename string) (bool, error) {
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data, err := ioutil.ReadFile(filename)
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if err != nil {
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return true, err
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}
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var contents envFileData
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err = json.Unmarshal(data, &contents)
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if err != nil {
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return true, err
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}
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var changed []string
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for _, entry := range contents {
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key := entry.Key
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old := entry.Value
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cur := os.Getenv(key)
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if old != cur {
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changed = append(changed, fmt.Sprintf("%s (%q -> %q)", key, old, cur))
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}
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}
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if len(changed) > 0 {
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fmt.Printf("environment variables changed value:\n")
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for _, s := range changed {
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fmt.Printf(" %s\n", s)
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}
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return true, nil
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}
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return false, nil
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}
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func (e envFileData) Len() int {
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return len(e)
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}
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func (e envFileData) Less(i, j int) bool {
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return e[i].Key < e[j].Key
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}
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func (e envFileData) Swap(i, j int) {
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e[i], e[j] = e[j], e[i]
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}
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