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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2017 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package androidbootenv
import (
"bufio"
"bytes"
"fmt"
"os"
"strings"
"github.com/snapcore/snapd/logger"
"github.com/snapcore/snapd/osutil"
)
type Env struct {
// Map with key-value strings
env map[string]string
// File for environment storage
path string
}
func NewEnv(path string) *Env {
return &Env{
env: make(map[string]string),
path: path,
}
}
func (a *Env) Get(name string) string {
return a.env[name]
}
func (a *Env) Set(key, value string) {
a.env[key] = value
}
func (a *Env) Load() error {
file, err := os.Open(a.path)
if err != nil {
return err
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
l := strings.SplitN(scanner.Text(), "=", 2)
// be liberal in what you accept
if len(l) < 2 {
logger.Noticef("WARNING: bad value while parsing %v (line: %q)",
a.path, scanner.Text())
continue
}
a.env[l[0]] = l[1]
}
if err := scanner.Err(); err != nil {
return err
}
return nil
}
func (a *Env) Save() error {
var w bytes.Buffer
for k, v := range a.env {
if _, err := fmt.Fprintf(&w, "%s=%s\n", k, v); err != nil {
return err
}
}
return osutil.AtomicWriteFile(a.path, w.Bytes(), 0644, 0)
}
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