syncthing/lib/locations/locations.go

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2019-02-12 06:58:24 +00:00
// Copyright (C) 2019 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package locations
import (
"fmt"
"os"
"path/filepath"
"runtime"
"strings"
"time"
"github.com/syncthing/syncthing/lib/fs"
)
type LocationEnum string
// Use strings as keys to make printout and serialization of the locations map
// more meaningful.
const (
ConfigFile LocationEnum = "config"
CertFile LocationEnum = "certFile"
KeyFile LocationEnum = "keyFile"
HTTPSCertFile LocationEnum = "httpsCertFile"
HTTPSKeyFile LocationEnum = "httpsKeyFile"
Database LocationEnum = "database"
LogFile LocationEnum = "logFile"
CsrfTokens LocationEnum = "csrfTokens"
PanicLog LocationEnum = "panicLog"
AuditLog LocationEnum = "auditLog"
GUIAssets LocationEnum = "GUIAssets"
DefFolder LocationEnum = "defFolder"
)
type BaseDirEnum string
const (
ConfigBaseDir BaseDirEnum = "config"
HomeBaseDir BaseDirEnum = "home"
)
func init() {
err := expandLocations()
if err != nil {
panic(err)
}
}
func SetBaseDir(baseDirName BaseDirEnum, path string) error {
_, ok := baseDirs[baseDirName]
if !ok {
return fmt.Errorf("unknown base dir: %s", baseDirName)
}
baseDirs[baseDirName] = filepath.Clean(path)
return expandLocations()
}
func Get(location LocationEnum) string {
return locations[location]
}
func GetBaseDir(baseDir BaseDirEnum) string {
return baseDirs[baseDir]
}
// Platform dependent directories
var baseDirs = map[BaseDirEnum]string{
ConfigBaseDir: defaultConfigDir(), // Overridden by -home flag
HomeBaseDir: homeDir(), // User's home directory, *not* -home flag
}
// Use the variables from baseDirs here
var locationTemplates = map[LocationEnum]string{
ConfigFile: "${config}/config.xml",
CertFile: "${config}/cert.pem",
KeyFile: "${config}/key.pem",
HTTPSCertFile: "${config}/https-cert.pem",
HTTPSKeyFile: "${config}/https-key.pem",
Database: "${config}/index-v0.14.0.db",
LogFile: "${config}/syncthing.log", // -logfile on Windows
CsrfTokens: "${config}/csrftokens.txt",
PanicLog: "${config}/panic-${timestamp}.log",
AuditLog: "${config}/audit-${timestamp}.log",
GUIAssets: "${config}/gui",
DefFolder: "${home}/Sync",
}
var locations = make(map[LocationEnum]string)
// expandLocations replaces the variables in the locations map with actual
// directory locations.
func expandLocations() error {
newLocations := make(map[LocationEnum]string)
for key, dir := range locationTemplates {
for varName, value := range baseDirs {
dir = strings.Replace(dir, "${"+string(varName)+"}", value, -1)
}
var err error
dir, err = fs.ExpandTilde(dir)
if err != nil {
return err
}
newLocations[key] = filepath.Clean(dir)
}
locations = newLocations
return nil
}
// defaultConfigDir returns the default configuration directory, as figured
// out by various the environment variables present on each platform, or dies
// trying.
func defaultConfigDir() string {
switch runtime.GOOS {
case "windows":
if p := os.Getenv("LocalAppData"); p != "" {
return filepath.Join(p, "Syncthing")
}
return filepath.Join(os.Getenv("AppData"), "Syncthing")
case "darwin":
dir, err := fs.ExpandTilde("~/Library/Application Support/Syncthing")
if err != nil {
panic(err)
}
return dir
default:
if xdgCfg := os.Getenv("XDG_CONFIG_HOME"); xdgCfg != "" {
return filepath.Join(xdgCfg, "syncthing")
}
dir, err := fs.ExpandTilde("~/.config/syncthing")
if err != nil {
panic(err)
}
return dir
}
}
// homeDir returns the user's home directory, or dies trying.
func homeDir() string {
home, err := fs.ExpandTilde("~")
if err != nil {
panic(err)
}
return home
}
func GetTimestamped(key LocationEnum) string {
// We take the roundtrip via "${timestamp}" instead of passing the path
// directly through time.Format() to avoid issues when the path we are
// expanding contains numbers; otherwise for example
// /home/user2006/.../panic-20060102-150405.log would get both instances of
// 2006 replaced by 2015...
tpl := locations[key]
now := time.Now().Format("20060102-150405")
return strings.Replace(tpl, "${timestamp}", now, -1)
}