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config.go
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config.go
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package env
import (
"bytes"
"flag"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/ghodss/yaml"
)
const (
envConfigName = "CONFIG"
envDataDirName = "DATA_DIR"
envPidFileName = "PID_FILE"
envSocketDirName = "SOCKET_DIR"
envLogDirName = "LOG_DIR"
envExtendsDirName = "EXTENDS_DIR"
envExtenderMarkName = "EXTENDS_MARK"
envConfigNameForEnv = "ENV"
)
var (
socketSocketDirValue = ""
configPath = ""
dataDirPath = ""
pidFilePath = ""
logDirPath = ""
extendsBaseDir = ""
extendsMark = ""
)
func init() {
socketSocketDirValue = GetDefault(envSocketDirName, fmt.Sprintf("/tmp/%s", appName))
socketSocketDirValue = formatPath(socketSocketDirValue)
configPath = GetDefault(envConfigName, "config.yml")
configPath = formatPath(configPath)
dataDirPath = GetDefault(envDataDirName, fmt.Sprintf("/var/lib/%s", appName))
dataDirPath = formatPath(dataDirPath)
pidFilePath = GetDefault(envPidFileName, fmt.Sprintf("/var/run/%s", appName))
pidFilePath = formatPath(pidFilePath)
logDirPath = GetDefault(envLogDirName, fmt.Sprintf("/var/log/%s", appName))
logDirPath = formatPath(logDirPath)
extendsBaseDir = GetDefault(envExtendsDirName, fmt.Sprintf("/var/lib/%s/extends", appName))
extendsBaseDir = formatPath(extendsBaseDir)
extendsMark = GetDefault(envExtenderMarkName, "https://market.gokuapi.com")
// todo 如有必要,这里增加对 mark地址格式的校验
}
func GetConfig() map[string]string {
return map[string]string{
envSocketDirName: socketSocketDirValue,
envConfigName: configPath,
envDataDirName: dataDirPath,
envPidFileName: pidFilePath,
envLogDirName: logDirPath,
envExtendsDirName: extendsBaseDir,
envExtenderMarkName: extendsMark,
}
}
func tryReadEnv(name string) {
envValues := map[string]string{
envConfigName: fmt.Sprintf("/etc/%s/config.yml", name),
envDataDirName: fmt.Sprintf("/var/lib/%s", name),
envPidFileName: fmt.Sprintf("/var/run/%s", name),
envSocketDirName: fmt.Sprintf("/tmp/%s", name),
envLogDirName: fmt.Sprintf("/var/log/%s", name),
envExtendsDirName: fmt.Sprintf("/var/lib/%s/extends", name),
}
en := strings.ToUpper(name)
path := ""
commandline := flag.NewFlagSet(os.Args[0], flag.ContinueOnError)
commandline.Usage = func() {}
commandline.SetOutput(&bytes.Buffer{})
commandline.StringVar(&path, "env", "", "env")
commandline.Parse(os.Args[1:])
if path == "" {
path = os.Getenv(createEnvName(en, envConfigNameForEnv))
if path == "" {
path = fmt.Sprintf("/etc/%s/%s.yml", name, name)
}
}
m, err := read(path)
if err != nil {
return
}
for k, nv := range m {
key := strings.ToUpper(k)
if _, has := envValues[key]; has {
os.Setenv(fmt.Sprintf("%s_%s", en, key), nv)
}
}
}
func read(path string) (map[string]string, error) {
abs, err := filepath.Abs(path)
if err != nil {
return nil, err
}
data, err := ioutil.ReadFile(abs)
if err != nil {
return nil, err
}
m := make(map[string]string)
err = yaml.Unmarshal(data, &m)
if err != nil {
return nil, err
}
return m, nil
}
func SocketAddr(name string, pid int) string {
os.MkdirAll(socketSocketDirValue, os.FileMode(0755))
return fmt.Sprintf("%s/%s.%s-%d.sock", socketSocketDirValue, appName, name, pid)
}
func ConfigPath() string {
return configPath
}
func LogDir() string {
return logDirPath
}
func PidFileDir() string {
return pidFilePath
}
func DataDir() string {
return dataDirPath
}
func ExtendersDir() string {
return "/var/lib/goku/extends"
return extendsBaseDir
}
func ExtenderMarkAddr() string {
return extendsMark
}
func formatPath(path string) string {
if strings.HasPrefix(path, "~/") {
path = strings.TrimPrefix(path, "~/")
path = filepath.Join(Home(), path)
} else {
path, _ = filepath.Abs(path)
}
return filepath.Join(filepath.Dir(path), filepath.Base(path))
}