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platform.go
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platform.go
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package platform // import "v2ray.com/core/common/platform"
import (
"os"
"path/filepath"
"strconv"
"strings"
)
type EnvFlag struct {
Name string
AltName string
}
func NewEnvFlag(name string) EnvFlag {
return EnvFlag{
Name: name,
AltName: NormalizeEnvName(name),
}
}
func (f EnvFlag) GetValue(defaultValue func() string) string {
if v, found := os.LookupEnv(f.Name); found {
return v
}
if len(f.AltName) > 0 {
if v, found := os.LookupEnv(f.AltName); found {
return v
}
}
return defaultValue()
}
func (f EnvFlag) GetValueAsInt(defaultValue int) int {
useDefaultValue := false
s := f.GetValue(func() string {
useDefaultValue = true
return ""
})
if useDefaultValue {
return defaultValue
}
v, err := strconv.ParseInt(s, 10, 32)
if err != nil {
return defaultValue
}
return int(v)
}
func NormalizeEnvName(name string) string {
return strings.Replace(strings.ToUpper(strings.TrimSpace(name)), ".", "_", -1)
}
func getExecutableDir() string {
exec, err := os.Executable()
if err != nil {
return ""
}
return filepath.Dir(exec)
}
func getExecutableSubDir(dir string) func() string {
return func() string {
return filepath.Join(getExecutableDir(), dir)
}
}
func GetAssetLocation(file string) string {
const name = "v2ray.location.asset"
assetPath := NewEnvFlag(name).GetValue(getExecutableDir)
return filepath.Join(assetPath, file)
}
func GetPluginDirectory() string {
const name = "v2ray.location.plugin"
pluginDir := NewEnvFlag(name).GetValue(getExecutableSubDir("plugins"))
return pluginDir
}
func GetConfigurationPath() string {
const name = "v2ray.location.config"
configPath := NewEnvFlag(name).GetValue(getExecutableDir)
return filepath.Join(configPath, "config.json")
}