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env.go
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env.go
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package env
import (
"fmt"
"os"
"path/filepath"
"strings"
"syscall"
)
const IP = "IP"
const Port = "PORT"
const Protocol = "PROTOCOL"
const BroadcastIP = "BROADCAST_IP"
const ClusterAddress = "CLUSTER_ADDRESS"
const IsJoin = "IS_JOIN"
const NodeID = "NODE_ID"
const NodeKey = "NODE_KEY"
var envs = []string{
IP, Port, Protocol, BroadcastIP, ClusterAddress, IsJoin, NodeID, NodeKey,
}
var (
appName = createApp()
envAppName = strings.ToUpper(appName)
)
func createApp() string {
if app, has := os.LookupEnv("APP"); has {
return app
}
app := filepath.Base(os.Args[0])
if err := os.Setenv("APP", app); err != nil {
panic(err)
}
tryReadEnv(app)
return app
}
func Envs() []string {
return envs
}
func GetEnv(name string) (string, bool) {
return syscall.Getenv(EnvName(name))
}
func GetDefault(name string, d string) string {
if v, has := GetEnv(name); has {
return v
}
return d
}
func SetEnv(name string, value string) {
os.Setenv(EnvName(name), value)
}
func GenEnv(name, value string) string {
return fmt.Sprintf("%s=%s", EnvName(name), value)
}
func EnvName(name string) string {
return createEnvName(envAppName, name)
}
func createEnvName(envName, name string) string {
return fmt.Sprintf("%s_%s", envName, name)
}
func AppName() string {
return appName
}