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69 lines
1.8 KiB
69 lines
1.8 KiB
6 years ago
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// Package env get env & app config, all the public field must after init()
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// finished and flag.Parse().
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package env
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import (
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"flag"
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"os"
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)
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// deploy env.
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const (
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DeployEnvDev = "dev"
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DeployEnvFat = "fat"
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DeployEnvUat = "uat"
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DeployEnvPre = "pre"
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DeployEnvProd = "prod"
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)
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// env default value.
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const (
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// env
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_region = "region01"
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_zone = "zone01"
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_deployEnv = "dev"
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)
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// env configuration.
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var (
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// Region avaliable region where app at.
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Region string
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// Zone avaliable zone where app at.
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Zone string
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// Hostname machine hostname.
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Hostname string
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// DeployEnv deploy env where app at.
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DeployEnv string
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// AppID is global unique application id, register by service tree.
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// such as main.arch.disocvery.
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AppID string
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// Color is the identification of different experimental group in one caster cluster.
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Color string
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)
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func init() {
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var err error
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if Hostname, err = os.Hostname(); err != nil || Hostname == "" {
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Hostname = os.Getenv("HOSTNAME")
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}
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addFlag(flag.CommandLine)
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}
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func addFlag(fs *flag.FlagSet) {
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// env
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fs.StringVar(&Region, "region", defaultString("REGION", _region), "avaliable region. or use REGION env variable, value: sh etc.")
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fs.StringVar(&Zone, "zone", defaultString("ZONE", _zone), "avaliable zone. or use ZONE env variable, value: sh001/sh002 etc.")
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fs.StringVar(&AppID, "appid", os.Getenv("APP_ID"), "appid is global unique application id, register by service tree. or use APP_ID env variable.")
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fs.StringVar(&DeployEnv, "deploy.env", defaultString("DEPLOY_ENV", _deployEnv), "deploy env. or use DEPLOY_ENV env variable, value: dev/fat1/uat/pre/prod etc.")
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fs.StringVar(&Color, "deploy.color", os.Getenv("DEPLOY_COLOR"), "deploy.color is the identification of different experimental group.")
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}
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func defaultString(env, value string) string {
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v := os.Getenv(env)
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if v == "" {
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return value
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}
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return v
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}
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