config

Config example

you can set config by (descending order by priority)

• Command Line Arguments
• YAML file
• Environment Variables

Command Line Arguments

$ go run ./golib-config.go -h


Usage:
  golibConfig [flags]

Golib examples flags:

      --city string
                city (default "beijing")
      --phone string
                phone number
      --user-age int
                user age
      --user-name string
                user name (default "yubo")

Global flags:
...

default setting

$ go run ./golib-config.go
city: beijing
phone: ""
userAge: 0
userName: yubo
I1104 14:22:08.374445   22053 proc.go:275] See ya!

• use --city

$ go run ./golib-config.go ./golib-config.go --city NewYork --user-name tom
city: NewYork
phone: ""
userAge: 0
userName: tom
I1104 14:24:35.979256   22733 proc.go:275] See ya!

• use --set-string as yaml.path

$go run ./golib-config.go  --set-string=golibConfig.city=wuhan --set-string=golibConfig.userName=yubo
city: wuhan
phone: ""
userAge: 0
userName: yubo
I1104 15:11:54.053312   54259 proc.go:275] See ya!

YAML file

• config.yaml

golibConfig:
  userName: bajie
  userAge: 16
  city: gao
  phone: 14159265359

$ go run ./golib-config.go -f ./config.yaml
city: gao
phone: "14159265359"
userAge: 16
userName: bajie
I1104 14:18:54.172979   21185 proc.go:275] See ya!

Environment Variables

$ USER_NAME=wukong USER_CITY="Flowers and Fruit Mountain" go run ./golib-config.go
city: Flowers and Fruit Mountain
phone: ""
userAge: 0
userName: wukong
I1104 15:30:33.678388   60856 proc.go:275] See ya!