Hello Devs, I use Viper to handle the configuration for a REST service. DELETE/POST/PUT requests have the potential to modify the config after which I use viper.WriteConfig() to persist the changes.
My question is whether other or not there's a built-in or easy way to do a rolling history of the last X number of configs? I've looked at the docs, and I don't believe so, but wanted to reach out to double check.
MY_VARIABLE, does Viper do any kind of default rewriting (aside from lowercase) to access that value? So Get("my_variable")...? If I want it to be camelCase I'll need to SetEnvKeyReplacer, right? (Looking at viper_test.go it seems this is how it works).
Hey guys. I am not sure this is the correct place for this but....
I am using Viper to manage environment variables for a web app. It works perfectly if I run in normally....
So the web app reads a couple of values from the environment using AutomaticEnv() and a couple of calls to GetString().
If I package this up into a docker container viper will not be able to grab the env values it would if running outside the docker container. I know the environment variables are getting set. I can exec into the container see it.
I tried switching to os.Getenv(). That call is able to pull in the values.
Any ideas what's broken?
hello i have a problem when i use viper.GetString("") outside main package return nil somebody help
`package main
import (
"project/Model"
"github.com/spf13/viper"
...
)
func main() {
//Config handling
viper.SetConfigName("main")
viper.AddConfigPath("/config/")
err = viper.ReadInConfig()
...
}`
`package Model
import ("github.com/spf13/viper"
...
)
var sqlhost = viper.GetString("db.host")
func foo() {
log.Println(sqlhost)
} `
I just want to write a config with mapstructure annotations on it...
Struct:
type Person struct {
Age int `mapstructure:"a"`
Gender string `mapstructure:"g"`
Family string `mapstructure:"f"`
Name string `mapstructure:"n"`
}The write method to write a config file:
import (
"bytes"
"github.com/spf13/viper"
"gopkg.in/yaml.v2"
)
func WriteConfig(configInstance interface{}, filePath string,) error {
v := viper.New()
b, err := yaml.Marshal(&configInstance)
if err != nil {
return err
}
defaultConfig := bytes.NewReader(b)
v.SetConfigType("yaml")
if err := v.MergeConfig(defaultConfig); err != nil {
return err
}
return v.WriteConfigAs(filePath)
}The result for yaml or json is always:
{
"age": 48,
"family": "Family-Name",
"gender": "m",
"name": "Name"
}yaml
age: 48
family: Family-Name
gender: m
name: NameThe mapstructure annotation are not respected..
Do I make something wrong here???
flags.String(longOpt, defaultValue, description)
config.ViperBindPFlag(key, flags.Lookup(longOpt))
viper.SetDefault(key, defaultValue)
WithEnvPrefix("MYPREFIX") and WithAutomaticEnv(true) when loading the config. I absolutely need the env vars to have the priority over by config, but i don't know how my env var should be named, as my config is not flag, but contain array and nested key/vals.
host, my env var should be named MYPREFIX_HOST
MYPREFIX_LEVEL1_LEVEL2
RootCmd.PersistentFlags().VisitAll(func(f *pflag.Flag) {
envKey := strings.ToUpper(replacer.Replace(f.Name))
f.Usage = fmt.Sprintf("%s [env: %s]", f.Usage, envKey)
})