Support for map[string]interface{}

[dominiksimek]

Hi, current version supports decoding of environment variables into map[string]string type. It will be useful to have support also for map[string]interface{}. Following code shows that map[string]interface{} is not supported:

package main

import (
  "fmt"
  "github.com/kelseyhightower/envconfig"
  "log"
)

type Cfg struct {
  Host         string                 `yaml:"host"         envconfig:"HOST"`
  Port         int                    `yaml:"port"         envconfig:"PORT"`
  ExtraConfig1 map[string]string      `yaml:"extraConfig1" envconfig:"EXTRA_CONFIG_1"`
  ExtraConfig2 map[string]interface{} `yaml:"extraConfig2" envconfig:"EXTRA_CONFIG_2"`
}

func main() {
  var c Cfg
  if err := envconfig.Process("", &c); err != nil {
    log.Fatal(err)
  }
  fmt.Printf("%+v\n", c)
}

This program prints:

$ HOST=localhost PORT=8000 EXTRA_CONFIG_1="var1: 1, var2: 2" EXTRA_CONFIG_2="var1: 1, var2: 2" ./envcfg 
{Host:localhost Port:8000 ExtraConfig1:map[ var2: 2 var1: 1] ExtraConfig2:map[ var2:<nil> var1:<nil>]}

So values from ExtraConfig2 map are nil.

interface{} can be directly "converted" to desired type without parsing, so it will be nice to have support for this.

Thanks.

[broamski]

I'm encountering the same issue. Any advice on this?