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utils.go
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utils.go
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package utils
import (
"fmt"
"net"
"os"
"strconv"
"strings"
"github.com/spf13/viper"
)
func GetMachineIpAddress() (string, error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return "", err
}
for _, a := range addrs {
if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
if ipnet.IP.To4() != nil {
return ipnet.IP.String(), nil
}
}
}
return "", fmt.Errorf("Could not find IP address of machine")
}
func GetEnvVariableString(name string, defaultValue string) string {
listenPortEnvVariable, foundListenPortEnvVariable := os.LookupEnv(name)
if foundListenPortEnvVariable {
return listenPortEnvVariable
}
return defaultValue
}
func GetEnvVariableInt(name string, defaultValue int) int {
envVariable, foundEnvVariable := os.LookupEnv(name)
if foundEnvVariable {
value, err := strconv.Atoi(envVariable)
if err != nil {
return defaultValue
}
return value
}
return defaultValue
}
func GetEnvVariableBool(name string, defaultValue bool) bool {
listenPortEnvVariable, foundListenPortEnvVariable := os.LookupEnv(name)
if foundListenPortEnvVariable {
lowerCased := strings.ToLower(listenPortEnvVariable)
if lowerCased == "true" {
return true
} else if lowerCased == "false" {
return false
} else {
return defaultValue
}
}
return defaultValue
}
type ConfigLocation struct {
ConfigPath string `mapstructure:"CONFIG_PATH"`
ConfigName string `mapstructure:"CONFIG_NAME"`
}
func ProvideConfigLocation() *ConfigLocation {
path := os.Getenv("CONFIG_PATH")
if path == "" {
path = "."
}
name := os.Getenv("CONFIG_NAME")
return &ConfigLocation{
ConfigPath: path,
ConfigName: name,
}
}
func LoadConfigFromEnvs(config interface{}) error {
path := os.Getenv("CONFIG_PATH")
if path == "" {
path = "."
}
name := os.Getenv("CONFIG_NAME")
viper.AddConfigPath(path)
viper.SetConfigName(name)
viper.SetConfigType("env")
fmt.Println(path)
fmt.Println(name)
viper.AutomaticEnv()
err := viper.ReadInConfig()
if err != nil {
return err
}
err = viper.Unmarshal(&config)
return err
}