Busk at 15:05, 17 February 2023

2023-02-17T15:05:29Z

Busk: Created page with "https://dev.to/craicoverflow/a-no-nonsense-guide-to-environment-variables-in-go-a2f ``` package config import ( "os" "strconv" "strings" ) type GitHubConfig stru..."

2023-02-17T15:03:14Z

Created page with "https://dev.to/craicoverflow/a-no-nonsense-guide-to-environment-variables-in-go-a2f ``` package config import ( "os" "strconv" "strings" ) type GitHubConfig stru..."

New page

https://dev.to/craicoverflow/a-no-nonsense-guide-to-environment-variables-in-go-a2f
```
package config

import (
"os"
"strconv"
"strings"
)

type GitHubConfig struct {
Username string
APIKey string
}

type Config struct {
GitHub GitHubConfig
DebugMode bool
UserRoles []string
MaxUsers int
}

// New returns a new Config struct
func New() *Config {
return &Config{
GitHub: GitHubConfig{
Username: getEnv("GITHUB_USERNAME", ""),
APIKey: getEnv("GITHUB_API_KEY", ""),
},
DebugMode: getEnvAsBool("DEBUG_MODE", true),
UserRoles: getEnvAsSlice("USER_ROLES", []string{"admin"}, ","),
MaxUsers: getEnvAsInt("MAX_USERS", 1),
}
}

// Simple helper function to read an environment or return a default value
func getEnv(key string, defaultVal string) string {
if value, exists := os.LookupEnv(key); exists {
return value
}

return defaultVal
}

// Simple helper function to read an environment variable into integer or return a default value
func getEnvAsInt(name string, defaultVal int) int {
valueStr := getEnv(name, "")
if value, err := strconv.Atoi(valueStr); err == nil {
return value
}

return defaultVal
}

// Helper to read an environment variable into a bool or return default value
func getEnvAsBool(name string, defaultVal bool) bool {
valStr := getEnv(name, "")
if val, err := strconv.ParseBool(valStr); err == nil {
return val
}

return defaultVal
}

// Helper to read an environment variable into a string slice or return default value
func getEnvAsSlice(name string, defaultVal []string, sep string) []string {
valStr := getEnv(name, "")

if valStr == "" {
return defaultVal
}

val := strings.Split(valStr, sep)

return val
}
```

← Older revision		Revision as of 15:05, 17 February 2023
Line 1:		Line 1:
		+
		+	https://stackoverflow.com/questions/40326540/how-to-assign-default-value-if-env-var-is-empty
		+
	https://dev.to/craicoverflow/a-no-nonsense-guide-to-environment-variables-in-go-a2f		https://dev.to/craicoverflow/a-no-nonsense-guide-to-environment-variables-in-go-a2f
	```		```

Go env defaults - Revision history

Busk at 15:05, 17 February 2023

Busk: Created page with "https://dev.to/craicoverflow/a-no-nonsense-guide-to-environment-variables-in-go-a2f ``` package config import ( "os" "strconv" "strings" ) type GitHubConfig stru..."