Last updated: April 13, 2026
Env Validator for Go Developers
Quick Answer
DevToolHQ's env validator works great alongside Go. Use it to quickly env validator during development, then integrate the pattern into your Go codebase using the code example below.
Use Cases in Go
- 1.Validate required env vars at application startup
- 2.Catch missing configuration before deployment
- 3.Type-check environment variable values
- 4.Provide clear error messages for missing config
Go Code Example
package main
import (
"fmt"
"os"
)
func requireEnv(keys ...string) error {
var missing []string
for _, k := range keys {
if os.Getenv(k) == "" {
missing = append(missing, k)
}
}
if len(missing) > 0 {
return fmt.Errorf("missing required env vars: %v", missing)
}
return nil
}
func main() {
if err := requireEnv("DATABASE_URL", "SECRET_KEY", "PORT"); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
dbURL := os.Getenv("DATABASE_URL")
fmt.Println("Connected to:", dbURL)
}Try the tool directly
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