Add env loading

.gitignore

@@ -1 +1,2 @@
 steamcmd
+.env

go.mod

@@ -1,3 +1,5 @@
 module steamcmd-api
 
 go 1.23.0
+
+require github.com/joho/godotenv v1.5.1

go.sum

@@ -0,0 +1,2 @@
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=

main.go

@@ -7,6 +7,8 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+
+	"github.com/joho/godotenv"
 )
 
 var Error *log.Logger
@@ -25,6 +27,11 @@ func init() {
 		log.Lmicroseconds|log.Lshortfile)
 }
 
+const (
+	steamcmdEnvKey = "STEAMCMD"
+	appEnvKey      = "APP"
+)
+
 func main() {
 	envfile := flag.String("envfile", ".env", "")
 	flag.Parse()
@@ -34,7 +41,22 @@ func main() {
 		Error.Printf("Error leading env file: %v", err)
 		return
 	}
-	log.Printf("%#v", env)
+
+	steamcmdexe, ok := env[steamcmdEnvKey]
+	if !ok {
+		Error.Printf("SteamCMD not found in env, please specify %s", steamcmdEnvKey)
+		return
+	}
+
+	app, ok := env[appEnvKey]
+	if !ok {
+		Error.Printf("App not found in env, please specify %s", appEnvKey)
+		return
+	}
+
+	args := flag.Args()
+	log.Printf("Using steamcmd at %s", steamcmdexe)
+	log.Printf("Downloading %d items for %s", len(args), app)
 }
 
 func loadEnv(fpath string) (map[string]string, error) {
@@ -43,5 +65,16 @@ func loadEnv(fpath string) (map[string]string, error) {
 	fpath = filepath.Clean(fpath)
 	log.Printf("Trying to open env file at %s", fpath)
 
+	file, err := os.Open(fpath)
+	if err != nil {
+		return res, fmt.Errorf("error opening env file: %w", err)
+	}
+	defer file.Close()
+
+	res, err = godotenv.Parse(file)
+	if err != nil {
+		return res, fmt.Errorf("error parsing env file: %w", err)
+	}
+
 	return res, nil
 }