error handling, release builds

main.go

@@ -14,9 +14,10 @@ import (
 )
 
 const (
-	manifestUrl   = "https://updater.project-epoch.net/api/manifest"
-	configDirName = "epoch-linux"
-	configName    = "config.toml"
+	manifestUrl    = "https://updater.project-epoch.net/api/manifest"
+	defaultWowPath = "/path/to/wow"
+	configDirName  = "epoch-linux"
+	configName     = "config.toml"
 )
 
 type Config struct {
@@ -27,10 +28,10 @@ var (
 	config Config
 )
 
-func setupConfig() {
+func setupConfig() error {
 	home := os.Getenv("HOME")
 	if home == "" {
-		log.Fatal("$HOME environment variable not set")
+		return fmt.Errorf("$HOME environment variable not set")
 	}
 
 	cfgPath := filepath.Join(home, ".config", configDirName, configName)
@@ -39,18 +40,18 @@ func setupConfig() {
 		os.MkdirAll(filepath.Join(home, ".config", configDirName), 0755)
 
 		newConfig := &Config{
-			WowDir: "/path/to/wow",
+			WowDir: defaultWowPath,
 		}
 
 		file, err := os.Create(cfgPath)
 		if err != nil {
-			log.Fatal(err)
+			return err
 		}
 		defer file.Close()
 
 		encoder := toml.NewEncoder(file)
 		if err = encoder.Encode(newConfig); err != nil {
-			log.Fatal(err)
+			return err
 		}
 
 		fmt.Printf("Created new config at %s, edit it before running the launcher again\n", cfgPath)
@@ -59,12 +60,21 @@ func setupConfig() {
 
 	_, err := toml.DecodeFile(cfgPath, &config)
 	if err != nil {
-		log.Fatal(err)
+		return err
 	}
+
+	if config.WowDir == defaultWowPath {
+		return fmt.Errorf("WowDir in %s is still the default setting", cfgPath)
+	}
+
+	return nil
 }
 
 func main() {
-	setupConfig()
+	err := setupConfig()
+	if err != nil {
+		log.Fatal(err)
+	}
 
 	count, err := downloadUpdate()
 	if err != nil {