config: Create default configuration before parsing

config.go

@@ -35,31 +35,31 @@ func (t Task) Format(p *Page) (string, []byte) {
 	return t.postProcess.Format(p)
 }
 
-// LoadConfig loads the configuration from the provided path.
-func LoadConfig(path string) (*Config, error) {
+// DefaultConfig returns the default configuration.
+func DefaultConfig() *Config {
 	c := new(Config)
 	c.Feeds = make(map[string]string)
 	c.Tasks = make(map[string]*Task)
-
-	f, err := os.Open(path)
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-
-	if _, err := toml.DecodeReader(f, c); err != nil {
-		return nil, err
-	}
-
-	// Add default task
-	// The toml library overwrites the map, so add default values after parsing
-	if _, ok := c.Tasks["gemini"]; !ok {
 	c.Tasks["gemini"] = &Task{
 		Input:       ".gmi",
 		Output:      ".gmi",
 		Template:    ".gmi",
 		Destination: "public",
 	}
+	return c
+}
+
+// LoadConfig loads the configuration from the provided path.
+func LoadConfig(path string) (*Config, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	c := DefaultConfig()
+	if _, err := toml.DecodeReader(f, c); err != nil {
+		return nil, err
 	}
 
 	for _, task := range c.Tasks {