Cleanup, add ability to skip initial full sync

application/application.go

@@ -50,8 +50,10 @@ func (a *Application) Start(ctx context.Context, wg *sync.WaitGroup) error {
 		org = org.WithOverwrite()
 	}
 
-	if err := org.FullSync(ctx); err != nil {
-		return fmt.Errorf("full sync: %w", err)
+	if !a.config.SkipFullSync {
+		if err := org.FullSync(ctx); err != nil {
+			return fmt.Errorf("full sync: %w", err)
+		}
 	}
 
 	if a.config.Watch {

application/config.go

@@ -15,13 +15,14 @@ const (
 )
 
 type Config struct {
-	SourceDir string
-	TargetDir string
-	Mode      Mode
-	Overwrite bool
-	DirMode   uint64
-	FileMode  uint64
-	Watch     bool
+	SourceDir    string
+	TargetDir    string
+	Mode         Mode
+	Overwrite    bool
+	DirMode      uint64
+	FileMode     uint64
+	Watch        bool
+	SkipFullSync bool
 }
 
 func (c *Config) Validate() error {
@@ -37,5 +38,9 @@ func (c *Config) Validate() error {
 		return fmt.Errorf("invalid mode %s", c.Mode)
 	}
 
+	if c.SkipFullSync && !c.Watch {
+		return fmt.Errorf("skip full sync and watch disabled — nothing to do")
+	}
+
 	return nil
 }