first working version

main.go

@@ -0,0 +1,88 @@
+package main
+
+import (
+	"fmt"
+	"io/fs"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+)
+
+const touchedFile = ".touched"
+
+var touched = loadTouched()
+
+var wg sync.WaitGroup
+
+var imageExts = map[string]bool{
+	".jpeg": true,
+	".jpg":  true,
+	".png":  true,
+	".gif":  true,
+	".bmp":  true,
+	".tiff": true,
+	".tif":  true,
+	".webp": true,
+}
+
+func main() {
+	err := filepath.WalkDir(".", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+		if d.IsDir() {
+			return nil
+		}
+
+		ext := strings.ToLower(filepath.Ext(path))
+		switch {
+		case ext == ".mov":
+			wg.Go(func() {
+				ConvertVideo(path)
+			})
+		case imageExts[ext]:
+			if touched[path] {
+				fmt.Printf("Skipping %s (already touched)\n", path)
+				return nil
+			}
+			wg.Go(func() { OptimizeImage(path) })
+		}
+		return nil
+	})
+
+	wg.Wait()
+
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func loadTouched() map[string]bool {
+	set := map[string]bool{}
+	data, err := os.ReadFile(touchedFile)
+	if err != nil {
+		return set
+	}
+	for _, line := range strings.Split(string(data), "\n") {
+		line = strings.TrimSpace(line)
+		if line != "" && !set[line] {
+			set[line] = true
+		}
+	}
+	return set
+}
+
+func markTouched(path string) {
+	f, err := os.OpenFile(touchedFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		fmt.Printf("Error updating %s: %v\n", touchedFile, err)
+		return
+	}
+	defer f.Close()
+
+	if _, err := fmt.Fprintln(f, path); err == nil {
+		touched[path] = true
+	}
+}