init & dev commands woo

main.go

@@ -224,9 +224,12 @@ func runInit() error {
 	if err := os.MkdirAll(targetDir, 0o755); err != nil {
 		return err
 	}
+	if err := os.WriteFile(filepath.Join(targetDir, ".keep"), []byte{}, 0o644); err != nil {
+		return err
+	}
 
 	binaryPath := filepath.Join(targetDir, pocketbaseBinaryName(runtime.GOOS))
-	if err := downloadPocketbase(defaultPocketbaseVersion, runtime.GOOS, runtime.GOARCH, binaryPath); err != nil {
+	if err := ensurePocketbaseBinary(defaultPocketbaseVersion, runtime.GOOS, runtime.GOARCH, binaryPath); err != nil {
 		return err
 	}
 
@@ -245,8 +248,8 @@ func runDev() error {
 	}
 
 	binaryPath := filepath.Join(cwd, "bin", pocketbaseBinaryName(runtime.GOOS))
-	if _, err := os.Stat(binaryPath); err != nil {
+	if err := ensurePocketbaseBinary(defaultPocketbaseVersion, runtime.GOOS, runtime.GOARCH, binaryPath); err != nil {
-		return fmt.Errorf("cannot find PocketBase binary at %s: %w", binaryPath, err)
+		return err
 	}
 
 	overrides, err := loadEnv(filepath.Join(cwd, ".env"))
@@ -337,7 +340,8 @@ func downloadPocketbase(version, goos, goarch, dest string) error {
 	defer os.Remove(tmpFile.Name())
 	defer tmpFile.Close()
 
-	if _, err := io.Copy(tmpFile, resp.Body); err != nil {
+	label := fmt.Sprintf("Downloading PocketBase v%s (%s/%s)", version, goos, goarch)
+	if err := downloadWithProgress(tmpFile, resp.Body, resp.ContentLength, label); err != nil {
 		return err
 	}
 
@@ -348,6 +352,73 @@ func downloadPocketbase(version, goos, goarch, dest string) error {
 	return os.Chmod(dest, 0o755)
 }
 
+func ensurePocketbaseBinary(version, goos, goarch, dest string) error {
+	if _, err := os.Stat(dest); err == nil {
+		return nil
+	} else if !errors.Is(err, os.ErrNotExist) {
+		return err
+	}
+
+	fmt.Println("PocketBase binary missing; downloading...")
+	return downloadPocketbase(version, goos, goarch, dest)
+}
+
+func downloadWithProgress(dst io.Writer, src io.Reader, total int64, label string) error {
+	const chunkSize = 32 * 1024
+	buf := make([]byte, chunkSize)
+	var downloaded int64
+	lastPercent := int64(-1)
+
+	updateProgress := func(force bool) {
+		if total > 0 {
+			percent := downloaded * 100 / total
+			if force || percent != lastPercent {
+				fmt.Printf("\r%s %3d%%", label, percent)
+				lastPercent = percent
+			}
+		} else {
+			fmt.Printf("\r%s %s downloaded", label, formatBytes(downloaded))
+		}
+	}
+
+	for {
+		n, err := src.Read(buf)
+		if n > 0 {
+			if _, writeErr := dst.Write(buf[:n]); writeErr != nil {
+				fmt.Println()
+				return writeErr
+			}
+			downloaded += int64(n)
+			updateProgress(false)
+		}
+
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			fmt.Println()
+			return err
+		}
+	}
+
+	updateProgress(true)
+	fmt.Println()
+	return nil
+}
+
+func formatBytes(b int64) string {
+	const unit = 1024
+	if b < unit {
+		return fmt.Sprintf("%d B", b)
+	}
+	div, exp := int64(unit), 0
+	for n := b / unit; n >= unit; n /= unit {
+		div *= unit
+		exp++
+	}
+	return fmt.Sprintf("%.1f %cB", float64(b)/float64(div), "KMGTPE"[exp])
+}
+
 func releaseAssetURL(version, goos, goarch string) (string, string, error) {
 	osName := map[string]string{
 		"darwin":  "darwin",