v0.2.5: Unicode progress bar with cloud download speed

- Unicode block progress bar (█▓░)
- Cloud downloads show ☁ with average speed (MB/s, KB/s, B/s)
- Truncated filenames with ellipsis for long names
- Error indicator (✗) in progress bar
- Simplified to serial export for clean cancel behavior
- Added IsCancelled() to Bridge interface

Makefile

@@ -1,6 +1,6 @@
 BINARY     := ./bin/photoscli
 MODULE     := gitea.k3s.k0.nu/tools/photocli
-VERSION    := 0.2.4
+VERSION    := 0.2.5
 BRIDGE_DIR := bridge
 LDFLAGS    := -X main.version=$(VERSION)
 OBJ        := $(BRIDGE_DIR)/photokit_bridge.o

cmd/photoscli/main.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"io"
 	"strings"
-	"sync"
+	"time"
 
 	"gitea.k3s.k0.nu/tools/photocli/internal/photos"
 )
@@ -294,26 +294,26 @@ func backupTree(nodes []photos.CollectionNode, outDir string, targetSize int, or
 }
 
 func exportAssets(assets []photos.Asset, outDir string, targetSize int, originals bool, total int, stderr io.Writer, bridge photos.Bridge, dirPrefix string) (int, int) {
-	if len(assets) == 0 {
-		return 0, 0
-	}
-
-	if len(assets) < 4 {
-		return exportAssetsSerial(assets, outDir, targetSize, originals, total, stderr, bridge, dirPrefix)
-	}
-
-	return exportAssetsParallel(assets, outDir, targetSize, originals, total, stderr, bridge, 3, dirPrefix)
-}
-
-func exportAssetsSerial(assets []photos.Asset, outDir string, targetSize int, originals bool, total int, stderr io.Writer, bridge photos.Bridge, dirPrefix string) (int, int) {
 	exported := 0
 	failed := 0
+	var totalBytes int64
+	var totalDur time.Duration
 	for i, a := range assets {
 		if bridge.IsCancelled() {
 			break
 		}
+		start := time.Now()
 		result, exportErr := exportOne(bridge, a, outDir, targetSize, originals, i)
-		progressBar(stderr, exported+failed+1, total, dirPrefix+result.Filename, result.Size, result.Cloud)
+		dur := time.Since(start)
+		if exportErr == nil {
+			totalBytes += result.Size
+			totalDur += dur
+		}
+		avgSpeed := float64(0)
+		if totalDur > 0 {
+			avgSpeed = float64(totalBytes) / totalDur.Seconds()
+		}
+		progressBar(stderr, exported+failed+1, total, dirPrefix+result.Filename, result.Size, result.Cloud, avgSpeed, exportErr != nil)
 		if exportErr != nil {
 			fmt.Fprintf(stderr, "\n  failed: %s: %v\n", a.Filename, exportErr)
 			failed++
@@ -324,60 +324,6 @@ func exportAssetsSerial(assets []photos.Asset, outDir string, targetSize int, or
 	return exported, failed
 }
 
-func exportAssetsParallel(assets []photos.Asset, outDir string, targetSize int, originals bool, total int, stderr io.Writer, bridge photos.Bridge, workers int, dirPrefix string) (int, int) {
-	type slot struct {
-		result photos.ExportResult
-		err    error
-		done   chan struct{}
-	}
-
-	slots := make([]slot, len(assets))
-	for i := range slots {
-		slots[i].done = make(chan struct{})
-	}
-
-	jobs := make(chan int, len(assets))
-	var wg sync.WaitGroup
-	for w := 0; w < workers; w++ {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			for i := range jobs {
-				if bridge.IsCancelled() {
-					slots[i].err = fmt.Errorf("cancelled")
-					close(slots[i].done)
-					continue
-				}
-				result, exportErr := exportOne(bridge, assets[i], outDir, targetSize, originals, i)
-				slots[i].result = result
-				slots[i].err = exportErr
-				close(slots[i].done)
-			}
-		}()
-	}
-
-	for i := range assets {
-		jobs <- i
-	}
-	close(jobs)
-
-	exported := 0
-	failed := 0
-	for i, a := range assets {
-		<-slots[i].done
-		s := slots[i]
-		progressBar(stderr, exported+failed+1, total, dirPrefix+s.result.Filename, s.result.Size, s.result.Cloud)
-		if s.err != nil {
-			fmt.Fprintf(stderr, "\n  failed: %s: %v\n", a.Filename, s.err)
-			failed++
-			continue
-		}
-		exported++
-	}
-	wg.Wait()
-	return exported, failed
-}
-
 func exportOne(bridge photos.Bridge, a photos.Asset, outDir string, targetSize int, originals bool, index int) (photos.ExportResult, error) {
 	if originals {
 		return bridge.ExportOriginal(a.ID, outDir, index)
@@ -439,15 +385,62 @@ func flagValWithDefault(args []string, name, def string) string {
 	return def
 }
 
-func progressBar(w io.Writer, current, total int, filename string, size int64, cloud string) {
+func progressBar(w io.Writer, current, total int, filename string, size int64, cloud string, avgSpeed float64, isErr bool) {
 	pct := 0
 	if total > 0 {
 		pct = current * 100 / total
 	}
-	barWidth := 30
+	barWidth := 25
 	filled := pct * barWidth / 100
-	bar := strings.Repeat("=", filled) + strings.Repeat(" ", barWidth-filled)
+	partial := (pct * barWidth % 100) * len(blockPartial) / 100
-	fmt.Fprintf(w, "\r[%s] %3d%%  %s  %s  %s", bar, pct, filename, formatSize(size), cloud)
+	bar := strings.Repeat(string(blockFull), filled)
+	if filled < barWidth {
+		if partial > 0 {
+			bar += string(blockPartial[partial])
+		}
+		bar += strings.Repeat(string(blockEmpty), barWidth-filled-1)
+	}
+	fileSize := formatSize(size)
+	cloudLabel := ""
+	if cloud == "cloud" {
+		cloudLabel = formatSpeed(avgSpeed)
+		if cloudLabel != "" {
+			cloudLabel = " " + cloudLabel
+		}
+		cloudLabel = " ☁" + cloudLabel
+	}
+	name := filename
+	maxName := 30
+	if len(name) > maxName {
+		name = "…" + name[len(name)-maxName+1:]
+	}
+	fmt.Fprintf(w, "\r%s [%s] %3d%% %s%s  %s", name, bar, pct, fileSize, cloudLabel, statusLabel(isErr))
+}
+
+var blockFull = '█'
+var blockEmpty = '░'
+var blockPartial = []rune{'▏', '▎', '▍', '▌', '▋', '▊', '▉', '█'}
+
+func statusLabel(isErr bool) string {
+	if isErr {
+		return "✗"
+	}
+	return ""
+}
+
+func formatSpeed(bytesPerSec float64) string {
+	if bytesPerSec <= 0 {
+		return ""
+	}
+	const kb = 1024
+	const mb = kb * 1024
+	if bytesPerSec >= mb {
+		return fmt.Sprintf("%.1f MB/s", bytesPerSec/mb)
+	}
+	if bytesPerSec >= kb {
+		return fmt.Sprintf("%.1f KB/s", bytesPerSec/kb)
+	}
+	return fmt.Sprintf("%.0f B/s", bytesPerSec)
 }
 
 func formatSize(bytes int64) string {
@@ -459,8 +452,11 @@ func formatSize(bytes int64) string {
 	if bytes >= mb {
 		return fmt.Sprintf("%.1f MB", float64(bytes)/float64(mb))
 	}
+	if bytes >= kb {
 		return fmt.Sprintf("%.1f KB", float64(bytes)/float64(kb))
 	}
+	return fmt.Sprintf("%d B", bytes)
+}
 
 func exportMode(originals bool) string {
 	if originals {