feat: 优化

backup/backup.sh

@@ -562,12 +562,16 @@ smb_retention_smbclient() {
     else
         cutoff=$(date -d "-${COMMON_RETENTION_DAYS} days" +%s)
     fi
-    log "清理远端早于 ${COMMON_RETENTION_DAYS} 天的备份目录"
+    log "清理远端早于 ${COMMON_RETENTION_DAYS} 天的备份目录（cutoff=$(date -r "$cutoff" 2>/dev/null || date -d "@$cutoff" 2>/dev/null)）"
-    dbg "cutoff=$cutoff ($(date -r "$cutoff" 2>/dev/null || date -d "@$cutoff" 2>/dev/null))"
+    dbg "cutoff=$cutoff"
 
+    # 先把符合命名规范的目录列出来；用 process substitution 而不是管道，避免 while 跑在子 shell 中导致计数器丢失
     # smbclient ls 输出形如：  name   FLAGS  size  weekday mon dd hh:mm:ss yyyy
     # 目录会带 D 标志；这里直接以名字模式 + D 标志双重匹配，减少误删风险。
-    echo "$listing" | awk '$2 ~ /D/ {print $1}' | grep -E "^${COMMON_ARCHIVE_PREFIX}-[0-9]{8}-[0-9]{6}\$" | while read -r dir; do
+    local scanned=0 deleted=0 kept=0 failed=0 dir
+    while read -r dir; do
+        [[ -z "$dir" ]] && continue
+        scanned=$((scanned+1))
         local d="${dir#${COMMON_ARCHIVE_PREFIX}-}"
         d="${d%%-*}"        # YYYYmmdd
         local t="${dir##*-}" # HHMMSS
@@ -578,14 +582,28 @@ smb_retention_smbclient() {
         else
             ftime=$(date -d "$iso" +%s)
         fi
-        dbg "  远端目录 $dir -> ftime=$ftime"
+        dbg "  远端目录 $dir -> ftime=$ftime ($iso)"
         if [[ "$ftime" -lt "$cutoff" ]]; then
-            log "删除远端旧备份目录：$dir"
+            log "  删除：$dir（备份时间 $iso）"
             # 先清空目录内文件，再 rmdir
             smbclient "${args[@]}" -D "${SMB_PATH:-/}/${dir}" -c "prompt OFF; mask *; del *" >/dev/null 2>&1
-            smbclient "${args[@]}" -D "${SMB_PATH:-/}" -c "rmdir \"${dir}\"" >/dev/null 2>&1 || warn "rmdir 失败：$dir"
+            if smbclient "${args[@]}" -D "${SMB_PATH:-/}" -c "rmdir \"${dir}\"" >/dev/null 2>&1; then
+                deleted=$((deleted+1))
+            else
+                warn "  rmdir 失败：$dir"
+                failed=$((failed+1))
+            fi
+        else
+            dbg "  保留：$dir（备份时间 $iso，未到保留期）"
+            kept=$((kept+1))
+        fi
+    done < <(echo "$listing" | awk '$2 ~ /D/ {print $1}' | grep -E "^${COMMON_ARCHIVE_PREFIX}-[0-9]{8}-[0-9]{6}\$")
+
+    if [[ $scanned -eq 0 ]]; then
+        log "远端无符合命名规范的备份目录，无需清理"
+    else
+        log "清理完成：扫描 ${scanned} 个目录，删除 ${deleted}，保留 ${kept}$([[ $failed -gt 0 ]] && echo "，失败 ${failed}")"
     fi
-    done
 }
 
 run_smb() {
@@ -705,11 +723,15 @@ rclone_retention() {
     else
         cutoff=$(date -d "-${COMMON_RETENTION_DAYS} days" +%s)
     fi
-    log "清理远端早于 ${COMMON_RETENTION_DAYS} 天的备份目录"
+    log "清理远端早于 ${COMMON_RETENTION_DAYS} 天的备份目录（cutoff=$(date -r "$cutoff" 2>/dev/null || date -d "@$cutoff" 2>/dev/null)）"
     dbg "cutoff=$cutoff parent=$parent"
 
     # rclone lsf --dirs-only 输出形如 "name/"，去掉尾随斜杠后做名字匹配
-    echo "$listing" | sed 's:/$::' | grep -E "^${COMMON_ARCHIVE_PREFIX}-[0-9]{8}-[0-9]{6}\$" | while read -r dir; do
+    # 用 process substitution 而非管道，保证 while 在当前 shell 中跑，计数器不丢
+    local scanned=0 deleted=0 kept=0 failed=0 dir
+    while read -r dir; do
+        [[ -z "$dir" ]] && continue
+        scanned=$((scanned+1))
         local d="${dir#${COMMON_ARCHIVE_PREFIX}-}"
         d="${d%%-*}"        # YYYYmmdd
         local t="${dir##*-}" # HHMMSS
@@ -720,14 +742,26 @@ rclone_retention() {
         else
             ftime=$(date -d "$iso" +%s)
         fi
-        dbg "  远端目录 $dir -> ftime=$ftime"
+        dbg "  远端目录 $dir -> ftime=$ftime ($iso)"
         if [[ "$ftime" -lt "$cutoff" ]]; then
-            log "删除远端旧备份目录：$dir"
+            log "  删除：${parent}/${dir}（备份时间 $iso）"
-            if ! rclone_cmd purge "${parent}/${dir}" >/dev/null 2>&1; then
+            if rclone_cmd purge "${parent}/${dir}" >/dev/null 2>&1; then
-                warn "purge 失败：$dir"
+                deleted=$((deleted+1))
+            else
+                warn "  purge 失败：$dir"
+                failed=$((failed+1))
             fi
+        else
+            dbg "  保留：$dir（备份时间 $iso，未到保留期）"
+            kept=$((kept+1))
+        fi
+    done < <(echo "$listing" | sed 's:/$::' | grep -E "^${COMMON_ARCHIVE_PREFIX}-[0-9]{8}-[0-9]{6}\$")
+
+    if [[ $scanned -eq 0 ]]; then
+        log "远端无符合命名规范的备份目录，无需清理"
+    else
+        log "清理完成：扫描 ${scanned} 个目录，删除 ${deleted}，保留 ${kept}$([[ $failed -gt 0 ]] && echo "，失败 ${failed}")"
     fi
-    done
 }
 
 run_rclone() {