making sure files are not overwritten

download.sh

@@ -15,8 +15,7 @@ SCRIPT_NAME=${0##*/}
 VERSION="1.2.2"
 
 # ------------------------------- logging & utils -------------------------------
-log()  { printf '[%s] %s
+log()  { printf '[%s] %s\n' "$(date '+%F %T%z')" "$*" >&2; }
-' "$(date '+%F %T%z')" "$*" >&2; }
 die()  { log "ERROR: $*"; exit 1; }
 need() { command -v "$1" >/dev/null 2>&1 || die "Kräver '$1' i PATH"; }
 
@@ -80,6 +79,36 @@ trap cleanup EXIT INT TERM
 OUTDIR=${OUTDIR:-$PWD}
 mkdir -p "$OUTDIR"
 
+# ---- non-overwriting target helper (added) ----
+# Ensure target filename never overwrites: foo.mp4 -> foo.1.mp4, foo.2.mp4, ...
+unique_target() {
+  local path="$1"
+  [[ ! -e "$path" ]] && { printf '%s\n' "$path"; return 0; }
+
+  local dir file base ext i candidate
+  dir=${path%/*}
+  file=${path##*/}
+
+  if [[ "$file" == *.* ]]; then
+    base=${file%.*}
+    ext=${file##*.}
+  else
+    base=$file
+    ext=""
+  fi
+
+  i=1
+  while :; do
+    if [[ -n "$ext" ]]; then
+      candidate="$dir/${base}.${i}.${ext}"
+    else
+      candidate="$dir/${base}.${i}"
+    fi
+    [[ ! -e "$candidate" ]] && { printf '%s\n' "$candidate"; return 0; }
+    ((i++))
+  done
+}
+
 # ---------------------------- idx path resolution -----------------------------
 IDX=""  # will be set via set_idx_from_url
 
@@ -237,8 +266,15 @@ download_and_save_link() {
     return 1
   fi
 
-  log "Finalizing -> $final"
+  # ---- changed: pick a non-conflicting final target ----
-  mv -f "$tmp" "$final"
+  local final_target
+  final_target=$(unique_target "$final")
+  if [[ $final_target != "$final" ]]; then
+    log "Target exists, using: $final_target"
+  fi
+
+  log "Finalizing -> $final_target"
+  mv -f "$tmp" "$final_target"
 }
 
 do_post() {