Add a TTL to the directory cache

dotlib/cattle.sh

@@ -34,11 +34,20 @@ reaper_pid=$! PROMPT_COMMAND+=(ping-timer)
 trap slay-reaper EXIT
 
 if [[ -f /tmp/iterm2-prev-dir.txt ]]; then
-  dir=$(</tmp/iterm2-prev-dir.txt)
+  cur_time=$(date +%s)
+  last_mod=$(stat -f%c /tmp/iterm2-prev-dir.txt)
 
-  if [[ -d $dir ]]; then
-    command cd "$dir"
+  if (( cur_time - last_mod > 1200 )); then
+    rm -f /tmp/iterm2-prev-dir.txt
+  else
+    dir=$(</tmp/iterm2-prev-dir.txt)
+
+    if [[ -d $dir ]]; then
+      command cd "$dir"
+    fi
+
+    unset dir
   fi
 
-  unset dir
+  unset cur_time last_mod
 fi