fixes #1539

Author: jph00

nbdev/cli.py

@@ -188,7 +188,12 @@ def watch_export(nbs:str=None, # Nb directory to watch for changes
     def _export(e,lib=lib):
         p = e.src_path
         if (not '.ipynb_checkpoints' in p and p.endswith('.ipynb') and not Path(p).name.startswith('.~')):
-            if e.event_type == 'modified': run(f'nb_export --lib_path {lib} "{p}"')
+            if e.event_type == 'modified':
+                time.sleep(0.1)
+                try: run(f'nb_export --lib_path {lib} "{p}"')
+                except IOError:
+                    time.sleep(0.3)
+                    run(f'nb_export --lib_path {lib} "{p}"')
     with fs_watchdog(_export, nbs):
         while True: time.sleep(1)
 

nbs/api/13_cli.ipynb

@@ -330,7 +330,12 @@
     "    def _export(e,lib=lib):\n",
     "        p = e.src_path\n",
     "        if (not '.ipynb_checkpoints' in p and p.endswith('.ipynb') and not Path(p).name.startswith('.~')):\n",
-    "            if e.event_type == 'modified': run(f'nb_export --lib_path {lib} \"{p}\"')\n",
+    "            if e.event_type == 'modified':\n",
+    "                time.sleep(0.1)\n",
+    "                try: run(f'nb_export --lib_path {lib} \"{p}\"')\n",
+    "                except IOError:\n",
+    "                    time.sleep(0.3)\n",
+    "                    run(f'nb_export --lib_path {lib} \"{p}\"')\n",
     "    with fs_watchdog(_export, nbs):\n",
     "        while True: time.sleep(1)"
    ]