compute server file sync breaks when filename starts with "--" #8635
Description
Report: "Error
calling remote function 'sync': Error: XXX Sync failed 3 in a row. FIX THE PROBLEM, THEN CLEAR THIS ERROR TO RESUME SYNC. -- command ''find' (args=--PREP Interact Quickstart.sagews 2015-06-06-214141.sage 2016-12-30-153612.xsl 2017-09-20-204548.ipynb 2021-01-14-125321.sagews 2021-05-03-132909.ipynb 2023-11-23-231407.ipynb 2024-08-11-144419.term 2024-08-11-163448.term 2024-….html triangle_quad2.sagews utilities.sagews -not -readable -prune -o -not -path scratch -not -path scratch/* -printf %p\0%.10T@ %.10A@ %b %s %M\0\0)' exited with nonzero code 1 -- stderr='find: unknown predicate `--PREP Interact Quickstart.sagews' '"
Note the filename "--PREP Interact Quickstart.sagews". The user deleted that file, and the problem went away.
This will definitely be fixed in cocalc2 (#8453) which takes a different approach to sync.