rclone filters to support regex

[asdffdsazqqq]

The associated forum post URL from https://forum.rclone.org

https://forum.rclone.org/t/full-support-for-regex-for-filters/26883

What is your current rclone version (output from rclone version)?

rclone v1.56.0
- os/version: Microsoft Windows 10 Pro 2009 (64 bit)
- os/kernel: 10.0.19043.1266 (x86_64)
- os/type: windows
- os/arch: amd64
- go/version: go1.16.5
- go/linking: dynamic
- go/tags: cmount

What problem are you are trying to solve?

that rclone should fully support regex for filters
currently, rclone partially supports regex

this works

rclone ls D:\files\reg --include={\d\d\d\d\d\d\d\d} --dump=filters 
2021/10/07 17:41:21 NOTICE: Automatically setting -vv as --dump is enabled
--- start filters ---
--- File filter rules ---
+ (^|/)(\d\d\d\d\d\d\d\d)$
- ^.*$
--- Directory filter rules ---
+ ^.*$
- ^.*$
--- end filters ---
2021/10/07 17:41:21 DEBUG : rclone: Version "v1.56.0" starting with parameters ["c:\\data\\rclone\\scripts\\rclone.exe" "ls" "D:\\files\\reg" "--include={\\d\\d\\d\\d\\d\\d\\d\\d}" "--dump=filters"]
2021/10/07 17:41:21 DEBUG : Creating backend with remote "D:\\files\\reg"
2021/10/07 17:41:21 DEBUG : Using config file from "C:\\data\\rclone\\scripts\\rclone.conf"
2021/10/07 17:41:21 DEBUG : fs cache: renaming cache item "D:\\files\\reg" to be canonical "//?/D:/files/reg"
        0 20210101
        0 20210102
        0 20210103
2021/10/07 17:41:21 DEBUG : 2 go routines active

but this does not work

rclone ls D:\files\reg --include=*.{\d{8}}  --dump=filters 
2021/10/07 17:37:47 NOTICE: Automatically setting -vv as --dump is enabled
2021/10/07 17:37:47 Failed to load filters: can't nest '{' '}' in glob "*.{\\d{8}}"

How do you think rclone should be changed to solve that?

please allow for full regex functionality. thanks

[darthShadow]

Duplicate of #4074

[ncw]

I just wrote some ideas of how this could be implemented on the original issue #4074 (comment)

Comments there please @asdffdsazqqq and @darthShadow if you are interested!

[darthShadow]

Closing to keep all relevant discussion confined in a single issue.