Suggestion: Exclude patterns GUI improvements

[geckolinux]

First of all, many thanks for Vorta, this is an extremely important tool to motivate less technical people to take advantage of the all the goodness of Borg.

The only part of the GUI that I found slightly confusing was the exclude patterns, especially after reading the link to the manual, which for a non-technical user doesn't explain clearly what exclude patterns are for or how to use them and how they differ from the other apparently similar methods for excluding certain files and/or directories from backups.

I think it would be nice for Vorta to have a few GUI exclusion improvements, while still allowing to manually type in patterns for experts who prefer that. Maybe something like:

1. A field with directories and files to be excluded, basically the inverse of the Source Folders and Files to Back Up pane. This will probably cover 95% of beginners' needs.
2. A checkbox to exclude folders with the .nobackup file.
3. A GUI way of building slightly more complex exclusion rules, similar to buildregex.com , but obviously not as comprehensive, just to cover the most common rules of files and/or directories that start with BLAH, that containBLAH anywhere in the name, or end with BLAH, with a little additional help on the use of wildcards.

Thanks a lot!

[m3nu]

I like the checkbox idea, item 2.

We probably don't have the resources to build item 3, but I'd like to have some examples for different OS.

Item 1 would be a list of absolute paths. Also possible, I think.

[m3nu]

Just noticed that Nextcloud (desktop client) comes with a nice list of default exclusions. Maybe something for Vorta to assimilate.

I agree that one simple kind of patterns would be enough.

[m3nu]

Found some more details on macOS exclusions. They work via extended attributes. I think excluding those should be implemented in Borg directly. It already processes xattrs.

https://apple.stackexchange.com/questions/25779/on-os-x-what-files-are-excluded-by-rule-from-a-time-machine-backup

[mauromol]

I also found the exclusions part of the GUI quite confusing.

First of all, it's not really clear what type of exclusion syntax should I use there: the link to documentation sends to borg documentation where ALL exclusion syntaxes are explained. So, it's not clear whether I should assume Vorta passes my exclusion rules as -e/--exclude/--exclude-from or as --pattern/--patterns-from, so whether default style is fm: or rather sh: for instance.

Partly because of this and partly because of borg itself, if I add "/home/user/mauro" as source and I specify "cache" as an exclusion rule, I would expect "/home/user/mauro/cache" to be excluded (that is: "cache" being relative to the source), but it's not the case, I must specify "/home/user/mauro/cache". As I said, this is not completely Vorta's fault, however I think that a good way to workaround this would be to provide a preview button and dialog where I can see which files will be excluded based on my current rules. I don't know if this can be done by issuing a "borg create" command with --dry-run and proper logging settings: it would be extremely useful for me!

Just an additional note: this would be even more useful due to the fact that if you proceed by trial-and-error instead, the cancel button often makes Vorta freeze due to #332 😜