Option to filter-out entire ANSI escape sequences for `qrexec-client(-vm)` and/or `qvm-run`

[alimirjamali]

How to file a helpful issue

The problem you're addressing (if any)

The current existing code of libqrexec-utils/do_replace_chars merely replaces escape characters with underline. This is problematic for the programs which do not have the option/configuration for avoiding ANSI escape sequences. Most specifically text coloring and graphic rendition sequences. Just filtering the escape character and not the entire sequence renders the output hard to read/parse.

One of the examples is DNF5 which will be the default in Fedora 41 (discussed here on forum)

The solution you'd like

Either improving the existing -t, -T, --filter-escape-chars* options to filter-out the entire known sequences instead of just replacing the escape character with underline. Or introducing new options for proper filtering.

The value to a user, and who that user might be

• Users will not require to learn/specify plain-text output option for individual programs (if applicable) and could use a generic option for all.
• Without this option, qubes-dom0-update output in R4.3 will be bad (the only existing alternative is to disable the progress bar).

Completion criteria checklist

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