[Bug 507292] New: [RFE] Allow wildcards/regexps in rpm deps

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Summary: [RFE] Allow wildcards/regexps in rpm deps

https://bugzilla.redhat.com/show_bug.cgi?id=507292

           Summary: [RFE] Allow wildcards/regexps in rpm deps
           Product: Fedora
           Version: rawhide
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: medium
          Priority: low
         Component: rpm
        AssignedTo: pmatilai(a)redhat.com
        ReportedBy: nicolas.mailhot(a)laposte.net
         QAContact: extras-qa(a)fedoraproject.org
                CC: pmatilai(a)redhat.com, jnovy(a)redhat.com,
                    ffesti(a)redhat.com, fedora-fonts-bugs-list(a)redhat.com
    Classification: Fedora


(this is mostly a yum-level RFE, but it would be nice if we kept the same
depsolving logic in both apps)

The problem:

Selecting a font is a multi-criterium operation. We need to match on font
family, font style, language support, unicode support, etc. At any time all of
just some of those selection criterii can be provided by the user or
applications.

To have features like font auto-installation work reliably, this matching needs
to extend to the package database

Right now rpm is only allowing to specify atomic provides, so we can have a
font package that
Provides font(dejavusans)
and
Provides
font(:lang=el)

but there is no warranty both those provides are belonging to the same font.
There is no way to distinguish between a package that includes an actual greek
dejavusans and a package that includes a dejavusans greek-less file and another
totally different greek font

To workaround this rpm limitation we've been asking packagers to put font files
belonging to different font families in different packages. However:
1. many still don't
2. it's not technically possible for all font formats, for example the ttc font
format allows mixing of fonts with different characteristics in a single file

The ideal solution:

Ability to have Provides like:

font(comma-separated font name list|comma-separated style list|comma-separated
lang list) (rough mockup that probably needs refining)

And have deps like (dejavu|*|el) work in rpm

(yes a font can declare many different names, be available in many different
styles, cover many different languages)

For ttc files we'd then generate one Provides for each font included in the ttc
bundle

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