[bug#42279] [PATCH] gnu: Add distrho-ports.

[Alexandros Theodotou <alex@zrythm.org>]

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Hi,

I'm trying to build the latest version but I'm running into issues with
fonts not showing (same issues as before, I just didn't bother until
now). Attaching the current package definition.

After building, I am running the plugins like:
`LV2_PATH=/gnu/store/z2xjjfpaybyv1byal7nxrvqxd7b1hjqh-distrho-ports-
2020-12-27/lib/lv2 jalv.gtk3 urn:juce:TalFilter2`
This requires JACK to be running and jalv to be installed. I'm not sure
if there's an easier way to test.

The problem I am having is described here, with a screenshot:
https://github.com/DISTRHO/DISTRHO-Ports/issues/63

Strace log is included in that issue.

How can I fix this?

Thanks,
Alex

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(define fontconfig/font-dejavu
  (package
    (inherit fontconfig)
    (inputs
     ;; XXX: Reuse the name to avoid having to override the configure flags.
     `(("gs-fonts" ,font-dejavu)))))

(define-public distrho-ports
  (package
    (name "distrho-ports")
    (version "2020-12-27")
    (source
     (origin
       (method git-fetch)
       (uri
        (git-reference
         (url "https://github.com/DISTRHO/DISTRHO-Ports.git")
         (commit version)))
       (file-name (git-file-name name version))
       (sha256
        (base32 "0gc0cgbl160vzy3iain5yzzj1ygpc5kinnhkvhrrcngg1ai5qlv3"))))
    (build-system meson-build-system)
    (inputs
     `(("alsa-lib" ,alsa-lib)
       ("fontconfig/font-dejavu", fontconfig/font-dejavu)
       ("freetype" ,freetype)
       ("mesa" ,mesa)
       ("libxrender" ,libxrender)
       ("libxcursor" ,libxcursor)
       ("xorgproto" ,xorgproto)
       ("libx11" ,libx11)))
    (native-inputs
     `(("lv2" ,lv2)
       ("pkg-config" ,pkg-config)))
    (synopsis "Collection of audio plugins and LV2 ports")
    (description
     "DISTRHO is a project with the goal of making cross-platform audio
plugins and GNU/Linux ports.
This package includes HiReSam, LUFSMeter-Multi, LUFSMeter, Arctican Function,
Arctican Pilgrim, Dexed, dRowAudio Distortion, dRowAudio Distortion Shaper,
dRowAudio Flanger, dRowAudioReverb, dRowAudio Tremolo, DrumSynth, easySSP,
EQuinox, JUCE Demo Plugin, JUCE OPL, Klangfalter, Luftikus, Obxd, Pitched
Delay, Refine, Stereo Source Separation, TAL Dub 3, TAL Noise Maker, TAL
Reverb 2, TAL Reverb 3, TAL Reverb, TAL Vocoder 2, Temper, Vex and
Wolpertinger.")
    (home-page "http://distrho.sourceforge.net/ports")
    (license (list license:gpl2      ; found in doc directory
                   license:lgpl3+    ; found in doc directory
                   license:gpl3))))  ; mentioned in meson file