Python package gaupol: Namespace Gdk not available

Python package gaupol: Namespace Gdk not available

[Pierre Neidhardt]

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Hi there,

I'm trying to package gaupol (https://otsaloma.io/gaupol/), a subtitle
editor.

--8<---------------cut here---------------start------------->8---
(define-public gaupol
  (package
    (name "gaupol")
    (version "1.4")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://github.com/otsaloma/gaupol/archive/"
                                  version ".tar.gz"))
              (sha256
               (base32
                "12hy5x6s5xk81r75x0z4n6wpq8ygsxc4mbr47qcr0kq55kbvp6jj"))))
    (build-system python-build-system)
    (native-inputs
     `(("gettext" ,gettext-minimal)))
    (inputs
     `(("python-pygobject" ,python-pygobject)
       ("python-pycairo" ,python-pycairo)
       ("python-chardet" ,python-chardet)
       ("gdk-pixbuf" ,gdk-pixbuf)
       ("gtk+" ,gtk+)
       ("gtkspell3" ,gtkspell3)
       ("gst-libav" ,gst-libav)
       ("gst-plugins-base" ,gst-plugins-base)
       ("gst-plugins-good" ,gst-plugins-good)
       ("gst-plugins-bad" ,gst-plugins-bad)
       ("gst-plugins-ugly" ,gst-plugins-ugly)))
    (arguments
     `(#:tests? #f               ; Tests seem to require networking.
       #:phases
       (modify-phases %standard-phases
         ;; gaupol's setup.py script does not support one of the Python build
         ;; system's default flags, "--single-version-externally-managed".
         (replace 'install
           (lambda* (#:key outputs #:allow-other-keys)
             (zero?
              (system* "python" "setup.py" "install"
                       (string-append "--prefix=" (assoc-ref outputs "out"))
                       "--root=/")))))))
    (synopsis "Editor for text-based subtitles")
    (description
     "Gaupol supports multiple subtitle file formats and provides means of
creating subtitles, editing texts and timing subtitles to match video.  The
user interface features a builtin video player and is designed with attention
to convenience of translating and batch processing of multiple documents.")
    (home-page "http://otsaloma.io/gaupol/")
    (license license:gpl3+)))
--8<---------------cut here---------------end--------------->8---

The build runs fine, or so it seems.  But when I try to start it:

--8<---------------cut here---------------start------------->8---
> /gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/bin/gaupol 
Traceback (most recent call last):
  File "/gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/bin/.gaupol-real", line 17, in <module>
    import gaupol
  File "/gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/lib/python3.6/site-packages/gaupol/__init__.py", line 34, in <module>
    gi.require_version("Gdk", "3.0")
  File "/gnu/store/7p24q6jbkzwp7cp44543mi9zzn4czgig-python-pygobject-3.28.2/lib/python3.6/site-packages/gi/__init__.py", line 130, in require_version
    raise ValueError('Namespace %s not available' % namespace)
ValueError: Namespace Gdk not available
--8<---------------cut here---------------end--------------->8---

I suppose I'm missing a dependency but I can't find any reference to
python+gdk anywhere beside python-pygobject... Must be something else.

Anyone?

-- 
Pierre Neidhardt

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Re: Python package gaupol: Namespace Gdk not available

[Kei Kebreau]

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Pierre Neidhardt <ambrevar@gmail.com> writes:

> Hi there,
>
> I'm trying to package gaupol (https://otsaloma.io/gaupol/), a subtitle
> editor.
>
> (define-public gaupol

[...]

>          (replace 'install
>            (lambda* (#:key outputs #:allow-other-keys)
>              (zero?
>               (system* "python" "setup.py" "install"
>                        (string-append "--prefix=" (assoc-ref outputs "out"))
>                        "--root=/")))))))

You can use 'invoke' here instead of 'zero?' with 'system*' for the same
effect.

>     (synopsis "Editor for text-based subtitles")
>     (description
>      "Gaupol supports multiple subtitle file formats and provides means of
> creating subtitles, editing texts and timing subtitles to match video.  The
> user interface features a builtin video player and is designed with attention
> to convenience of translating and batch processing of multiple documents.")
>     (home-page "http://otsaloma.io/gaupol/")
>     (license license:gpl3+)))
>
>
> The build runs fine, or so it seems.  But when I try to start it:
>
>> /gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/bin/gaupol 
> Traceback (most recent call last):
>   File "/gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/bin/.gaupol-real", line 17, in <module>
>     import gaupol
>   File "/gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/lib/python3.6/site-packages/gaupol/__init__.py", line 34, in <module>
>     gi.require_version("Gdk", "3.0")
>   File "/gnu/store/7p24q6jbkzwp7cp44543mi9zzn4czgig-python-pygobject-3.28.2/lib/python3.6/site-packages/gi/__init__.py", line 130, in require_version
>     raise ValueError('Namespace %s not available' % namespace)
> ValueError: Namespace Gdk not available
>
> I suppose I'm missing a dependency but I can't find any reference to
> python+gdk anywhere beside python-pygobject... Must be something else.
>
> Anyone?

My first guess would be that you need to wrap gaupol with the
environment variable "GI_TYPELIB_PATH". Take a look at the sonata
package in gnu/packages/mpd.scm for an example.

Hope this helps,
Kei

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Re: Python package gaupol: Namespace Gdk not available

[Ludovic Courtès]

Hi Pierre,

Pierre Neidhardt <ambrevar@gmail.com> skribis:

>> /gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/bin/gaupol 
> Traceback (most recent call last):
>   File "/gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/bin/.gaupol-real", line 17, in <module>
>     import gaupol
>   File "/gnu/store/gh44n7nfc7x3w8bbmq5l1glvlvycymdw-gaupol-1.4/lib/python3.6/site-packages/gaupol/__init__.py", line 34, in <module>
>     gi.require_version("Gdk", "3.0")
>   File "/gnu/store/7p24q6jbkzwp7cp44543mi9zzn4czgig-python-pygobject-3.28.2/lib/python3.6/site-packages/gi/__init__.py", line 130, in require_version
>     raise ValueError('Namespace %s not available' % namespace)
> ValueError: Namespace Gdk not available

Could it be that you need to set GI_TYPELIB_PATH?  See ‘lightdm’ as an
example.

HTH,
Ludo’.

Re: Python package gaupol: Namespace Gdk not available

[Pierre Neidhardt]

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Yup, that was GI_TYPELIB_PATH.
Thanks Kei and Ludo!

-- 
Pierre Neidhardt

When God saw how faulty was man He tried again and made woman.  As to
why he then stopped there are two opinions.  One of them is woman's.
		-- DeGourmont

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