[bug#35866] [PATCH] gnu: Add qtwebengine.

[mike.rosset@gmail.com]

Hartmut Goebel <h.goebel@crazy-compilers.com> writes:

> Hi,
> in addtion to other remarks:
>
> Am 18.12.19 um 21:45 schrieb Mike Rosset 
>
>  
> +       (uri
> +        (string-append "https://download.qt.io/official_releases/qt/"
> +                       (substring version 0 4)
> +                       "/" version "/submodules/"
> +                       (string-append name "-everywhere-src-" version)
> +                       ".tar.xz"))
>
> Please use the same code and formatting as sued for qtsvg. This helps keeping the code consistent. 
>
>  +        `(modify-phases ,phases
> +           (replace 'configure
> +             (lambda* (#:key inputs outputs #:allow-other-keys)
> +               ;; Avoids potential race conditions
>
> I suggest to put this into *two* new phases: `patch-source` (or so) containing the substitute stuff, and `setup-configure` for setting the environment variables.
>
>  
> +               (substitute* "src/core/web_engine_library_info.cpp"
> +                 (("QLibraryInfo::location\\(QLibraryInfo::TranslationsPath\\)")
> +                  (format #f "QLatin1String(\"~a\")" (string-append (assoc-ref outputs "out") "/share/qt5/translations")))
> +                 (("QLibraryInfo::location\\(QLibraryInfo::DataPath\\)")
> +                  (format #f "QLatin1String(\"~a\")" (string-append (assoc-ref outputs "out") "/share/qt5"))))
>
> I suggest *not* using `format`, as we rarely use it in substitutes and you are using `string-append` anyway. I also suggest to define a variable `out` to be used here (same for `nss`, `udev` below) to avoid having `assic-ref` here, see [0] as an example. Then `format` might even be beneficial:
>
> +                  (format #f "QLatin1String(\"~a/share/qt5/translations\")" out)
>
> +                  (string-append "QLatin1String(\"" out "/share/qt5/translations\")")
>
> [0]
> <https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/qt.scm#n605>

I have made all these changes as requested they should be in 0004 of
series. I've re emailed the complete series. I believe there was an
issue mailing 003.

>  
> +               ;; Valid QT_BUILD_PARTS variables are:
> +               ;; libs tools tests examples demos docs translations
> +               (invoke "qmake" "QT_BUILD_PARTS = libs tools" "--"
> +                       "--webengine-printing-and-pdf=no"
> +                       "--webengine-ffmpeg=system"
> +                       "--webengine-icu=system"
> +                       "--webengine-pepper-plugins=no")))))
>
> Would setting `#:configure-flags` with "-DBUILD_TESTS=off" (see e.g. [1]) work, too, instead of passing "QT_BUILD_PARTS"?
>
> [1] <https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/qt.scm#n2119>

It's possible that this might work. But I don't think it's worth the
effort. I kept this in line qtsvg hopefully I can switch the tests on at
one point. I have documented why the tests can not be run as of now.