Review Request 120029: introduce the concept of package fallback

[Marco Martin]

> On Sept. 1, 2014, 4:53 p.m., David Edmundson wrote:
> > I need some the concept explaining, why would a developer set a fallbackpackage?
> > Is it not always org.kde.breeze.desktop?
> 
> Marco Martin wrote:
>     It would usually be the packagestructure setting it, in initPackage(), so setFallbackPackage follows the same pattern as addFileDefinition(), setRequired() and the likes.
>     
>     so, for the packages of type Plasma/LookAndFeel it would be org.kde.breeze.desktop
>     for packages of types Plasma/Shell, it would be org.kde.desktop
>     
>     even tough at some point it will probably have to be something more complicated, like the default lookandfeel one depending from  the current shell, if ever needed, will be feasible.
> 
> David Edmundson wrote:
>     Ah, makes sense. Thanks.
>     
>     Do you really expect a linked link big enough to cycle? I can't really see it going 3 deep. The cycle check is call cool though :)
>     
>     Could you add a warning in setFallbackPackage() if it finds a cycle and no-ops. Could be confusing to debug otherwise.

added warning..
i see it very unlikely that it's going to go deep, but better safe than sorry :p


- Marco


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On Sept. 1, 2014, 6:37 p.m., Marco Martin wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/120029/
> -----------------------------------------------------------
> 
> (Updated Sept. 1, 2014, 6:37 p.m.)
> 
> 
> Review request for KDE Frameworks and Plasma.
> 
> 
> Repository: plasma-framework
> 
> 
> Description
> -------
> 
> introduces the concept of fallback for packages.
> this will replace the private statically linked class LookAndFeelAccess in workspace and desktop, but be more generic so will be usable for things like the shell package as well.
> The feature has an autotest as well to check it's actually working and doesn't break other stuff.
> 
> the package structures that will use this, will just set a package in their structure::initPackage()
> tough for the user of Package in c++ is possible as well to set the fallback package outside the structure if custm things are neede (it's guarded that cycles don't occur in the fallback chain)
> 
> 
> Diffs
> -----
> 
>   autotests/CMakeLists.txt 4e64f38 
>   autotests/data/testfallbackpackage/contents/ui/main.qml PRE-CREATION 
>   autotests/data/testfallbackpackage/metadata.desktop PRE-CREATION 
>   autotests/data/testpackage/contents/ui/otherfile.qml PRE-CREATION 
>   autotests/fallbackpackagetest.h PRE-CREATION 
>   autotests/fallbackpackagetest.cpp PRE-CREATION 
>   src/plasma/data/servicetypes/plasma-shell.desktop e2c83ba 
>   src/plasma/package.h 2c686d7 
>   src/plasma/package.cpp 6ad3321 
>   src/plasma/private/package_p.h d902eb1 
> 
> Diff: https://git.reviewboard.kde.org/r/120029/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Marco Martin
> 
>

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