Review Request 126161: OS X housekeeping

[René J.V. Bertin]

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src/kdeinit/kinit_mac.mm (lines 662 - 666)
<https://git.reviewboard.kde.org/r/126161/#comment61726>

    I'd love to add `[NSApp activateIgnoringOtherApps:YES]` and/or `[NSApp unhide]` here, preceded by `[NSApplication sharedApplication]` so that the spawned `executable` appears in front and not behind the windows of the "parent" application.
    
    I think that's a very sensible thing to do, but sadly those calls are part of (or call into) the SDKs that are off-limits between a `fork()` and an `exec()`.
    
    This really makes me reconsider to use a wrapper, because it quickly grows old 1) having to wait for an expected application to appear, 2) realise it must have opened somewhere in the background and 3) go dig it up.
    
    If only I could be sure that the spawned application is NOT supposed to inherit the environment and other context from kdeinit5. In that case I could rewrite the command to execute so that it uses LaunchServices ... via a proxy that's already available (`/usr/bin/open`).
    
    NB: this may well be why `[NSProcessInfo setProcessName:]` doesn't appear to have the intended effect.
    
    So, David, what's worse here — introducing an additional layer or putting up with applications that play hide and seek?


- René J.V. Bertin


On Nov. 26, 2015, 5:20 p.m., René J.V. Bertin wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/126161/
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> 
> (Updated Nov. 26, 2015, 5:20 p.m.)
> 
> 
> Review request for KDE Software on Mac OS X and KDE Frameworks.
> 
> 
> Repository: kinit
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> Description
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> This patch addresses several issues with the OS X adaptations:
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> -1 replaces the obsolete Q_OS_MAC with Q_OS_OSX
> -2 builds the relevant applications `nongui` instead of as app bundles
> -3 turns klauncher into an "agent" by setting `LSUIElement` to true programmatically
> -4 ports a patch that has been in MacPorts' `port:kdelibs4` since October 14th 2009, which prevents a kdeinit crash that is caused by calling exec after `fork()` in an application that has used non-POSIX APIs and/or calling those APIs in the exec'ed application. This patch (originally by MacPorts developers Jeremy Lainé and Jeremy Lavergne) rearranges call order and uses a proxy application to do the actual exec.
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> 
> Diffs
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>   src/kdeinit/CMakeLists.txt f94db71 
>   src/kdeinit/kdeinit5_proxy.mm PRE-CREATION 
>   src/kdeinit/kinit.cpp a18008a 
>   src/kdeinit/kinit_mac.mm PRE-CREATION 
>   src/klauncher/CMakeLists.txt 746edfa 
>   src/klauncher/klauncher.h e155f72 
>   src/klauncher/klauncher.cpp 8b3d343 
>   src/klauncher/klauncher_main.cpp f69aaa5 
>   src/start_kdeinit/CMakeLists.txt 46d6cb3 
>   src/wrapper.cpp 95b7ec2 
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> Diff: https://git.reviewboard.kde.org/r/126161/diff/
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> 
> Testing
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> On OS X 10.9.5 with Qt 5.5.1 and KF5rameworks 5.16.0 . With this patch, starting `kded5` will launch kdeinit5 and klauncher5 as expected, but `kdeinit5 --kded` does not yet launch `kded5`. This is probably acceptable for typical KF5 use on OS X (kded5 can be launched as a login item or as a LaunchAgent) but I will have another look at why the kded isn't started.
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> I am not yet able to perform further testing; practice will for instance have to show whether point 2 above needs revision (apps that need to be installed as app bundles).
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> Similarly it will have to be seen whether point 3 above has any drawbacks. Applications running as agents do not show up in the Dock or App Switcher. Thus, klauncher will not be able to "turn itself into" an application that does have a full GUI presence with my current modification. I don't know if that's supposed to be possible though.
> NB: I have been building the KDE4 klauncher in a way that makes it impossible to construct a GUI at all, so I'm not expecting issues in KF5 as long as klauncher's role hasn't evolved too much.
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> 
> Thanks,
> 
> René J.V. Bertin
> 
>

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