KPluginLoader::findPlugins(..) returning empty vector

[Aleix Pol]

Hi,
Try enabling KDE_INSTALL_USE_QT_SYS_PATHS.

Aleix


On Fri, Aug 12, 2016 at 11:35 AM, Srivatsan Iyer
<supersaiyanmode.rox at gmail.com> wrote:
> Hi Aleix,
>
> Thanks for your response. It was not installing to /usr. I re ran cmake with
> the proper prefix and got it installed to /usr. That hasn't yet solved the
> problem. From the docs, I understand that the KPluginLoader::findPlugins(..)
> can take an absolute path -- i tried that too without any success. I even
> tried exporting QT_DEBUG_PLUGINS=1. That gave me a set of paths where
> QFactoryLoader::QFactoryLoader() was looking for. If it is of any use, I
> have pasted `sed | sort | uniq` version here: http://pastebin.com/k7acTvLP.
> Would you have any ideas about what is going on?
>
> Oh and BTW, prior to compiling from sources, I had KDE-connect installed as
> a part of kubuntu-desktop package. It worked perfectly until I uninstalled
> it to replace it with what I compiled.
>
> Srivatsan
>
> On Thu, 11 Aug 2016 at 17:37 Aleix Pol <aleixpol at kde.org> wrote:
>>
>> On Thu, Aug 11, 2016 at 11:37 AM, Srivatsan Iyer
>> <supersaiyanmode.rox at gmail.com> wrote:
>> > Hello,
>> >
>> > I checked out the kdeconnect-kde repository and have been trying to
>> > compile
>> > from sources. I have been able to get it running. However, when I
>> > connect
>> > via the phone, I see an empty list in the main activity. I spent a few
>> > hours
>> > digging -- from the PluginFactory Java class (in Android) to
>> > pluginloader.cpp. I am stuck at the point where
>> > KPluginLoader::findPlugins("kdeconnect/") in PluginLoader constructor
>> > returns an empty vector causing all downstream capabilities listing to
>> > silently fail. From the documentation I, sort of, understand that it is
>> > a
>> > directory -- but where is it? The docs say it looks for JSON files
>> > within
>> > the subdirectories under it. Should this be plugins directory instead? I
>> > tried passing in, without any success, the absolute path to my local
>> > kdeconnect-kde/plugins directory. I would really appreciate any pointers
>> > or
>> > help.
>> >
>> > Details about my environment:
>> >  - KDE Plasma version: 5.6.5
>> >  - KDE Frameworks version: 5.23.0
>> >  - QT Version: 5.5.1
>> >  - Kernel version: 4.4.0-31-generic
>> >
>> > My method to run and debug:
>> >  - make && sudo make install
>> >  - (kill kdeconnectd)
>> >  - call "kdeconnect-cli -l" (seems to have a side effect of starting the
>> > daemon if not running)
>> >  - check logs using "tail -f /var/log/syslog | grep kdeconn"
>>
>> Can you make sure that you're installing to /usr or that
>> QT_PLUGIN_PATH is properly initialized?
>>
>> > On a slightly different note: I had compile issues with pluginloader.cpp
>> > within the function "pluginsForCapabilities(..)" for that's using
>> > qSet1.intersects(qSet2). This is unavailable in Qt5.5. I replaced it
>> > with an
>> > inefficient equivalent:
>> >     if ((pluginIncomingCapabilities.isEmpty()
>> >         && pluginOutgoingCapabilities.isEmpty())
>> >         || (incoming & pluginOutgoingCapabilities).size()
>> >         || (outgoing & pluginIncomingCapabilities).size()) { .. }
>> >
>> > Would it make sense to not use .intersects(..) -- because that is the
>> > only
>> > line of code in the entire source that causes the compile to fail on QT
>> > version 5.5 - 5.6 ?
>>
>> It compiles fine with Qt 5.6, not Qt 5.5 indeed. I'd recommend you to
>> use a distribution with the stable version of the packages.
>> We discussed patching it up, but it doesn't really improve things,
>> since already released distributions won't pick up the package anyway.
>>
>> Aleix
>
> --
>
> Srivatsan Iyer