Please provide some version information

[pdfkungfoo]

Just like (almost) all of the other tools provided by the developers of the AppImage suite of tools (which are strongly recommended by them for 3rd party developers to prepare their software for shipment) linuxdeployqt should also support a flag to retrieve version information. For completeness and consistency, all the following should be supported:

./linuxdeployqt -V
./linuxdeployqt -version
./linuxdeployqt --version

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Oh, and once it does, it should of course also report this option in its short usage info screen (i.e. when called without any arguments).

[probonopd]

I second this. @TheAssassin since you have experience with fancy version statements, may I ask you to port this over here as well? Thanks.

[TheAssassin]

./linuxdeployqt --version

Not sure whether that can be supported by the Qt argument parser. But as all the other parameters are prefixed with a single dash, too, I don't think that'd be a blocker.

I would go a step further and always print a version statement.

[probonopd]

I would go a step further and always print a version statement.

Agree!

[TheAssassin]

Working on a patch. After merging my alternative CMake build configuration, I copied the code and adjusted it a bit from AppImageUpdate's code. However, I have to somehow call subprocesses from qmake to get this to work. I am not a Qt/qmake expert (haven't really used it before), so that might take a while.

[TheAssassin]

After hours of debugging and tinkering with qmake's weird syntax, I managed to get this to work properly. See #226. If the build goes well, I'll merge the PR, and close this issue.

[probonopd]

Thank you!