[Qt-creator] Searching for documentation about contribution to Qt-Creator

[Jochen Becher]

Hello,

I want to contribute some improvements to QtCreator (Todo Plugin and one
or two new plugins later this year). I searched for documentation how to
contribute. The Wiki at qt.io seems to be totally outdated. Is there any
current documentation?

I tried to clone from code.qt.io (as mentioned on the download page) but
failed (git: and http: failed with "remote hang up" and https: with
"server unknown"). Where can I clone the current source? (gitourious
didn't change since 15th May and will be closed down end of this month).
Any documentation available on that?

Is there any comprehensive documentation about usage of git and gerrit,
design documentation and coding style for Qt-Creator?

Regards, Jochen Becher