Adding build info attribute to KAboutData to improve bug report data?

[Kevin Funk]

Heya,

The KDevelop team is currently discussing a patch which adds git-describe like 
information to the version string in KAboutData:
  https://phabricator.kde.org/D8158
  (don't bother reading through the comments...)

Problem:

When KAboutData's version is set to something like "5.1.80-24-g262fb4cb9f" and 
when attempting to report a bug via KDevelop -> Help -> Report Bug, 
bugs.kde.org will no longer pre-select the correct version in the version 
list. Even worse: The version information is lost completely if the user does 
not copy it from the dialog.

Idea:
Let's add a 'build info' attribute to KAboutData which may contain custom data 
filled by a project to provide more information about a specific build.

Then, for instance in KDevelop's main.cpp:
```
KAboutData data(...);
data.setBuildInfo("Version: " KDEVELOP_FULL_VERSION_STRING);
```
... with KDEVELOP_FULL_VERSION_STRING being "5.1.80-24-g262fb4cb9f"

And then during the bug report process, just amend the url used to direct the 
user to bugs.kde.org:
  https://bugs.kde.org/enter_bug.cgi?
format=guided&product=kdevelop&version=5.1.80&comment=Build%20information:
%0AVersion:%205.1.80-24-g262fb4cb9f

Would require changes in kcoreaddons (KAboutData) and kxmlgui (KBugReport) 
afaics.

Comments? There are a couple of other KDE projects (thinking of krita, kexi -- 
which also use Git info) which could benefit from this.

This is also extensible, one could add more content to the build info 
attribute which would be sent over to bugs.kde.org.

Regards,
Kevin

-- 
Kevin Funk | kfunk at kde.org | http://kfunk.org
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