[TYPO3-core] RFC: #13697: Add possibility to retrieve extension version

[Tolleiv Nietsch]

Type: Feature

Bugtracker references:
http://bugs.typo3.org/view.php?id=13697

Branches:
trunk

Problem:
There's no way to determine the version of an installed extension 
through the API.

Solution:
Attached patch resolves that by adding the getExtVersion() to t3lib_extmgm.

Additional information:
If an extension's behaviour relies on a specific version of another 
extension, it has to retrieve the version of the related extension 
manually ( e.g. 
https://svn.typo3.org/TYPO3v4/CoreProjects/feedit/trunk/feeditadvanced/ext_localconf.php 
  [^] checking whether it needs to XCLASS templavoila) - that's not very 
nice at all.

Cheers,
Tolleiv
-- 
Tolleiv Nietsch
www.tolleiv.de - www.aoemedia.de
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