The <fisheye installation>/python/hg/hgfelog/hgfelog.py script implements 'felog' command for Mercurial and is being used by Fisheye for indexing of Mercurial repositories.
Developed by Atlassian, since ~2010 it was published under the GPL v3 license.
This GPL license will be removed and since Fisheye/Crucible 4.8.3 the hgfelog.py script will be published under standard Atlassian Software License Agreement, like the entire Fisheye & Crucible products.