Published at LXer:
CLAs aren't new. FSF-copyrighted projects have been using copyright assignment since at least 1985 - in return, the FSF promise that the software will always be distributed under a copyleft-style license. For over a decade, Apache Software Foundation projects have required that contributors sign a CLA that allows them to retain copyright, but grants the ASF the right to relicense the work as it wishes. For the most part, this hasn't been terribly controversial.
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