haskell/haskell-platform — pull request #107 by juhp (2014-06-05 02:02:05+00:00)
Title: use "tar xf" for compression autodetection

GNU tar 1.15 (2004) and later supports auto-detection of compression.
GHC 7.8 started shipping .tar.xz binary tarballs in addition to .tar.bz2,
so this change should allow using either with hptool and also .gz, etc.