#18236: support xz compressed tarballs
---------------------------+----------------------------
   Reporter:  rws          |            Owner:
       Type:  enhancement  |           Status:  new
   Priority:  major        |        Milestone:  sage-6.7
  Component:  build        |         Keywords:
  Merged in:               |          Authors:
  Reviewers:               |  Report Upstream:  N/A
Work issues:               |           Branch:
     Commit:               |     Dependencies:
   Stopgaps:               |
---------------------------+----------------------------
 When trying to feed Sage a new `pynac...tar.xz` I get:
 {{{
 Setting up build directory for pynac-0.3.5
 tar: Archive is compressed. Use -J option
 tar: Error is not recoverable: exiting now
 Error: failed to extract /home/ralf/sage/upstream/pynac-0.3.5.tar.xz
 }}}
 The difference in compression is significant:
 {{{
 -rw-r--r--  1 ralf users 512029 Apr 17 09:14 pynac-0.3.5.tar.bz2
 -rw-r--r--  1 ralf users 652879 Apr 17 09:14 pynac-0.3.5.tar.gz
 -rw-r--r--  1 ralf users 443976 Apr 17 09:15 pynac-0.3.5.tar.xz
 }}}

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Ticket URL: <http://trac.sagemath.org/ticket/18236>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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