#12602: Rework download/extract code in sage-spkg
---------------------------+------------------------------------------------
   Reporter:  jdemeyer     |          Owner:  GeorgSWeber   
       Type:  enhancement  |         Status:  needs_review  
   Priority:  major        |      Milestone:  sage-5.0      
  Component:  build        |       Keywords:                
Work_issues:               |       Upstream:  N/A           
   Reviewer:               |         Author:  Jeroen Demeyer
     Merged:               |   Dependencies:  #12479        
---------------------------+------------------------------------------------
Description changed by jdemeyer:

Old description:

> The current code in `sage-spkg` to determine which package to install and
> whether to download it is buggy and too complicated.  Also get rid of
> calls to the `newest_version` script, allow gzip compression of .spkg
> files, get rid of the "download again" part (why was it needed?).
>
> Changes in behaviour:
>  1. When specifying a download URL, it will always download the file,
> even if a corresponding spkg exists locally.  This allows for easier
> development of spkgs, because people often post updated spkgs with the
> same version number.
>  2. "sage -f package" without a version number will use the most recent
> (by modification time) local spkg in spkg/standard or spkg/optional.
> Only if no such package exists, it will try to download it.  This makes
> it consistent with "sage -f package-x.y.z" with a version number.

New description:

 The current code in `sage-spkg` to determine which package to install and
 whether to download it is buggy and too complicated.  Also get rid of
 calls to the `newest_version` script, get rid of the "download again" part
 (why was it needed?).

 Changes in behaviour:
  1. When specifying a download URL, it will always download the file, even
 if a corresponding spkg exists locally.  This allows for easier
 development of spkgs, because people often post updated spkgs with the
 same version number.
  2. "sage -f package" without a version number will use the most recent
 (by modification time) local spkg in spkg/standard or spkg/optional.  Only
 if no such package exists, it will try to download it.  This makes it
 consistent with "sage -f package-x.y.z" with a version number.
  3. Allow gzip compression (in addition to bzip2 and no compression) of
 spkgs.

--

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12602#comment:8>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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