#12898: Update top-level README.txt
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Reporter: jdemeyer | Owner: mvngu
Type: defect | Status: positive_review
Priority: blocker | Milestone: sage-5.0
Component: documentation | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers: William Stein, Karl-Dieter
Crisman
Authors: Jeroen Demeyer | Merged in:
Dependencies: | Stopgaps:
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Comment (by drkirkby):
Is is true that ''"Each spkg in $SAGE_ROOT/spkg/standard/ is a bzip'd
tarball"'', as stated? I doubt the bzip2 package is. I think that is an
uncompressed tarball. I'm not sure if there are any others either.
Also, I don't know why anyone puts '''-xfj''' or similar, when '''xfj'''
will do. Tar is not defined by POSIX, so it's impossible to give an
authoritative answer, but every tar program I have ever used, does not
need the minus sign. The use of x (to extract), c (to create), t (to
view), u (to update) or r (to replace) are not options. You '''must'''
have one of them. Since they are not options, you don't need the minus
sign. The '''j''' is an option, but GNU tar does not require the minus
sign. So one might as well save a bit of wear on the keyboard, and not put
the minus sign.
I thought GNU tar was supposed to be a requirement to build Sage. In which
case, one might as well drop the '''j''' too, since GNU tar will work out
for itself that the file is compressed or not. If it's compressed, it will
silently uncompress it.
Dave
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12898#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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