[IPython-dev] changing md5 for different archive versions

[Mark Voorhies]

On 02/07/2014 02:44 AM, Matthias BUSSONNIER wrote:
>
> Le 7 févr. 2014 à 11:09, Jason Grout a écrit :
>
>> I just noticed that the md5 checksum for these two "official" archived
>> versions is different:
>>
>> https://github.com/ipython/ipython/releases/download/rel-1.0.0/ipython-1.0.0.tar.gz
>>
>> http://archive.ipython.org/release/1.0.0/ipython-1.0.0.tar.gz
>>
>> MD5 (ipython-1.0.0.tar.gz-github) = 2268fa83f257d14943eb04e3333a6fac
>> MD5 (ipython-1.0.0.tar.gz.-ipython.org) = fcba21b5a3827bf4e6c921d04d984c2f
>
> The unpacked source seem identical.
> Though the github.com-gunzip tar alway appear from the 9 of august
> But last modify date of the ipython.org one always is the download time…
> weird.

Some sort of timestamp in the gzip header is expected behavior:

mvoorhie at virgil:~$ date && echo "Hello, world" | md5sum
Fri Feb  7 09:14:25 PST 2014
a7966bf58e23583c9a5a4059383ff850  -
mvoorhie at virgil:~$ date && echo "Hello, world" | md5sum
Fri Feb  7 09:14:27 PST 2014
a7966bf58e23583c9a5a4059383ff850  -
mvoorhie at virgil:~$ date && echo "Hello, world" | md5sum
Fri Feb  7 09:14:28 PST 2014
a7966bf58e23583c9a5a4059383ff850  -

mvoorhie at virgil:~$ date && echo "Hello, world" | gzip - | md5sum
Fri Feb  7 09:14:30 PST 2014
25344640395b8542b76a9610c6a9bac3  -
mvoorhie at virgil:~$ date && echo "Hello, world" | gzip - | md5sum
Fri Feb  7 09:14:31 PST 2014
a1dafaad89bd1a40e8cb01bc3603d663  -
mvoorhie at virgil:~$ date && echo "Hello, world" | gzip - | md5sum
Fri Feb  7 09:14:32 PST 2014
be8d99c50c031e4b2573ea2fe82f2a20  -

--Mark

>
>> What's going on?
>>
>> Thanks,
>>
>> Jason
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