Re: [PATCH 6/9] gnu: fontforge: Make SVG builds reproducible.

[Eric Bavier <bavier@member.fsf.org>]

On 2016-04-06 12:36, Leo Famulari wrote:
> On Tue, Apr 05, 2016 at 11:32:58PM -0500, ericbavier@openmailbox.org 
> wrote:
>> From: Eric Bavier <bavier@member.fsf.org>
>> 
>> * gnu/packages/fontutils.scm (fontforge)[source]: Add snippet to clear
>>   timestamp in svg.c.
>> ---
>>  gnu/packages/fontutils.scm | 7 ++++++-
>>  1 file changed, 6 insertions(+), 1 deletion(-)
>> 
>> diff --git a/gnu/packages/fontutils.scm b/gnu/packages/fontutils.scm
>> index 75edd55..5ca9835 100644
>> --- a/gnu/packages/fontutils.scm
>> +++ b/gnu/packages/fontutils.scm
>> @@ -512,7 +512,12 @@ definitions.")
>>                 ;; Make TTF builds bit-reproducible by clearing the 
>> timestamp
>>                 ;; that goes in TTF files.
>>                 (substitute* "fontforge/tottf.c"
>> -                 (("cvt_unix_to_1904\\(now") 
>> "cvt_unix_to_1904(0"))))))
>> +                 (("cvt_unix_to_1904\\(now") "cvt_unix_to_1904(0"))
>> +
>> +               ;; Make SVG builds bit-reproducible by clearing the 
>> timestamp
>> +               ;; that goes in SVG files.
>> +               (substitute* "fontforge/svg.c"
>> +                 (("ctime\\(&now\\)") "ctime(0)"))))))
> 
> Could you use the value of the environment variable SOURCE_DATE_EPOCH
> instead of 0?

Probably.  But I'd save that for a later update, since it would be a 
much bigger change (that we could hopefully move upstream).

`~Eric