[OpenWrt-Devel] [PATCH 2/2] Prevent more gzip timestamps
florian at openwrt.org
Tue Jul 14 18:07:10 EDT 2015
On 14/07/15 15:05, Reiner Herrmann wrote:
> On Sun, Jul 12, 2015 at 12:06:01PM -0700, Florian Fainelli wrote:
>> 2015-07-12 9:41 GMT-07:00 Reiner Herrmann <reiner at reiner-h.de>:
>>> To improve reproducibility, prevent the inclusion of timestamps
>>> in the gzip header.
>> This looks fine to me, this also unveils a lot of repetition in how we
>> invoke gzip and its parameters, would you mind factoring this in a
>> variable such that we control how gzip options are set globally?
>> Eventually someone will want to be able to turn back on timestamps and
>> original names in how gzip generates compressed files, and we might as
>> well have a single location to fix this.
> The commands that are currently available in variables are named
> just in uppercase (FIND, TAR, etc.).
> But gzip also interprets the variable GZIP to parse additional
> options, so naming the variable for the command also GZIP will
> probably cause problems.
Ah good point. How about GZIP_CMD then?
> Or would it be better to just globally export GZIP with the
> default parameters (which would then differ from the currents
> semantics of having the command inside the variable)?
We could do that, I am just wondering if this would make it a bit more
difficult to debug in case we forgot to patch a given Makefile or that
we do reset the environment/do not inherit it.
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