On Wed, 21 Jan 2009, Mamoru Tasaka wrote:
Panu Matilainen wrote, at 01/21/2009 11:22 PM +9:00:
On Wed, 21 Jan 2009, Patrice Dumas wrote:
On Wed, Jan 21, 2009 at 04:02:17PM +0200, Panu Matilainen wrote:
Take for example man- or info-pages: they get compressed at build time so
the time stamps will always be different between different builds, no
matter what the timestamp of the original file was. If timestamps caused
conflicts, no such file could ever be shared even though the content is
identical.
If I remembmer well, in fedora, man pages timestamps are kept, even if
gzipped.
I don't see any attempt to do time stamp preservation in brp-compress (and
evidence from packages says the same), would be possible of course if
somebody cared enough :) Hmm, would be easy even, as "touch" appears to
have the perfect option for it:
-r, --reference=FILE
use this fileʼs times instead of current time
- Panu -
gzip itself keeps timestamps by default (man page also says:
By default, gzip keeps the original file name and timestamp in the compressed
file)
Ah, so it seems, I had never noticed that.
The differences simply then come from the fact that the files are
build-time generated, one way or the other. Just as an example of it,
glibc generates it's *.info documentation from *.texi sources, so the
timestamps differ regardless of gzip preserving it:
[pmatilai@localhost ~]$ rpm -q --qf "[%{filemtimes} %{filenames}\n]"
glibc-devel.x86_64|grep info| head -2
1228741245 /usr/share/info/libc.info-1.gz
1228741245 /usr/share/info/libc.info-10.gz
[pmatilai@localhost ~]$ rpm -q --qf "[%{filemtimes} %{filenames}\n]"
glibc-devel.i386|grep info| head -2
1228741252 /usr/share/info/libc.info-1.gz
1228741252 /usr/share/info/libc.info-10.gz
- Panu -
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