Re: [PATCH 2/2] archive-tar: write extended headers for far-future mtime

From: René Scharfe <l.s.r@web.de>
Date: Jun 22, 2016, 05:46 UTC
Message-ID: <576A2631.2000608@web.de>
In-Reply-To: <57687417.4020009@web.de>

Am 21.06.2016 um 00:54 schrieb René Scharfe:

Show 12 quoted lines

> Am 16.06.2016 um 06:37 schrieb Jeff King:
>>    2. System tars that cannot handle pax headers.
>
> In t5000 there is a simple interpreter for path headers for systems
> whose tar doesn't handle them.  Adding one for mtime headers may be
> feasible.
>
> It's just a bit complicated to link a pax header file to the file it
> applies to when it doesn't also contain a path header.  But we know that
> the mtime of all entries in tar files created by git archive are is the
> same, so we could simply read one header and then adjust the mtime of
> all files accordingly.

This brings me to the idea of using a single global pax header for mtime instead of one per entry. It reduces the size of the archive and allows for slightly easier testing -- it just fits better since we know that all our mtimes are the same.

René