From: Andreas Schwab <schwab@linux-m68k.org>
Date: Tue, 10 Dec 2013 19:02:29 GMT
Subject: Re: Setting file timestamps to commit time (git-checkout)
Message-ID: <87bo0olebe.fsf@igel.home>
In-Reply-To: <20131210083531.GB4087@linux.vnet.ibm.com>

Dominik Vogt <vogt@linux.vnet.ibm.com> writes:

> The second best approach I could think of is to stamp files with the
> timestamp of the last commit that touched that, but I guess that is
> not a cheap operation either.

I'm using this script for this:

#!/bin/sh
git log --name-only --format=format:%n%ct -- "$@" |
perl -e 'my $do_date = 0; chomp(my $cdup = `git rev-parse --show-cdup`);
    while (<>) {
	chomp;
	if ($do_date) {
	    next if ($_ eq "");
	    die "Unexpected $_\n" unless /^[0-9]+$/;
	    $d = $_;
	    $do_date = 0;
	} elsif ($_ eq "") {
	    $do_date = 1;
	} elsif (!defined($seen{$_})) {
	    $seen{$_} = 1;
 	    utime $d, $d, "$cdup$_";
 	}
    }'

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."