Hello Jon,
On Wed, Apr 22, 2009 at 06:33:12PM +1000, Jon Seymour wrote:
> * calculate the git hashes of the tree (without making copies of the
> files in the tree)
You can hand-craft a tree object:
for f in $filelist; do
printf "100644 %s\x00" $f;
git hash-object $f |
perl -n -e 'chomp; for $c (split(/(.{2})/)) { printf("%c", hex($c)) if $c }';
done |
git hash-object -t tree --stdin
You get some extra points for directories that include subdirs :-)
There is a problem though, I think it has to do with the order of the
files in the tree object. Here is a real-life example from the Linux
kernel (I choosed the usr subdirectory, because it's small and doesn't
contain subdirs):
ukleinek@cepheus:~/gsrc/linux-2.6/usr$ for f in .gitignore Kconfig Makefile gen_init_cpio.c initramfs_data.S initramfs_data.bz2.S initramfs_data.gz.S initramfs_data.lzma.S; do printf "100644 %s\x00" $f; git hash-object $f | perl -n -e 'chomp; for $c (split(/(.{2})/)) { printf("%c", hex($c)) if $c }'; done | git hash-object -t tree --stdin
64f2ca854bc19fd29479b198be11beba56a26b1e
ukleinek@cepheus:~/gsrc/linux-2.6/usr$ git rev-parse HEAD:usr
64f2ca854bc19fd29479b198be11beba56a26b1e
There is a practical problem though: The filelist has to be sorted in a
way that is not provided by ls, so:
ukleinek@cepheus:~/gsrc/linux-2.6/usr$ for f in $(ls -A); do printf "100644 %s\x00" $f; git hash-object $f | perl -n -e 'chomp; for $c (split(/(.{2})/)) { printf("%c", hex($c)) if $c }'; done | git hash-object -t tree -w --stdin
a0a6efb3f1de956badc7607c7d372cc325a18846
ukleinek@cepheus:~/gsrc/linux-2.6/usr$ git ls-tree a0a6efb3f1de956badc7607c7d372cc325a18846 | wc -l
0
doesn't work :-/
This would make a nice plumbing:
git hash-tree $directory
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html