Hi,
On Fri, 11 Jul 2008, Johannes Schindelin wrote:
> On Fri, 11 Jul 2008, Dmitry Potapov wrote:
>
> > On Fri, Jul 11, 2008 at 04:58:40PM +0200, Toralf Förster wrote:
> > >
> > > $> git-log v2.6.26-rc9.. --pretty=short | grep "^commit" | cut -f2 -d' ' | xargs -n 1 git describe | grep '\-56\-'
> >
> > The fastest way to do the same would be:
> >
> > git rev-list v2.6.26-rc9.. | xargs git describe | grep '\-56\-'
>
> You forgot the "--all" option to rev-list.
>
> And I doubt it would be the "fastest" way, in terms of execution speed.
>
> Also, it leaves out this case:
>
> rc9 - A - B - C - D - F
> \ /
> ----- E -----
>
> F would be "rc9-5", but also "rc9-2".
>
> Oh, and this would leave out reflogs, too.
>
> Can we please let this concept die now?
Heh, just as an intellectual exercise, I could not resist trying to brush
up my l33t py7h0n sk1llz (and I am sure somebody will teach me something
useful again):
-- snipsnap --
#!/usr/bin/python
import os
import sys
if len(sys.argv) != 2:
print 'Usage:', sys.argv[0], '<pseudo-describe>'
# split argument
dash = sys.argv[1].rindex('-')
tag = sys.argv[1][0:dash]
generation = int(sys.argv[1][dash + 1:])
# get sha1 of given tag's commit
pipe = os.popen('git rev-parse ' + tag + '^{commit}')
sha1 = pipe.readlines()[0].strip()
pipe.close()
# 'number' will contain (positive) distance to given commit
number = dict()
number[sha1] = set()
number[sha1].add(0)
pipe = os.popen('git rev-list ^' + sha1 + ' --all --parents')
rev_list = pipe.readlines()
pipe.close()
rev_list.reverse()
for line in rev_list:
list = line.strip().split(' ')
number[list[0]] = set()
for parent in list[1:]:
if parent in number:
for n in number[parent]:
number[list[0]].add(n + 1)
for n in number[list[0]]:
if n == generation:
print list[0]
