On Tue, Jan 24, 2012 at 05:20:44PM -0500, Pierre Abbat wrote:
> I have a bug report (starting X causes reboot) in which I gave a date but not
> an exact version, and I've been asked to check out the latest code and see if
> it fixes an unrelated bug (make -j2 buildkernel). What git command can I use
> before checking out so that you can reproduce the first bug?
The output from `uname -a' contains a prefix of the commit hash
of the source code from which the kernel was built
$ uname -a
DragonFly X335 2.13-DEVELOPMENT DragonFly v2.13.0.929.g2a1f9-DEVELOPMENT #0:
Mon Jan 16 18:02:19 JST 2012 root@X335:/usr/obj/build/usr/src/sys/SMP i386
The string `2a1f9' after `g' before `-DEVELOPMENT' is the one you need.
If you need the `uname -a' output from the older kernel, try this:
$ strings /boot/kernel.old/kernel |tail -n4
DragonFly v2.13.0.796.g4090d-DEVELOPMENT #0: Wed Jan 4 22:59:22 JST 2012
root@X335:/usr/obj/build/usr/src/sys/SMP
DragonFly
2.13-DEVELOPMENT
You can use this string to checkout the previous version:
$ cd /usr/src
$ git checkout 2a1f9
Note: checking out '2a1f9'.
(and long message here mentioning you're not on a particular branch
and an instruction on how to create a new branch)
You can go back to the original branch, say, `master', by
$ git checkout master
Finally, Git remembers what you did to your repository for you for a while,
so you don't even have to remember what version you have now before updating
to the latest:
$ git reflog
e27434d HEAD@{0}: checkout: moving from
2a1f96b998a7a95f220d7a527c2f0a7b9e42be3a to master
2a1f96b HEAD@{1}: checkout: moving from master to 2a1f9
e27434d HEAD@{2}: pull: Fast-forward
2a1f96b HEAD@{3}: pull: Fast-forward
4090d6f HEAD@{4}: pull: Fast-forward
e820d19 HEAD@{5}: pull: Fast-forward
