Date: Mon, 15 Aug 2005 12:17:41 -0700
From: tony.luck@intel.com
Subject: Some tutorial text (was git/cogito workshop/bof at linuxconf au?)
+Abstract: In this article, Tony Luck discusses how he uses GIT
+ as a Linux subsystem maintainer.
Here's something that I've been putting together on how I'm using
GIT as a Linux subsystem maintainer.
-I suspect that I'm a bit slap-happy with the "git checkout" commands in
-the examples below, and perhaps missing some of the _true-git_ ways of
-doing things.
-
-Tony
+Last updated w.r.t. GIT 0.99.5
+
Linux subsystem maintenance using GIT
-------------------------------------
$ cd work
-Make a GIT branch named "linus", and rename the "origin" branch as linus too:
+Set up a remotes file so that you can fetch the latest from Linus' master
+branch into a local branch named "linus":
+
+ $ cat > .git/remotes/linus
+ URL: rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
+ Pull: master:linus
+ ^D
- $ git checkout -b linus
- $ mv .git/branches/origin .git/branches/linus
+and create the linus branch:
+
+ $ git branch linus
The "linus" branch will be used to track the upstream kernel. To update it,
you simply run:
- $ git checkout linus && git pull linus
+ $ git fetch linus
+
+you can do this frequently (and it should be safe to do so with pending
+work in your tree, but perhaps not if you are in mid-merge).
-you can do this frequently (as long as you don't have any uncommited work
-in your tree).
+If you need to keep track of other public trees, you can add remote branches
+for them too:
-If you need to keep track of other public trees, you can add branches for
-them too:
+ $ git branch another
+ $ cat > .git/remotes/another
+ URL: ... insert URL here ...
+ Pull: name-of-branch-in-this-remote-tree:another
+ ^D
- $ git checkout -b another linus
- $ echo URL-for-another-public-tree > .git/branches/another
+and run:
+
+ $ git fetch another
Now create the branches in which you are going to work, these start
out at the current tip of the linus branch.
$ git checkout test && git resolve test linus "Auto-update from upstream"
$ git checkout release && git resolve release linus "Auto-update from upstream"
-Set up so that you can push upstream to your public tree:
+Set up so that you can push upstream to your public tree (you need to
+log-in to the remote system and create an empty tree there before the
+first push).
- $ echo master.kernel.org:/ftp/pub/scm/linux/kernel/git/aegl/linux-2.6.git > .git/branches/origin
+ $ cat > .git/remotes/mytree
+ URL: master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6.git
+ Push: release
+ Push: test
+ ^D
-and then push each of the test and release branches using:
+and the push both the test and release trees using:
- $ git push origin test
-and
- $ git push origin release
+ $ git push mytree
+
+or push just one of the test and release branches using:
+
+ $ git push mytree test
+or
+ $ git push mytree release
Now to apply some patches from the community. Think of a short
snappy name for a branch to hold this patch (or related group of
git checkout $1 && git resolve $1 linus "Auto-update from upstream"
;;
linus)
- before=$(cat .git/HEAD)
- git checkout linus && git pull linus
- after=$(cat .git/HEAD)
+ before=$(cat .git/refs/heads/linus)
+ git fetch linus
+ after=$(cat .git/refs/heads/linus)
if [ $before != $after ]
then
git-whatchanged $after ^$before | git-shortlog