Git Quick Sheet

First Steps

The first step for using a git is checkout the main branch

git clone git@tensho.pcbi.upenn.edu:<Repsitory Name>

After making changes, the code is checked in by:

git commit -am "<change message here (or whatever your message is note the "a" for add as well as the "m" for message )>"

git push <Repository Name>

Note that unlike svn, which has a single global copy and the local copy on your machine, git effectively has three copies of each branch - the files you see, the local repository that you commit to, and the remove repository (on sobolev) that you push to.

To sync to the latest version (always commit first, then pull):

git commit -a

git pull

After you have used git for a few days, you probably should set up your own branch. (See branches below.)

If you want to set up your own git backup

create a bare git directory wherever the repository is

mkdir foo.git; cd foo.git; git init --bare --shared=group;

remember the double dashes

populate it

git fetch <some local git repository> master:master

see below to make the local repo, then clone it back locally so you can edit it

git clone <Repsitory Name> (drop the .git suffix)

to create your own local git repository from data in foo.tar

tar -xvf foo.tar

cd foo

git init

git add .

git commit -m "import of foo source tree"

creating branches

if you want to make your own changes on your on branch, you can then

cd git_directory_name

into your new files, and type

git checkout -b <new branch name>

then
- # move to your own branch to do some work

git checkout my_branch

# start working by getting all changes

git fetch origin

git merge origin/master

# also get something from lyle's branch

git merge origin/ungar

# do some stuff

git add file.txt

git commit -m "ENH: dollar dollar bill yo! "

git push origin my_branch

note that committing and pushing will only affect your branch, so you don't need to worry about messing other people up -- or being messed up by them.

if you want:

# also push to master if you think it's ready
# but be sure you are in sync first

git fetch origin

git merge origin/master

git push origin master

# or checkout master, merge in your stuff, and then push it

To learn about merging branches, see (e.g.) http://book.git-scm.com/3_basic_branching_and_merging.html

Fixing Things:

For fixing problems/mistakes look into the basic guide in http://ohshitgit.com/

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