Quickly set up a shared git repository

gitinit.sh

REPONAME=${1%/} # trim trailing slash

if [ ! -d "$REPONAME" ]; then
    # Make a temporary working directory
    mkdir $REPONAME && cd $REPONAME
    echo .DS_Store > .gitignore # ignore a common MacOS file

    # make an initial commit
    git init && git add .gitignore && git commit -m "initial commit"
else
    # Assume this is a basic git repo that needs to be set up for sharing
    cd $REPONAME
fi

# rename the "master" branch to "develop" and set up a "production" branch
# this is to prepare it for our git-flow workflow
git branch -m master develop
git branch production

# make a bare repo which can be shared
cd .. && git clone --bare $REPONAME $REPONAME.git

# remove the old directory and prep to make final changes for the shared repository
rm -rf $REPONAME && cd $REPONAME.git

# set some config variables to make sure git sets up file permissions correctly
# and disables non-fast-forward pushes (which change other people's history
# and are usually a bad idea)
git config core.sharedrepository true
git config receive.denyNonFastForwards true

# make filenames case sensitive
git config core.ignorecase false

# optionally (but recommended) enable the repo for explicit export by
# git-daemon and set up hooks used by web repo browsers
touch git-daemon-export-ok
mv hooks/post-update.sample hooks/post-update

# make sure permissions are all good
find objects -type d -exec chmod 02775 {} \;

# done
cd ..