git_functions

# These are some functions that are useful for dealing with git branches
# ----------------------------------------------------------------------

# This function returns the name of the current git branch
function gitb {
    git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'
}

# This function updates the current branch with the latest changes from the
# origin repository. The master branch is checked out, a git pull is performed,
# the original branch is checked out again, and then the changes from master
# are rebased back into the branch.
#
# Essentially, the following steps are performed. The command is smart enough
# to do the right thing when the current branch _is_ the master branch.
#
#   git checkout master
#   git pull --rebase
#   git checkout $branch
#   git rebase master
#
function gitu {
    branch=`gitb`
    if [ "$branch" != "master" ]; then
        git checkout master
    fi
    git pull --rebase
    if [ "$branch" != "master" ]; then
        git checkout "$branch"
        git rebase master
    fi
}

# This function pushes the changes from the current branch up to the origin
# repository. The master branch is checked out and the changes from the
# original branch are rebased into the master branch. After this, all changes
# are pushed to the origin repository. The original branch is checked out
# again.
#
# Essentially, the following steps are performed. The command is smart enough
# to do the right thing when the current branch _is_ the master branch.
#
#   git checkout master
#   git rebase $branch
#   git push
#   git checkout $branch
#
function gitp {
    branch=`gitb`
    if [ "$branch" != "master" ]; then
        git checkout master
        git rebase "$branch"
    fi
    git push
    if [ "$branch" != "master" ]; then
        git checkout "$branch"
    fi
}

# This function calls the "gitu" and the "gitp" functions in succession. This
# pulls in changes from the master branch to the current branch, and then
# pushes all changes from the current branch up to the origin repository. This
# combination of commands keeps the master branch revision history nice and
# linear.
#
function gitup {
    gitu
    gitp
}