arcanist+git pushing and cleanup

arc-push

#!/bin/bash -x

# Assuming you're using the 'mutable history' workflow (rebases everywhere),
# run this script from a branch that's been accepted in Differential to
# 'arc amend' the branch, rebase the code onto master, push up the changes,
# and delete the branch.

current_branch=$(git name-rev --name-only HEAD)
git fetch && git checkout master && git pull -r &&
git checkout $current_branch &&
git rebase master && arc amend &&
# Also checks out master
git rebase $current_branch master &&
git push && git branch -d $current_branch