git current-branch.sh

#!/usr/bin/env bash

branch_pattern="^## (.*)$"
git_status=`git status -sb`
if [[ $git_status =~ $branch_pattern ]]
then
  echo ${BASH_REMATCH[1]}
fi

git-done.sh

#!/usr/bin/env zsh

successfully() {
  $* || (echo "failed" 1>&2 && exit 1)
}

successfully git fetch
successfully git rebase -i origin/master
successfully git push -f
successfully git checkout master
successfully git merge `git current-branch`
successfully git push
successfully git push origin --delete `git current-branch`
successfully git branch -d `git current-branch`