My build script, more or less.

build.sh

#!/bin/sh

# Formatting variables
blackBG='\033[1;40m'
cyan='\033[1;36m'$blackBG
gray='\033[1;37m'$blackBG
green='\033[1;32m'$blackBG
purple='\033[1;35m'$blackBG
red='\033[0;31m'$blackBG
yellow='\033[1;33m'$blackBG
nc='\033[0m'$blackBG

project=$(pwd | sed -e "s/.*\///g")
branch=$(git rev-parse --abbrev-ref HEAD)

# get everything ready
echo "Getting version number.\n"
grunt build

# figure out the version
version=$(cat VERSION)

# checkout a branch for this version
echo "Checking out ${cyan}latest${nc} branch for ${cyan}v${version}${nc}.\n"
git branch -D latest
git checkout -b latest

# add the distribution file & push it
echo "Adding build file to latest branch and pushing to remote.\n"
git rm -rf {scripts,tasks,cmn}
git rm {.gitignore,.npmignore,Gruntfile.js,package.json,README.md}
git add assets
git rm assets/bundle.js # this often varies
git commit -am "v${version}"
git push origin latest --force

# remove "latest" tag on the remote & create a new local one
echo "Creating new tag for ${cyan}v${version}${nc} and pushing to remote.\n"
git tag -f v${version}

# push up new tags
echo "Pushing tags up to remote.\n"
git push origin --tags

# cleanup
echo "Cleaning up and checking out ${cyan}${branch}${nc}.\n"
rm -rf VERSION

# go back to where you started
git checkout $branch

# run collect
grunt collect

echo "${green}Done!${nc}\n\n"