Toggle between git branches

gitback.sh

# 0. MOTIVATION
# If you're working with two git branches, it might be convenient
# to have a way of quickly toggling between them.

# Update: Eric D. Wang has informed me of the built-in
# `git checkout -` command (analogous to the usual `cd -`)
# that provides the same functionality. Please use that
# instead.


# 1. DEFINITION
# -------------
# 1a. Add the following method to your shell rc file (e.g. ~/.zshrc)
function gitback() {
  git checkout $(git reflog | awk '/checkout/ {print $6}' | sed -n '1p')
}

# 1b. Source the rc file (replace '~/.zshrc' with yours)
$ . ~/.zshrc


# USAGE
# -----
# Suppose you're on `master`. Check out `feature-branch`:
$ git checkout feature-branch
(feature-branch) $ ...

# Get back to the last branch:
$ gitback
(master) $ ..

# Wanna go back to `feature-branch`?
$ gitback
(feature-branch) $ ...