savepull.sh

#!/bin/zsh
# Usage:    $ savepull [dir]
#
# Default:
#   dir   = ./
#
# Updates the master branch of the specified git repository
# from upstream (aka origin/master), but handles dirty directory
# by stashing the state, switching to master, then coming back to
# the initial branch & pop-stashing automatically.

local dir="$1"
if [[ -n $dir ]]; then
    eval "cd $dir"
fi

local branch="$(git branch | noglob grep ^* | sed -r 's/\* //')"
local stashed='false'

if [[ !($branch == 'master') ]]; then
    if [[ ! $(git status) =~ 'working directory clean$' ]]; then
        stashed='true'
        eval 'git stash'
    fi
    eval 'git checkout master'
fi

eval 'git pull'

if [[ !($branch == 'master') ]]; then
    eval "git checkout $branch"
fi

if [[ $stashed == 'true' ]]; then
    eval 'git stash pop'
fi

print Done.

# JSON License. 2016.