Checks that staging has no modified or untracked files before allowing a push

pre-receive

#!/bin/bash

cd ../
unset GIT_DIR

read rev_old rev_new refname

if [[ "$refname" == *master* ]]
  then
    echo "Checking staging for modified/untracked files..."
    git diff --name-only --exit-code
    rc=$?
    if [ -z "`git ls-files -o --exclude-standard`" ] && [ $rc -eq 0 ]
      then
        echo "Staging is clean, continuing..."
      else 
        echo "Please commit changes on staging first"
        exit 1
    fi
fi