Auto increment version of npm and git tagging

build_npm.sh

#! /bin/bash
npm version patch
version=`git diff HEAD^..HEAD -- "$(git rev-parse --show-toplevel)"/package.json | grep '^\+.*version' | sed -s 's/[^0-9\.]//g'`
git add *;
git commit -m "Commit message"


if [ "$version" != "" ]; then
    git tag -a "v$version" -m "`git log -1 --format=%s`"
    echo "Created a new tag, v$version"
    git push --tags
    npm publish
fi