divmain

filename="package.json"
pattern='  "version": "([0-9]+\.[0-9]+\.[0-9]+).*'

git log --pretty="format:%H" -- package.json | {
    while read current_hash; do
        if [ -n "$previous_hash" ]; then
            new_version=`git diff $previous_hash $current_hash -- $filename | sed -n -E -e "s/^\-$pattern/\1/p"`
            if [ -n "$new_version" ]; then
                echo version bumped to $new_version with $previous_hash
            fi

Stuk

var webpackConfig = {
    plugins: [
        // Plugin to show any webpack warnings and prevent tests from running
        function () {
            this.plugin("done", function (stats) {
                if (stats.compilation.warnings.length) {
                    // Log each of the warnings
                    stats.compilation.warnings.forEach(function (warning) {
                        console.log(warning.message || warning);
                    });