I would like to customize my vuejs app; I do so after the project has been scaffolded. Perl is wonderful for string replacements like this.

vue-setup-custom.sh

vue init webpack sudoku
cd sudoku
yarn add bulma node-sass sass-loader
mkdir src/assets/sass
touch src/assets/sass/main.scss
echo -e "\n@import '~bulma/bulma'" >> src/assets/sass/main.scss
perl -i -0pe 's#^(Vue.config.productionTip.*$)#// Require the main Sass manifest file\nrequire\('"'"'./assets/sass/main.scss'"'"'\);\n\n\1#gms' /Users/dcvezzani/greenseedtechnologies/sudoku/src/main.js
perl -i -0pe 's#^(    "dev": .*)$#    "open": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js --open",\n\1#gms' /Users/dcvezzani/greenseedtechnologies/sudoku/package.json
perl -i -0pe 's#(path: ./)(.,)#\1hello\2#g; s#^(  routes: .*)$#\1\n    {\n      path: "/",\n      name: "Sudoku",\n      component: Sudoku\n    },#gm; s#^(import HelloWorld.*)$#\1\nimport Sudoku from "@/components/Sudoku"#gm' /Users/dcvezzani/greenseedtechnologies/sudoku/src/router/index.js
sed -i'' -e '/logo.png/d' /Users/dcvezzani/greenseedtechnologies/sudoku/src/App.vue
cp /Users/dcvezzani/greenseedtechnologies/sudoku/src/components/HelloWorld.vue /Users/dcvezzani/greenseedtechnologies/sudoku/src/components/Sudoku.vue
perl -i -0pe 's#<div class="hello">.*</div>#<div class="sudoku">\n  </div>#gms; s#HelloWorld#Sudoku#g; s#<style scoped>.*</style>#<style scoped>\n</style>#gms' /Users/dcvezzani/greenseedtechnologies/sudoku/src/router/index.js