Heroku buildpack: Gradle + NPM

Requirements:

• Backend (Java Gradle) in backend folder with build.gradle
• Frontend (NPM) in frontend folder with package.json

Executes following tasks:

• Install Node.js according to Frontend package.json engine settings
• Install NPM according to Frontend package.json engine settings
• Install dependencies according to Frontend package.json
• Executes build assets task in Frontend using npm run build:prod
• Install JDK for Backend
• Installs Gradle Wrapper for Backend if not provided
• Build app by running Gradle task stage

Settings:

Default dirs (backend and frontend) could be overwritten with env vars:

export BACKEND_SOURCE_DIR=back
export FRONTEND_SOURCE_DIR=front

Also several directories supported, splitted by ;

export BACKEND_SOURCE_DIR=backend;worker
export FRONTEND_SOURCE_DIR=frontend;embed

Frontend build could be skipped by using appropriate var set to YES

export SKIP_FRONTEND_BUILD=YES