Split out rollup scripts

index.js

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+import "./src/index";

scripts/rollup.base.js

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+import fs from "fs";
+import babel from "rollup-plugin-babel";
+import eslint from "rollup-plugin-eslint";
+import resolve from "rollup-plugin-node-resolve";
+import commonjs from "rollup-plugin-commonjs";
+
+export const pkg = JSON.parse(fs.readFileSync("./package.json"));
+const external = Object.keys(pkg.dependencies || {});
+
+const globals = {};
+external.forEach(ext => {
+  switch (ext) {
+  case "mithril":
+    globals["mithril"] = "m";
+    break;
+  default:
+    globals[ext] = ext;
+  }
+});
+
+export const createConfig = ({ includeDepencies }) => ({
+  entry: "index.js",
+  external: includeDepencies ? null : external,
+  globals,
+  plugins: [
+
+    // Resolve libs in node_modules
+    resolve({
+      jsnext: true,
+      main: true,
+      skip: includeDepencies ? [] : external
+    }),
+
+    // Convert CommonJS modules to ES6, so they can be included in a Rollup bundle
+    commonjs({
+      include: "node_modules/**"
+    }),
+
+    eslint({
+      cache: true
+    }),
+
+    babel()
+  ]
+});
+

scripts/rollup.es.js

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+/*
+Build to a module that has ES2015 module syntax but otherwise only syntax features that node supports
+https://github.com/rollup/rollup/wiki/jsnext:main
+*/
+import { pkg, createConfig } from "./rollup.base.js";
+
+const includeDepencies = true; // Use `false` if you are creating a library
+
+const baseConfig = createConfig({ includeDepencies });
+const targetConfig = Object.assign({}, baseConfig, {
+  dest: pkg["jsnext:main"],
+  format: "es"
+});
+
+export default targetConfig;
+

scripts/rollup.umd.js

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+/*
+Build to an Universal Module Definition
+*/
+import { pkg, createConfig } from "./rollup.base.js";
+import uglify from "rollup-plugin-uglify";
+
+const includeDepencies = true; // Use `false` if you are creating a library, or if you are including external script in html
+
+const baseConfig = createConfig({ includeDepencies });
+const targetConfig = Object.assign({}, baseConfig, {
+  dest: pkg.main,
+  format: "umd",
+  sourceMap: true
+});
+
+targetConfig.plugins.push(uglify());
+
+export default targetConfig;
+