feat: refactor builds and include sourcemaps and ts support

package.json

@@ -3,11 +3,11 @@
   "version": "2.3.1",
   "description": "Common repository for example datasets used by Vega related projects.",
   "license": "BSD-3-Clause",
-  "main": "build/vega-datasets",
-  "module": "build/src/data",
+  "main": "build/vega-datasets.js",
+  "module": "build/vega-datasets.module.js",
   "unpkg": "build/vega-datasets.min.js",
   "jsdelivr": "build/vega-datasets.min.js",
-  "typings": "build/src/data.d.ts",
+  "types": "build/vega-datasets.module.d.ts",
   "repository": {
     "type": "git",
     "url": "http://github.com/vega/vega-datasets.git"
@@ -16,26 +16,35 @@
     "name": "UW Interactive Data Lab",
     "url": "http://idl.cs.washington.edu"
   },
+  "files": [
+    "src",
+    "build"
+  ],
   "devDependencies": {
-    "@auto-it/conventional-commits": "^10.37.4",
-    "@auto-it/first-time-contributor": "^10.37.4",
+    "@auto-it/conventional-commits": "^10.37.6",
+    "@auto-it/first-time-contributor": "^10.37.6",
+    "@babel/core": "^7.19.3",
+    "@babel/plugin-transform-runtime": "^7.19.1",
+    "@babel/preset-env": "^7.19.3",
+    "@babel/preset-typescript": "^7.18.6",
+    "@babel/runtime": "^7.19.0",
     "@rollup/plugin-json": "^4.1.0",
-    "@rollup/plugin-node-resolve": "^13.3.0",
     "@types/d3-dsv": "^3.0.0",
-    "auto": "^10.37.4",
+    "auto": "^10.37.6",
     "d3-dsv": "^3.0.1",
     "datalib": "^1.9.3",
-    "rollup": "^2.77.3",
-    "terser": "^5.14.2",
-    "typescript": "^4.7.4"
+    "rollup": "^2.79.1",
+    "rollup-plugin-bundle-size": "^1.0.3",
+    "rollup-plugin-terser": "^7.0.2",
+    "rollup-plugin-ts": "^3.0.2",
+    "terser": "^5.15.0",
+    "typescript": "^4.8.4"
   },
   "scripts": {
-    "index": "./scripts/make-url-index.sh > src/urls.ts",
-    "prebuild": "npm run index && tsc",
+    "prebuild": "./scripts/make-url-index.sh > src/urls.ts",
     "build": "rollup -c",
-    "postbuild": "terser build/vega-datasets.js -cm > build/vega-datasets.min.js",
     "flights": "node scripts/flights.js",
     "github": "python scripts/github.py",
-    "release": "auto shipit"
+    "release": "yarn build && auto shipit"
   }
 }

rollup.config.js

@@ -1,13 +1,52 @@
-import resolve from '@rollup/plugin-node-resolve';
-import json from '@rollup/plugin-json';
+import json from "@rollup/plugin-json";
+import ts from "rollup-plugin-ts";
+import bundleSize from "rollup-plugin-bundle-size";
+import { terser } from "rollup-plugin-terser";
 
-export default {
-  input: "build/src/index.js",
-  output: {
-    file: "build/vega-datasets.js",
-    format: "umd",
-    sourcemap: true,
-    name: "vegaDatasets"
+const plugins = (browserslist, declaration) => [
+  json(),
+  ts({
+    tsconfig: (resolvedConfig) => ({
+      ...resolvedConfig,
+      declaration,
+      declarationMap: declaration,
+    }),
+    transpiler: "babel",
+    babelConfig: { presets: ["@babel/preset-env"] },
+    browserslist,
+  }),
+  bundleSize(),
+];
+
+const outputs = [
+  {
+    input: "src/index.ts",
+    output: {
+      file: "build/vega-datasets.module.js",
+      format: "esm",
+      sourcemap: true,
+    },
+    plugins: plugins(undefined, true)
+  },
+  {
+    input: "src/index.ts",
+    output: [
+      {
+        file: "build/vega-datasets.js",
+        format: "umd",
+        sourcemap: true,
+        name: "vegaDatasets",
+      },
+      {
+        file: "build/vega-datasets.min.js",
+        format: "iife",
+        sourcemap: true,
+        name: "vegaDatasets",
+        plugins: [terser()],
+      },
+    ],
+    plugins: plugins("defaults and not IE 11", false)
   },
-  plugins: [resolve(), json()]
-};
+];
+
+export default outputs;

tsconfig.json

@@ -4,6 +4,7 @@
     "module": "es2015",
     "moduleResolution": "node",
     "declaration": true,
+    "declarationMap": true,
     "strict": true,
     "outDir": "./build",
     "inlineSourceMap": true,