change exports to fix bundles (#1812)

* change exports to fix bundles

* use browserify for bundling

* revert exports

* use browserify in bundle script

Author: epoberezkin

package.json

@@ -17,7 +17,8 @@
     "test-codegen": "nyc cross-env TS_NODE_PROJECT=spec/tsconfig.json mocha -r ts-node/register 'spec/codegen.spec.ts' -R spec",
     "test-debug": "npm run test-spec -- --inspect-brk",
     "test-cov": "nyc npm run test-spec",
-    "bundle": "rm -rf bundle && rollup -c",
+    "rollup": "rm -rf bundle && rollup -c",
+    "bundle": "rm -rf bundle && node ./scripts/bundle.js ajv ajv7 ajv7 && node ./scripts/bundle.js 2019 ajv2019 ajv2019 && node ./scripts/bundle.js 2020 ajv2020 ajv2020 && node ./scripts/bundle.js jtd ajvJTD ajvJTD",
     "build": "rm -rf dist && tsc && cp -r lib/refs dist && rm dist/refs/json-schema-2019-09/index.ts && rm dist/refs/json-schema-2020-12/index.ts && rm dist/refs/jtd-schema.ts",
     "json-tests": "rm -rf spec/_json/*.js && node scripts/jsontests",
     "test-karma": "karma start",
@@ -75,6 +76,7 @@
     "@typescript-eslint/eslint-plugin": "^3.8.0",
     "@typescript-eslint/parser": "^3.8.0",
     "ajv-formats": "^3.0.0-rc.0",
+    "browserify": "^17.0.0",
     "chai": "^4.0.1",
     "cross-env": "^7.0.2",
     "dayjs": "^1.10.4",

rollup.config.js

@@ -26,7 +26,7 @@ function createBundleConfig(sourceFile, outFile, globalName) {
 }
 
 export default [
-  createBundleConfig("ajv", "ajv7", "av7"),
+  createBundleConfig("ajv", "ajv7", "ajv7"),
   createBundleConfig("2019", "ajv2019", "ajv2019"),
   createBundleConfig("2020", "ajv2020", "ajv2020"),
   createBundleConfig("jtd", "ajvJTD", "ajvJTD"),

scripts/bundle.js

@@ -0,0 +1,48 @@
+"use strict"
+
+const fs = require("fs")
+const path = require("path")
+const browserify = require("browserify")
+const {minify} = require("terser")
+
+const [sourceFile, outFile, globalName] = process.argv.slice(2)
+
+const json = require(path.join(__dirname, "..", "package.json"))
+const bundleDir = path.join(__dirname, "..", "bundle")
+if (!fs.existsSync(bundleDir)) fs.mkdirSync(bundleDir)
+
+browserify({standalone: globalName})
+  .require(path.join(__dirname, "../dist", sourceFile), {expose: sourceFile})
+  .bundle(saveAndMinify)
+
+async function saveAndMinify(err, buf) {
+  if (err) {
+    console.error("browserify error:", err)
+    process.exit(1)
+  }
+
+  const bundlePath = path.join(bundleDir, outFile)
+  const opts = {
+    ecma: 2018,
+    warnings: true,
+    compress: {
+      pure_getters: true,
+      keep_infinity: true,
+      unsafe_methods: true,
+    },
+    format: {
+      preamble: `/* ${json.name} ${json.version} (${globalName}): ${json.description} */`,
+    },
+    sourceMap: {
+      filename: outFile + ".min.js",
+      url: outFile + ".min.js.map",
+    },
+  }
+
+  const result = await minify(buf.toString(), opts)
+
+  fs.writeFileSync(bundlePath + ".bundle.js", buf)
+  fs.writeFileSync(bundlePath + ".min.js", result.code)
+  fs.writeFileSync(bundlePath + ".min.js.map", result.map)
+  if (result.warnings) result.warnings.forEach((msg) => console.warn("terser.minify warning:", msg))
+}