Rename sourceMap into sourcemap according rollup api

README.md

@@ -16,26 +16,24 @@ npm i rollup-plugin-uglify -D
 ## Usage
 
 ```js
-import { rollup } from 'rollup';
-import { uglify } from 'rollup-plugin-uglify';
+import { rollup } from "rollup";
+import { uglify } from "rollup-plugin-uglify";
 
 rollup({
-  entry: 'main.js',
-  plugins: [
-    uglify()
-  ]
+  entry: "main.js",
+  plugins: [uglify()]
 });
 ```
 
 ## Options
 
 ```js
-uglify(options, minifier)
+uglify(options);
 ```
 
-`options` – default: `{}`, type: `object`. [UglifyJS API options](https://github.com/mishoo/UglifyJS2/blob/master/README.md#minify-options)
+`options` - [uglifyJS API options](https://github.com/mishoo/UglifyJS2/blob/master/README.md#minify-options)
 
-`minifier` – default: `require('uglify-js').minify`, type: `function`. Module to use as a minifier. You can use other versions (or forks) of UglifyJS instead default one.
+`options.sourcemap` – default: `true`, type: `boolean`. The only own option which is used to generate source maps and pass them to rollup.
 
 ## Examples
 
@@ -46,7 +44,7 @@ If you'd like to preserve comments (for licensing for example), then you can spe
 ```js
 uglify({
   output: {
-    comments: function (node, comment) {
+    comments: function(node, comment) {
       if (comment.type === "comment2") {
         // multiline comment
         return /@preserve|@license|@cc_on/i.test(comment.value);
@@ -62,7 +60,7 @@ Alternatively, you can also choose to keep all comments (e.g. if a licensing hea
 ```js
 uglify({
   output: {
-    comments: 'all'
+    comments: "all"
   }
 });
 ```

index.js

@@ -1,8 +1,14 @@
 const { codeFrameColumns } = require("@babel/code-frame");
 const Worker = require("jest-worker").default;
 
-function uglify(userOptions) {
-  const options = Object.assign({ sourceMap: true }, userOptions);
+function uglify(userOptions = {}) {
+  if (userOptions.sourceMap != null) {
+    throw Error("sourceMap option is removed, use sourcemap instead");
+  }
+
+  const options = Object.assign({}, userOptions, {
+    sourceMap: userOptions.sourcemap !== false
+  });
 
   return {
     name: "uglify",

test/test.js

@@ -37,6 +37,18 @@ test("minify with sourcemaps", async () => {
   expect(result.map).toBeTruthy();
 });
 
+test("does not allow to pass sourceMap", async () => {
+  try {
+    const bundle = await rollup({
+      input: "test/fixtures/sourcemap.js",
+      plugins: [uglify({ sourceMap: false })]
+    });
+    expect(true).toBeFalsy();
+  } catch (error) {
+    expect(error.toString()).toMatch(/sourceMap option is removed/);
+  }
+});
+
 test("throw error on uglify fail", async () => {
   try {
     const bundle = await rollup({