feature(@putout/plugin-convert-commonjs-to-esm) commons: add support …

…of top-level-require

packages/plugin-convert-commonjs-to-esm/lib/commons/fixture/top-level-require.js

@@ -0,0 +1 @@
+const a = require('./package.json');

packages/plugin-convert-commonjs-to-esm/lib/commons/index.js

@@ -3,8 +3,11 @@
 const {
     template,
     operator,
+    types,
 } = require('putout');
+
 const {getPathAfterImports} = operator;
+const {isProgram} = types;
 
 const importSimport = template.ast(`import {createCommons} from 'simport'`);
 const initCommons = template.ast(`const {__filename, __dirname, require} = createCommons(import.meta.url)`);
@@ -29,11 +32,23 @@ module.exports.include = () => [
     'require',
 ];
 
-module.exports.filter = ({scope}) => {
+module.exports.filter = (path) => {
+    const {scope} = path;
+
     const isDirname = scope.hasBinding('__dirname');
     const isFilename = scope.hasBinding('__filename');
     const isRequire = scope.hasBinding('require');
 
+    if (isTopLevelRequire(path))
+        return false;
+
     return !isDirname && !isFilename && !isRequire;
 };
 
+function isTopLevelRequire(path) {
+    if (path.node.name !== 'require')
+        return false;
+
+    return isProgram(path.scope.block);
+}
+

packages/plugin-convert-commonjs-to-esm/lib/commons/index.spec.js

@@ -20,6 +20,11 @@ test('plugin-convert-commonjs-to-esm: commons: transform: require', (t) => {
     t.end();
 });
 
+test('plugin-convert-commonjs-to-esm: commons: no transform: top-level-require', (t) => {
+    t.noTransform('top-level-require');
+    t.end();
+});
+
 test('plugin-convert-commonjs-to-esm: commons: no transform: declared require', (t) => {
     t.noTransform('declared-require');
     t.end();