- Travis: Remove old versions; add 10, 12, 14

- npm: Add recommended `bugs`, `keywords`, `dependencies` and use `author`/`contributors`
- npm: Update devDeps, and switch to Babel 7/preset-env
- npm: Use simple run script syntax
- npm: Drop package-lock.json in favor of npmrc for consistency with other estools projects
- Maintenance: Add `.editorconfig`
- Maintenance: Drop use of gulpfile
- Update: Mocha API
- Testing: Add nyc
- Testing: Use chai/register-expect
- Testing: Drop bundled esprima in favor of using versioned
- Testing: Update espree API to supply sourceType/ecmaVersion
- Testing: Enable espree for dynamic import and adjust test expectation to take into account full Program context
- Docs: Use more modern syntax in examples

Author: brettz9

.babelrc .babelrc.json.babelrc renamed to .babelrc.json

@@ -1,5 +1,5 @@
 {
-    "presets": [["env", {
+    "presets": [["@babel/preset-env", {
       "targets": {
         "node": "4.0"
       }

.editorconfig

@@ -0,0 +1,18 @@
+# This file is for unifying the coding style for different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4
+
+[*.json]
+indent_size = 2
+
+[*.yml]
+indent_size = 2

.npmignore

@@ -0,0 +1 @@
+package-lock = false

.npmrc

@@ -3,6 +3,6 @@ arch:
  - ppc64le
 language: node_js
 node_js:
-    - 4
-    - 6
-    - 8
+  - 10
+  - 12
+  - 14

.travis.yml

@@ -14,11 +14,11 @@ The following code will output all variables declared at the root of a file.
 
 ```javascript
 estraverse.traverse(ast, {
-    enter: function (node, parent) {
+    enter (node, parent) {
         if (node.type == 'FunctionExpression' || node.type == 'FunctionDeclaration')
             return estraverse.VisitorOption.Skip;
     },
-    leave: function (node, parent) {
+    leave (node, parent) {
         if (node.type == 'VariableDeclarator')
           console.log(node.id.name);
     }
@@ -29,7 +29,7 @@ We can use `this.skip`, `this.remove` and `this.break` functions instead of usin
 
 ```javascript
 estraverse.traverse(ast, {
-    enter: function (node) {
+    enter (node) {
         this.break();
     }
 });
@@ -38,8 +38,8 @@ estraverse.traverse(ast, {
 And estraverse provides `estraverse.replace` function. When returning node from `enter`/`leave`, current node is replaced with it.
 
 ```javascript
-result = estraverse.replace(tree, {
-    enter: function (node) {
+const result = estraverse.replace(tree, {
+    enter (node) {
         // Replace it with replaced.
         if (node.type === 'Literal')
             return replaced;
@@ -51,7 +51,7 @@ By passing `visitor.keys` mapping, we can extend estraverse traversing functiona
 
 ```javascript
 // This tree contains a user-defined `TestExpression` node.
-var tree = {
+const tree = {
     type: 'TestExpression',
 
     // This 'argument' is the property containing the other **node**.
@@ -64,7 +64,7 @@ var tree = {
     extended: true
 };
 estraverse.traverse(tree, {
-    enter: function (node) { },
+    enter (node) { },
 
     // Extending the existing traversing rules.
     keys: {
@@ -78,7 +78,7 @@ By passing `visitor.fallback` option, we can control the behavior when encounter
 
 ```javascript
 // This tree contains a user-defined `TestExpression` node.
-var tree = {
+const tree = {
     type: 'TestExpression',
 
     // This 'argument' is the property containing the other **node**.
@@ -91,7 +91,7 @@ var tree = {
     extended: true
 };
 estraverse.traverse(tree, {
-    enter: function (node) { },
+    enter (node) { },
 
     // Iterating the child **nodes** of unknown nodes.
     fallback: 'iteration'
@@ -102,7 +102,7 @@ When `visitor.fallback` is a function, we can determine which keys to visit on e
 
 ```javascript
 // This tree contains a user-defined `TestExpression` node.
-var tree = {
+const tree = {
     type: 'TestExpression',
 
     // This 'argument' is the property containing the other **node**.
@@ -115,11 +115,11 @@ var tree = {
     extended: true
 };
 estraverse.traverse(tree, {
-    enter: function (node) { },
+    enter (node) { },
 
     // Skip the `argument` property of each node
-    fallback: function(node) {
-        return Object.keys(node).filter(function(key) {
+    fallback(node) {
+        return Object.keys(node).filter((key) => {
             return key !== 'argument';
         });
     }

README.md

@@ -2,39 +2,60 @@
   "name": "estraverse",
   "description": "ECMAScript JS AST traversal functions",
   "homepage": "https://github.com/estools/estraverse",
+  "bugs": "https://github.com/estools/estraverse/issues",
   "main": "estraverse.js",
   "version": "5.3.0",
   "engines": {
     "node": ">=4.0"
   },
-  "maintainers": [
-    {
-      "name": "Yusuke Suzuki",
-      "email": "utatane.tea@gmail.com",
-      "web": "http://github.com/Constellation"
-    }
+  "keywords": [
+    "traversal"
+  ],
+  "author": {
+    "name": "Yusuke Suzuki",
+    "email": "utatane.tea@gmail.com",
+    "web": "http://github.com/Constellation"
+  },
+  "contributors": [
+    "Brett Zamir"
+  ],
+  "files": [
+    "estraverse.js",
+    "dist"
   ],
   "repository": {
     "type": "git",
     "url": "http://github.com/estools/estraverse.git"
   },
+  "dependencies": {},
   "devDependencies": {
-    "babel-preset-env": "^1.6.1",
-    "babel-register": "^6.3.13",
-    "chai": "^2.1.1",
-    "espree": "^1.11.0",
-    "gulp": "^3.8.10",
-    "gulp-bump": "^0.2.2",
-    "gulp-filter": "^2.0.0",
-    "gulp-git": "^1.0.1",
-    "gulp-tag-version": "^1.3.0",
-    "jshint": "^2.5.6",
-    "mocha": "^2.1.0"
+    "@babel/core": "^7.14.0",
+    "@babel/preset-env": "^7.14.0",
+    "@babel/register": "^7.13.16",
+    "chai": "^4.3.4",
+    "espree": "^7.3.1",
+    "esprima": "^4.0.1",
+    "jshint": "^2.12.0",
+    "mocha": "^8.3.2",
+    "nyc": "^15.1.0"
   },
   "license": "BSD-2-Clause",
+  "nyc": {
+    "branches": 100,
+    "lines": 100,
+    "functions": 100,
+    "statements": 100,
+    "reporter": [
+      "html",
+      "text"
+    ],
+    "exclude": [
+      "test"
+    ]
+  },
   "scripts": {
-    "test": "npm run-script lint && npm run-script unit-test",
+    "test": "npm run lint && npm run unit-test",
     "lint": "jshint estraverse.js",
-    "unit-test": "mocha --compilers js:babel-register"
+    "unit-test": "nyc mocha --require chai/register-expect --require @babel/register"
   }
 }

gulpfile.js

@@ -20,8 +20,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import { expect } from 'chai';
-
 export default function checkDump(dump, expected) {
   expect(normalize(expected)).to.be.equal(normalize(dump));
 }

package.json

@@ -24,7 +24,7 @@
 
 import Dumper from './dumper';
 import checkDump from './checkDump';
-import { parse as esprima } from './third_party/esprima';
+import { parse as esprima } from 'esprima';
 import { parse as espree } from 'espree';
 
 function classDeclaration() {
@@ -250,9 +250,8 @@ describe('export', function() {
 describe('import', function() {
     it('default specifier #1', function() {
         const tree = espree(`import Cocoa from 'rabbit-house'`, {
-            ecmaFeatures: {
-                modules: true
-            }
+            ecmaVersion: 2015,
+            sourceType: 'module'
         });
 
         checkDump(Dumper.dump(tree), `
@@ -271,9 +270,8 @@ describe('import', function() {
 
     it('named specifier #1', function() {
         const tree = espree(`import {Cocoa, Cappuccino as Chino} from 'rabbit-house'`, {
-            ecmaFeatures: {
-                modules: true
-            }
+            ecmaVersion: 2015,
+            sourceType: 'module'
         });
 
         checkDump(Dumper.dump(tree), `
@@ -300,9 +298,8 @@ describe('import', function() {
 
     it('namespace specifier #1', function() {
         const tree = espree(`import * as RabbitHouse from 'rabbit-house'`, {
-            ecmaFeatures: {
-                modules: true
-            }
+            ecmaVersion: 2015,
+            sourceType: 'module'
         });
 
         checkDump(Dumper.dump(tree), `
@@ -322,27 +319,20 @@ describe('import', function() {
 
 describe('dynamic import', function() {
     it('expression pattern #1', function() {
-        // TODO: espree currently doesn't support dynamic imports. Update when it does
-        // const tree = espree(`import('rabbit-house')`, {
-        //     ecmaFeatures: {
-        //         modules: true
-        //     }
-        // });
-
-        const tree = {
-            type: 'ImportExpression',
-            source: {
-                type: 'Literal',
-                value: 'rabbit-house'
-            }
-        };
+        const tree = espree(`import('rabbit-house')`, {
+            ecmaVersion: 2020
+        });
 
-      checkDump(Dumper.dump(tree), `
-          enter - ImportExpression
-          enter - Literal
-          leave - Literal
-          leave - ImportExpression
-      `);
+        checkDump(Dumper.dump(tree), `
+            enter - Program
+            enter - ExpressionStatement
+            enter - ImportExpression
+            enter - Literal
+            leave - Literal
+            leave - ImportExpression
+            leave - ExpressionStatement
+            leave - Program
+        `);
     });
 });