Merge pull request #123 from django-webpack/fix-strip-ansi-import

Embed the ansi-regex code into the project to fix an import dependency issue

lib/index.js

@@ -20,7 +20,7 @@ const get = require('lodash.get');
 const each = require('lodash.foreach');
 const fromPairs = require('lodash.frompairs');
 const toPairs = require('lodash.topairs');
-const stripAnsi = require('strip-ansi');
+const stripAnsi = require('./utils/stripAnsi');
 
 function getAssetPath(compilation, name) {
   return path.join(compilation.getPath(compilation.compiler.outputPath), name.split('?')[0]);

lib/utils/stripAnsi.js

@@ -0,0 +1,27 @@
+/*
+ * This code is based on the strip-ansi library by Chalk.
+ * Source: https://github.com/chalk/strip-ansi
+ */
+
+function ansiRegex({ onlyFirst = false } = {}) {
+  const pattern = [
+    '[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]+)*|[a-zA-Z\\d]+(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*)?\\u0007)',
+    '(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PR-TZcf-nq-uy=><~]))',
+  ].join('|');
+
+  return new RegExp(pattern, onlyFirst ? undefined : 'g');
+}
+
+function stripAnsi(string) {
+  if (typeof string !== 'string') {
+    throw new TypeError(`Expected a \`string\`, got \`${typeof string}\``);
+  }
+
+  // Even though the regex is global, we don't need to reset the `.lastIndex`
+  // because unlike `.exec()` and `.test()`, `.replace()` does it automatically
+  // and doing it manually has a performance penalty.
+  const regex = ansiRegex();
+  return string.replace(regex, '');
+}
+
+module.exports = stripAnsi;

lib/utils/tests/stripAnsi.test.js

@@ -0,0 +1,48 @@
+/* eslint-env jest */
+'use strict';
+
+const stripAnsi = require('../stripAnsi');
+
+describe('stripAnsi tests', () => {
+  it('It should handle an empty string', () => {
+    const output = stripAnsi('');
+    expect(output).toBe('');
+  });
+
+  it('It should return the same string if there are no ANSI codes', () => {
+    const input = 'Hello';
+    const output = stripAnsi(input);
+    expect(output).toBe('Hello');
+  });
+
+  it('It should remove ANSI codes from a string', () => {
+    const input = '\u001B[4mHello\u001B[0m';
+    const output = stripAnsi(input);
+    expect(output).toBe('Hello');
+  });
+
+  it('It should strip color from string', () => {
+    const input = '\u001B[0m\u001B[4m\u001B[42m\u001B[31mHe\u001B[39m\u001B[49m\u001B[24mllo\u001B[0m';
+    const output = stripAnsi(input);
+    expect(output).toBe('Hello');
+  });
+
+  it('It should strip color from ls command', () => {
+    const input =
+      '\u001B[00m\u001B[01;34mHello\u001B[00m';
+    const output = stripAnsi(input);
+    expect(output).toBe('Hello');
+  });
+
+  it('It should reset;setfg;setbg;italics;strike;underline sequence from string', () => {
+    const input = '\u001B[0;33;49;3;9;4mHello\u001B[0m';
+    const output = stripAnsi(input);
+    expect(output).toBe('Hello');
+  });
+
+  it('It should strip link from terminal link', () => {
+    const input = '\u001B]8;;https://github.com\u0007click\u001B]8;;\u0007';
+    const output = stripAnsi(input);
+    expect(output).toBe('click');
+  });
+});

package.json

@@ -43,8 +43,7 @@
     "lodash.foreach": "^4.5.0",
     "lodash.frompairs": "^4.0.1",
     "lodash.get": "^4.4.2",
-    "lodash.topairs": "^4.3.0",
-    "strip-ansi": "^6.0.1"
+    "lodash.topairs": "^4.3.0"
   },
   "devDependencies": {
     "@types/babel__traverse": "7.0.6",

tsconfig.json

@@ -33,7 +33,7 @@
     "spec",
     "examples",
     "dist",
-    "tests",
+    "**/tests",
     "coverage"
   ]
 }