[ReactNative] Bring back support for FB-specific transforms for lint

lint/linterTransform.js

@@ -0,0 +1,76 @@
+'use strict';
+
+var eslint = require('eslint');
+
+var ignoredStylisticRules = {
+  'key-spacing': false,
+  'comma-spacing': true,
+  'no-multi-spaces': true,
+  'brace-style': true,
+  'camelcase': true,
+  'consistent-this': true,
+  'eol-last': true,
+  'func-names': true,
+  'func-style': true,
+  'new-cap': true,
+  'new-parens': true,
+  'no-nested-ternary': true,
+  'no-array-constructor': true,
+  'no-lonely-if': true,
+  'no-new-object': true,
+  'no-spaced-func': true,
+  'no-space-before-semi': true,
+  'no-ternary': true,
+  'no-trailing-spaces': true,
+  'no-underscore-dangle': true,
+  'no-wrap-func': true,
+  'no-mixed-spaces-and-tabs': true,
+  'quotes': true,
+  'quote-props': true,
+  'semi': true,
+  'sort-vars': true,
+  'space-after-keywords': true,
+  'space-in-brackets': true,
+  'space-in-parens': true,
+  'space-infix-ops': true,
+  'space-return-throw-case': true,
+  'space-unary-word-ops': true,
+  'max-nested-callbacks': true,
+  'one-var': true,
+  'wrap-regex': true,
+  'curly': true,
+  'no-mixed-requires': true,
+};
+
+function setLinterTransform(transformSource) {
+  var originalVerify = eslint.linter.verify;
+  eslint.linter.verify = function(text, config, filename, saveState) {
+    var transformedText;
+    try {
+      transformedText = transformSource(text);
+    } catch (e) {
+      return [{
+        severity: 2,
+        line: e.lineNumber,
+        message: e.message,
+        source: text
+      }];
+    }
+    var originalLines = text.split('\n');
+    var transformedLines = transformedText.split('\n');
+    var warnings = originalVerify.call(eslint.linter, transformedText, config, filename, saveState);
+
+    // JSX and ES6 transforms usually generate pretty ugly code. Let's skip lint warnings
+    // about code style for lines that have been changed by transform step.
+    // Note that more important issues, like use of undefined vars, will still be reported.
+    return warnings.filter(function(error) {
+      var lineHasBeenTransformed = originalLines[error.line - 1] !== transformedLines[error.line - 1];
+      var shouldIgnore = ignoredStylisticRules[error.ruleId] && lineHasBeenTransformed;
+      return !shouldIgnore;
+    });
+  };
+}
+
+module.exports = {
+  setLinterTransform: setLinterTransform,
+};

linter.js

@@ -1,83 +1,10 @@
 // Copyright 2012-present Facebook. All Rights Reserved.
 'use strict';
 
-var eslint = require('eslint');
 var transformSource = require('./jestSupport/scriptPreprocess.js').transformSource;
+var linterTransform = require('./lint/linterTransform');
 
-var ignoredStylisticRules = {
-  'key-spacing': false,
-  'comma-spacing': true,
-  'no-multi-spaces': true,
-  'brace-style': true,
-  'camelcase': true,
-  'consistent-this': true,
-  'eol-last': true,
-  'func-names': true,
-  'func-style': true,
-  'new-cap': true,
-  'new-parens': true,
-  'no-nested-ternary': true,
-  'no-array-constructor': true,
-  'no-lonely-if': true,
-  'no-new-object': true,
-  'no-spaced-func': true,
-  'no-space-before-semi': true,
-  'no-ternary': true,
-  'no-trailing-spaces': true,
-  'no-underscore-dangle': true,
-  'no-wrap-func': true,
-  'no-mixed-spaces-and-tabs': true,
-  'quotes': true,
-  'quote-props': true,
-  'semi': true,
-  'sort-vars': true,
-  'space-after-keywords': true,
-  'space-in-brackets': true,
-  'space-in-parens': true,
-  'space-infix-ops': true,
-  'space-return-throw-case': true,
-  'space-unary-word-ops': true,
-  'max-nested-callbacks': true,
-  'one-var': true,
-  'wrap-regex': true,
-  'curly': true,
-  'no-mixed-requires': true,
-};
-
-/*
- * Currently ESLint does not understand ES6+React-flavoured syntax.
- * To make it work on our codebase, we monkey-patch `verify` function
- * to do a transform before running lint rules.
- *
- * If future, as ESLint's support for ES6 expands, we can get rid of this
- * hack
- */
-var originalVerify = eslint.linter.verify;
-eslint.linter.verify = function(text, config, filename, saveState) {
-  var transformedText;
-  try {
-    transformedText = transformSource(text);
-  } catch (e) {
-    return [{
-      severity: 2,
-      line: e.lineNumber,
-      message: e.message,
-      source: text
-    }];
-  }
-  var originalLines = text.split('\n');
-  var transformedLines = transformedText.split('\n');
-  var warnings = originalVerify.call(eslint.linter, transformedText, config, filename, saveState);
-
-  // JSX and ES6 transforms usually generate pretty ugly code. Let's skip lint warnings
-  // about code style for lines that have been changed by transform step.
-  // Note that more important issues, like use of undefined vars, will still be reported.
-  return warnings.filter(function(error) {
-    var lineHasBeenTransformed = originalLines[error.line - 1] !== transformedLines[error.line - 1];
-    var shouldIgnore = ignoredStylisticRules[error.ruleId] && lineHasBeenTransformed;
-    return !shouldIgnore;
-  });
-};
+linterTransform.setLinterTransform(transformSource);
 
 // Run the original CLI
 require('eslint/bin/eslint');