* Remove ecmaScript rule

* Remove rest/spread on import
* Add fixer

Author: Ross Solomon

lib/rules/jsx-closing-tag-location.js

@@ -10,13 +10,39 @@
 module.exports = {
   meta: {
     docs: {
-      description: 'Validate closing tag location in JSX',
+      description: 'Validate closing tag location for multiline JSX',
       category: 'Stylistic Issues',
       recommended: false
-    }
+    },
+    fixable: 'whitespace'
   },
 
   create: function(context) {
+    var sourceCode = context.getSourceCode();
+
+    /**
+     * Checks if the node is the first in its line, excluding whitespace.
+     * @param {ASTNode} node The node to check
+     * @return {Boolean} true if its the first node in its line
+     */
+    function isNodeFirstInLine(node) {
+      let token = node;
+      let lines;
+      do {
+        token = sourceCode.getTokenBefore(token);
+        lines = token.type === 'JSXText'
+          ? token.value.split('\n')
+          : null;
+      } while (
+        token.type === 'JSXText' &&
+        /^\s*$/.test(lines[lines.length - 1])
+      );
+
+      var startLine = node.loc.start.line;
+      var endLine = token ? token.loc.end.line : -1;
+      return startLine !== endLine;
+    }
+
     return {
       JSXClosingElement: function(node) {
         if (!node.parent) {
@@ -32,10 +58,28 @@ module.exports = {
           return;
         }
 
+        let message;
+        if (!isNodeFirstInLine(node)) {
+          message = 'Closing tag of a multiline JSX expression must be on its own line.';
+        } else {
+          message = 'Expected closing tag to match indentation of opening.';
+        }
+
         context.report({
           node: node,
           loc: node.loc,
-          message: 'Expected closing tag to match indentation of opening.'
+          message,
+          fix: function(fixer) {
+            const indent = Array(opening.loc.start.column + 1).join(' ');
+            if (isNodeFirstInLine(node)) {
+              return fixer.replaceTextRange(
+                [node.start - node.loc.start.column, node.start],
+                indent
+              );
+            }
+
+            return fixer.insertTextBefore(node, `\n${indent}`);
+          }
         });
       }
     };

tests/lib/rules/jsx-closing-tag-location.js

@@ -9,9 +9,8 @@
 // ------------------------------------------------------------------------------
 
 const rule = require('../../../lib/rules/jsx-closing-tag-location');
-const {RuleTester} = require('eslint');
+const RuleTester = require('eslint').RuleTester;
 const parserOptions = {
-  ecmaVersion: 8,
   sourceType: 'module',
   ecmaFeatures: {
     experimentalObjectRestSpread: true,
@@ -20,6 +19,7 @@ const parserOptions = {
 };
 
 const MESSAGE_MATCH_INDENTATION = [{message: 'Expected closing tag to match indentation of opening.'}];
+const MESSAGE_OWN_LINE = [{message: 'Closing tag of a multiline JSX expression must be on its own line.'}];
 
 // ------------------------------------------------------------------------------
 // Tests
@@ -45,12 +45,22 @@ ruleTester.run('jsx-closing-tag-location', rule, {
       '  foo',
       '  </App>'
     ].join('\n'),
+    output: [
+      '<App>',
+      '  foo',
+      '</App>'
+    ].join('\n'),
     errors: MESSAGE_MATCH_INDENTATION
   }, {
     code: [
       '<App>',
       '  foo</App>'
     ].join('\n'),
-    errors: MESSAGE_MATCH_INDENTATION
+    output: [
+      '<App>',
+      '  foo',
+      '</App>'
+    ].join('\n'),
+    errors: MESSAGE_OWN_LINE
   }]
 });