feat(eslint): Add ignoreParsingErrors option (#16)

This adds the ability to ignore parsing errors without comments.

Author: lilaconlee

README.md

@@ -32,6 +32,19 @@ Sometimes, we want to write broken JavaScript code into a JS CodeBlock for synta
 
     <!-- textlint-enable eslint -->
 
+To ignore ESLint parsing errors that cannot be ignored from the config file, you can use `ignoreParsingErrors`:
+
+```js
+{
+    "rules": {
+        "eslint": {
+          "configFile": "path/to/.eslintrc"
+          "ignoreParsingErrors": true
+        }
+    }
+}
+```
+
 ## Installation
 
 Install with [npm](https://www.npmjs.com/):
@@ -68,6 +81,9 @@ textlint --rule eslint README.md
 - `langs`: `string[]`
     - Default: `["js", "javascript", "node", "jsx"]`
     - recognize lang of CodeBlock
+- `ignoreParsingErrors`: `Boolean`
+    - Default: `false`
+    - ignore ESLint parsing errors while still reporting other ESLint errors
 
 ```js
 {
@@ -77,6 +93,8 @@ textlint --rule eslint README.md
             "configFile": "path/to/.eslintrc",
             // recognize lang of CodeBlock
             "langs": ["js", "javascript", "node", "jsx"]
+            // Ignore ESLint parsing errors
+            "ignoreParsingErrors": true
         }
     }
 }

src/textlint-rule-eslint.js

@@ -53,6 +53,10 @@ const reporter = (context, options) => {
 
                      ESLint message line and column start with 1
                      */
+                    if (options.ignoreParsingErrors && message.message.includes("Parsing error")) {
+                      return;
+                    }
+
                     const prefix = message.ruleId ? `${message.ruleId}: ` : "";
                     if (message.fix) {
                         const paddingIndex = raw.indexOf(code);

test/textlint-rule-eslint-test.js

@@ -31,6 +31,15 @@ tester.run("textlint-rule-eslint", rule, {
                    configFile: configFilePath
             }
         },
+        {
+            text: "```js\n\n" +
+            "+++1+++\n" +
+            "```",
+            options: {
+                   configFile: configFilePath,
+                   ignoreParsingErrors: true
+            }
+        },
     ],
     invalid: [
         {