Breaking: Implement new processor API (fixes #138)

README.md

@@ -17,23 +17,29 @@ Install the plugin:
 npm install --save-dev eslint eslint-plugin-markdown
 ```
 
-Add it to your `.eslintrc`:
+Add it to your `.eslintrc` and enable the processor on Markdown files:
 
 ```json
 {
     "plugins": [
         "markdown"
+    ],
+    "overrides": [
+        {
+            "files": ["*.md"],
+            "processor": "markdown/markdown"
+        }
     ]
 }
 ```
 
 Run ESLint on `.md` files:
 
 ```sh
-eslint --ext md .
+eslint --ext js,md .
 ```
 
-It will lint `js`, `javascript`, `jsx`, or `node` [fenced code blocks](https://help.github.com/articles/github-flavored-markdown/#fenced-code-blocks) in your Markdown documents:
+It will lint [fenced code blocks](https://help.github.com/articles/github-flavored-markdown/#fenced-code-blocks) in your Markdown documents:
 
 ````markdown
 ```js
@@ -42,7 +48,9 @@ var answer = 6 * 7;
 console.log(answer);
 ```
 
-```JavaScript
+Here is some regular Markdown text that will be ignored.
+
+```js
 // This also gets linted
 
 /* eslint quotes: [2, "double"] */
@@ -54,17 +62,12 @@ hello();
 ```
 
 ```jsx
-// This gets linted too
+// This gets linted too if you enable --ext jsx
 var div = <div className="jsx"></div>;
 ```
-
-```node
-// And this
-console.log(process.version);
-```
 ````
 
-Blocks that don't specify either `js`, `javascript`, `jsx`, or `node` syntax are ignored:
+Blocks that don't specify a syntax are ignored:
 
 ````markdown
 ```

lib/index.js

@@ -9,9 +9,6 @@ const processor = require("./processor");
 
 module.exports = {
     processors: {
-        ".markdown": processor,
-        ".mdown": processor,
-        ".mkdn": processor,
-        ".md": processor
+        markdown: processor
     }
 };

lib/processor.js

@@ -8,7 +8,6 @@
 const unified = require("unified");
 const remarkParse = require("remark-parse");
 
-const SUPPORTED_SYNTAXES = ["js", "javascript", "node", "jsx"];
 const UNSATISFIABLE_RULES = [
     "eol-last", // The Markdown parser strips trailing newlines in code fences
     "unicode-bom" // Code blocks will begin in the middle of Markdown files
@@ -223,7 +222,7 @@ function preprocess(text) {
         code(node, parent) {
             const comments = [];
 
-            if (node.lang && SUPPORTED_SYNTAXES.indexOf(node.lang.split(" ")[0].toLowerCase()) >= 0) {
+            if (node.lang) {
                 let index = parent.children.indexOf(node) - 1;
                 let previousNode = parent.children[index];
 
@@ -253,11 +252,14 @@ function preprocess(text) {
         }
     });
 
-    return blocks.map(block => [
-        ...block.comments,
-        block.value,
-        ""
-    ].join("\n"));
+    return blocks.map((block, index) => ({
+        filename: `${index}.${block.lang}`,
+        text: [
+            ...block.comments,
+            block.value,
+            ""
+        ].join("\n")
+    }));
 }
 
 /**

tests/fixtures/eslintrc.json

@@ -0,0 +1,20 @@
+{
+    "root": true,
+    "env": {
+        "browser": true
+    },
+    "plugins": ["markdown"],
+    "overrides": [
+        {
+            "files": ["*.md", "*.mkdn", "*.mdown", "*.markdown", "*.custom"],
+            "processor": "markdown/markdown"
+        }
+    ],
+    "rules": {
+        "eol-last": "error",
+        "no-console": "error",
+        "no-undef": "error",
+        "quotes": "error",
+        "spaced-comment": "error"
+    }
+}

tests/fixtures/long.md

@@ -10,7 +10,7 @@ This is some code:
 console.log(42);
 ```
 
-```JavaScript
+```js
 // Comment
 function foo() {
     console.log("Hello");
@@ -20,7 +20,7 @@ function foo() {
 <!-- eslint-env node -->
 <!-- eslint-disable eol-last, quotes -->
 
-```node
+```js
 console.log(process.version);
 ```
 
@@ -34,7 +34,7 @@ How about some JSX?
 -->
 <!--eslint-disable no-console-->
 
-```jsx
+```js
 console.log("Error!");
 ```
 

tests/lib/plugin.js

@@ -18,19 +18,10 @@ const plugin = require("../..");
 function initCLI(isAutofixEnabled) {
     const fix = isAutofixEnabled || false;
     const cli = new CLIEngine({
-        envs: ["browser"],
-        extensions: ["md", "mkdn", "mdown", "markdown"],
-        plugins: ["markdown"],
         fix,
         ignore: false,
-        rules: {
-            "eol-last": 2,
-            "no-console": 2,
-            "no-undef": 2,
-            quotes: 2,
-            "spaced-comment": 2
-        },
-        useEslintrc: false
+        useEslintrc: false,
+        configFile: path.resolve(__dirname, "../fixtures/eslintrc.json")
     });
 
     cli.addPlugin("markdown", plugin);
@@ -133,6 +124,15 @@ describe("plugin", () => {
         assert.strictEqual(report.results[0].messages[0].line, 2);
     });
 
+    it("should run on files with any custom extension", () => {
+        const report = cli.executeOnText(shortText, "test.custom");
+
+        assert.strictEqual(report.results.length, 1);
+        assert.strictEqual(report.results[0].messages.length, 1);
+        assert.strictEqual(report.results[0].messages[0].message, "Unexpected console statement.");
+        assert.strictEqual(report.results[0].messages[0].line, 2);
+    });
+
     it("should extract blocks and remap messages", () => {
         const report = cli.executeOnFiles([path.resolve(__dirname, "../fixtures/long.md")]);
 
@@ -342,27 +342,6 @@ describe("plugin", () => {
             assert.strictEqual(actual, expected);
         });
 
-        it("in blocks with uncommon tags", () => {
-            const input = [
-                "This is Markdown.",
-                "",
-                "```JavaScript",
-                "console.log('Hello, world!')",
-                "```"
-            ].join("\n");
-            const expected = [
-                "This is Markdown.",
-                "",
-                "```JavaScript",
-                "console.log(\"Hello, world!\")",
-                "```"
-            ].join("\n");
-            const report = cli.executeOnText(input, "test.md");
-            const actual = report.results[0].output;
-
-            assert.strictEqual(actual, expected);
-        });
-
         it("in blocks with extra backticks", () => {
             const input = [
                 "This is Markdown.",