feature: @putout/processor-markdown: add support frontmatter

Author: coderaiser

packages/processor-markdown/lib/markdown.js

@@ -1,23 +1,22 @@
 import {toJS, fromJS} from '@putout/operator-json';
 import stringify from 'remark-stringify';
 import preset from 'remark-preset-lint-consistent';
+import remarkFrontmatter from 'remark-frontmatter';
 import {visit} from 'unist-util-visit';
 import {unified} from 'unified';
+import remarkParse from 'remark-parse';
 import removeDependenciesStatusBadge from './rules/remove-dependencies-status-badge.js';
 import removeTrailingWhitespacesFromHeading from './rules/remove-trailing-whitespaces-from-heading.js';
 import mergeHeadingSpceces from './rules/merge-heading-spaces.js';
 import {run} from './rules/index.js';
 import {toPlace} from './parse-place.js';
-import {initParseStore} from './parse-store.js';
 
 const plugins = [
     removeDependenciesStatusBadge,
     removeTrailingWhitespacesFromHeading,
     mergeHeadingSpceces,
 ];
 
-const parseStore = initParseStore();
-
 const text = ({value}) => value;
 
 const stringifyOptions = {
@@ -32,13 +31,11 @@ const stringifyOptions = {
 
 export const files = ['*.md'];
 export const find = async (rawSource, options = {}) => {
-    await parseStore.init();
-    
     if (!rawSource.length)
         return [];
 
     const {messages} = await unified()
-        .use(parseStore)
+        .use(remarkParse)
         .use(preset)
         .use(run, {
             fix: false,
@@ -48,24 +45,24 @@ export const find = async (rawSource, options = {}) => {
             ],
         })
         .use(stringify, stringifyOptions)
+        .use(remarkFrontmatter, ['yaml', 'toml'])
         .process(rawSource);
 
     return messages.map(toPlace);
 };
 export const fix = async (rawSource, options = {}) => {
-    await parseStore.init();
-    
     const {value} = await unified()
-        .use(parseStore)
+        .use(remarkParse)
         .use(preset)
+        .use(stringify, stringifyOptions)
+        .use(remarkFrontmatter, ['yaml', 'toml'])
         .use(run, {
             fix: true,
             plugins: [
                 ...plugins,
                 ...options.plugins || [],
             ],
         })
-        .use(stringify, stringifyOptions)
         .process(rawSource);
 
     return value;
@@ -74,7 +71,7 @@ export const branch = async (rawSource) => {
     const list = [];
 
     await unified()
-        .use(parseStore)
+        .use(remarkParse)
         .use(collect, {
             list,
             visit,
@@ -88,7 +85,7 @@ export const merge = async (rawSource, list) => {
     const newList = list.slice();
 
     const {value} = await unified()
-        .use(parseStore)
+        .use(remarkParse)
         .use(apply, {
             list: newList,
             rawSource,
@@ -97,15 +94,12 @@ export const merge = async (rawSource, list) => {
         .use(stringify, stringifyOptions)
         .process(rawSource);
 
-    await parseStore.clear();
-    
     return value;
 };
 
 const collect = ({list, visit}) => (node) => {
     visit(node, 'code', (node) => {
         const {lang, value} = node;
-        
         const startLine = node.position.start.line;
 
         if (/^(js|javascript)$/.test(lang)) {

packages/processor-markdown/lib/parse-store.js

@@ -7,8 +7,7 @@
   "homepage": "https://github.com/coderaiser/putout/tree/master/packages/processor-markdown#readme",
   "main": "./lib/markdown.js",
   "exports": {
-    ".": "./lib/markdown.js",
-    "./parse-store": "./lib/parse-store.js"
+    ".": "./lib/markdown.js"
   },
   "release": false,
   "tag": false,
@@ -31,6 +30,7 @@
   "dependencies": {
     "@putout/operator-json": "^2.0.0",
     "once": "^1.4.0",
+    "remark-frontmatter": "^5.0.0",
     "remark-parse": "^11.0.0",
     "remark-preset-lint-consistent": "^6.0.0",
     "remark-stringify": "^11.0.0",

packages/processor-markdown/package.json

@@ -0,0 +1,6 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: needs clarification
+---

packages/processor-markdown/test/fixture/frontmatter.md

@@ -155,3 +155,7 @@ test('putout: processor: markdown: merge-heading-spaces: comparePlaces', async (
 test('putout: processor: markdown: compare places: empty', async ({comparePlaces}) => {
     await comparePlaces('empty', []);
 });
+
+test('putout: processor: markdown: compare places: frontmatter', async ({noProcess}) => {
+    await noProcess('frontmatter');
+});