markdown内のjsonコードブロックを拾ってjsonlintかけてくれる君

demo.sh

~sand/markdown-json-lint $ node index.js sample.md
Parse error on line 1:
{ "b: 'a' }
--^
Expecting 'STRING', '}', got 'undefined'
Parse error on line 1:
{ "x: 2 }
--^
Expecting 'STRING', '}', got 'undefined'
~sand/markdown-json-lint $ node index.js sample2.md
~sand/markdown-json-lint $

markdown-json-lint.js

var glob = require("glob");
var fs = require("fs");
var mdParser = require("markdown-to-ast");
var jsonParser = require("jsonlint").parser;

var filepattern = process.argv[2];
var filenames = glob.sync(filepattern)

var isError = false
filenames.forEach(function(filename) {
  console.log(filename);
  var markdown = fs.readFileSync(filename, "utf8");
  var AST = mdParser.parse(markdown);
  var jsons = findJsons(AST, []);
  isError = checkJsons(jsons) || isError;
});

if(isError) {
  process.exit(1);
}

function findJsons(node, acc) {
  if(node.type == "CodeBlock" && node.lang == "json") {
    acc.push(node.value);
  }

  if(node.children) {
    node.children.forEach(function(e) {
      findJsons(e, acc);
    });
  }

  return acc;
}

function checkJsons(jsons) {
  var isError=false;
  jsons.forEach(function(j) {
    try {
      jsonParser.parse(j);
    } catch (e) {
      isError=true;
      console.log(e.message);
    }
  });
  return isError;
}

package.json

{
  "name": "markdown-json-lint",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "jsonlint": "^1.6.2",
    "markdown-to-ast": "^3.2.3",
    "node-glob": "^1.2.0"
  }
}

sample.md

this is a chapter

here text

aaa

{ "a": 1 }

<?php
echo 'ok';

{ "b: 'a' }

{ "b": 2 }

{ "x: 2 }

yeah

sample2.md

this is a chapter

here text

aaa

{ "a": 1 }

<?php
echo 'ok';

{ "b": "a" }

{ "b": 2 }

{ "x": 3.2 }

yeah