Port Jekyll posts to Grav CMS

jekyll-to-grav.js

const fs = require('fs');
const glob = require('glob');
const fm = require('front-matter');
const path = require('path');
const write = require('write');

glob("!(node_modules)/**/*.md", {}, (err, files) => {
  files.forEach((file) => {
    fs.readFile(file, 'utf8', (err, data) => {
      if (err) throw err;
      let content = fm(data);
      let fname = path.basename(file);
      let fdate = fname.substring(0,10);
      let slug = fname.substring(11).split('.md')[0];
      // take the date from the filename and stick it in our yaml object
      content.attributes.date = fdate;

      // manually create the lines of our new md file with frontmatter
      let lines = [];
      lines.push('---');
      Object.keys(content.attributes).forEach(key => {
        let value = content.attributes[key];
        if (typeof value === 'string') {
          // tidy up titles that contain double quotes as we're gonna wrap them in the output
          value = value.replace(/\"/g, '"');
        }
        lines.push(`${key}: "${value}"`);
      });
      lines.push('---');
      lines.push(content.body);

      // post.md because we're using a template called post.twig.html in Grav
      write(`blog/${slug}/post.md`, lines.join('\n'), (err) => {
        if (err) throw err;
        console.log(`Wrote file: ${slug}/post.md`);
      });
    });
  });
});

Stick it in your _posts directory, install the dependencies (npm install glob front-matter write) and then run it node jekyll-to-grav.js, it will create Grav compatible files in blog/, which can then be uploaded. If you use a different filename for your blog post template in Grav, change post.md to [whatever].md in this script.