static-blog.ts

/// <reference path="../node_modules/@types/node/index.d.ts"/>
import * as fs from "fs";
import {join,resolve} from "path";
import marked = require("marked");
import handlebars = require("handlebars");
import mkdirp = require("mkdirp");

// retrieve a list of all the files in a given directory
function walkSync (dir:string, fileList?:string[]) {
    const files = fs.readdirSync(dir).map((x)=>join(resolve(dir),x));
    fileList = fileList || [];
    files.forEach((file) => {
        if(fs.statSync(file).isDirectory() && !/node_modules/.test(file)) fileList = walkSync(file, fileList);
        else fileList.push(file);
    });
    return fileList;
};

// parse markdown files
function parseMd (filePath:string) {
    const contents = fs.readFileSync(filePath,"utf8");
    const attrsMatch = contents.match(/<!--((.|\n)+)-->/);
    if(!attrsMatch) error(`file ${filePath} doesn't have any attributes`);
    let match:string[] = [];
    const attrs:{[key:string]:string} = {};
    const attrsRe = /(let|const|var)\s+(\w+)((\s?)+)=((\s?)+)("|')((\w?)+)("|');?/gi;
    while (match = attrsRe.exec(attrsMatch[0])) {
	    attrs[match[2]] = match[8];
    }
    const H1Matches = contents.match(/\s#\s?((.)+)\n/);
    if(!H1Matches) error(`file ${filePath} doesn't have any H1 titles`);
    attrs["title"] = H1Matches[0].replace(/^\s#/,"").trim();
    attrs["body"] = marked(contents);
    return attrs;
}

function error (msg:string) {
    console.error(msg);
    process.exit(1);
}

const allFiles = walkSync(process.cwd())
.filter(x=>x.endsWith(".md") || x.endsWith(".hbs"));
const handlebarsFiles = allFiles.filter(x=>x.endsWith(".hbs"));
const postsTemplate = fs.readFileSync(handlebarsFiles.find(x=>/post/i.test(x)),"utf8");
const homeTemplate = fs.readFileSync(handlebarsFiles.find(x=>/home/i.test(x)),"utf8");
const markdownFiles = allFiles.filter(x=>x.endsWith(".md")).map(parseMd);
const posts = markdownFiles.map(variables=>handlebars.compile(postsTemplate)(variables));
const home = handlebars.compile(homeTemplate)({"posts":markdownFiles});

fs.writeFileSync(join(process.cwd(),"index.html"),home);
mkdirp.sync(join(process.cwd(),"blog"))
posts.forEach((post,index)=>{
    fs.writeFileSync(join(process.cwd(),"blog",markdownFiles[index]["permlink"])+".html",post);
});