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import showdown from "showdown";
import yaml from "yaml";
import { promises as fs } from "fs";
const posts = await fs.readdir("posts");
function splitPostHeader(postData: string): [string, string] {
if (postData.startsWith("---\n")) {
const headerEndIndex = postData.indexOf("\n---\n", 4);
return [
postData.substring(4, headerEndIndex),
postData.substring(headerEndIndex + 5),
];
}
return ["", postData];
}
await fs.rm("build", { recursive: true });
await fs.mkdir("build");
declare interface PostMetadata {
name: string;
unlisted?: boolean;
tags?: Array<string>;
description?: string;
}
const baseTemplate = await fs.readFile("template.html", { encoding: "utf-8" });
function makeHtmlForPost(postMetadata: PostMetadata, markdown: string): string {
const converter = new showdown.Converter();
const htmlPostBody = converter.makeHtml(markdown);
const variables = {
postBody: htmlPostBody,
title: postMetadata.name,
};
return baseTemplate.replace(
/%([a-zA-Z]+)%/g,
(_, match) => variables[match] ?? `Missing variable: ${match}`,
);
}
for (let postPath of posts) {
const totalPostPath = `posts/${postPath}`;
if (!postPath.endsWith(".md")) {
await fs.copyFile(totalPostPath, `build/${postPath}`);
continue;
}
const postText = await fs.readFile(totalPostPath, { encoding: "utf-8" });
const [postHeader, postBody] = splitPostHeader(postText);
const postMetadata = yaml.parse(postHeader) as PostMetadata;
const postHtml = makeHtmlForPost(postMetadata, postBody);
const targetPath = `build/${postPath.replace(".md", ".html")}`;
fs.writeFile(targetPath, postHtml, { encoding: "utf-8" });
}
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