the home site for me: also iteration 3 or 4 of my site
dunkirk.sh
1import puppeteer from "puppeteer";
2import { readdir, mkdir } from "node:fs/promises";
3
4const template = await Bun.file("tools/og.html").text();
5
6const browser = await puppeteer.launch();
7
8async function og(
9 postname: string,
10 outputPath: string,
11 width = 1200,
12 height = 630,
13) {
14 const page = await browser.newPage();
15
16 await page.setViewport({ width, height });
17
18 await page.setContent(template.toString().replace("{{postname}}", postname));
19
20 await page.screenshot({ path: outputPath });
21}
22
23async function fileExists(path: string): Promise<boolean> {
24 try {
25 await Bun.file(path);
26 return true;
27 } catch (e) {
28 return false;
29 }
30}
31
32try {
33 // check if the public/blog folder exists
34 // if not exit
35 // if it does, get all the folders and then get the title tag from the index.html
36
37 if (!(await fileExists("public/"))) {
38 console.error("public/ does not exist");
39 process.exit(1);
40 }
41
42 // read all the files in the current directory filtering for index.htmls
43 const files = (await readdir("public/", { recursive: true })).filter((file) =>
44 file.endsWith("index.html"),
45 );
46
47 const directories = new Set(
48 files.map((file) => file.replace("index.html", "")),
49 );
50
51 const existing = (await readdir("static/")).filter((file) =>
52 directories.has(file),
53 );
54
55 // create not existing
56 for (const dir of directories) {
57 if (!existing.includes(dir)) {
58 await mkdir(`static/${dir.split("/").slice(0, -1).join("/")}`, {
59 recursive: true,
60 });
61 }
62 }
63
64 console.log("Generating OG images for", files.length, "files");
65
66 // for each file, get the title tag from the index.html
67 for (const file of files) {
68 const index = await Bun.file(`public/${file}`).text();
69 let title: string;
70 if (file.startsWith("tags/")) {
71 const parts = file.split("/");
72 title = `Tag: ${parts[1]}`; // take the next directory as the title
73 } else {
74 const match = index.match(/<title>(.*?)<\/title>/);
75 if (match) {
76 title = match[1];
77 } else {
78 console.error(`No title found for ${file}`);
79 continue;
80 }
81 }
82
83 console.log("Generating OG for", title);
84 await og(title, `static/${file.replace("index.html", "og.png")}`);
85 }
86} catch (e) {
87 console.error(e);
88} finally {
89 await browser.close();
90}