ZacharyZhang-NYandClaude Opus 5.5
912bc328cf
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
49 lines
1.8 KiB
JavaScript
49 lines
1.8 KiB
JavaScript
import { mkdirSync, mkdtempSync, writeFileSync } from "node:fs";
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import { tmpdir } from "node:os";
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import { join } from "node:path";
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import { crc32, deflateSync } from "node:zlib";
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function chunk(type, data) {
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const head = Buffer.alloc(8);
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head.writeUInt32BE(data.length);
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head.write(type, 4, "latin1");
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const sum = Buffer.alloc(4);
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sum.writeUInt32BE(crc32(Buffer.concat([head.subarray(4), data])));
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return Buffer.concat([head, data, sum]);
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}
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/** A gray PNG `side` pixels square whose data is one pixel, its scanline led by `filter`. */
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export function png(filter, side = 1) {
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const header = Buffer.from([0, 0, 0, side, 0, 0, 0, side, 8, 0, 0, 0, 0]);
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const image = deflateSync(Buffer.from([filter, 1]));
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return Buffer.concat([Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]), chunk("IHDR", header), chunk("IDAT", image), chunk("IEND", Buffer.alloc(0))]);
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}
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export const PNG = png(0);
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export const broken = Buffer.from(PNG);
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broken[broken.length - 20] ^= 0xff;
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export const good = {
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id: "tally",
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name: "Tally",
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author: "Ada",
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description: "Counts things.",
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category: "work",
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platforms: ["macOS", "Linux"],
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website: null,
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source: "https://github.com/ada/tally",
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publishedAt: "2026-10-04T00:00:00Z",
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previews: ["preview0.png"],
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};
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/** A catalog in a temp folder: one app, its files, and featured.json. */
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export function catalog({ app = good, folder = "tally", files = {}, featured = [] } = {}) {
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const root = mkdtempSync(join(tmpdir(), "showcase-"));
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const dir = join(root, "apps", folder);
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mkdirSync(dir, { recursive: true });
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writeFileSync(join(dir, "manifest.json"), JSON.stringify(app));
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writeFileSync(join(dir, "preview0.png"), PNG);
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for (const [name, body] of Object.entries(files)) writeFileSync(join(dir, name), body);
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writeFileSync(join(root, "featured.json"), JSON.stringify(featured));
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return root;
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}
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