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Deno cache injector
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| import { createHash } from "https://deno.land/std@0.95.0/hash/mod.ts"; | |
| import { ensureDirSync } from "https://deno.land/std@0.95.0/fs/ensure_dir.ts"; | |
| import { walkSync } from "https://deno.land/std@0.95.0/fs/walk.ts"; | |
| /* | |
| * Deno cache injector | |
| * cache algorithm is referenced from Deno source | |
| * https://github.com/denoland/deno/blob/main/cli/disk_cache.rs | |
| * https://github.com/denoland/deno/blob/main/cli/deno_dir.rs | |
| * | |
| * License is the same as Deno: MIT | |
| * https://github.com/denoland/deno/blob/main/LICENSE.md | |
| */ | |
| type ScriptLocation = { | |
| protocol: string; | |
| host: string; | |
| port: string | undefined; | |
| rest: string; | |
| }; | |
| if (Deno.args.length !== 2) { | |
| const scriptName = import.meta.url.replace(/.*\//, ""); | |
| console.log( | |
| `Usage: deno run --allow-env --allow-read --allow-write ${scriptName} <library path> <url prefix>`, | |
| ); | |
| console.log("Example:"); | |
| console.log("\tlibrary path: deno_std"); | |
| console.log("\turl prefix: https://deno.land/std@0.95.0"); | |
| Deno.exit(1); | |
| } | |
| const parseURL = (url: string): ScriptLocation => { | |
| const parsed = url.match(/(\w+):\/\/([^:\/]+)(?::(\d+))?(.*)/); | |
| if (!parsed) { | |
| throw new Error(`Malformed URL '${url}'`); | |
| } | |
| return { | |
| protocol: parsed[1], | |
| host: parsed[2], | |
| port: parsed[3], | |
| rest: parsed[4], | |
| }; | |
| }; | |
| const denoDir = () => { | |
| switch (Deno.build.os) { | |
| case "linux": | |
| return Deno.env.get("XDG_CACHE_HOME") ?? | |
| Deno.env.get("HOME") + "/.cache"; | |
| case "darwin": | |
| return Deno.env.get("HOME") + "/Library/Cache"; | |
| } | |
| }; | |
| const depsDir = denoDir() + "/deno/deps"; | |
| const process = (target: string, prefix: string) => { | |
| Deno.chdir(target); | |
| for (const e of walkSync(".")) { | |
| if (!e.isFile) { | |
| continue; | |
| } | |
| const url = prefix + "/" + e.path; | |
| const loc = parseURL(url); | |
| const host = loc.host + (loc.port ? "_PORT" + loc.port : ""); | |
| const dir = `${depsDir}/${loc.protocol}/${host}`; | |
| ensureDirSync(dir); | |
| const hasher = createHash("sha256"); | |
| hasher.update(loc.rest); | |
| const path = `${dir}/${hasher}`; | |
| Deno.copyFileSync(e.path, path); | |
| const mpath = path + ".metadata.json"; | |
| Deno.writeTextFileSync( | |
| mpath, | |
| JSON.stringify({ | |
| headers: {}, | |
| url, | |
| }), | |
| ); | |
| } | |
| }; | |
| process(Deno.args[0], Deno.args[1]); |
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