1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859
import { join } from "https://deno.land/std@0.158.0/path/mod.ts";import { Tar } from "https://deno.land/std@0.158.0/archive/tar.ts";import { Buffer } from "https://deno.land/std@0.158.0/io/buffer.ts";import { copy } from "https://deno.land/std@0.158.0/streams/conversion.ts";import { parse as parseYAML } from "https://deno.land/std@0.158.0/encoding/yaml.ts";
interface Meta {  guid: string;}
export interface FileOptions {  root?: string;}
export class unitypackage {  private tar: Tar;
  constructor(private path: string) {    this.tar = new Tar();  }
  public async addFile(filename: string, options?: FileOptions) {    const root = options?.root ?? "Assets";    const _filename = join(this.path, filename);    const _metafile = _filename + ".meta";    const meta = parseYAML(await Deno.readTextFile(_metafile)) as Meta;    const pathname = new TextEncoder().encode([root, filename].join("/"));    await this.tar.append([meta.guid, "pathname"].join("/"), {      reader: new Buffer(pathname),      contentSize: pathname.byteLength,    });    await this.tar.append([meta.guid, "asset"].join("/"), {      filePath: _filename,    });    await this.tar.append([meta.guid, "asset.meta"].join("/"), {      filePath: _metafile,    });  }  public async addFiles(files: string[], options?: FileOptions) {    await Promise.all(      files.map(async (file) => {        await this.addFile(file, options);      })    );  }  public getReader() {    return this.tar.getReader();  }
  public async save(filename: string) {    const writer = await Deno.open(filename, {      write: true,      create: true,    });    await copy(this.getReader(), writer);    writer.close();  }}