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const { noColor } = Deno;
const START = noColor ? "" : "\x1b[999D\x1b[K";const END = noColor ? "\n" : "";
const encoder = new TextEncoder();
export class Progress {  n: number;  step = -1;  writer: Deno.Writer;
  constructor(n: number, writer: Deno.Writer = Deno.stdout) {    this.n = n;    this.writer = writer;  }  async log(msg: string) {    // We expect but don't enforce that msg doesn't contain \n.    const line = `${START}[${this.step + 1}/${this.n}] ${msg}${END}`;    const b = encoder.encode(line);    await this.writer.write(b);  }}
export class SilentProgress extends Progress {  async log(_: string) {}}