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// Copyright 2020-2021 the denosaurs team. All rights reserved. MIT license.
/** Regex to test if string matches version format */const reVersion = /^v?[0-9]+\.[0-9]+\.[0-9]+$/;
/** Map of supported flags that modify * `denon` behavior. */export interface Args {  help: boolean;  version: boolean;
  init?: string;  upgrade?: string;  config?: string;
  cmd: string[];}
/** Parse Deno.args into a flag map (`Args`) * to be handled by th CLI. */export function parseArgs(args: string[] = Deno.args): Args {  if (args[0] === "--") {    args = args.slice(1);  }
  const flags: Args = {    help: false,    version: false,    init: undefined,    upgrade: undefined,    config: undefined,    cmd: [],  };
  if ((args.includes("--config") || args.includes("-c")) && args.length > 1) {    flags.config = args[1];    args = args.slice(2);  }
  if (args.includes("--help") || args.includes("-h")) {    flags.help = true;    args = args.slice(1);  }
  if (args.includes("--version") || args.includes("-v")) {    flags.version = true;    args = args.slice(1);  }
  if (args.includes("--init") || args.includes("-i")) {    const index = args.includes("--init")      ? args.indexOf("--init")      : args.indexOf("-i");    const next = args[index + 1];
    if (next) {      flags.init = next;      args = args.slice(2);    } else {      flags.init = "json";      args = args.slice(1);    }  }
  if (args.includes("--upgrade") || args.includes("-u")) {    const index = args.includes("--upgrade")      ? args.indexOf("--upgrade")      : args.indexOf("-u");    const next = args[index + 1];
    if (next && (next === "latest" || reVersion.test(next))) {      flags.upgrade = !next.startsWith("v") || next !== "latest"        ? "v" + next        : next;      args = args.slice(2);    } else {      flags.upgrade = "latest";      args = args.slice(1);    }  }
  flags.cmd = args;  return flags;}