123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// Copyright Joyent and Node contributors. All rights reserved. MIT license.import { sprintf } from "../../../fmt/printf.ts";import { inspect } from "./inspect.mjs";
// `debugImpls` and `testEnabled` are deliberately not initialized so any call// to `debuglog()` before `initializeDebugEnv()` is called will throw.let debugImpls: Record<string, (...args: unknown[]) => void>;let testEnabled: (str: string) => boolean;
// `debugEnv` is initial value of process.env.NODE_DEBUGfunction initializeDebugEnv(debugEnv: string) {  debugImpls = Object.create(null);  if (debugEnv) {    // This is run before any user code, it's OK not to use primordials.    debugEnv = debugEnv.replace(/[|\\{}()[\]^$+?.]/g, "\\$&")      .replaceAll("*", ".*")      .replaceAll(",", "$|^");    const debugEnvRegex = new RegExp(`^${debugEnv}$`, "i");    testEnabled = (str) => debugEnvRegex.exec(str) !== null;  } else {    testEnabled = () => false;  }}
// Emits warning when user sets// NODE_DEBUG=http or NODE_DEBUG=http2.function emitWarningIfNeeded(set: string) {  if ("HTTP" === set || "HTTP2" === set) {    console.warn(      "Setting the NODE_DEBUG environment variable " +        "to '" + set.toLowerCase() + "' can expose sensitive " +        "data (such as passwords, tokens and authentication headers) " +        "in the resulting log.",    );  }}
const noop = () => {};
function debuglogImpl(  enabled: boolean,  set: string,): (...args: unknown[]) => void {  if (debugImpls[set] === undefined) {    if (enabled) {      emitWarningIfNeeded(set);      debugImpls[set] = function debug(...args: unknown[]) {        const msg = args.map((arg) => inspect(arg)).join(" ");        console.error(sprintf("%s %s: %s", set, String(Deno.pid), msg));      };    } else {      debugImpls[set] = noop;    }  }
  return debugImpls[set];}
// debuglogImpl depends on process.pid and process.env.NODE_DEBUG,// so it needs to be called lazily in top scopes of internal modules// that may be loaded before these run time states are allowed to// be accessed.export function debuglog(  set: string,  cb: (debug: (...args: unknown[]) => void) => void,) {  function init() {    set = set.toUpperCase();    enabled = testEnabled(set);  }
  let debug = (...args: unknown[]): void => {    init();    // Only invokes debuglogImpl() when the debug function is    // called for the first time.    debug = debuglogImpl(enabled, set);
    if (typeof cb === "function") {      cb(debug);    }
    return debug(...args);  };
  let enabled: boolean;  let test = () => {    init();    test = () => enabled;    return enabled;  };
  const logger = (...args: unknown[]) => debug(...args);
  Object.defineProperty(logger, "enabled", {    get() {      return test();    },    configurable: true,    enumerable: true,  });
  return logger;}
let debugEnv;try {  debugEnv = Deno.env.get("NODE_DEBUG") ?? "";} catch (error) {  if (error instanceof Deno.errors.PermissionDenied) {    debugEnv = "";  } else {    throw error;  }}initializeDebugEnv(debugEnv);
export default { debuglog };