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#! /usr/bin/env -S deno run --allow-net --allow-run
// @ts-check// Finds and outputs Ruck’s minimum compatible Deno version, by binary searching// Deno versions for the oldest that the tests (and types) pass with.
/** * Async binary search. * @see https://stackoverflow.com/a/41956372 * @template T * @param {Array<T>} array * @param {(item: T) => boolean | Promise<boolean>} predicate Sync or async *   function that returns if the item is a match. * @returns {Promise<number>} Array index of the found item. */async function binarySearch(array, predicate) {  let min = -1;  let max = array.length;
  while (1 + min < max) {    const mid = min + ((max - min) >> 1);
    if (await predicate(array[mid])) max = mid;    else min = mid;  }
  return max;}
/** * Installs a particular version of Deno. * @param {string} version Deno version. SemVer without a leading `v`. */async function installDenoVersion(version) {  const process = Deno.run({ cmd: ["deno", "upgrade", "--version", version] });  const status = await process.status();  if (!status.success) throw new Error("Deno installation failed.");}
const response = await fetch(  "https://raw.githubusercontent.com/denoland/dotland/main/versions.json",);const json = await response.json();
/** * Deno versions. SemVer with a leading `v`. * @type {Array<string>} */const denoVersions = json.cli;
/** Original Deno version. SemVer without a leading `v`. */const originalDenoVersion = Deno.version.deno;
/** * Minimum compatible Deno version. SemVer with a leading `v`. * @type {string | null} */let minCompatibleDenoVersion = null;
try {  const latestFailingDenoVersionIndex = await binarySearch(    denoVersions,    async (version) => {      console.log(`Installing Deno ${version}…`);      await installDenoVersion(version.replace(/^v/u, ""));
      console.log(`Testing Deno ${version}…`);      const process = Deno.run({ cmd: ["./scripts/test.sh"] });      const status = await process.status();      return !status.success;    },  );
  if (latestFailingDenoVersionIndex) {    minCompatibleDenoVersion = denoVersions[latestFailingDenoVersionIndex - 1];  }} finally {  console.log(`Restoring Deno v${originalDenoVersion}…`);  await installDenoVersion(originalDenoVersion);}
console.log(  minCompatibleDenoVersion    ? `Minimum compatible Deno version is ${minCompatibleDenoVersion}.`    : "No Deno version is compatible.",);