95 lines
2.2 KiB
JavaScript
95 lines
2.2 KiB
JavaScript
const semver = require("semver");
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const { fetch } = require("undici");
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const GIT_HASH_RE = /^[0-9a-fA-F]{40}$/;
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/**
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* @typedef VersionRange
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* @property {string} range
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* @property {boolean} isCanary
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*/
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/**
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* @typedef Version
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* @property {string} version
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* @property {boolean} isCanary
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*/
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/**
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* Parses the version from the user into a structure.
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*
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* @param {string | undefined} version
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* @returns {VersionRange | null}
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*/
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function parseVersionRange(version) {
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version = String(version) || "1.x";
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version = version.trim();
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if (version == "canary") {
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return { range: "latest", isCanary: true };
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}
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if (GIT_HASH_RE.test(version)) {
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return { range: version, isCanary: true };
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}
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const range = semver.validRange(version);
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if (range !== null) {
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return { range, isCanary: false };
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}
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return null;
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}
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/**
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* @param {VersionRange} range
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* @returns {Promise<Version | null>}
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*/
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async function resolveVersion({ range, isCanary }) {
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if (isCanary) {
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if (range === "latest") {
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const res = await fetch("https://dl.deno.land/canary-latest.txt");
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if (res.status !== 200) {
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throw new Error(
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"Failed to fetch canary version info from dl.deno.land. Please try again later.",
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);
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}
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const version = (await res.text()).trim();
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return { version, isCanary: true };
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}
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return { version: range, isCanary: true };
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}
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const res = await fetch("https://deno.com/versions.json");
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if (res.status !== 200) {
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throw new Error(
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"Failed to fetch stable version info from raw.githubusercontent.com. Please try again later.",
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);
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}
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const versionJson = await res.json();
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if (!("cli" in versionJson)) {
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throw new Error("Fetched stable version info is invalid.");
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}
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/** @type {string[]} */
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const versions = versionJson.cli;
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if (!Array.isArray(versions)) {
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throw new Error("Fetched stable version info is invalid.");
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}
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let version = semver.maxSatisfying(versions, range);
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if (version === null) {
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return null;
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}
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version = semver.clean(version);
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if (version === null) {
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return null;
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}
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return { version, isCanary: false };
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}
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module.exports = {
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parseVersionRange,
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resolveVersion,
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};
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