nginx-binaries/lib/repoIndex.js

A downloader for nginx and njs standalone binaries.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.formatQuery = exports.queryIndex = exports.getIndex = exports.FORMAT_VERSION = void 0;
const FS = require("node:fs");
const path = require("node:path");
const node_fetch_1 = require("node-fetch");
const semver = require("semver");
const archName_1 = require("./internal/archName");
const fetch_1 = require("./internal/fetch");
const logger_1 = require("./logger");
/**
 * Expected version of the index file.
 * Keep in sync with FORMAT_VERSION in scripts/generate-index!
 */
exports.FORMAT_VERSION = 2;
async function getIndex(repoUrl, cacheDir, fetchTimeout, cacheMaxAge) {
    const cachedIndexPath = path.join(cacheDir, 'index.json');
    const readCachedIndex = () => JSON.parse(FS.readFileSync(cachedIndexPath, 'utf8'));
    let isCached = false;
    try {
        if (Date.now() - FS.statSync(cachedIndexPath).mtimeMs < cacheMaxAge * 60000) {
            logger_1.log.debug(`Using cached index ${cachedIndexPath}`);
            return readCachedIndex();
        }
        isCached = true;
    }
    catch {
        // ignore
    }
    try {
        logger_1.log.debug(`Fetching ${repoUrl}/index.json`);
        const index = await (0, fetch_1.fetchJson)(`${repoUrl}/index.json`, { timeout: fetchTimeout });
        FS.mkdirSync(cacheDir, { recursive: true });
        FS.writeFileSync(cachedIndexPath, JSON.stringify(index, null, 2));
        return index;
    }
    catch (err) {
        if (isCached && err instanceof node_fetch_1.FetchError && err.type === 'system') {
            logger_1.log.warn('Failed to refresh repository index, using stale index');
            return readCachedIndex();
        }
        throw err;
    }
}
exports.getIndex = getIndex;
function queryIndex(index, name, query) {
    logger_1.log.debug(`Looking for ${name} binary matching ${(0, exports.formatQuery)(query)}`);
    return index.contents
        .filter(x => x.name === name)
        .filter(queryFilter(query))
        .sort((a, b) => semver.rcompare(a.version, b.version));
}
exports.queryIndex = queryIndex;
const formatQuery = (query) => JSON.stringify(query)
    .replace(/"/g, '')
    .replace(/,/g, ', ')
    .replace(/:/g, ': ');
exports.formatQuery = formatQuery;
const queryFilter = (query) => (meta) => objKeys(query).every(key => {
    return query[key] === undefined ? false
        : key === 'version' ? semver.satisfies(meta[key], query[key])
            : key === 'arch' ? (0, archName_1.normalizeArch)(query[key]) === meta[key]
                : query[key] === meta[key];
});
const objKeys = (obj) => Object.keys(obj);
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