skypack
Version:
The Skypack SDK.
79 lines • 3.39 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.rollupPluginSkypack = void 0;
const cacache_1 = __importDefault(require("cacache"));
const util_1 = require("./util");
/**
* rollup-plugin-remote-cdn
*
* Load import URLs from a remote CDN, sitting behind a local cache. The local
* cache acts as a go-between for the resolve & load step: when we get back a
* successful CDN resolution, we save the file to the local cache and then tell
* rollup that it's safe to load from the cache in the `load()` hook.
*/
function rollupPluginSkypack({ sdk, logger }) {
const CACHED_FILE_ID_PREFIX = 'remote-pkg-cache:';
return {
name: 'snowpack:rollup-plugin-remote-cdn',
async resolveId(source, importer) {
let cacheKey;
if (source.startsWith(sdk.origin)) {
cacheKey = source;
}
else if (source.startsWith('/-/')) {
cacheKey = sdk.origin + source;
}
else if (source.startsWith('/pin/')) {
cacheKey = sdk.origin + source;
}
else {
return null;
}
// If the source path is a CDN path including a hash, it's assumed the
// file will never change and it is safe to pull from our local cache
// without a network request.
logger.debug(`resolve ${cacheKey}`, { name: 'install:remote' });
if (util_1.HAS_CDN_HASH_REGEX.test(cacheKey)) {
const cachedResult = await cacache_1.default.get
.info(util_1.RESOURCE_CACHE, cacheKey)
.catch(( /* ignore */) => null);
if (cachedResult) {
return CACHED_FILE_ID_PREFIX + cacheKey;
}
}
// Otherwise, make the remote request and cache the file on success.
const { statusCode } = await sdk.fetch(cacheKey);
if (statusCode === 200) {
return CACHED_FILE_ID_PREFIX + cacheKey;
}
// If lookup failed, skip this plugin and resolve the import locally instead.
// TODO: Log that this has happened (if some sort of verbose mode is enabled).
const packageName = cacheKey
.substring(sdk.origin.length)
.replace('/-/', '')
.replace('/pin/', '')
.split('@')[0];
return this.resolve(packageName, importer, { skipSelf: true }).then((resolved) => {
let finalResult = resolved;
if (!finalResult) {
finalResult = { id: packageName };
}
return finalResult;
});
},
async load(id) {
if (!id.startsWith(CACHED_FILE_ID_PREFIX)) {
return null;
}
const cacheKey = id.substring(CACHED_FILE_ID_PREFIX.length);
logger.debug(`load ${cacheKey}`, { name: 'install:remote' });
const { body } = await sdk.fetch(cacheKey);
return body.toString();
},
};
}
exports.rollupPluginSkypack = rollupPluginSkypack;
//# sourceMappingURL=rollup-plugin-remote-cdn.js.map