55 lines
1.6 KiB
JavaScript
55 lines
1.6 KiB
JavaScript
var LoaderLoadingError = require("./LoaderLoadingError");
|
|
var url;
|
|
|
|
module.exports = function loadLoader(loader, callback) {
|
|
if(loader.type === "module") {
|
|
try {
|
|
if(url === undefined) url = require("url");
|
|
var loaderUrl = url.pathToFileURL(loader.path);
|
|
var modulePromise = eval("import(" + JSON.stringify(loaderUrl.toString()) + ")");
|
|
modulePromise.then(function(module) {
|
|
handleResult(loader, module, callback);
|
|
}, callback);
|
|
return;
|
|
} catch(e) {
|
|
callback(e);
|
|
}
|
|
} else {
|
|
try {
|
|
var module = require(loader.path);
|
|
} catch(e) {
|
|
// it is possible for node to choke on a require if the FD descriptor
|
|
// limit has been reached. give it a chance to recover.
|
|
if(e instanceof Error && e.code === "EMFILE") {
|
|
var retry = loadLoader.bind(null, loader, callback);
|
|
if(typeof setImmediate === "function") {
|
|
// node >= 0.9.0
|
|
return setImmediate(retry);
|
|
} else {
|
|
// node < 0.9.0
|
|
return process.nextTick(retry);
|
|
}
|
|
}
|
|
return callback(e);
|
|
}
|
|
return handleResult(loader, module, callback);
|
|
}
|
|
};
|
|
|
|
function handleResult(loader, module, callback) {
|
|
if(typeof module !== "function" && typeof module !== "object") {
|
|
return callback(new LoaderLoadingError(
|
|
"Module '" + loader.path + "' is not a loader (export function or es6 module)"
|
|
));
|
|
}
|
|
loader.normal = typeof module === "function" ? module : module.default;
|
|
loader.pitch = module.pitch;
|
|
loader.raw = module.raw;
|
|
if(typeof loader.normal !== "function" && typeof loader.pitch !== "function") {
|
|
return callback(new LoaderLoadingError(
|
|
"Module '" + loader.path + "' is not a loader (must have normal or pitch function)"
|
|
));
|
|
}
|
|
callback();
|
|
}
|