aurelia-webpack-plugin/dist/SubFolderPlugin.js

A plugin for webpack that enables bundling Aurelia applications.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.SubFolderPlugin = exports.resolveCache = void 0;
// This plugin tries to redirect failing request that look like `module/something`
// into `module/path-to-main/something`.
// For example, supposing `aurelia-charts` resolves to `aurelia-charts/dist/index.js`,
// Then if `aurelia-charts/pie` fails, we'll try `aurelia-charts/dist/pie`.
const path = require("path");
const subFolderTrial = Symbol();
exports.resolveCache = {};
class SubFolderPlugin {
    apply(resolver) {
        resolver.getHook("after-resolve")
            .tapAsync("Aurelia:SubFolder", (request, resolveContext, cb) => {
            // Only look for request not starting with a dot (module names)
            // and followed by a path (slash). Support @scoped/modules.
            let match = /^(?!\.)((?:@[^/]+\/)?[^/]+)(\/.*)$/i.exec(request.request);
            // Fix: it seems that under some error conditions `request.context` might end up being null.
            //      this is bad but to help users find relevant errors on the web, we don't want to crash 
            //      so instead we just skip the request.
            if (!match || !request.context || request.context[subFolderTrial]) {
                cb();
                return;
            }
            let [, module, rest] = match;
            // Try resolve just the module name to locate its actual root
            let rootRequest = Object.assign({}, request, { request: module });
            // Note: if anything doesn't work while probing or trying alternate paths, 
            //       we just ignore the error and pretend nothing happened (i.e. call cb())
            resolver.doResolve(resolver.hooks.resolve, rootRequest, "module sub-folder: identify root", {}, (err, result) => {
                if (!result ||
                    !result.relativePath ||
                    !result.relativePath.startsWith('./')) {
                    cb();
                    return;
                }
                // It worked, let's try a relative folder from there
                let root = path.posix.dirname(result.relativePath);
                let newRequest = Object.assign({}, request, { request: root.replace(/^\./, module) + rest });
                newRequest.context[subFolderTrial] = true;
                resolver.doResolve(resolver.hooks.resolve, newRequest, "try module sub-folder: " + root, {}, (err, result) => {
                    if (result)
                        cb(null, result);
                    else
                        cb();
                });
            });
        });
    }
}
exports.SubFolderPlugin = SubFolderPlugin;