add hw2

node_modules/yargs/build/lib/middleware.js

@@ -0,0 +1,88 @@
+import { argsert } from './argsert.js';
+import { isPromise } from './utils/is-promise.js';
+export class GlobalMiddleware {
+    constructor(yargs) {
+        this.globalMiddleware = [];
+        this.frozens = [];
+        this.yargs = yargs;
+    }
+    addMiddleware(callback, applyBeforeValidation, global = true, mutates = false) {
+        argsert('<array|function> [boolean] [boolean] [boolean]', [callback, applyBeforeValidation, global], arguments.length);
+        if (Array.isArray(callback)) {
+            for (let i = 0; i < callback.length; i++) {
+                if (typeof callback[i] !== 'function') {
+                    throw Error('middleware must be a function');
+                }
+                const m = callback[i];
+                m.applyBeforeValidation = applyBeforeValidation;
+                m.global = global;
+            }
+            Array.prototype.push.apply(this.globalMiddleware, callback);
+        }
+        else if (typeof callback === 'function') {
+            const m = callback;
+            m.applyBeforeValidation = applyBeforeValidation;
+            m.global = global;
+            m.mutates = mutates;
+            this.globalMiddleware.push(callback);
+        }
+        return this.yargs;
+    }
+    addCoerceMiddleware(callback, option) {
+        const aliases = this.yargs.getAliases();
+        this.globalMiddleware = this.globalMiddleware.filter(m => {
+            const toCheck = [...(aliases[option] || []), option];
+            if (!m.option)
+                return true;
+            else
+                return !toCheck.includes(m.option);
+        });
+        callback.option = option;
+        return this.addMiddleware(callback, true, true, true);
+    }
+    getMiddleware() {
+        return this.globalMiddleware;
+    }
+    freeze() {
+        this.frozens.push([...this.globalMiddleware]);
+    }
+    unfreeze() {
+        const frozen = this.frozens.pop();
+        if (frozen !== undefined)
+            this.globalMiddleware = frozen;
+    }
+    reset() {
+        this.globalMiddleware = this.globalMiddleware.filter(m => m.global);
+    }
+}
+export function commandMiddlewareFactory(commandMiddleware) {
+    if (!commandMiddleware)
+        return [];
+    return commandMiddleware.map(middleware => {
+        middleware.applyBeforeValidation = false;
+        return middleware;
+    });
+}
+export function applyMiddleware(argv, yargs, middlewares, beforeValidation) {
+    return middlewares.reduce((acc, middleware) => {
+        if (middleware.applyBeforeValidation !== beforeValidation) {
+            return acc;
+        }
+        if (middleware.mutates) {
+            if (middleware.applied)
+                return acc;
+            middleware.applied = true;
+        }
+        if (isPromise(acc)) {
+            return acc
+                .then(initialObj => Promise.all([initialObj, middleware(initialObj, yargs)]))
+                .then(([initialObj, middlewareObj]) => Object.assign(initialObj, middlewareObj));
+        }
+        else {
+            const result = middleware(acc, yargs);
+            return isPromise(result)
+                ? result.then(middlewareObj => Object.assign(acc, middlewareObj))
+                : Object.assign(acc, result);
+        }
+    }, argv);
+}