refactor: no lodash

package.json

@@ -42,7 +42,6 @@
     "@types/cli-table": "^0.3.2",
     "@types/fs-extra": "^11.0.3",
     "@types/libnpmsearch": "^2.0.4",
-    "@types/lodash": "^4.14.199",
     "@types/mocha": "^10.0.3",
     "@types/node": "^16.18.68",
     "@types/node-fetch": "^2.6.9",
@@ -78,7 +77,6 @@
     "fs-extra": "^10.1.0",
     "is-wsl": "^2.2.0",
     "libnpmsearch": "^5.0.3",
-    "lodash": "^4.17.21",
     "mkdirp": "^3.0.1",
     "npm-registry-fetch": "^13.1.1",
     "npmlog": "^6.0.2",

src/cmd-login.ts

@@ -1,6 +1,5 @@
 import fs from "fs";
 import path from "path";
-import _ from "lodash";
 import { assertIsNpmClientError, getNpmClient } from "./registry-client";
 import log from "./logger";
 import {
@@ -106,8 +105,7 @@ const npmLogin = async function (
         email,
       },
     });
-    if (_.isString(data.ok)) log.notice("auth", data.ok);
-    else if (data.ok) {
+    if (data.ok) {
       log.notice("auth", `you are authenticated as '${username}'`);
       const token = data.token;
       return { code: 0, token };
@@ -170,7 +168,7 @@ export const generateNpmrcLines = function (
   let registryUrl = registry.slice(registry.search(/:\/\//) + 1);
   // add trailing slash
   if (!registryUrl.endsWith("/")) registryUrl = registryUrl + "/";
-  const index = _.findIndex(lines, function (element, index) {
+  const index = lines.findIndex(function (element, index) {
     if (element.indexOf(registryUrl + ":_authToken=") !== -1) {
       // If an entry for the auth token is found, replace it
       lines[index] = element.replace(

src/registry-client.ts

@@ -9,7 +9,6 @@ import RegClient, {
 import log from "./logger";
 import request from "request";
 import assert, { AssertionError } from "assert";
-import _ from "lodash";
 import { tryGetLatestVersion, UnityPackument } from "./types/packument";
 import { DomainName, isInternalPackage } from "./types/domain-name";
 import { SemanticVersion } from "./types/semantic-version";
@@ -156,7 +155,7 @@ export const fetchPackageDependencies = async function (
   // a list of pending dependency {name, version}
   const pendingList: NameVersionPair[] = [{ name, version }];
   // a list of processed dependency {name, version}
-  const processedList = [];
+  const processedList = Array.of<NameVersionPair>();
   // a list of dependency entry exists on the registry
   const depsValid = [];
   // a list of dependency entry doesn't exist on the registry
@@ -169,7 +168,10 @@ export const fetchPackageDependencies = async function (
   while (pendingList.length > 0) {
     // NOTE: Guaranteed defined because of while loop logic
     const entry = pendingList.shift() as NameVersionPair;
-    if (processedList.find((x) => _.isEqual(x, entry)) === undefined) {
+    const isProcessed = processedList.some(
+      (x) => x.name === entry.name && x.version === entry.version
+    );
+    if (!isProcessed) {
       // add entry to processed list
       processedList.push(entry);
       // create valid dependency structure
@@ -188,10 +190,10 @@ export const fetchPackageDependencies = async function (
       };
       if (!depObj.internal) {
         // try fetching package info from cache
-        const getResult = _.get(cachedPackageInfoDict, entry.name, {
+        const getResult = cachedPackageInfoDict[entry.name] ?? {
           packument: null,
           upstream: false,
-        });
+        };
         let packument = getResult.packument;
         const upstream = getResult.upstream;
         if (packument !== null) {
@@ -252,10 +254,9 @@ export const fetchPackageDependencies = async function (
         // add dependencies to pending list
         if (depObj.self || deep) {
           const deps: NameVersionPair[] = (
-            _.toPairs(packument.versions[entry.version]!["dependencies"]) as [
-              DomainName,
-              SemanticVersion
-            ][]
+            Object.entries(
+              packument.versions[entry.version]!["dependencies"] || {}
+            ) as [DomainName, SemanticVersion][]
           ).map((x): NameVersionPair => {
             return {
               name: x[0],