chore: add flags for commands

Author: rishabh3112

lib/groups/help.js

@@ -1,4 +1,5 @@
 const chalk = require('chalk');
+const commandLineUsage = require('command-line-usage');
 
 class HelpGroup {
     b() {
@@ -11,11 +12,21 @@ class HelpGroup {
     outputHelp(command=null) {
         if (command !== null) {
             const commands = require('../utils/commands').info;
+            const { bold, underline } = chalk.white;
+            const header = (head) => bold(underline(head));
+
             const options = commands.find(cmd => (cmd.name === command || cmd.alias === command));
-            const { bold } = chalk.white;
             const usage = chalk.keyword('orange')('webpack ' + options.usage);
             const description = options.description;
-            process.stdout.write(`${bold('Usage')}: ${usage}\n${bold('Description')}: ${description}\n`);
+
+            process.stdout.write(`${header('Usage')}: ${usage}\n${header('Description')}: ${description}\n`);
+            if (options.flags) {
+                const flags = commandLineUsage({
+                    header: "Flags",
+                    optionList: options.flags
+                });
+                process.stdout.write(flags);
+            }
         } else {
             process.stdout.write(this.run().outputOptions.help);
         }
@@ -32,7 +43,6 @@ class HelpGroup {
     run() {
         const { underline, bold } = chalk.white
         const o = s => chalk.keyword('orange')(s);
-        const commandLineUsage = require('command-line-usage');
         const options = require('../utils/cli-flags');
         const title = bold('⬡                     ') + underline('webpack') + bold('                     ⬡');
         const desc = 'The build tool for modern web applications';

lib/utils/cli-flags.js

@@ -43,6 +43,64 @@ module.exports = {
             type: String,
             usage: 'info [options] [output-format]',
             description: 'Outputs information about your system and dependencies',
+            flags: [
+                {
+                    name: 'output-json',
+                    type: Boolean,
+                    group: OUTPUT_GROUP,
+                    description: 'To get the output as JSON',
+                },
+                {
+                    name: 'output-markdown',
+                    type: Boolean,
+                    group: OUTPUT_GROUP,
+                    description: 'To get the output as markdown',
+                },
+                {
+                    name: 'help',
+                    type: Boolean,
+                    group: BASIC_GROUP,
+                    description: 'Shows help',
+                },
+                {
+                    name: 'version',
+                    type: Boolean,
+                    group: BASIC_GROUP,
+                    description: 'Show version number of webpack-cli',
+                },
+                {
+                    name: 'system',
+                    alias: 's',
+                    type: Boolean,
+                    group: BASIC_GROUP,
+                    description: 'System information ( OS, CPU )',
+                },
+                {
+                    name: 'binaries',
+                    alias: 'b',
+                    type: Boolean,
+                    group: BASIC_GROUP,
+                    description: 'Installed binaries (Node, yarn, npm)',
+                },
+                {
+                    name: 'browsers',
+                    type: Boolean,
+                    group: BASIC_GROUP,
+                    description: 'Installed web browsers',
+                },
+                {
+                    name: 'npmg',
+                    type: Boolean,
+                    group: BASIC_GROUP,
+                    description: 'Globally installed NPM packages ( webpack & webpack-cli only )',
+                },
+                {
+                    name: 'npmPackages',
+                    type: Boolean,
+                    group: BASIC_GROUP,
+                    description: 'Info about packages related to webpack installed in the project',
+                },
+            ]
         },
         {
             name: 'serve',