Implement brew bundle add

Part of #818

Author: carlocab

cmd/bundle.rb

@@ -136,7 +136,7 @@ def run
         require_relative "../lib/bundle"
 
         subcommand = args.named.first.presence
-        if subcommand != "exec" && args.named.size > 1
+        if ["exec", "add"].exclude?(subcommand) && args.named.size > 1
           raise UsageError, "This command does not take more than 1 subcommand argument."
         end
 
@@ -240,6 +240,19 @@ def run
             whalebrew: args.whalebrew? || args.all?,
             vscode:    args.vscode? || args.all?,
           )
+        when "add"
+          _subcommand, *named_args = args.named
+          Bundle::Commands::Add.run(
+            *named_args,
+            global:,
+            file:,
+            brews:     args.brews? || args.all? || no_type_args,
+            casks:     args.casks? || args.all?,
+            taps:      args.taps? || args.all?,
+            mas:       args.mas? || args.all?,
+            whalebrew: args.whalebrew? || args.all?,
+            vscode:    args.vscode? || args.all?,
+          )
         else
           raise UsageError, "unknown subcommand: #{subcommand}"
         end

lib/bundle.rb

@@ -6,6 +6,7 @@
 require "bundle/brewfile"
 require "bundle/bundle"
 require "bundle/dsl"
+require "bundle/adder"
 require "bundle/checker"
 require "bundle/skipper"
 require "bundle/brew_services"
@@ -31,6 +32,7 @@
 require "bundle/commands/check"
 require "bundle/commands/exec"
 require "bundle/commands/list"
+require "bundle/commands/add"
 require "bundle/whalebrew_installer"
 require "bundle/whalebrew_dumper"
 require "bundle/vscode_extension_checker"

lib/bundle/adder.rb

@@ -0,0 +1,12 @@
+# typed: true
+# frozen_string_literal: true
+
+module Bundle
+  module Adder
+    module_function
+
+    def add(*args, entries:, brews:, casks:, taps:, mas:, whalebrew:, vscode:)
+      raise "Implement me!"
+    end
+  end
+end

lib/bundle/commands/add.rb

@@ -0,0 +1,24 @@
+# typed: true
+# frozen_string_literal: true
+
+module Bundle
+  module Commands
+    module Add
+      module_function
+
+      def run(*args, global:, file:, brews:, casks:, taps:, mas:, whalebrew:, vscode:)
+        entries = Brewfile.read(global:, file:).entries
+        Bundle::Adder.add(
+          *args,
+          entries:,
+          brews:,
+          casks:,
+          taps:,
+          mas:,
+          whalebrew:,
+          vscode:,
+        )
+      end
+    end
+  end
+end