Add torbrowser package (#5284)

packages/torbrowser.rb

+require 'package'
+
+class Torbrowser < Package
+  description "'The Onion Router' browser"
+  homepage 'https://www.torproject.org/'
+  compatibility 'x86_64'
+  @_ver = '10.0.12'
+  version @_ver
+
+  case ARCH
+  when 'x86_64'
+    source_url "https://www.torproject.org/dist/torbrowser/#{@_ver}/tor-browser-linux64-#{@_ver}_en-US.tar.xz"
+    source_sha256 `curl -Ls #{@source_url} | sha256sum | cut -d ' ' -f1`.chomp
+    depends_on 'gtk3'
+    depends_on 'sommelier'
+  end
+
+  def self.build
+    system "cat <<'EOF'> tor
+#!/bin/bash
+cd #{CREW_PREFIX}/share
+./start-tor-browser.desktop \"\$@\"
+EOF"
+  end
+
+  def self.install
+    FileUtils.mkdir_p "#{CREW_DEST_PREFIX}/bin"
+    FileUtils.mkdir_p "#{CREW_DEST_PREFIX}/share"
+    FileUtils.mv 'Browser/', "#{CREW_DEST_PREFIX}/share"
+    FileUtils.mv 'start-tor-browser.desktop', "#{CREW_DEST_PREFIX}/share"
+    FileUtils.install 'tor', "#{CREW_DEST_PREFIX}/bin/tor", mode: 0755
+  end
+
+  def self.postinstall
+    puts
+    puts "Type 'tor' to get started.".lightblue
+    puts
+  end
+end