Add support for modern JS

Added rollup to the project

1 files changed, 40 insertions, 0 deletions

diff --git a/commands/frontend.rb b/commands/frontend.rb
new file mode 100644
index 00000000..e3b91385
--- /dev/null
+++ b/commands/frontend.rb
@@ -0,0 +1,40 @@
+usage       'frontend [options]'
+aliases     :ds, :stuff
+summary     'uses nanoc cli to execute frontend related tasks'
+description 'This command is used by the Nanoc CLI to bundle the JavaScript.'
+
+flag   :h, :help, 'show help for this command' do |value, cmd|
+  puts cmd.help
+  exit 0
+end
+run do |opts, args, cmd|
+
+  puts '--------------------------------'
+
+  if check_requirements?
+    puts 'Compiling JavaScript...'
+
+    system('yarn install')
+
+    system('yarn bundle')
+  end
+end
+
+def check_requirements?
+  puts 'Checking requirements...'
+
+  has_requirements = command_exists?('node') && command_exists?('yarn')
+
+  unless has_requirements
+    puts 'Your system may be missing some requirements.'
+    puts 'Please refer to the installation instructions for more details:'
+    puts 'https://gitlab.com/gitlab-org/gitlab-docs/blob/master/README.md'
+  end
+  has_requirements
+end
+
+def command_exists?(command)
+  exists = system("which #{command} > /dev/null 2>&1")
+  puts "🚨 #{command} is not installed!" unless exists
+  exists
+end