Sage + Capistrano

Capfile

# Load DSL and Setup Up Stages
require 'capistrano/setup'

# Includes default deployment tasks
require 'capistrano/deploy'

# Load tasks from gems
require 'capistrano/bower'
require 'capistrano/gulp'
require 'capistrano/npm'

# Loads custom tasks from `lib/capistrano/tasks' if you have any defined.
# Customize this path to change the location of your custom tasks.
Dir.glob('lib/capistrano/tasks/*.cap').each { |r| import r }

deploy.rb

set :application, 'my_app_name'
set :repo_url, 'git@example.com:me/my_repo.git'
set :branch, :master
set :deploy_to, -> { "/srv/www/#{fetch(:application)}" }
set :log_level, :info

# rest of the usual config

set :npm_flags, %w(--silent --no-progress)

set :gulp_tasks, '--production'
set :gulp_file, -> { release_path.join('path/to/sage/Gulpfile.js') }
set :gulp_target_path, -> { release_path.join('path/to/sage') }

namespace :deploy do
  before :updated, 'gulp'
end

Gemfile

gem 'capistrano'
gem 'capistrano-bower'
gem 'capistrano-gulp'
gem 'capistrano-npm'

Also read elsewhere that set :gulp_tasks, '--production' is not appropriate for staging because it means that the devDependencies in package.json are skipped? So I have removed that, assuming that's true(?).

Try adding set :npm_flags, %w(--silent --no-progress). You are right about devDependencies but had the wrong place. That's to do with npm and not gulp.

Excellent. Last one, I hope!

The dependency "tree" on my local/dev machine ends up creating tons of node_modules directories. But in staging, there are many fewer. And then I get dependency errors when the gulp task runs, saying dependent modules weren't found.

Should the staging/prod server configs mean that a different number of node_modules be loaded?? Seems strange.

No wait. It worked later. Possible an i/o error on the machine?! Scratch that either way!

Is this still relevant since it seems 9.0.0-beta.2 uses yarn instead?