Module: CloudflareWorkers::BuildSupport

Defined in:
lib/cloudflare_workers/build_support.rb

Constant Summary collapse

RUNTIME_GEM_NAME = 
'homura-runtime'
SINATRA_GEM_NAME = 
'sinatra-homura'
SEQUEL_D1_GEM_NAME = 
'sequel-d1'
EXCLUDED_GROUPS =

Returns absolute Pathnames for every ‘path:`-declared gem in the project’s Gemfile that should ship in the Workers bundle.

Excludes:

  • gems we already wire in explicitly (homura-runtime / sinatra-homura / sequel-d1)

  • ‘require: false` gems (dev tooling like `gem ’rspec’, path: …, require: false`)

  • gems declared inside ‘group :development do … end` / `group :test do … end` blocks (they don’t ship to production)

%i[development test dev_test development_test ci tools].freeze

Class Method Summary collapse

Class Method Details

.ensure_standalone_runtime(project_root, current_file: __FILE__, loaded_specs: Gem.loaded_specs) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 46

def ensure_standalone_runtime(project_root, current_file: __FILE__, loaded_specs: Gem.loaded_specs)
  # The homura runtime needs two .mjs glue files alongside the
  # generated `worker.entrypoint.mjs`. Until 0.2.22 we wrote them
  # to `cf-runtime/` at the project root, which made every Ruby
  # repo carry two opaque JS files in source control. Hide them
  # under `build/cf-runtime/` so the build artifact tree owns
  # them — `build/` is already in the example .gitignore template.
  target_dir = Pathname(project_root).join('build', 'cf-runtime')
  FileUtils.mkdir_p(target_dir)

  %w[setup-node-crypto.mjs worker_module.mjs].each do |name|
    FileUtils.cp(runtime_file(name, current_file: current_file, loaded_specs: loaded_specs), target_dir.join(name))
  end

  target_dir
end

.gem_lib(name, loaded_specs: Gem.loaded_specs) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 31

def gem_lib(name, loaded_specs: Gem.loaded_specs)
  File.join(gem_root(name, loaded_specs: loaded_specs), 'lib')
end

.gem_root(name, loaded_specs: Gem.loaded_specs) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 17

def gem_root(name, loaded_specs: Gem.loaded_specs)
  spec = loaded_spec(name, loaded_specs: loaded_specs)
  return spec.full_gem_path if spec

  raise("homura build: gem #{name} not loaded; use bundle exec from app root")
end

.gem_vendor(name, loaded_specs: Gem.loaded_specs) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 35

def gem_vendor(name, loaded_specs: Gem.loaded_specs)
  vendor = File.join(gem_root(name, loaded_specs: loaded_specs), 'vendor')
  return vendor if Dir.exist?(vendor)

  nil
end

.loaded_spec(name, loaded_specs: Gem.loaded_specs) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 13

def loaded_spec(name, loaded_specs: Gem.loaded_specs)
  loaded_specs[name]
end

.path_gemfile_entries(project_root) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 147

def path_gemfile_entries(project_root)
  gf = Pathname(project_root).join('Gemfile')
  return [] unless gf.file?

  wired = [RUNTIME_GEM_NAME, SINATRA_GEM_NAME, SEQUEL_D1_GEM_NAME]
  out = []
  group_stack = []

  gf.read.each_line do |line|
    stripped = line.strip
    next if stripped.empty? || stripped.start_with?('#')

    if (m = stripped.match(/\Agroup\s+(.+?)\s+do\b/))
      groups = m[1].scan(/[:'"]([A-Za-z0-9_]+)['"]?/).flatten.map(&:to_sym)
      group_stack.push(groups)
      next
    end
    if stripped == 'end'
      group_stack.pop unless group_stack.empty?
      next
    end

    next if group_stack.flatten.any? { |g| EXCLUDED_GROUPS.include?(g) }

    m = line.match(/gem\s+['"]([^'"]+)['"][^#]*?path:\s*['"]([^'"]+)['"]/)
    next unless m
    name, rel = m[1], m[2]
    next if wired.include?(name)
    next if line.match?(/require:\s*false/)

    gem_path = Pathname.new(rel).expand_path(project_root)
    out << gem_path if gem_path.directory?
  end
  out.uniq
end

.runtime_file(*names, current_file: __FILE__, loaded_specs: Gem.loaded_specs) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 42

def runtime_file(*names, current_file: __FILE__, loaded_specs: Gem.loaded_specs)
  runtime_root(current_file: current_file, loaded_specs: loaded_specs).join('runtime', *names)
end

.runtime_root(current_file:, loaded_specs: Gem.loaded_specs) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 24

def runtime_root(current_file:, loaded_specs: Gem.loaded_specs)
  spec = loaded_spec(RUNTIME_GEM_NAME, loaded_specs: loaded_specs)
  return Pathname(spec.full_gem_path) if spec

  Pathname(current_file).expand_path.join('../..')
end

.standalone_load_paths(project_root, with_db:, loaded_specs: Gem.loaded_specs) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 63

def standalone_load_paths(project_root, with_db:, loaded_specs: Gem.loaded_specs)
  root = Pathname(project_root)
  load_paths = []

  hv = vendor_from_gemfile(root)
  load_paths << hv.to_s if hv

  load_paths += ['.', 'build/auto_await', 'build/auto_await/app', 'app']
  [
    gem_lib(RUNTIME_GEM_NAME, loaded_specs: loaded_specs),
    gem_vendor(RUNTIME_GEM_NAME, loaded_specs: loaded_specs),
    gem_lib(SINATRA_GEM_NAME, loaded_specs: loaded_specs),
    gem_vendor(SINATRA_GEM_NAME, loaded_specs: loaded_specs)
  ].compact.each do |path|
    load_paths << path
  end

  if with_db
    [
      gem_vendor(SEQUEL_D1_GEM_NAME, loaded_specs: loaded_specs),
      gem_lib(SEQUEL_D1_GEM_NAME, loaded_specs: loaded_specs)
    ].compact.each do |path|
      load_paths << path
    end
  end

  # Pick up any other `path:`-resolved gems declared in the consumer's
  # Gemfile (e.g. `sinatra-inertia`). This keeps the build pipeline
  # extensible: users can drop a pure-Ruby gem under `gems/foo`, list
  # it as `gem 'foo', path: '../../gems/foo'`, and Opal will find its
  # `lib/` automatically — no homura-runtime change required.
  #
  # We prefer the auto-await-transformed copy under
  # `build/auto_await/gem_<basename>/lib` if present (homura-build
  # writes one for every path: gem before invoking Opal), so that
  # async chains inside the gem get `__await__` inserted just like
  # consumer app code.
  path_gemfile_entries(root).each do |gem_path|
    basename = gem_path.basename.to_s
    rewritten_lib = root.join('build', 'auto_await', "gem_#{basename}", 'lib')
    load_paths << rewritten_lib.to_s if rewritten_lib.directory?
    %w[lib vendor].each do |sub|
      dir = gem_path.join(sub)
      load_paths << dir.to_s if dir.directory?
    end
  end

  load_paths << 'vendor' if root.join('vendor').directory?
  load_paths << 'build'
  load_paths.uniq
end

.standalone_namespace(project_root, suffix) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 115

def standalone_namespace(project_root, suffix)
  base = Pathname(project_root).basename.to_s
  parts = base.split(/[^A-Za-z0-9]+/).reject(&:empty?)
  module_name = parts.map { |part| part[0].upcase + part[1..].to_s }.join
  module_name = 'App' if module_name.empty?
  module_name = "App#{module_name}" if module_name.match?(/\A\d/)
  "#{module_name}#{suffix}"
end

.vendor_from_gemfile(project_root) ⇒ Object 



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# File 'lib/cloudflare_workers/build_support.rb', line 124

def vendor_from_gemfile(project_root)
  gf = Pathname(project_root).join('Gemfile')
  return unless gf.file?

  txt = gf.read
  return unless (m = txt.match(/#{Regexp.escape(RUNTIME_GEM_NAME)}['"]\s*,\s*path:\s*['"]([^'"]+)['"]/))

  runtime_path = Pathname.new(m[1]).expand_path(project_root)
  vend = runtime_path.join('..', '..', 'vendor').expand_path
  vend if vend.directory?
end