Class: DiscourseTheme::Watcher

Inherits:
Object
  • Object
show all
Defined in:
lib/discourse_theme/watcher.rb

Constant Summary collapse

LISTEN_IGNORE_PATTERNS = 
[%r{migrations/.+/.+\.js}]

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(dir:, uploader:) ⇒ Watcher

Returns a new instance of Watcher.



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# File 'lib/discourse_theme/watcher.rb', line 31

def initialize(dir:, uploader:)
  @dir = dir
  @uploader = uploader
end

Class Method Details

.call_start_subscribers ⇒ Object 



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# File 'lib/discourse_theme/watcher.rb', line 23

def self.call_start_subscribers
  @subscribers&.each(&:call)
end

.reset_start_subscribers ⇒ Object 



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# File 'lib/discourse_theme/watcher.rb', line 27

def self.reset_start_subscribers
  @subscribers = []
end

.return_immediately! ⇒ Object 



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# File 'lib/discourse_theme/watcher.rb', line 6

def self.return_immediately!
  @return_immediately = true
end

.return_immediately=(val) ⇒ Object 



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# File 'lib/discourse_theme/watcher.rb', line 10

def self.return_immediately=(val)
  @return_immediately = val
end

.return_immediately? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/discourse_theme/watcher.rb', line 14

def self.return_immediately?
  !!@return_immediately
end

.subscribe_start(&block) ⇒ Object 



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# File 'lib/discourse_theme/watcher.rb', line 18

def self.subscribe_start(&block)
  @subscribers ||= []
  @subscribers << block
end

Instance Method Details

#watch ⇒ Object 



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# File 'lib/discourse_theme/watcher.rb', line 36

def watch
  listener =
    Listen.to(@dir, ignore: LISTEN_IGNORE_PATTERNS) do |modified, added, removed|
      yield(modified, added, removed) if block_given?

      begin
        if modified.length == 1 && added.length == 0 && removed.length == 0 &&
             (resolved = resolve_file(modified[0]))
          target, name, type_id = resolved
          UI.progress "Fast updating #{target}.scss"

          @uploader.upload_theme_field(
            target: target,
            name: name,
            value: File.read(modified[0]),
            type_id: type_id,
          )
        else
          count = modified.length + added.length + removed.length

          if count > 1
            UI.progress "Detected changes in #{count} files, uploading theme"
          else
            filename = modified[0] || added[0] || removed[0]
            UI.progress "Detected changes in #{filename.gsub(@dir, "")}, uploading theme"
          end

          @uploader.upload_full_theme
        end
        UI.success "Done! Watching for changes..."
      rescue DiscourseTheme::ThemeError => e
        UI.error "#{e.message}"
        UI.progress "Watching for changes..."
      end
    end

  listener.start
  self.class.call_start_subscribers
  sleep 1 while !self.class.return_immediately?
end