class Guard::Watcher


enable processing the file system change result.
When a watcher matches a change, an optional action block is executed to
modifications.
The watcher defines a RegExp that will be matched against file system

def self.match_files(guard, files)

Returns:
  • (Array) - the matched watcher response
    Parameters:
    • files (Array) -- the changed files
    • guard (Guard::Plugin) -- the Guard plugin which watchers are used 
    def self.match_files(guard, files)
  return [] if files.empty?
  files.inject([]) do |paths, file|
    guard.watchers.each do |watcher|
      matches = watcher.match(file)
      next(paths) unless matches
      if watcher.action
        result = watcher.call_action(matches)
        if guard.options[:any_return]
          paths << result
        elsif result.respond_to?(:empty?) && !result.empty?
          paths << Array(result)
        else
          next(paths)
        end
      else
        paths << matches[0]
      end
      break if guard.options[:first_match]
    end
    guard.options[:any_return] ? paths : paths.flatten.map(&:to_s)
  end
end

    def ==(other)

    Returns:
    • (true, false) - equal or not

    Parameters:
    • other (Guard::Watcher) -- other watcher for comparing 
    def ==(other)
  action == other.action && pattern == other.pattern
end

    def call_action(matches)

    Returns:
    • (String) - the final paths

    Parameters:
    • matches (String, MatchData) -- the matched path or the match from the 
    def call_action(matches)
  @action.arity > 0 ? @action.call(matches) : @action.call
rescue => ex
  UI.error "Problem with watch action!\n#{ex.message}"
  UI.error ex.backtrace.join("\n")
end

    def initialize(pattern, action = nil)

    Parameters:
    • action (Block) -- the action to execute before passing the result to
    • pattern (String, Regexp) -- the pattern to be watched by the Guard 
    def initialize(pattern, action = nil)
  @action = action
  @pattern = Pattern.create(pattern)
end

    def match(string_or_pathname) 

    def match(string_or_pathname)
  m = pattern.match(string_or_pathname)
  m.nil? ? nil : Pattern::MatchResult.new(m, string_or_pathname)
end