Class: CssSpriter::MtimeTracker

Inherits:
Object
  • Object
show all
Defined in:
lib/css-spriter/mtime_tracker.rb

Instance Method Summary collapse

Constructor Details

#initialize(dir, options = {}) ⇒ MtimeTracker

Returns a new instance of MtimeTracker.



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# File 'lib/css-spriter/mtime_tracker.rb', line 3

def initialize(dir, options = {})
  @dir = dir
  @options = options
end

Instance Method Details

#changeset ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 53

def changeset
  changed = files.select{|f| file_changed?(f)}
  deleted = without_exclusions(mtimes.keys) - current_mtimes.keys
  changed + deleted
end

#cleanup ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 8

def cleanup
  File.delete(mtime_file) rescue nil
end

#current_mtimes ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 26

def current_mtimes
  @current ||= files.inject({}) do |map, f|
    map[f] = File.mtime(f).to_i; map
  end
end

#file_changed?(file) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/css-spriter/mtime_tracker.rb', line 32

def file_changed?(file)
  mtimes[file] != current_mtimes[file]
end

#files ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 16

def files
  @files = without_exclusions(Dir.glob(@dir + "/**/*"))
end

#fresh? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/css-spriter/mtime_tracker.rb', line 12

def fresh?
  not File.exists?(mtime_file)
end

#has_changes? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/css-spriter/mtime_tracker.rb', line 59

def has_changes?
  not changeset.empty?
end

#mtime_file ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 63

def mtime_file
  @dir + "/.mtimes"
end

#mtimes ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 36

def mtimes
  return @mtimes if @mtimes
  return {} unless File.exists?(mtime_file)
  @mtimes = read_mtimes
end

#read_mtimes ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 42

def read_mtimes
  mtimes = {}
  File.open(mtime_file) do |f|
    f.each do |line|
      name, time = line.split("\t")
      mtimes[name] = time.to_i
    end
  end
  mtimes
end

#reset ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 76

def reset
  @mtimes = nil
  @current = nil
  @files = nil
end

#update ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 67

def update
  File.open(mtime_file, 'w') do |f|
    current = current_mtimes
    flat = current.map{|k, v| "#{k}\t#{v}\n"}.join
    f.write flat
  end
  reset
end

#without_exclusions(files) ⇒ Object 



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# File 'lib/css-spriter/mtime_tracker.rb', line 20

def without_exclusions(files)
  return files unless @options[:exclude]
  exclusions = [@options[:exclude]].flatten
  files.select{|f| not exclusions.any?{|e| f.match e}}
end