Module: PhotoCook::Utils

Defined in:
lib/photo-cook/utils.rb

Class Method Summary collapse

Class Method Details

.call_block_with_floating_arguments(callable, args) ⇒ Object 



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# File 'lib/photo-cook/utils.rb', line 19

def call_block_with_floating_arguments(callable, args)
  arity         = callable.arity
  resized_args  = arity < 0 ? args : args[0...arity]
  callable.call(*resized_args)
end

.format_size(bytes, precision = 2) ⇒ Object 



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# File 'lib/photo-cook/utils.rb', line 7

def format_size(bytes, precision = 2)
  if bytes >= 1_000_000_000.0
    "#{(bytes / 1_000_000_000.0).round(precision)} GB"

  elsif bytes >= 1_000_000.0
    "#{(bytes / 1_000_000.0).round(precision)} MB"

  else
    "#{(bytes / 1_000.0).round(precision)} KB"
  end
end

.make_relative_symlink(source, destination) ⇒ Object 



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# File 'lib/photo-cook/utils.rb', line 25

def make_relative_symlink(source, destination)
  unless File.readable?(destination)
    # /application/public/resize-cache/uploads/photos/1
    p1 = source.kind_of?(String)      ? Pathname.new(source) : source

    # /application/public/uploads/photos/1/resize-cache
    p2 = destination.kind_of?(String) ? Pathname.new(destination) : destination

    # ../../../resize-cache/uploads/photos/1
    relative = p1.relative_path_from(p2.dirname).to_s

    # resize-cache
    basename = p2.basename.to_s

    flags    = symlink_utility_needs_relative_flag? ? '-rs' : '-s'
    cmd      = "cd #{p2.dirname.to_s} && rm -f #{basename} && ln #{flags} #{relative} #{basename}"

    %x{ #{cmd} }

    PhotoCook.log do
      log "Symlink"
      log "Source:      #{p1.to_s}"
      log "Destination: #{p2.to_s}"
      log "Command:     #{cmd}"
      log "Status:      #{$?.success? ? 'OK' : 'FAIL'}"
    end

    return $?.success?
  end
  true
end

.measure ⇒ Object 



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# File 'lib/photo-cook/utils.rb', line 65

def measure
  started  = Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond)
  returned = yield
  finished = Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond)
  [returned, finished - started]
end

.symlink_utility_needs_relative_flag? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/photo-cook/utils.rb', line 57

def symlink_utility_needs_relative_flag?
  if @relative_flag_illegal.nil?
    out = Open3.capture2e('ln', '-rs')[0]
    @relative_flag_illegal = !!(out =~ /\billegal\b/)
  end
  @relative_flag_illegal == false
end