Class: Nanoc::Graphviz::Filter

Inherits:

Filter

• Object
• Filter
• Nanoc::Graphviz::Filter

Defined in:

lib/nanoc/graphviz/filter.rb

Overview

Graphviz Filter class

Instance Method Summary

• #ready? ⇒ Boolean

  check runtime envs.

• #run(content, _ = {}) ⇒ Integer

  convert Graphviz code to image.

Instance Method Details

#ready? ⇒ Boolean

check runtime envs

Returns:

• (Boolean)

# File 'lib/nanoc/graphviz/filter.rb', line 28

def ready?
  graphviz_ready?
end

#run(content, _ = {}) ⇒ Integer

convert Graphviz code to image

Parameters:

• content (String) —

  Graphviz code

Returns:

• (Integer) —

  command process status

Raises:

• (RuntimeError)

# File 'lib/nanoc/graphviz/filter.rb', line 18

def run(content, _ = {})
  fail 'Runtime environments is not ready' unless ready?
  command = "dot -Tpng -o #{output_filename} < #{content}"
  system(command)
  $?
end