Class: XRT::Command::Extract

Inherits:
Object
  • Object
show all
Defined in:
lib/xrt/commands.rb

Instance Method Summary collapse

Instance Method Details

#execute(from_file, target_block, templates_directory, to_file_name) ⇒ Object

xrt extract templates/blogs/index.html ‘[% IF pager’ ‘templates/’ ‘blogs/_pager.tt’



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# File 'lib/xrt/commands.rb', line 26

def execute(from_file, target_block, templates_directory, to_file_name)
  from_source = open(from_file).read
  parser = XRT::Parser.new(from_source)
  from_doc = parser.document

  found_blocks = from_doc.find_blocks.select{|block|
    block.content.index(target_block) == 0
  }

  if found_blocks.length == 0
    raise "target_block not found"
  end

  if found_blocks.length > 1
    raise "ambiguous target_block"
  end

  found_block = found_blocks.first

  replace_to_node = XRT::Parser.new(%Q{[% INCLUDE "#{to_file_name}" %]}).document

  from_doc.replace_child(replace_to_node, found_block)

  content_to_overwrite = from_doc.content
  content_for_new_file = found_block.auto_indent

  open(from_file, 'w'){|f|
    f.write content_to_overwrite
  }

  new_file = Pathname(templates_directory).join(to_file_name)

  if new_file.exist?
    raise 'TO_FILE_NAME exists.'
  end

  open(new_file, 'w'){|f|
    f.puts content_for_new_file
  }

  true
end