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Contents
module Templater
module Actions
class Template < Action
# Builds a new template.
#
# === Parameters
# generator<Object>:: Context for rendering
# name<Symbol>:: The name of this template
# source<String>:: Full path to the source of this template
# destination<String>:: Full path to the destination of this template
# options<Hash{Symbol=>Symbol}:: Options, including callbacks.
def initialize(generator, name, source, destination, options={})
self.generator = generator
self.name = name
self.source = source
self.destination = destination
self.options = options
end
# Renders the template using ERB and returns the result as a String.
#
# === Returns
# String:: The rendered template.
def render
context = generator.instance_eval 'binding'
ERB.new(::File.read(source), nil, '-').result(context)
end
# Checks if the destination file already exists.
#
# === Returns
# Boolean:: true if the file exists, false otherwise.
def exists?
::File.exists?(destination)
end
# Checks if the content of the file at the destination is identical to the rendered result.
#
# === Returns
# Boolean:: true if it is identical, false otherwise.
def identical?
::File.read(destination) == render if ::File.exists?(destination)
end
# Renders the template and copies it to the destination.
def invoke!
callback(:before)
::FileUtils.mkdir_p(::File.dirname(destination))
::File.open(destination, 'w') {|f| f.write render }
callback(:after)
end
# removes the destination file
def revoke!
::FileUtils.rm(destination, :force => true)
end
end
end
end
Version data entries
24 entries across 23 versions & 3 rubygems