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class Thor
module Actions
# Creates an empty directory.
#
# ==== Parameters
# destination<String>:: the relative path to the destination root.
# config<Hash>:: give :verbose => false to not log the status.
#
# ==== Examples
#
# empty_directory "doc"
#
def empty_directory(destination, config={})
action EmptyDirectory.new(self, destination, config)
end
# Class which holds create directory logic. This is the base class for
# other actions like create_file and directory.
#
# This implementation is based in Templater actions, created by Jonas Nicklas
# and Michael S. Klishin under MIT LICENSE.
#
class EmptyDirectory #:nodoc:
attr_reader :base, :destination, :given_destination, :relative_destination, :config
# Initializes given the source and destination.
#
# ==== Parameters
# base<Thor::Base>:: A Thor::Base instance
# source<String>:: Relative path to the source of this file
# destination<String>:: Relative path to the destination of this file
# config<Hash>:: give :verbose => false to not log the status.
#
def initialize(base, destination, config={})
@base, @config = base, { :verbose => true }.merge(config)
self.destination = destination
end
# Checks if the destination file already exists.
#
# ==== Returns
# Boolean:: true if the file exists, false otherwise.
#
def exists?
::File.exists?(destination)
end
def invoke!
invoke_with_conflict_check do
::FileUtils.mkdir_p(destination)
end
end
def revoke!
say_status :remove, :red
::FileUtils.rm_rf(destination) if !pretend? && exists?
given_destination
end
protected
# Shortcut for pretend.
#
def pretend?
base.options[:pretend]
end
# Sets the absolute destination value from a relative destination value.
# It also stores the given and relative destination. Let's suppose our
# script is being executed on "dest", it sets the destination root to
# "dest". The destination, given_destination and relative_destination
# are related in the following way:
#
# inside "bar" do
# empty_directory "baz"
# end
#
# destination #=> dest/bar/baz
# relative_destination #=> bar/baz
# given_destination #=> baz
#
def destination=(destination)
if destination
@given_destination = convert_encoded_instructions(destination.to_s)
@destination = ::File.expand_path(@given_destination, base.destination_root)
@relative_destination = base.relative_to_original_destination_root(@destination)
end
end
# Filenames in the encoded form are converted. If you have a file:
#
# %class_name%.rb
#
# It gets the class name from the base and replace it:
#
# user.rb
#
def convert_encoded_instructions(filename)
filename.gsub(/%(.*?)%/) do |string|
instruction = $1.strip
base.respond_to?(instruction) ? base.send(instruction) : string
end
end
# Receives a hash of options and just execute the block if some
# conditions are met.
#
def invoke_with_conflict_check(&block)
if exists?
on_conflict_behavior(&block)
else
say_status :create, :green
block.call unless pretend?
end
destination
end
# What to do when the destination file already exists.
#
def on_conflict_behavior(&block)
say_status :exist, :blue
end
# Shortcut to say_status shell method.
#
def say_status(status, color)
base.shell.say_status status, relative_destination, color if config[:verbose]
end
end
end
end
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