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|
require_relative "empty_directory"
class Bundler::Thor
module Actions
# Injects the given content into a file. Different from gsub_file, this
# method is reversible.
#
# ==== Parameters
# destination<String>:: Relative path to the destination root
# data<String>:: Data to add to the file. Can be given as a block.
# config<Hash>:: give :verbose => false to not log the status and the flag
# for injection (:after or :before) or :force => true for
# insert two or more times the same content.
#
# ==== Examples
#
# insert_into_file "config/environment.rb", "config.gem :thor", :after => "Rails::Initializer.run do |config|\n"
#
# insert_into_file "config/environment.rb", :after => "Rails::Initializer.run do |config|\n" do
# gems = ask "Which gems would you like to add?"
# gems.split(" ").map{ |gem| " config.gem :#{gem}" }.join("\n")
# end
#
WARNINGS = {unchanged_no_flag: "File unchanged! Either the supplied flag value not found or the content has already been inserted!"}
def insert_into_file(destination, *args, &block)
data = block_given? ? block : args.shift
config = args.shift || {}
config[:after] = /\z/ unless config.key?(:before) || config.key?(:after)
action InjectIntoFile.new(self, destination, data, config)
end
alias_method :inject_into_file, :insert_into_file
class InjectIntoFile < EmptyDirectory #:nodoc:
attr_reader :replacement, :flag, :behavior
def initialize(base, destination, data, config)
super(base, destination, {verbose: true}.merge(config))
@behavior, @flag = if @config.key?(:after)
[:after, @config.delete(:after)]
else
[:before, @config.delete(:before)]
end
@replacement = data.is_a?(Proc) ? data.call : data
@flag = Regexp.escape(@flag) unless @flag.is_a?(Regexp)
end
def invoke!
content = if @behavior == :after
'\0' + replacement
else
replacement + '\0'
end
if exists?
if replace!(/#{flag}/, content, config[:force])
say_status(:invoke)
elsif replacement_present?
say_status(:unchanged, color: :blue)
else
say_status(:unchanged, warning: WARNINGS[:unchanged_no_flag], color: :red)
end
else
unless pretend?
raise Bundler::Thor::Error, "The file #{ destination } does not appear to exist"
end
end
end
def revoke!
say_status :revoke
regexp = if @behavior == :after
content = '\1\2'
/(#{flag})(.*)(#{Regexp.escape(replacement)})/m
else
content = '\2\3'
/(#{Regexp.escape(replacement)})(.*)(#{flag})/m
end
replace!(regexp, content, true)
end
protected
def say_status(behavior, warning: nil, color: nil)
status = if behavior == :invoke
if flag == /\A/
:prepend
elsif flag == /\z/
:append
else
:insert
end
elsif warning
warning
elsif behavior == :unchanged
:unchanged
else
:subtract
end
super(status, (color || config[:verbose]))
end
def content
@content ||= File.read(destination)
end
def replacement_present?
content.include?(replacement)
end
# Adds the content to the file.
#
def replace!(regexp, string, force)
if force || !replacement_present?
success = content.gsub!(regexp, string)
File.open(destination, "wb") { |file| file.write(content) } unless pretend?
success
end
end
end
end
end
|
