Module: Freyia::Automations

Included in:
Setup
Defined in:
lib/freyia/automations.rb,
lib/freyia/automations/directory.rb,
lib/freyia/automations/create_file.rb,
lib/freyia/automations/create_link.rb,
lib/freyia/automations/empty_directory.rb,
lib/freyia/automations/inject_into_file.rb,
lib/freyia/automations/file_manipulation.rb

Defined Under Namespace

Classes: CapturableERB, CreateFile, CreateLink, Directory, EmptyDirectory, InjectIntoFile

Constant Summary collapse

WARNINGS = 
{
  unchanged_no_flag: "File unchanged! Either the supplied flag value not found or the " \
                     "content has already been inserted!",
}.freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.escape_globs(path) ⇒ String

Returns a string that has had any glob characters escaped. The glob characters are ‘* ? { } [ ]`.

Examples:

Freya::Automations.escape_globs('[apps]')   # => '\[apps\]'


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# File 'lib/freyia/automations.rb', line 20

def self.escape_globs(path)
  path.to_s.gsub(%r{[*?{}\[\]]}, '\\\\\\&')
end

Instance Method Details

#append_to_file(path, *args) ⇒ Object Also known as: append_file

Append text to a file. Since it depends on insert_into_file, it’s reversible.

Parameters

path<String>

path of the file to be changed

data<String>

the data to append to the file, can be also given as a block.

config<Hash>

give :verbose => false to not log the status.

Example

append_to_file 'config/environments/test.rb', 'config.gem "rspec"'

append_to_file 'config/environments/test.rb' do
  'config.gem "rspec"'
end



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# File 'lib/freyia/automations/file_manipulation.rb', line 196

def append_to_file(path, *args, &)
  config = args.last.is_a?(Hash) ? args.pop : {}
  config[:before] = %r{\z}
  insert_into_file(path, *(args << config), &)
end

#apply(path, config = {}) ⇒ Object

Loads an external file and execute it in the instance binding.

Parameters

path<String>

The path to the file to execute. Can be a web address or a relative path from the source root.

Examples

apply "http://gist.github.com/103208"

apply "recipes/jquery.rb"



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# File 'lib/freyia/automations.rb', line 136

def apply(path, config = {})
  verbose = config.fetch(:verbose, true)
  is_uri  = path =~ %r{^https?://}
  path    = find_in_source_paths(path) unless is_uri

  say_status :apply, path, verbose
  shell.padding += 1 if verbose

  contents = if is_uri
               require "open-uri"
               URI.open(path, "Accept" => "application/x-freyia-template", &:read) # rubocop:disable Security/Open
             else
               File.read(path)
             end

  instance_eval(contents, path)
  shell.padding -= 1 if verbose
end

#chmod(path, mode, config = {}) ⇒ Object

Changes the mode of the given file or directory.

Parameters

mode<Integer>

the file mode

path<String>

the name of the file to change mode

config<Hash>

give :verbose => false to not log the status.

Example

chmod "script/server", 0755



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# File 'lib/freyia/automations/file_manipulation.rb', line 150

def chmod(path, mode, config = {})
  path = File.expand_path(path, destination_root)
  say_status :chmod, relative_to_original_destination_root(path), config.fetch(:verbose, true)
  return if options[:pretend]

  require "fileutils"
  FileUtils.chmod_R(mode, path)
end

#comment_lines(path, flag) ⇒ Object

Comment all lines matching a given regex. It will leave the space which existed before the beginning of the line in tact and will insert a single space after the comment hash.

Parameters

path<String>

path of the file to be changed

flag<Regexp|String>

the regexp or string used to decide which lines to comment

config<Hash>

give :verbose => false to not log the status.

Example

comment_lines 'config/initializers/session_store.rb', /cookie_store/



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# File 'lib/freyia/automations/file_manipulation.rb', line 339

def comment_lines(path, flag, *)
  flag = flag.source if flag.respond_to?(:source)

  gsub_file(path, %r{^(\s*)([^#\n]*#{flag})}, '\1# \2', *)
end

#copy_file(source, *args, &block) ⇒ Object

Copies the file from the relative source to the relative destination. If the destination is not given it’s assumed to be equal to the source.

Parameters

source<String>

the relative path to the source root.

destination<String>

the relative path to the destination root.

config<Hash>

give :verbose => false to not log the status, and :mode => :preserve, to preserve the file mode from the source.

Examples

copy_file "README", "doc/README"

copy_file "doc/README"



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# File 'lib/freyia/automations/file_manipulation.rb', line 22

def copy_file(source, *args, &block)
  config = args.last.is_a?(Hash) ? args.pop : {}
  destination = args.first || source
  source = File.expand_path(find_in_source_paths(source.to_s))

  resulting_destination = create_file destination, nil, config do
    content = File.binread(source)
    content = yield(content) if block
    content
  end
  return unless config[:mode] == :preserve

  mode = File.stat(source).mode
  chmod(resulting_destination, mode, config)
end

#create_file(destination, *args, &block) ⇒ Object Also known as: add_file

Create a new file relative to the destination root with the given data, which is the return value of a block or a data string.

Parameters

destination<String>

the relative path to the destination root.

data<String|NilClass>

the data to append to the file.

config<Hash>

give :verbose => false to not log the status.

Examples

create_file "lib/fun_party.rb" do
  hostname = ask("What is the virtual hostname I should use?")
  "vhost.name = #{hostname}"
end

create_file "config/apache.conf", "your apache config"



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# File 'lib/freyia/automations/create_file.rb', line 24

def create_file(destination, *args, &block)
  config = args.last.is_a?(Hash) ? args.pop : {}
  data = args.first
  CreateFile.new(self, destination, block || data.to_s, config).()
end

#create_link(destination, *args) ⇒ Object Also known as: add_link

Create a new file relative to the destination root from the given source.

Parameters

destination<String>

the relative path to the destination root.

source<String|NilClass>

the relative path to the source root.

config<Hash>

give :verbose => false to not log the status.

give :symbolic => false for hard link.

Examples

create_link "config/apache.conf", "/etc/apache.conf"



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# File 'lib/freyia/automations/create_link.rb', line 19

def create_link(destination, *args)
  config = args.last.is_a?(Hash) ? args.pop : {}
  source = args.first
  CreateLink.new(self, destination, source, config).()
end

#destination_root ⇒ Object

Returns the root for this freyia class (also aliased as destination root).



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# File 'lib/freyia/automations.rb', line 26

def destination_root
  @destination_stack.last
end

#destination_root=(root) ⇒ Object

Sets the root for this freyia class. Relatives path are added to the directory where the script was invoked and expanded.



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# File 'lib/freyia/automations.rb', line 33

def destination_root=(root)
  @destination_stack ||= []
  @destination_stack[0] = File.expand_path(root || "")
end

#directory(source, *args) ⇒ Object

Copies recursively the files from source directory to root directory. If any of the files finishes with .tt, it’s considered to be a template and is placed in the destination without the extension .tt. If any empty directory is found, it’s copied and all .empty_directory files are ignored. If any file name is wrapped within % signs, the text within the % signs will be executed as a method and replaced with the returned value. Let’s suppose a doc directory with the following files:

doc/
  components/.empty_directory
  README
  rdoc.rb.tt
  %app_name%.rb

When invoked as:

directory "doc"

It will create a doc directory in the destination with the following files (assuming that the ‘app_name` method returns the value “blog”):

doc/
  components/
  README
  rdoc.rb
  blog.rb

Encoded path note: Since Freyia internals use Object#respond_to? to check if it can expand %something%, this ‘something` should be a public method in the class calling #directory. If a method is private, Freyia stack raises PrivateMethodEncodedError.

Parameters

source<String>

the relative path to the source root.

destination<String>

the relative path to the destination root.

config<Hash>

give :verbose => false to not log the status. If :recursive => false, does not look for paths recursively. If :mode => :preserve, preserve the file mode from the source. If :exclude_pattern => /regexp/, prevents copying files that match that regexp.

Examples

directory "doc"
directory "doc", "docs", :recursive => false



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# File 'lib/freyia/automations/directory.rb', line 51

def directory(source, *args, &)
  config = args.last.is_a?(Hash) ? args.pop : {}
  destination = args.first || source
  Directory.new(self, source, destination || source, config, &).()
end

#empty_directory(destination, config = {}) ⇒ Object

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"



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# File 'lib/freyia/automations/empty_directory.rb', line 15

def empty_directory(destination, config = {})
  EmptyDirectory.new(self, destination, config).()
end

#find_in_source_paths(file) ⇒ Object

Receives a file or directory and search for it in the source paths.

Raises:



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# File 'lib/freyia/automations.rb', line 55

def find_in_source_paths(file)
  possible_files = [file, file + TEMPLATE_EXTNAME]
  relative_root = relative_to_original_destination_root(destination_root, remove_dot: false)

  source_paths.each do |source|
    possible_files.each do |f|
      source_file = File.expand_path(f, File.join(source, relative_root))
      return source_file if File.exist?(source_file)
    end
  end

  message = "Could not find #{file.inspect} in any of your source paths. "

  message << if source_paths.empty?
               "Currently you have no source paths."
             else
               "Your current source paths are: \n#{source_paths.join("\n")}"
             end

  raise Error, message
end

#get(source, *args, &block) ⇒ Object

Gets the content at the given address and places it at the given relative destination. If a block is given instead of destination, the content of the url is yielded and used as location.

get relies on open-uri, so passing application user input would provide a command injection attack vector.

Parameters

source<String>

the address of the given content.

destination<String>

the relative path to the destination root.

config<Hash>

give :verbose => false to not log the status, and :http_headers => <Hash> to add headers to an http request.

Examples

get "http://gist.github.com/103208", "doc/README"

get "http://gist.github.com/103208", "doc/README", :http_headers => {"Content-Type" => "application/json"}

get "http://gist.github.com/103208" do |content|
  content.split("\n").first
end



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# File 'lib/freyia/automations/file_manipulation.rb', line 83

def get(source, *args, &block) # rubocop:todo Metrics
  config = args.last.is_a?(Hash) ? args.pop : {}
  destination = args.first

  render = if %r{^https?://}.match?(source)
             require "open-uri"
             URI.send(:open, source, config.fetch(:http_headers, {})) do |input|
               input.binmode.read
             end
           else
             source = File.expand_path(find_in_source_paths(source.to_s))
             File.open(source) { |input| input.binmode.read }
           end

  destination ||= if block_given?
                    block.arity == 1 ? yield(render) : yield
                  else
                    File.basename(source)
                  end

  create_file destination, render, config
end

#gsub_file(path, flag, *args) ⇒ Object

Run a regular expression replacement on a file.

Parameters

path<String>

path of the file to be changed

flag<Regexp|String>

the regexp or string to be replaced

replacement<String>

the replacement, can be also given as a block

config<Hash>

give :verbose => false to not log the status, and :force => true, to force the replacement regardless of runner behavior.

Example

gsub_file 'app/controllers/application_controller.rb',
          /#\s*(filter_parameter_logging :password)/, '\1'

gsub_file 'README', /rake/, :green do |match|
  match << " no more. Use freyia!"
end



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# File 'lib/freyia/automations/file_manipulation.rb', line 299

def gsub_file(path, flag, *args, &)
  config = args.last.is_a?(Hash) ? args.pop : {}

  path = File.expand_path(path, destination_root)
  say_status :gsub, relative_to_original_destination_root(path), config.fetch(:verbose, true)

  actually_gsub_file(path, flag, args, false, &) unless options[:pretend]
end

#gsub_file!(path, flag, *args) ⇒ Object

Run a regular expression replacement on a file, raising an error if the contents of the file are not changed.

Parameters

path<String>

path of the file to be changed

flag<Regexp|String>

the regexp or string to be replaced

replacement<String>

the replacement, can be also given as a block

config<Hash>

give :verbose => false to not log the status, and :force => true, to force the replacement regardless of runner behavior.

Example

gsub_file! 'app/controllers/application_controller.rb',
           /#\s*(filter_parameter_logging :password)/, '\1'

gsub_file! 'README', /rake/, :green do |match|
  match << " no more. Use freyia!"
end



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# File 'lib/freyia/automations/file_manipulation.rb', line 272

def gsub_file!(path, flag, *args, &)
  config = args.last.is_a?(Hash) ? args.pop : {}

  path = File.expand_path(path, destination_root)
  say_status :gsub, relative_to_original_destination_root(path), config.fetch(:verbose, true)

  actually_gsub_file(path, flag, args, true, &) unless options[:pretend]
end

#in_root ⇒ Object

Goes to the root and execute the given block.



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# File 'lib/freyia/automations.rb', line 120

def in_root(&)
  inside(@destination_stack.first, &)
end

#inject_into_class(path, klass, *args) ⇒ Object

Injects text right after the class definition. Since it depends on insert_into_file, it’s reversible.

Parameters

path<String>

path of the file to be changed

klass<String|Class>

the class to be manipulated

data<String>

the data to append to the class, can be also given as a block.

config<Hash>

give :verbose => false to not log the status.

Examples

inject_into_class "app/controllers/application_controller.rb",
                  "ApplicationController",
                  "  filter_parameter :password\n"

inject_into_class "app/controllers/application_controller.rb", "ApplicationController" do
  "  filter_parameter :password\n"
end



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# File 'lib/freyia/automations/file_manipulation.rb', line 222

def inject_into_class(path, klass, *args, &)
  config = args.last.is_a?(Hash) ? args.pop : {}
  config[:after] = %r{class #{klass}\n|class #{klass} .*\n}
  insert_into_file(path, *(args << config), &)
end

#inject_into_module(path, module_name, *args) ⇒ Object

Injects text right after the module definition. Since it depends on insert_into_file, it’s reversible.

Parameters

path<String>

path of the file to be changed

module_name<String|Class>

the module to be manipulated

data<String>

the data to append to the class, can be also given as a block.

config<Hash>

give :verbose => false to not log the status.

Examples

inject_into_module "app/helpers/application_helper.rb",
                   "ApplicationHelper",
                   "  def help; 'help'; end\n"

inject_into_module "app/helpers/application_helper.rb", "ApplicationHelper" do
  "  def help; 'help'; end\n"
end



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# File 'lib/freyia/automations/file_manipulation.rb', line 247

def inject_into_module(path, module_name, *args, &)
  config = args.last.is_a?(Hash) ? args.pop : {}
  config[:after] = %r{module #{module_name}\n|module #{module_name} .*\n}
  insert_into_file(path, *(args << config), &)
end

#insert_into_file(destination, *args, &block) ⇒ Object Also known as: inject_into_file

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 :freyia",
                 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



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# File 'lib/freyia/automations/inject_into_file.rb', line 63

def insert_into_file(destination, *args, &block)
  data = block_given? ? block : args.shift

  config = args.shift || {}
  config[:after] = %r{\z} unless config.key?(:before) || config.key?(:after)

  InjectIntoFile.new(self, destination, data, config).()
end

#insert_into_file!(destination, *args, &block) ⇒ Object Also known as: inject_into_file!

Injects the given content into a file, raising an error if the contents of the file are not changed. 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 :freyia",
                 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



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# File 'lib/freyia/automations/inject_into_file.rb', line 32

def insert_into_file!(destination, *args, &block)
  data = block_given? ? block : args.shift

  config = args.shift || {}
  config[:after] = %r{\z} unless config.key?(:before) || config.key?(:after)
  config = config.merge({ error_on_no_change: true })

  InjectIntoFile.new(self, destination, data, config).()
end

#inside(dir = "", config = {}, &block) ⇒ Object

Do something in the root or on a provided subfolder. If a relative path is given it’s referenced from the current root. The full path is yielded to the block you provide. The path is set back to the previous path when the method exits.

Returns the value yielded by the block.

Parameters

dir<String>

the directory to move to.

config<Hash>

give :verbose => true to log and use padding.



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# File 'lib/freyia/automations.rb', line 88

def inside(dir = "", config = {}, &block) # rubocop:todo Metrics
  verbose = config.fetch(:verbose, false)
  pretend = options[:pretend]

  say_status :inside, dir, verbose
  shell.padding += 1 if verbose
  @destination_stack.push File.expand_path(dir, destination_root)

  # If the directory doesn't exist and we're not pretending
  if !File.exist?(destination_root) && !pretend
    require "fileutils"
    FileUtils.mkdir_p(destination_root)
  end

  result = nil
  if pretend
    # In pretend mode, just yield down to the block
    result = block.arity == 1 ? yield(destination_root) : yield
  else
    require "fileutils"
    FileUtils.cd(destination_root) do
      result = block.arity == 1 ? yield(destination_root) : yield
    end
  end

  @destination_stack.pop
  shell.padding -= 1 if verbose
  result
end

#link_file(source, *args) ⇒ Object

Links the file from the relative source to the relative destination. If the destination is not given it’s assumed to be equal to the source.

Parameters

source<String>

the relative path to the source root.

destination<String>

the relative path to the destination root.

config<Hash>

give :verbose => false to not log the status.

Examples

link_file "README", "doc/README"

link_file "doc/README"



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# File 'lib/freyia/automations/file_manipulation.rb', line 52

def link_file(source, *args)
  config = args.last.is_a?(Hash) ? args.pop : {}
  destination = args.first || source
  source = File.expand_path(find_in_source_paths(source.to_s))

  create_link destination, source, config
end

#prepend_to_file(path, *args) ⇒ Object Also known as: prepend_file

Prepend text to a file. Since it depends on insert_into_file, it’s reversible.

Parameters

path<String>

path of the file to be changed

data<String>

the data to prepend to the file, can be also given as a block.

config<Hash>

give :verbose => false to not log the status.

Example

prepend_to_file 'config/environments/test.rb', 'config.gem "rspec"'

prepend_to_file 'config/environments/test.rb' do
  'config.gem "rspec"'
end



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# File 'lib/freyia/automations/file_manipulation.rb', line 174

def prepend_to_file(path, *args, &)
  config = args.last.is_a?(Hash) ? args.pop : {}
  config[:after] = %r{\A}
  insert_into_file(path, *(args << config), &)
end

#relative_to_original_destination_root(path, remove_dot: true) ⇒ Object

Returns the given path relative to the absolute root (ie, root where the script started).



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# File 'lib/freyia/automations.rb', line 41

def relative_to_original_destination_root(path, remove_dot: true)
  root = @destination_stack[0]
  if path.start_with?(root) && [File::SEPARATOR, File::ALT_SEPARATOR, nil,
                                "",].include?(path[root.size..root.size])
    path = path.dup
    path[0...root.size] = "."
    remove_dot ? (path[2..] || "") : path
  else
    path
  end
end

#remove_file(path, config = {}) ⇒ Object Also known as: remove_dir

Removes a file at the given location.

Parameters

path<String>

path of the file to be changed

config<Hash>

give :verbose => false to not log the status.

Example

remove_file 'README'
remove_file 'app/controllers/application_controller.rb'



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# File 'lib/freyia/automations/file_manipulation.rb', line 356

def remove_file(path, config = {})
  return unless behavior == :invoke

  path = File.expand_path(path, destination_root)

  say_status :remove, relative_to_original_destination_root(path), config.fetch(:verbose, true)
  return unless !options[:pretend] && (File.exist?(path) || File.symlink?(path))

  require "fileutils"
  ::FileUtils.rm_rf(path)
end

#run(command, config = {}) ⇒ Object

Executes a command returning the contents of the command.

Parameters

command<String>

the command to be executed.

config<Hash>

give :verbose => false to not log the status, :capture => true to hide to output. Specify :with to append an executable to command execution.

Example

inside('vendor') do
  run('ln -s ~/edge rails')
end



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# File 'lib/freyia/automations.rb', line 168

def run(command, config = {}) # rubocop:todo Metrics
  destination = relative_to_original_destination_root(destination_root, remove_dot: false)
  desc = "#{command} from #{destination.inspect}"

  if config[:with]
    desc = "#{File.basename(config[:with].to_s)} #{desc}"
    command = "#{config[:with]} #{command}"
  end

  say_status :run, desc, config.fetch(:verbose, true)

  return if options[:pretend]

  env_splat = [config[:env]] if config[:env]

  if config[:capture]
    require "open3"
    result, status = Open3.capture2e(*env_splat, command.to_s)
    success = status.success?
  else
    result = system(*env_splat, command.to_s)
    success = result
  end

  abort if !success &&
    config.fetch(:abort_on_failure,
                 self.class.respond_to?(:exit_on_failure?) && self.class.exit_on_failure?)

  result
end

#template(source, *args, &block) ⇒ Object

Gets an ERB template at the relative source, executes it and makes a copy at the relative destination. If the destination is not given it’s assumed to be equal to the source removing .tt from the filename.

Parameters

source<String>

the relative path to the source root.

destination<String>

the relative path to the destination root.

config<Hash>

give :verbose => false to not log the status.

Examples

template "README", "doc/README"

template "doc/README"



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# File 'lib/freyia/automations/file_manipulation.rb', line 121

def template(source, *args, &block)
  config = args.last.is_a?(Hash) ? args.pop : {}
  destination = args.first || source.sub(%r{#{TEMPLATE_EXTNAME}$}o, "")

  source  = File.expand_path(find_in_source_paths(source.to_s))
  context = config.delete(:context) || instance_eval("binding", __FILE__, __LINE__)

  create_file destination, nil, config do
    capturable_erb = CapturableERB.new(::File.binread(source), trim_mode: "-",
                                                               eoutvar: "@output_buffer")
    content = capturable_erb.tap do |erb|
      erb.filename = source
    end.result(context)
    content = yield(content) if block
    content
  end
end

#uncomment_lines(path, flag) ⇒ Object

Uncomment all lines matching a given regex. Preserves indentation before the comment hash and removes the hash and any immediate following space.

Parameters

path<String>

path of the file to be changed

flag<Regexp|String>

the regexp or string used to decide which lines to uncomment

config<Hash>

give :verbose => false to not log the status.

Example

uncomment_lines 'config/initializers/session_store.rb', /active_record/



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# File 'lib/freyia/automations/file_manipulation.rb', line 320

def uncomment_lines(path, flag, *)
  flag = flag.source if flag.respond_to?(:source)

  gsub_file(path, %r{^(\s*)#[[:blank:]]?(.*#{flag})}, '\1\2', *)
end