module Bundler::Thor::Util

This module holds several utilities:

1) Methods to convert thor namespaces to constants and vice-versa.

Bundler::Thor::Util.namespace_from_thor_class(Foo::Bar::Baz) #=> "foo:bar:baz"

2) Loading thor files and sandboxing:

Bundler::Thor::Util.load_thorfile("~/.thor/foo")

Public Class Methods

camel_case(str) click to toggle source

Receives a string and convert it to camel case. ::camel_case returns CamelCase.

Parameters

String

Returns

String

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 104
def camel_case(str)
  return str if str !~ /_/ && str =~ /[A-Z]+.*/
  str.split("_").map(&:capitalize).join
end
escape_globs(path) click to toggle source

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

Examples

Bundler::Thor::Util.escape_globs('[apps]')   # => '\[apps\]'

Parameters

String

Returns

String

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 263
def escape_globs(path)
  path.to_s.gsub(/[*?{}\[\]]/, '\\\\\\&')
end
find_by_namespace(namespace) click to toggle source

Receives a namespace and search for it in the Bundler::Thor::Base subclasses.

Parameters

namespace<String>

The namespace to search for.

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 24
def find_by_namespace(namespace)
  namespace = "default#{namespace}" if namespace.empty? || namespace =~ /^:/
  Bundler::Thor::Base.subclasses.detect { |klass| klass.namespace == namespace }
end
find_class_and_command_by_namespace(namespace, fallback = true) click to toggle source

Receives a namespace and tries to retrieve a Bundler::Thor or Bundler::Thor::Group class from it. It first searches for a class using the all the given namespace, if it's not found, removes the highest entry and searches for the class again. If found, returns the highest entry as the class name.

Examples

class Foo::Bar < Bundler::Thor
  def baz
  end
end

class Baz::Foo < Bundler::Thor::Group
end

Bundler::Thor::Util.namespace_to_thor_class("foo:bar")     #=> Foo::Bar, nil # will invoke default command
Bundler::Thor::Util.namespace_to_thor_class("baz:foo")     #=> Baz::Foo, nil
Bundler::Thor::Util.namespace_to_thor_class("foo:bar:baz") #=> Foo::Bar, "baz"

Parameters

namespace<String>

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 131
def find_class_and_command_by_namespace(namespace, fallback = true)
  if namespace.include?(":") # look for a namespaced command
    pieces  = namespace.split(":")
    command = pieces.pop
    klass   = Bundler::Thor::Util.find_by_namespace(pieces.join(":"))
  end
  unless klass # look for a Bundler::Thor::Group with the right name
    klass = Bundler::Thor::Util.find_by_namespace(namespace)
    command = nil
  end
  if !klass && fallback # try a command in the default namespace
    command = namespace
    klass   = Bundler::Thor::Util.find_by_namespace("")
  end
  [klass, command]
end
find_class_and_task_by_namespace(namespace, fallback = true)
globs_for(path) click to toggle source

Where to look for Bundler::Thor files.

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 212
def globs_for(path)
  path = escape_globs(path)
  ["#{path}/Bundler::Thorfile", "#{path}/*.thor", "#{path}/tasks/*.thor", "#{path}/lib/tasks/*.thor"]
end
load_thorfile(path, content = nil, debug = false) click to toggle source

Receives a path and load the thor file in the path. The file is evaluated inside the sandbox to avoid namespacing conflicts.

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 152
def load_thorfile(path, content = nil, debug = false)
  content ||= File.binread(path)

  begin
    Bundler::Thor::Sandbox.class_eval(content, path)
  rescue StandardError => e
    $stderr.puts("WARNING: unable to load thorfile #{path.inspect}: #{e.message}")
    if debug
      $stderr.puts(*e.backtrace)
    else
      $stderr.puts(e.backtrace.first)
    end
  end
end
namespace_from_thor_class(constant) click to toggle source

Receives a constant and converts it to a Bundler::Thor namespace. Since Bundler::Thor commands can be added to a sandbox, this method is also responsable for removing the sandbox namespace.

This method should not be used in general because it's used to deal with older versions of Bundler::Thor. On current versions, if you need to get the namespace from a class, just call namespace on it.

Parameters

constant<Object>

The constant to be converted to the thor path.

Returns

String

If we receive Foo::Bar::Baz it returns “foo:bar:baz”

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 43
def namespace_from_thor_class(constant)
  constant = constant.to_s.gsub(/^Bundler::Thor::Sandbox::/, "")
  constant = snake_case(constant).squeeze(":")
  constant
end
namespaces_in_content(contents, file = __FILE__) click to toggle source

Given the contents, evaluate it inside the sandbox and returns the namespaces defined in the sandbox.

Parameters

contents<String>

Returns

Array

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 58
def namespaces_in_content(contents, file = __FILE__)
  old_constants = Bundler::Thor::Base.subclasses.dup
  Bundler::Thor::Base.subclasses.clear

  load_thorfile(file, contents)

  new_constants = Bundler::Thor::Base.subclasses.dup
  Bundler::Thor::Base.subclasses.replace(old_constants)

  new_constants.map!(&:namespace)
  new_constants.compact!
  new_constants
end
ruby_command() click to toggle source

Return the path to the ruby interpreter taking into account multiple installations and windows extensions.

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 220
def ruby_command
  @ruby_command ||= begin
    ruby_name = RbConfig::CONFIG["ruby_install_name"]
    ruby = File.join(RbConfig::CONFIG["bindir"], ruby_name)
    ruby << RbConfig::CONFIG["EXEEXT"]

    # avoid using different name than ruby (on platforms supporting links)
    if ruby_name != "ruby" && File.respond_to?(:readlink)
      begin
        alternate_ruby = File.join(RbConfig::CONFIG["bindir"], "ruby")
        alternate_ruby << RbConfig::CONFIG["EXEEXT"]

        # ruby is a symlink
        if File.symlink? alternate_ruby
          linked_ruby = File.readlink alternate_ruby

          # symlink points to 'ruby_install_name'
          ruby = alternate_ruby if linked_ruby == ruby_name || linked_ruby == ruby
        end
      rescue NotImplementedError # rubocop:disable HandleExceptions
        # just ignore on windows
      end
    end

    # escape string in case path to ruby executable contain spaces.
    ruby.sub!(/.*\s.*/m, '"\&"')
    ruby
  end
end
snake_case(str) click to toggle source

Receives a string and convert it to snake case. SnakeCase returns snake_case.

Parameters

String

Returns

String

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 90
def snake_case(str)
  return str.downcase if str =~ /^[A-Z_]+$/
  str.gsub(/\B[A-Z]/, '_\&').squeeze("_") =~ /_*(.*)/
  $+.downcase
end
thor_classes_in(klass) click to toggle source

Returns the thor classes declared inside the given class.

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 74
def thor_classes_in(klass)
  stringfied_constants = klass.constants.map(&:to_s)
  Bundler::Thor::Base.subclasses.select do |subclass|
    next unless subclass.name
    stringfied_constants.include?(subclass.name.gsub("#{klass.name}::", ""))
  end
end
thor_root() click to toggle source

Returns the root where thor files are located, depending on the OS.

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 191
def thor_root
  File.join(user_home, ".thor").tr('\\', "/")
end
thor_root_glob() click to toggle source

Returns the files in the thor root. On Windows ::thor_root will be something like this:

C:\Documents and Settings\james\.thor

If we don't gsub the \ character, Dir.glob will fail.

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 202
def thor_root_glob
  files = Dir["#{escape_globs(thor_root)}/*"]

  files.map! do |file|
    File.directory?(file) ? File.join(file, "main.thor") : file
  end
end
user_home() click to toggle source
# File lib/bundler/vendor/thor/lib/thor/util.rb, line 167
def user_home
  @@user_home ||= if ENV["HOME"]
    ENV["HOME"]
  elsif ENV["USERPROFILE"]
    ENV["USERPROFILE"]
  elsif ENV["HOMEDRIVE"] && ENV["HOMEPATH"]
    File.join(ENV["HOMEDRIVE"], ENV["HOMEPATH"])
  elsif ENV["APPDATA"]
    ENV["APPDATA"]
  else
    begin
      File.expand_path("~")
    rescue
      if File::ALT_SEPARATOR
        "C:/"
      else
        "/"
      end
    end
  end
end