module Thor::Util - thor 1.2.2 documentation

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

Parameters¶ ↑

String

Returns¶ ↑

String

# File 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)

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

Examples¶ ↑

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

Parameters¶ ↑

String

Returns¶ ↑

String

# File lib/thor/util.rb, line 264
def escape_globs(path)
  path.to_s.gsub(/[*?{}\[\]]/, '\\\\\\&')
end

escape_html (string)

Returns a string that has had any HTML characters escaped.

Examples¶ ↑

Thor::Util.escape_html('<div>')   # => "&lt;div&gt;"

Parameters¶ ↑

String

Returns¶ ↑

String

# File lib/thor/util.rb, line 280
def escape_html(string)
  CGI.escapeHTML(string)
end

find_by_namespace (namespace)

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

Parameters¶ ↑

namespace<String>: The namespace to search for.

# File lib/thor/util.rb, line 24
def find_by_namespace(namespace)
  namespace = "default#{namespace}" if namespace.empty? || namespace =~ /^:/
  Thor::Base.subclasses.detect { |klass| klass.namespace == namespace }
end

find_class_and_command_by_namespace (namespace, fallback = true)

Receives a namespace and tries to retrieve a Thor or 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 < Thor
  def baz
  end
end

class Baz::Foo < Thor::Group
end

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

Parameters¶ ↑

namespace<String>

# File 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, command  = namespace.split(":")
    namespace = pieces.join(":")
    namespace = "default" if namespace.empty?
    klass = Thor::Base.subclasses.detect { |thor| thor.namespace == namespace && thor.command_exists?(command) }
  end
  unless klass # look for a Thor::Group with the right name
    klass = Thor::Util.find_by_namespace(namespace)
    command = nil
  end
  if !klass && fallback # try a command in the default namespace
    command = namespace
    klass   = Thor::Util.find_by_namespace("")
  end
  [klass, command]
end

Also aliased as: find_class_and_task_by_namespace

find_class_and_task_by_namespace (namespace, fallback = true)

Alias for: find_class_and_command_by_namespace

globs_for (path)

Where to look for Thor files.

# File lib/thor/util.rb, line 213
def globs_for(path)
  path = escape_globs(path)
  ["#{path}/Thorfile", "#{path}/*.thor", "#{path}/tasks/*.thor", "#{path}/lib/tasks/**/*.thor"]
end

load_thorfile (path, content = nil, debug = false)

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

# File lib/thor/util.rb, line 153
def load_thorfile(path, content = nil, debug = false)
  content ||= File.read(path)

  begin
    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)

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

This method should not be used in general because it’s used to deal with older versions of 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/thor/util.rb, line 43
def namespace_from_thor_class(constant)
  constant = constant.to_s.gsub(/^Thor::Sandbox::/, "")
  constant = snake_case(constant).squeeze(":")
  constant
end

namespaces_in_content (contents, file = __FILE__)

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

Parameters¶ ↑

contents<String>

Returns¶ ↑

Array

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

  load_thorfile(file, contents)

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

  new_constants.map!(&:namespace)
  new_constants.compact!
  new_constants
end

ruby_command ()

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

# File lib/thor/util.rb, line 221
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 Lint/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)

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

Parameters¶ ↑

String

Returns¶ ↑

String

# File lib/thor/util.rb, line 90
def snake_case(str)
  return str.downcase if str =~ /^[A-Z_]+$/
  str.gsub(/\B[A-Z]/, '_\&').squeeze("_") =~ /_*(.*)/
  Regexp.last_match(-1).downcase
end

thor_classes_in (klass)

Returns the thor classes declared inside the given class.

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

thor_root ()

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

# File lib/thor/util.rb, line 192
def thor_root
  File.join(user_home, ".thor").tr("\\", "/")
end

thor_root_glob ()

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/thor/util.rb, line 203
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 ()

# File lib/thor/util.rb, line 168
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