Class: Pry::Editor

Inherits:
Object show all
Includes:
Helpers::CommandHelpers
Defined in:
lib/pry/editor.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Helpers::CommandHelpers

#absolute_index_number, #absolute_index_range, #get_method_or_raise, #internal_binding?, #one_index_number, #one_index_range, #one_index_range_or_number, #restrict_to_lines, #set_file_and_dir_locals, #temp_file, #unindent

Methods included from Helpers::OptionsHelpers

method_object, #method_object, method_options, #method_options

Constructor Details

#initialize(pry_instance) ⇒ Editor

Returns a new instance of Editor.


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# File 'lib/pry/editor.rb', line 27

def initialize(pry_instance)
  @pry_instance = pry_instance
end

Instance Attribute Details

#pry_instance ⇒ Object (readonly)

Returns the value of attribute pry_instance


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# File 'lib/pry/editor.rb', line 25

def pry_instance
  @pry_instance
end

Class Method Details

.default ⇒ Object 


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# File 'lib/pry/editor.rb', line 7

def self.default
  if (visual = Pry::Env['VISUAL'])
    return visual
  end

  if (editor = Pry::Env['EDITOR'])
    return editor
  end

  return 'notepad' if Helpers::Platform.windows?

  %w[editor nano vi].find do |editor_exe|
    Kernel.system("which #{editor_exe} > /dev/null 2>&1")
  end
end

Instance Method Details

#blocking_flag_for_editor(blocking) ⇒ Object (private)

Some editors that run outside the terminal allow you to control whether or not to block the process from which they were launched (in this case, Pry). For those editors, return the flag that produces the desired behavior.


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# File 'lib/pry/editor.rb', line 100

def blocking_flag_for_editor(blocking)
  case editor_name
  when /^emacsclient/
    '--no-wait' unless blocking
  when /^[gm]vim/
    '--nofork' if blocking
  when /^jedit/
    '-wait' if blocking
  when /^mate/, /^subl/, /^redcar/
    '-w' if blocking
  end
end

#build_editor_invocation_string(file, line, blocking) ⇒ Object

Generate the string that's used to start the editor. This includes all the flags we want as well as the file and line number we want to open at.


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# File 'lib/pry/editor.rb', line 60

def build_editor_invocation_string(file, line, blocking)
  if pry_instance.config.editor.respond_to?(:call)
    args = [file, line, blocking][0...(pry_instance.config.editor.arity)]
    pry_instance.config.editor.call(*args)
  else
    sanitized_file = Helpers::Platform.windows? ? file : Shellwords.escape(file)
    editor = pry_instance.config.editor
    flag = blocking_flag_for_editor(blocking)
    start_line = start_line_syntax_for_editor(sanitized_file, line)
    "#{editor} #{flag} #{start_line}"
  end
end

#edit_tempfile_with_content(initial_content, line = 1) ⇒ Object 


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# File 'lib/pry/editor.rb', line 31

def edit_tempfile_with_content(initial_content, line = 1)
  temp_file do |f|
    f.puts(initial_content)
    f.flush
    f.close(false)
    invoke_editor(f.path, line, true)
    File.read(f.path)
  end
end

#editor_name ⇒ Object (private)

Get the name of the binary that Pry.config.editor points to.

This is useful for deciding which flags we pass to the editor as we can just use the program's name and ignore any absolute paths.

Examples:

Pry.config.editor="/home/conrad/bin/textmate -w"
editor_name
# => textmate

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# File 'lib/pry/editor.rb', line 151

def editor_name
  File.basename(pry_instance.config.editor).split(" ").first
end

#invoke_editor(file, line, blocking = true) ⇒ Object 


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# File 'lib/pry/editor.rb', line 41

def invoke_editor(file, line, blocking = true)
  unless pry_instance.config.editor
    raise CommandError,
          "Please set Pry.config.editor or export $VISUAL or $EDITOR"
  end

  editor_invocation = build_editor_invocation_string(file, line, blocking)
  return nil unless editor_invocation

  if Helpers::Platform.jruby?
    open_editor_on_jruby(editor_invocation)
  else
    open_editor(editor_invocation)
  end
end

#open_editor(editor_invocation) ⇒ Object (private)

Start the editor running, using the calculated invocation string


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# File 'lib/pry/editor.rb', line 76

def open_editor(editor_invocation)
  # Note we dont want to use Pry.config.system here as that
  # may be invoked non-interactively (i.e via Open4), whereas we want to
  # ensure the editor is always interactive
  system(*Shellwords.split(editor_invocation)) ||
    raise(
      CommandError,
      "`#{editor_invocation}` gave exit status: #{$CHILD_STATUS.exitstatus}"
    )
end

#open_editor_on_jruby(editor_invocation) ⇒ Object (private)

We need JRuby specific code here cos just shelling out using system() appears to be pretty broken :/


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# File 'lib/pry/editor.rb', line 89

def open_editor_on_jruby(editor_invocation)
  require 'spoon'
  pid = Spoon.spawnp(*Shellwords.split(editor_invocation))
  Process.waitpid(pid)
rescue FFI::NotFoundError
  system(editor_invocation)
end

#start_line_syntax_for_editor(file_name, line_number) ⇒ Object (private)

Return the syntax for a given editor for starting the editor and moving to a particular line within that file


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# File 'lib/pry/editor.rb', line 115

def start_line_syntax_for_editor(file_name, line_number)
  # special case for 1st line
  return file_name if line_number <= 1

  case editor_name
  when /^[gm]?vi/, /^emacs/, /^nano/, /^pico/, /^gedit/, /^kate/
    "+#{line_number} #{file_name}"
  when /^mate/, /^geany/
    "-l #{line_number} #{file_name}"
  when /^subl/
    "#{file_name}:#{line_number}"
  when /^uedit32/
    "#{file_name}/#{line_number}"
  when /^jedit/
    "#{file_name} +line:#{line_number}"
  when /^redcar/
    "-l#{line_number} #{file_name}"
  else
    if Helpers::Platform.windows?
      file_name.to_s
    else
      "+#{line_number} #{file_name}"
    end
  end
end