new_contents: # This file is a minimal clang-format sublime-integration. To install:
  # - Change 'binary' if clang-format is not on the path (see below).
  # - Put this file into your sublime Packages directory, e.g. on Linux:
  #     ~/.config/sublime-text-2/Packages/User/clang-format-sublime.py
  # - Add a key binding:
  #     { "keys": ["ctrl+shift+c"], "command": "clang_format" },
  #
  # With this integration you can press the bound key and clang-format will
  # format the current lines and selections for all cursor positions. The lines
  # or regions are extended to the next bigger syntactic entities.
  #
  # It operates on the current, potentially unsaved buffer and does not create
  # or save any files. To revert a formatting, just undo.
  
  import sublime
  import sublime_plugin
  import subprocess
  
  # Change this to the full path if clang-format is not on the path.
  binary = 'clang-format'
  
  # Change this to format according to other formatting styles
  # (see clang-format -help).
  style = 'LLVM'
  
  class ClangFormatCommand(sublime_plugin.TextCommand):
    def run(self, edit):
      encoding = self.view.encoding()
      if encoding == 'Undefined':
        encoding = 'utf-8'
      regions = []
      command = [binary, '-style', style]
      for region in self.view.sel():
        regions.append(region)
        region_offset = min(region.a, region.b)
        region_length = abs(region.b - region.a)
        command.extend(['-offset', str(region_offset),
                        '-length', str(region_length)])
      old_viewport_position = self.view.viewport_position()
      buf = self.view.substr(sublime.Region(0, self.view.size()))
      p = subprocess.Popen(command, stdout=subprocess.PIPE,
                           stderr=subprocess.PIPE, stdin=subprocess.PIPE)
      output, error = p.communicate(buf.encode(encoding))
      if not error:
        self.view.replace(
            edit, sublime.Region(0, self.view.size()),
            output.decode(encoding))
        self.view.sel().clear()
        for region in regions:
          self.view.sel().add(region)
        # FIXME: Without the 10ms delay, the viewport sometimes jumps.
        sublime.set_timeout(lambda: self.view.set_viewport_position(
          old_viewport_position, False), 10)
      else:
        print error
  
subject: Add basic clang-format integration for sublime text.