Merge pull request #725 from ZyX-I/fix-fname-special-chars

Handle non-printable characters properly

powerline/bindings/vim/__init__.py

@@ -1,6 +1,7 @@
 # vim:fileencoding=utf-8:noet
 
 import sys
+import codecs
 
 try:
 	import vim
@@ -113,4 +114,34 @@ class VimEnviron(object):
 					+ value.replace('"', '\\"').replace('\\', '\\\\').replace('\n', '\\n').replace('\0', '')
 					+ '"')
 
+
+if sys.version_info < (3,):
+	def buffer_name(buf):
+		return buf.name
+else:
+	vim_bufname = vim_get_func('bufname')
+	def buffer_name(buf):  # NOQA
+		try:
+			name = buf.name
+		except UnicodeDecodeError:
+			return vim_bufname(buf.number)
+		else:
+			return name.encode('utf-8') if name else None
+
+
+vim_strtrans = vim_get_func('strtrans')
+
+
+def powerline_vim_strtrans_error(e):
+	if not isinstance(e, UnicodeDecodeError):
+		raise NotImplementedError
+	# Assuming &encoding is utf-8 strtrans should not return anything but ASCII 
+	# under current circumstances
+	text = vim_strtrans(e.object[e.start:e.end]).decode()
+	return (text, e.end)
+
+
+codecs.register_error('powerline_vim_strtrans_error', powerline_vim_strtrans_error)
+
+
 environ = VimEnviron()

powerline/renderer.py

@@ -4,12 +4,15 @@ from powerline.theme import Theme
 from unicodedata import east_asian_width, combining
 import os
 
-
 try:
 	NBSP = unicode(' ', 'utf-8')
 except NameError:
 	NBSP = ' '
 
+try:
+	from __builtin__ import unichr as chr
+except ImportError:
+	pass
 
 def construct_returned_value(rendered_highlighted, segments, output_raw):
 	if output_raw:
@@ -65,6 +68,22 @@ class Renderer(object):
 		python-2) regular string or ``None``.
 	'''
 
+	character_translations = {ord(' '): NBSP}
+	'''Character translations for use in escape() function.
+	
+	See documentation of ``unicode.translate`` for details.
+	'''
+
+	np_character_translations = dict(((i, '^' + chr(i + 0x40)) for i in range(0x20)))
+	'''Non-printable character translations
+
+	These are used to transform characters in range 0x00—0x1F into ``^@``, 
+	``^A`` and so on. Unilke with ``.escape()`` method (and 
+	``character_translations``) result is passed to ``.strwidth()`` method.
+
+	Note: transforms tab into ``^I``.
+	'''
+
 	def __init__(self,
 				theme_config,
 				local_themes,
@@ -262,8 +281,8 @@ class Renderer(object):
 					contents_raw = (segment['_space_left'] * ' ') + contents_raw + (segment['_space_right'] * ' ') + outer_padding
 
 			# Replace spaces with no-break spaces
-			contents_raw = contents_raw.replace(' ', NBSP)
 			divider_raw = divider_raw.replace(' ', NBSP)
+			contents_raw = contents_raw.translate(self.np_character_translations)
 
 			# Apply highlighting to padded dividers and contents
 			if render_highlighted:
@@ -295,11 +314,11 @@ class Renderer(object):
 			segment['_len'] = self.strwidth(segment['_rendered_raw'])
 			yield segment
 
-	@staticmethod
-	def escape(string):
+	@classmethod
+	def escape(cls, string):
 		'''Method that escapes segment contents.
 		'''
-		return string
+		return string.translate(cls.character_translations)
 
 	def hlstyle(fg=None, bg=None, attr=None):
 		'''Output highlight style string.

powerline/renderers/bash_prompt.py

@@ -1,5 +1,7 @@
 # vim:fileencoding=utf-8:noet
 
+from __future__ import absolute_import, unicode_literals
+
 from powerline.renderers.shell import ShellRenderer
 
 
@@ -8,9 +10,10 @@ class BashPromptRenderer(ShellRenderer):
 	escape_hl_start = '\['
 	escape_hl_end = '\]'
 
-	@staticmethod
-	def escape(string):
-		return string.replace('\\', '\\\\').replace('$', '\\$').replace('`', '\\`')
+	character_translations = ShellRenderer.character_translations.copy()
+	character_translations[ord('$')] = '\\$'
+	character_translations[ord('`')] = '\\`'
+	character_translations[ord('\\')] = '\\\\'
 
 
 renderer = BashPromptRenderer

powerline/renderers/shell.py

@@ -1,5 +1,7 @@
 # vim:fileencoding=utf-8:noet
 
+from __future__ import absolute_import, unicode_literals
+
 from powerline.renderer import Renderer
 from powerline.colorscheme import ATTR_BOLD, ATTR_ITALIC, ATTR_UNDERLINE
 
@@ -19,6 +21,8 @@ class ShellRenderer(Renderer):
 	tmux_escape = False
 	screen_escape = False
 
+	character_translations = Renderer.character_translations.copy()
+
 	def hlstyle(self, fg=None, bg=None, attr=None):
 		'''Highlight a segment.
 
@@ -62,9 +66,5 @@ class ShellRenderer(Renderer):
 			r = '\033P' + r.replace('\033', '\033\033') + '\033\\'
 		return self.escape_hl_start + r + self.escape_hl_end
 
-	@staticmethod
-	def escape(string):
-		return string.replace('\\', '\\\\')
-
 
 renderer = ShellRenderer

powerline/renderers/tmux.py

@@ -1,11 +1,17 @@
 # vim:fileencoding=utf-8:noet
 
+from __future__ import absolute_import, unicode_literals
+
 from powerline.renderer import Renderer
 from powerline.colorscheme import ATTR_BOLD, ATTR_ITALIC, ATTR_UNDERLINE
 
 
 class TmuxRenderer(Renderer):
 	'''Powerline tmux segment renderer.'''
+
+	character_translations = Renderer.character_translations.copy()
+	character_translations[ord('#')] = '##[]'
+
 	def hlstyle(self, fg=None, bg=None, attr=None):
 		'''Highlight a segment.'''
 		# We don't need to explicitly reset attributes, so skip those calls

powerline/renderers/vim.py

@@ -1,6 +1,6 @@
 # vim:fileencoding=utf-8:noet
 
-from __future__ import absolute_import
+from __future__ import absolute_import, unicode_literals
 
 from powerline.bindings.vim import vim_get_func, environ
 from powerline.renderer import Renderer
@@ -11,6 +11,12 @@ import vim
 import sys
 
 
+try:
+	from __builtin__ import unichr as chr
+except ImportError:
+	pass
+
+
 vim_mode = vim_get_func('mode', rettype=str)
 mode_translations = {
 	chr(ord('V') - 0x40): '^V',
@@ -21,6 +27,9 @@ mode_translations = {
 class VimRenderer(Renderer):
 	'''Powerline vim segment renderer.'''
 
+	character_translations = Renderer.character_translations.copy()
+	character_translations[ord('%')] = '%%'
+
 	def __init__(self, *args, **kwargs):
 		if not hasattr(vim, 'strwidth'):
 			# Hope nobody want to change this at runtime
@@ -97,10 +106,6 @@ class VimRenderer(Renderer):
 	def reset_highlight(self):
 		self.hl_groups.clear()
 
-	@staticmethod
-	def escape(string):
-		return string.replace('%', '%%')
-
 	def hlstyle(self, fg=None, bg=None, attr=None):
 		'''Highlight a segment.
 

powerline/renderers/zsh_prompt.py

@@ -1,5 +1,7 @@
 # vim:fileencoding=utf-8:noet
 
+from __future__ import absolute_import, unicode_literals
+
 from powerline.renderers.shell import ShellRenderer
 
 
@@ -8,9 +10,8 @@ class ZshPromptRenderer(ShellRenderer):
 	escape_hl_start = '%{'
 	escape_hl_end = '%}'
 
-	@staticmethod
-	def escape(string):
-		return string.replace('%', '%%').replace('\\', '\\\\')
+	character_translations = ShellRenderer.character_translations.copy()
+	character_translations[ord('%')] = '%%'
 
 
 renderer = ZshPromptRenderer

powerline/segments/common.py

@@ -1,6 +1,6 @@
 # vim:fileencoding=utf-8:noet
 
-from __future__ import absolute_import
+from __future__ import unicode_literals, absolute_import
 
 import os
 import sys

powerline/segments/vim.py

@@ -1,6 +1,6 @@
 # vim:fileencoding=utf-8:noet
 
-from __future__ import absolute_import, division
+from __future__ import unicode_literals, absolute_import, division
 
 import os
 try:
@@ -8,7 +8,8 @@ try:
 except ImportError:
 	vim = {}  # NOQA
 
-from powerline.bindings.vim import vim_get_func, getbufvar, vim_getbufoption
+from powerline.bindings.vim import (vim_get_func, getbufvar, vim_getbufoption,
+									buffer_name)
 from powerline.theme import requires_segment_info
 from powerline.lib import add_divider_highlight_group
 from powerline.lib.vcs import guess, tree_status
@@ -19,8 +20,8 @@ from collections import defaultdict
 vim_funcs = {
 	'virtcol': vim_get_func('virtcol', rettype=int),
 	'getpos': vim_get_func('getpos'),
-	'fnamemodify': vim_get_func('fnamemodify', rettype=str),
-	'expand': vim_get_func('expand', rettype=str),
+	'fnamemodify': vim_get_func('fnamemodify'),
+	'expand': vim_get_func('expand'),
 	'bufnr': vim_get_func('bufnr', rettype=int),
 	'line2byte': vim_get_func('line2byte', rettype=int),
 	'line': vim_get_func('line', rettype=int),
@@ -157,14 +158,18 @@ def file_directory(pl, segment_info, shorten_user=True, shorten_cwd=True, shorte
 	:param bool shorten_home:
 		shorten all directories in :file:`/home/` to :file:`~user/` instead of :file:`/home/user/`.
 	'''
-	name = segment_info['buffer'].name
+	name = buffer_name(segment_info['buffer'])
 	if not name:
 		return None
+	import sys
 	file_directory = vim_funcs['fnamemodify'](name, (':~' if shorten_user else '')
 												+ (':.' if shorten_cwd else '') + ':h')
+	if not file_directory:
+		return None
 	if shorten_home and file_directory.startswith('/home/'):
-		file_directory = '~' + file_directory[6:]
-	return file_directory + os.sep if file_directory else None
+		file_directory = b'~' + file_directory[6:]
+	file_directory = file_directory.decode('utf-8', 'powerline_vim_strtrans_error')
+	return file_directory + os.sep
 
 
 @requires_segment_info
@@ -178,7 +183,7 @@ def file_name(pl, segment_info, display_no_file=False, no_file_text='[No file]')
 
 	Highlight groups used: ``file_name_no_file`` or ``file_name``, ``file_name``.
 	'''
-	name = segment_info['buffer'].name
+	name = buffer_name(segment_info['buffer'])
 	if not name:
 		if display_no_file:
 			return [{
@@ -187,8 +192,7 @@ def file_name(pl, segment_info, display_no_file=False, no_file_text='[No file]')
 			}]
 		else:
 			return None
-	file_name = vim_funcs['fnamemodify'](name, ':~:.:t')
-	return file_name
+	return os.path.basename(name).decode('utf-8', 'powerline_vim_strtrans_error')
 
 
 @window_cached

tests/test_segments.py

@@ -1,5 +1,7 @@
 # vim:fileencoding=utf-8:noet
 
+from __future__ import unicode_literals
+
 from powerline.segments import shell, common
 import tests.vim as vim_module
 import sys
@@ -467,6 +469,10 @@ class TestVim(TestCase):
 		segment_info = vim_module._get_segment_info()
 		self.assertEqual(vim.file_directory(pl=pl, segment_info=segment_info), None)
 		with replace_env('HOME', '/home/foo', os.environ):
+			with vim_module._with('buffer', '/tmp/’’/abc') as segment_info:
+				self.assertEqual(vim.file_directory(pl=pl, segment_info=segment_info), '/tmp/’’/')
+			with vim_module._with('buffer', b'/tmp/\xFF\xFF/abc') as segment_info:
+				self.assertEqual(vim.file_directory(pl=pl, segment_info=segment_info), '/tmp/<ff><ff>/')
 			with vim_module._with('buffer', '/tmp/abc') as segment_info:
 				self.assertEqual(vim.file_directory(pl=pl, segment_info=segment_info), '/tmp/')
 				os.environ['HOME'] = '/tmp'
@@ -484,6 +490,8 @@ class TestVim(TestCase):
 			self.assertEqual(vim.file_name(pl=pl, segment_info=segment_info), 'abc')
 		with vim_module._with('buffer', '/tmp/’’') as segment_info:
 			self.assertEqual(vim.file_name(pl=pl, segment_info=segment_info), '’’')
+		with vim_module._with('buffer', b'/tmp/\xFF\xFF') as segment_info:
+			self.assertEqual(vim.file_name(pl=pl, segment_info=segment_info), '<ff><ff>')
 
 	def test_file_size(self):
 		pl = Pl()

tests/test_shells/bash.ok

@@ -7,4 +7,12 @@
   HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  false
   HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  1  kill `cat pid` ; sleep 1s
 [1]+  Terminated              bash -c "echo \$\$>pid ; while true ; do sleep 0.1s ; done"
-  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  false
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  cd "$DIR1"
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^[[32m  cd ../"$DIR2"
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^H  cd ../'\[\]'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  \[\]  cd ../'%%'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  %%  cd ../'#[bold]'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  #[bold]  cd ../'(echo)'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  (echo)  cd ../'$(echo)'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  $(echo)  cd ../'`echo`'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  `echo`  false

tests/test_shells/fish.ok

@@ -6,3 +6,11 @@
   HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  
   HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  1  
   HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^[[32m  
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^H  
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  \[\]  
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  %%  
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  #[bold]  
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  (echo)  
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  $(echo)  
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  `echo`  

tests/test_shells/input.bash

@@ -10,6 +10,14 @@ VIRTUAL_ENV=
 bash -c "echo \$\$>pid ; while true ; do sleep 0.1s ; done" &
 false
 kill `cat pid` ; sleep 1s
+cd "$DIR1"
+cd ../"$DIR2"
+cd ../'\[\]'
+cd ../'%%'
+cd ../'#[bold]'
+cd ../'(echo)'
+cd ../'$(echo)'
+cd ../'`echo`'
 false
 true is the last line
 exit

tests/test_shells/input.fish

@@ -11,6 +11,14 @@ set VIRTUAL_ENV
 bash -c "echo \$\$>pid ; while true ; do sleep 0.1s ; done" &
 false
 kill (cat pid) ; sleep 1s
+cd "$DIR1"
+cd ../"$DIR2"
+cd ../'\[\]'
+cd ../'%%'
+cd ../'#[bold]'
+cd ../'(echo)'
+cd ../'$(echo)'
+cd ../'`echo`'
 false
 true is the last line
 exit

tests/test_shells/input.zsh

@@ -11,6 +11,14 @@ VIRTUAL_ENV=
 bash -c "echo \$\$>pid ; while true ; do sleep 0.1s ; done" &
 false
 kill `cat pid` ; sleep 1s
+cd "$DIR1"
+cd ../"$DIR2"
+cd ../'\[\]'
+cd ../'%%'
+cd ../'#[bold]'
+cd ../'(echo)'
+cd ../'$(echo)'
+cd ../'`echo`'
 false
 true is the last line
 exit

tests/test_shells/postproc.py

@@ -8,11 +8,11 @@ import sys
 import codecs
 
 
-fname = sys.argv[1]
-new_fname = fname + '.new'
-pid_fname = 'tests/shell/3rd/pid'
+shell = sys.argv[1]
+fname = os.path.join('tests', 'shell', shell + '.full.log')
+new_fname = os.path.join('tests', 'shell', shell + '.log')
+pid_fname = os.path.join('tests', 'shell', '3rd', 'pid')
 
-shell = sys.argv[2]
 
 with open(pid_fname, 'r') as P:
 	pid = P.read().strip()
@@ -42,5 +42,3 @@ with codecs.open(fname, 'r', encoding='utf-8') as R:
 				except ValueError:
 					line = ''
 			W.write(line)
-
-os.rename(new_fname, fname)

tests/test_shells/screenrc

@@ -1,3 +1,3 @@
 width  1024
 height    1
-logfile "tests/shell/screen.log"
+logfile "tests/shell/${SH}.full.log"

tests/test_shells/test.sh

@@ -3,11 +3,12 @@ FAILED=0
 ONLY_SHELL="$1"
 
 check_screen_log() {
-	if test -e tests/test_shells/${1}.ok ; then
-		diff -u tests/test_shells/${1}.ok tests/shell/screen.log
+	SH="$1"
+	if test -e tests/test_shells/${SH}.ok ; then
+		diff -u tests/test_shells/${SH}.ok tests/shell/${SH}.log
 		return $?
 	else
-		cat tests/shell/screen.log
+		cat tests/shell/${SH}.log
 		return 1
 	fi
 }
@@ -20,22 +21,21 @@ run_test() {
 
 	which "${SH}" || return 0
 
+	export SH
+
 	screen -L -c tests/test_shells/screenrc -d -m -S "$SESNAME" \
 		env LANG=en_US.UTF-8 BINDFILE="$BINDFILE" "$@"
 	screen -S "$SESNAME" -X readreg a tests/test_shells/input.$SH
 	# Wait for screen to initialize
 	sleep 1s
 	screen -S "$SESNAME" -p 0 -X width 300 1
-	screen -S "$SESNAME" -p 0 -X logfile tests/shell/screen.log
 	screen -S "$SESNAME" -p 0 -X paste a
 	# Wait for screen to exit (sending command to non-existing screen session 
 	# fails; when launched instance exits corresponding session is deleted)
 	while screen -S "$SESNAME" -X blankerprg "" > /dev/null ; do
 		sleep 0.1s
 	done
-	cp tests/shell/screen.log tests/shell/${SH}.full.log
-	./tests/test_shells/postproc.py tests/shell/screen.log ${SH}
-	cp tests/shell/screen.log tests/shell/${SH}.log
+	./tests/test_shells/postproc.py ${SH}
 	if ! check_screen_log ${SH} ; then
 		echo '____________________________________________________________'
 		# Repeat the diff to make it better viewable in travis output
@@ -52,10 +52,8 @@ run_test() {
 		cat -v tests/shell/${SH}.full.log
 		echo '____________________________________________________________'
 		${SH} --version
-		rm tests/shell/screen.log
 		return 1
 	fi
-	rm tests/shell/screen.log
 	return 0
 }
 
@@ -63,6 +61,16 @@ test -d tests/shell && rm -r tests/shell
 mkdir tests/shell
 git init tests/shell/3rd
 git --git-dir=tests/shell/3rd/.git checkout -b BRANCH
+export DIR1=""
+export DIR2=""
+mkdir tests/shell/3rd/"$DIR1"
+mkdir tests/shell/3rd/"$DIR2"
+mkdir tests/shell/3rd/'\[\]'
+mkdir tests/shell/3rd/'%%'
+mkdir tests/shell/3rd/'#[bold]'
+mkdir tests/shell/3rd/'(echo)'
+mkdir tests/shell/3rd/'$(echo)'
+mkdir tests/shell/3rd/'`echo`'
 
 if ! run_test bash --norc --noprofile -i ; then
 	FAILED=1

tests/test_shells/zsh.ok

@@ -8,4 +8,12 @@
   HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  false
   HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  1  1  kill `cat pid` ; sleep 1s
 [1]  + terminated  bash -c "echo \$\$>pid ; while true ; do sleep 0.1s ; done"
-  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  false
+  HOSTNAME  USER   BRANCH  ⋯  tests  shell  3rd  cd "$DIR1"
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^[[32m  cd ../"$DIR2"
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  ^H  cd ../'\[\]'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  \[\]  cd ../'%%'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  %%  cd ../'#[bold]'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  #[bold]  cd ../'(echo)'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  (echo)  cd ../'$(echo)'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  $(echo)  cd ../'`echo`'
+  HOSTNAME  USER   BRANCH  ⋯  shell  3rd  `echo`  false

tests/vim.py

@@ -60,7 +60,7 @@ class _Buffers(object):
 
 	@_vim
 	def __nonzero__(self):
-		return not not self.d
+		return bool(self.d)
 
 	@_vim
 	def keys(self):
@@ -261,8 +261,8 @@ def _emul_getpos(expr):
 def _emul_fnamemodify(path, modstring):
 	import os
 	_modifiers = {
-		'~': lambda path: path.replace(os.environ['HOME'], '~') if path.startswith(os.environ['HOME']) else path,
-		'.': lambda path: (lambda tpath: path if tpath[:3] == '..' + os.sep else tpath)(os.path.relpath(path)),
+		'~': lambda path: path.replace(os.environ['HOME'].encode('utf-8'), b'~') if path.startswith(os.environ['HOME'].encode('utf-8')) else path,
+		'.': lambda path: (lambda tpath: path if tpath[:3] == b'..' + os.sep.encode() else tpath)(os.path.relpath(path)),
 		't': lambda path: os.path.basename(path),
 		'h': lambda path: os.path.dirname(path),
 	}
@@ -313,6 +313,22 @@ def _emul_line(expr):
 	raise NotImplementedError
 
 
+@_vim
+@_str_func
+def _emul_strtrans(s):
+	# FIXME Do more replaces
+	return s.replace(b'\xFF', b'<ff>')
+
+
+@_vim
+@_str_func
+def _emul_bufname(bufnr):
+	try:
+		return buffers[bufnr]._name or b''
+	except KeyError:
+		return b''
+
+
 _window_ids = [None]
 _window_id = 0
 
@@ -348,11 +364,11 @@ _undo_written = {}
 class _Buffer(object):
 	def __init__(self, name=None):
 		global _last_bufnr
-		import os
 		_last_bufnr += 1
 		bufnr = _last_bufnr
 		self.number = bufnr
-		self.name = os.path.abspath(name) if name else None
+		# FIXME Use unicode() for python-3
+		self.name = name
 		self.vars = {}
 		self.options = {
 			'modified': 0,
@@ -369,6 +385,25 @@ class _Buffer(object):
 		_undo_written[bufnr] = len(_undostate[bufnr])
 		buffers[bufnr] = self
 
+	@property
+	def name(self):
+		import sys
+		if sys.version_info < (3,):
+			return self._name
+		else:
+			return str(self._name, 'utf-8') if self._name else None
+
+	@name.setter
+	def name(self, name):
+		if name is None:
+			self._name = None
+		else:
+			import os
+			if type(name) is not bytes:
+				name = name.encode('utf-8')
+			import sys
+			self._name = os.path.abspath(name)
+
 	def __getitem__(self, line):
 		return _buf_lines[self.number][line]
 
@@ -676,3 +711,7 @@ def _with(key, *args, **kwargs):
 		return _WithDict(vars, **kwargs)
 	elif key == 'split':
 		return _WithSplit()
+
+
+class error(Exception):
+	pass