Add functions to quote arguments for cmd.exe. This was needed for the source_cmd function.

tests/test_tools.py

@@ -7,10 +7,11 @@ import nose
 from nose.tools import assert_equal, assert_true, assert_false
 
 from xonsh.lexer import Lexer
-from xonsh.tools import subproc_toks, subexpr_from_unbalanced, is_int, \
-    always_true, always_false, ensure_string, is_env_path, str_to_env_path, \
-    env_path_to_str, escape_windows_title_string, is_bool, to_bool, bool_to_str, \
-    ensure_int_or_slice, is_float, is_string, check_for_partial_string
+from xonsh.tools import ( subproc_toks, subexpr_from_unbalanced, is_int, 
+    always_true, always_false, ensure_string, is_env_path, str_to_env_path, 
+    env_path_to_str, escape_windows_cmd_string, is_bool, to_bool, bool_to_str, 
+    ensure_int_or_slice, is_float, is_string, check_for_partial_string,
+    argvquote )
 
 LEXER = Lexer()
 LEXER.build()
@@ -273,19 +274,37 @@ def test_ensure_int_or_slice():
         obs = ensure_int_or_slice(inp)
         yield assert_equal, exp, obs
 
-def test_escape_windows_title_string():
+
+def test_escape_windows_cmd_string():
     cases = [
         ('', ''),
         ('foo', 'foo'),
         ('foo&bar', 'foo^&bar'),
-        ('foo$?-/_"\\', 'foo$?-/_"\\'),
+        ('foo$?-/_"\\', 'foo$?-/_^"\\'),
         ('^&<>|', '^^^&^<^>^|'),
         ('this /?', 'this /.')
         ]
     for st, esc in cases:
-        obs = escape_windows_title_string(st)
+        obs = escape_windows_cmd_string(st)
         yield assert_equal, esc, obs
 
+
+def test_argvquote():
+    cases = [
+        ('', '""'),
+        ('foo', 'foo'),
+        (r'arg1 "hallo, "world""  "\some\path with\spaces")',
+         r'"arg1 \"hallo, \"world\"\"  \"\some\path with\spaces\")"'),
+        (r'"argument"2" argument3 argument4',
+         r'"\"argument\"2\" argument3 argument4"'),
+        (r'"\foo\bar bar\foo\" arg',
+         r'"\"\foo\bar bar\foo\\\" arg"')
+        ]
+    for st, esc in cases:
+        obs = argvquote(st)
+        yield assert_equal, esc, obs
+
+
 _leaders = ('', 'not empty')
 _r = ('r', '')
 _b = ('b', '')

xonsh/aliases.py

@@ -18,6 +18,7 @@ from xonsh.replay import main as replay_main
 from xonsh.environ import locate_binary
 from xonsh.foreign_shells import foreign_shell_data
 from xonsh.vox import Vox
+from xonsh.tools import argvquote, escape_windows_cmd_string
 
 
 class Aliases(MutableMapping):
@@ -254,8 +255,10 @@ def source_cmd(args, stdin=None):
     args[0] = fpath if fpath else args[0]
     if not os.path.isfile(args[0]):
         raise FileNotFoundError(args[0])
-    prevcmd = 'call {}'.format(' '.join(args))
-    prevcmd += '\necho off'
+    prevcmd = 'call '
+    prevcmd += ' '.join([argvquote(arg,force=True) for arg in args])
+    prevcmd = escape_windows_cmd_string(prevcmd)
+    prevcmd += '\n@echo off'
     args.append('--prevcmd={}'.format(prevcmd))
     args.insert(0, 'cmd')
     args.append('--interactive=0')

xonsh/base_shell.py

@@ -6,7 +6,7 @@ import sys
 import time
 import builtins
 
-from xonsh.tools import XonshError, escape_windows_title_string, ON_WINDOWS, \
+from xonsh.tools import XonshError, escape_windows_cmd_string, ON_WINDOWS, \
     print_exception, HAVE_PYGMENTS
 from xonsh.completer import Completer
 from xonsh.environ import multiline_prompt, format_prompt
@@ -214,7 +214,7 @@ class BaseShell(object):
             return
         t = format_prompt(t)
         if ON_WINDOWS and 'ANSICON' not in env:
-            t = escape_windows_title_string(t)
+            t = escape_windows_cmd_string(t)
             os.system('title {}'.format(t))
         else:
             os.write(1, "\x1b]2;{0}\x07".format(t).encode())

xonsh/tools.py

@@ -410,17 +410,43 @@ def suggestion_sort_helper(x, y):
     return lendiff + inx + iny
 
 
-def escape_windows_title_string(s):
-    """Returns a string that is usable by the Windows cmd.exe title
-    builtin.  The escaping is based on details here and emperical testing:
+def escape_windows_cmd_string(s):
+    """Returns a string that is usable by the Windows cmd.exe.
+    The escaping is based on details here and emperical testing:
     http://www.robvanderwoude.com/escapechars.php
     """
-    for c in '^&<>|':
+    for c in '()%!^<>&|"':
         s = s.replace(c, '^' + c)
     s = s.replace('/?', '/.')
     return s
 
 
+def argvquote(arg, force=False):
+    """ It Converts arguments to a command line such
+    that CommandLineToArgvW will return the argument string unchanged.
+    Arguments in a command line should be separated by spaces; this
+    function does not add these spaces. This follows the suggestions outlined
+    here: https://blogs.msdn.microsoft.com/twistylittlepassagesallalike/2011/04/23/everyone-quotes-command-line-arguments-the-wrong-way/
+    """
+    if not force and len(arg) != 0 and not any([c in arg for c in ' \t\n\v"']):
+        cmdline = arg
+    else:
+        n_backslashes = 0
+        cmdline = '"'
+        for c in arg:
+            if c == '"':
+                cmdline += (n_backslashes * 2 + 1) * '\\'
+            else:
+                cmdline += n_backslashes * '\\'
+            if c != '\\':
+                cmdline += c
+                n_backslashes = 0
+            else:
+                n_backslashes += 1
+        cmdline += n_backslashes * 2 * '\\' + '"'
+    return cmdline
+
+
 def on_main_thread():
     """Checks if we are on the main thread or not."""
     return threading.current_thread() is threading.main_thread()