add cmd which supply 'sys_argv' method to gain command line from console and its testcase

pydu/cmd.py

@@ -0,0 +1,42 @@
+import sys
+from pydu import WINDOWS
+from pydu.compat import PY2
+
+
+if PY2 and WINDOWS:
+    # https://bitbucket.org/techtonik/python-wget
+    def sys_argv():
+        """
+        Uses shell32.GetCommandLineArgvW to get sys.argv as a list of Unicode
+        strings.
+
+        Versions 2.x of Python don't support Unicode in sys.argv on Windows,
+        with the underlying Windows API instead replacing multi-byte characters
+        with '?'.
+        """
+        from ctypes import POINTER, byref, cdll, c_int, windll
+        from ctypes.wintypes import LPCWSTR, LPWSTR
+
+        GetCommandLineW = cdll.kernel32.GetCommandLineW
+        GetCommandLineW.argtypes = []
+        GetCommandLineW.restype = LPCWSTR
+
+        CommandLineToArgvW = windll.shell32.CommandLineToArgvW
+        CommandLineToArgvW.argtypes = [LPCWSTR, POINTER(c_int)]
+        CommandLineToArgvW.restype = POINTER(LPWSTR)
+
+        cmd = GetCommandLineW()
+        argc = c_int(0)
+        raw_argv = CommandLineToArgvW(cmd, byref(argc))
+        argnum = argc.value
+        sysnum = len(sys.argv)
+        argv = []
+        if argnum > 0:
+            # Remove Python executable and commands if present
+            start = argnum - sysnum
+            for i in range(start, argnum):
+                argv.append(raw_argv[i])
+        return argv
+else:
+    def sys_argv():
+        return sys.argv

tests/test_cmd.py

@@ -0,0 +1,8 @@
+from pydu.compat import text_type
+from pydu.cmd import sys_argv
+
+
+def test_sys_argv():
+    argv = sys_argv()
+    for s in argv[1:]:
+        assert isinstance(s, text_type)