minimal support for subprocess execution on windows

Author: timfel

graalpython/lib-python/3/subprocess.py

@@ -1705,6 +1705,23 @@ def _execute_child(self, args, executable, preexec_fn, close_fds,
             else:
                 args = list(args)
 
+            # Truffle change
+            if sys.platform == 'win32':
+                if executable is None and len(args) == 1:
+                    import shlex
+                    executable = next(shlex.shlex(list2cmdline(args)))
+                    if executable.startswith('"') and executable.endswith('"'):
+                        executable = executable[1:-1]
+                if (len(args) == 1 and executable != args[0]) or shell:
+                    shell = False
+                    comspec = os.environ.get("COMSPEC", "cmd.exe")
+                    executable = comspec
+                    if len(args) == 1:
+                        args = [comspec, "/u", "/c", *args]
+                    else:
+                        args = [comspec, "/u", "/c", list2cmdline(args)]
+            # End Truffle change
+
             if shell:
                 # On Android the default shell is at '/system/bin/sh'.
                 unix_shell = ('/system/bin/sh' if