Revert "Remove the custom logic for the run command"

This reverts commit 65ba952f.

poetry/console/args/run_args_parser.py

+from clikit.api.args import Args
+from clikit.api.args import RawArgs
+from clikit.api.args.format import ArgsFormat
+from clikit.api.args.format import ArgsFormatBuilder
+from clikit.args import DefaultArgsParser
+
+
+class RunArgsParser(DefaultArgsParser):
+    """
+    Parser that just parses command names and leave the rest
+    alone to be passed to the command.
+    """
+
+    def parse(
+        self, args, fmt, lenient=False
+    ):  # type: (RawArgs, ArgsFormat, bool) -> Args
+        builder = ArgsFormatBuilder()
+        builder.set_command_names(*fmt.get_command_names())
+        builder.set_arguments(*fmt.get_arguments().values())
+        fmt = builder.format
+
+        return super(RunArgsParser, self).parse(args, fmt, True)
+
+    def _parse(
+        self, raw_args, fmt, lenient
+    ):  # type: (RawArgs, ArgsFormat, bool) -> None
+        """
+        Parse everything as a single, multi-valued argument.
+        """
+        tokens = raw_args.tokens[:]
+
+        last_arg = list(fmt.get_arguments().values())[-1]
+        self._arguments[last_arg.name] = []
+
+        while True:
+            try:
+                token = tokens.pop(0)
+            except IndexError:
+                break
+
+            self._arguments[last_arg.name].append(token)

poetry/console/commands/run.py

@@ -12,6 +12,13 @@ class RunCommand(EnvCommand):
         argument("args", "The command and arguments/options to run.", multiple=True)
         argument("args", "The command and arguments/options to run.", multiple=True)
     ]
     ]
 
 
+    def __init__(self):  # type: () -> None
+        from poetry.console.args.run_args_parser import RunArgsParser
+
+        super(RunCommand, self).__init__()
+
+        self.config.set_args_parser(RunArgsParser())
+
     def handle(self):
     def handle(self):
         args = self.argument("args")
         args = self.argument("args")
         script = args[0]
         script = args[0]