Use pipes directly, no pexpect on Windows

Author: certik

conda_spawn/shell.py

@@ -169,7 +169,29 @@ def executable(self):
         return "shell"
 
     def args(self):
-        return ()
+        return ("--interact", "--norc")
+
+    def spawn_popen(
+        self, command: Iterable[str] | None = None, **kwargs
+    ) -> subprocess.Popen:
+        try:
+            with NamedTemporaryFile(
+                prefix="conda-spawn-",
+                suffix=self.Activator.script_extension,
+                delete=False,
+                mode="w",
+            ) as f:
+                f.write(self.script())
+            return subprocess.Popen(
+                [self.executable(), *self.args(), f.name], env=self.env(), **kwargs
+            )
+        finally:
+            self._files_to_remove.append(f.name)
+
+    def spawn(self, command: Iterable[str] | None = None) -> int:
+        proc = self.spawn_popen(command)
+        proc.communicate()
+        return proc.wait()
 
 
 class CshShell(Shell):