Revert "Don’t change the working directory on Windows"

This reverts commit 3af60ba.

This might no longer be needed.

elisp/process.cc

@@ -451,12 +451,8 @@ absl::StatusOr<int> Run(const std::string_view binary,
   final_args.insert(final_args.end(), runfiles_args.begin(),
                     runfiles_args.end());
   final_args.insert(final_args.end(), args.begin(), args.end());
-  absl::StatusOr<Environment> orig_env = CopyEnv();
+  const absl::StatusOr<Environment> orig_env = CopyEnv();
   if (!orig_env.ok()) return orig_env.status();
-  // We don’t want the Python launcher to change the current working directory,
-  // otherwise relative filenames will be all messed up.  See
-  // https://github.com/bazelbuild/bazel/issues/7190.
-  orig_env->erase(RULES_ELISP_NATIVE_LITERAL("RUN_UNDER_RUNFILES"));
   map->insert(orig_env->begin(), orig_env->end());
   std::vector<NativeString> final_env;
   for (const auto& [key, value] : *map) {

elisp/run_binary.py

@@ -53,10 +53,6 @@ def main() -> None:
     parser.add_argument('argv', nargs='+')
     opts = parser.parse_args()
     env: dict[str, str] = dict(os.environ)
-    # We don’t want the Python launcher to change the current working directory,
-    # otherwise relative filenames will be all messed up.  See
-    # https://github.com/bazelbuild/bazel/issues/7190.
-    env.pop('RUN_UNDER_RUNFILES', None)
     run_files = runfiles.Runfiles(dict(opts.runfiles_env))
     emacs = run_files.resolve(opts.wrapper)
     args: list[str] = [str(emacs)]

elisp/run_emacs.py

@@ -1,4 +1,4 @@
-# Copyright 2021, 2022, 2023 Google LLC
+# Copyright 2021, 2022, 2023, 2024 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -55,10 +55,6 @@ def main() -> None:
                    EMACSDOC=str(etc),
                    EMACSLOADPATH=str(shared / 'lisp'),
                    EMACSPATH=str(libexec))
-        # We don’t want the Python launcher to change the current working
-        # directory, otherwise relative filenames will be all messed up.  See
-        # https://github.com/bazelbuild/bazel/issues/7190.
-        env.pop('RUN_UNDER_RUNFILES', None)
         env.update(opts.env)
         env.update(run_files.environment())
         if os.name == 'nt':

elisp/run_test.py

@@ -62,10 +62,6 @@ def main() -> None:
     logging.basicConfig(level=logging.INFO,
                         format='%(asctime)s %(levelname)s %(name)s %(message)s')
     env: dict[str, str] = dict(os.environ)
-    # We don’t want the Python launcher to change the current working directory,
-    # otherwise relative filenames will be all messed up.  See
-    # https://github.com/bazelbuild/bazel/issues/7190.
-    env.pop('RUN_UNDER_RUNFILES', None)
     run_files = runfiles.Runfiles(dict(opts.runfiles_env))
     emacs = run_files.resolve(opts.wrapper)
     args: list[str] = [str(emacs)]