Update repo_launcher to 2.40

Bug: 1515383
Change-Id: Iaae10a7482e09943ea8b84bb97d97ebbf2dff642
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5166208
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Auto-Submit: Josip Sokcevic <sokcevic@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>

repo_launcher

@@ -79,17 +79,6 @@ def check_python_version():
     major = ver.major
     minor = ver.minor
 
-    # Abort on very old Python 2 versions.
-    if (major, minor) < (2, 7):
-        print(
-            "repo: error: Your Python version is too old. "
-            "Please use Python {}.{} or newer instead.".format(
-                *MIN_PYTHON_VERSION_SOFT
-            ),
-            file=sys.stderr,
-        )
-        sys.exit(1)
-
     # Try to re-exec the version specific Python 3 if needed.
     if (major, minor) < MIN_PYTHON_VERSION_SOFT:
         # Python makes releases ~once a year, so try our min version +10 to help
@@ -134,16 +123,7 @@ def check_python_version():
             reexec("python3")
 
         # We're still here, so diagnose things for the user.
-        if major < 3:
-            print(
-                "repo: error: Python 2 is no longer supported; "
-                "Please upgrade to Python {}.{}+.".format(
-                    *MIN_PYTHON_VERSION_HARD
-                ),
-                file=sys.stderr,
-            )
-            sys.exit(1)
-        elif (major, minor) < MIN_PYTHON_VERSION_HARD:
+        if (major, minor) < MIN_PYTHON_VERSION_HARD:
             print(
                 "repo: error: Python 3 version is too old; "
                 "Please use Python {}.{} or newer.".format(
@@ -170,7 +150,7 @@ if not REPO_REV:
 BUG_URL = "https://issues.gerritcodereview.com/issues/new?component=1370071"
 
 # increment this whenever we make important changes to this script
-VERSION = (2, 39)
+VERSION = (2, 40)
 
 # increment this if the MAINTAINER_KEYS block is modified
 KEYRING_VERSION = (2, 3)
@@ -274,19 +254,8 @@ import optparse
 import re
 import shutil
 import stat
-
-
-if sys.version_info[0] == 3:
 import urllib.error
 import urllib.request
-else:
-    import imp
-
-    import urllib2
-
-    urllib = imp.new_module("urllib")
-    urllib.request = urllib2
-    urllib.error = urllib2
 
 
 repo_config_dir = os.getenv("REPO_CONFIG_DIR", os.path.expanduser("~"))
@@ -1525,6 +1494,14 @@ def main(orig_args):
     if reqs:
         reqs.assert_all()
 
+    # Python 3.11 introduces PYTHONSAFEPATH and the -P flag which, if enabled,
+    # does not prepend the script's directory to sys.path by default.
+    # repo relies on this import path, so add directory of REPO_MAIN to
+    # PYTHONPATH so that this continues to work when PYTHONSAFEPATH is enabled.
+    python_paths = os.environ.get("PYTHONPATH", "").split(os.pathsep)
+    new_python_paths = [os.path.join(rel_repo_dir, S_repo)] + python_paths
+    os.environ["PYTHONPATH"] = os.pathsep.join(new_python_paths)
+
     ver_str = ".".join(map(str, VERSION))
     me = [
         sys.executable,