Merge pull request #13166 from hukkin/rm-re-import

Remove `import re` from script template

Author: notatallshaw

news/13165.feature.rst

@@ -0,0 +1 @@
+Speed up small CLI tools by removing ``import re`` from the executable template.

src/pip/_internal/operations/install/wheel.py

@@ -12,6 +12,7 @@
 import re
 import shutil
 import sys
+import textwrap
 import warnings
 from base64 import urlsafe_b64encode
 from collections.abc import Generator, Iterable, Iterator, Sequence
@@ -403,6 +404,19 @@ def _raise_for_invalid_entrypoint(specification: str) -> None:
 
 
 class PipScriptMaker(ScriptMaker):
+    # Override distlib's default script template with one that
+    # doesn't import `re` module, allowing scripts to load faster.
+    script_template = textwrap.dedent(
+        """\
+        import sys
+        from %(module)s import %(import_name)s
+        if __name__ == '__main__':
+            if sys.argv[0].endswith('.exe'):
+                sys.argv[0] = sys.argv[0][:-4]
+            sys.exit(%(func)s())
+"""
+    )
+
     def make(
         self, specification: str, options: dict[str, Any] | None = None
     ) -> list[str]: