From eda62139d838f53e4953db26019e5a4b8b805847 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Mon, 22 Apr 2024 13:11:05 +0200
Subject: [PATCH 1/2] gnulib-tool.py: Fix trouble caused by Python's bytecode
 cache.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Reported by Paul Eggert in
<https://lists.gnu.org/archive/html/bug-gnulib/2024-04/msg00367.html>.

* gnulib-tool.py: Set PYTHONPYCACHEPREFIX, so as to avoid creating a
__pycache__ directory in the developer's gnulib checkout (only effective
with Python ≥ 3.8).
---
 ChangeLog      | 9 +++++++++
 gnulib-tool.py | 6 ++++++
 2 files changed, 15 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index b3cef64936..4a272d326e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2024-04-22  Bruno Haible  <bruno@clisp.org>
+
+	gnulib-tool.py: Fix trouble caused by Python's bytecode cache.
+	Reported by Paul Eggert in
+	<https://lists.gnu.org/archive/html/bug-gnulib/2024-04/msg00367.html>.
+	* gnulib-tool.py: Set PYTHONPYCACHEPREFIX, so as to avoid creating a
+	__pycache__ directory in the developer's gnulib checkout (only effective
+	with Python ≥ 3.8).
+
 2024-04-21  Collin Funk  <collin.funk1@gmail.com>
 
 	gnulib-tool.py: Make temporary directories recognizable.
diff --git a/gnulib-tool.py b/gnulib-tool.py
index cdcd316909..81537c272c 100755
--- a/gnulib-tool.py
+++ b/gnulib-tool.py
@@ -144,6 +144,12 @@
   func_fatal_error "python3 not found; try setting GNULIB_TOOL_IMPL=sh"
 fi
 
+# Tell Python to store the compiled bytecode outside the gnulib directory.
+if test -z "$PYTHONPYCACHEPREFIX"; then
+  PYTHONPYCACHEPREFIX="${TMPDIR-/tmp}/gnulib-python-cache-${USER-$LOGNAME}"
+  export PYTHONPYCACHEPREFIX
+fi
+
 profiler_args=
 # For profiling, cf. <https://docs.python.org/3/library/profile.html>.
 #profiler_args="-m cProfile -s tottime"
-- 
2.34.1