hooks: tensorflow: automatically raise recursion limit

Several tests on the CI are throwing recursion error with
`tensorflow` 2.18.0 installed, so have `tensorflow` hook automatically
raise the recursion limit to 5000 (unless it is already at higher
value).

The problem does not seem to be tied to this `tensorflow` version
(building in a clean environment with just `tensorflow` and its
dependencies installed seems to pass without errors), but rather
to specific import chains that involve `tensorflow` but also depend
on the build environment (i.e., other packages installed in it).

_pyinstaller_hooks_contrib/stdhooks/hook-tensorflow.py

@@ -10,6 +10,8 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 # ------------------------------------------------------------------
 
+import sys
+
 from _pyinstaller_hooks_contrib.compat import importlib_metadata
 from packaging.version import Version
 
@@ -23,6 +25,14 @@
     logger,
 )
 
+# Automatically raise recursion limit to ensure it is at least 5000; this attempts to mitigate recursion limit errors
+# caused by some import chains that involve tensorflow, but also depend on the build environment (i.e., other packages
+# installed in it).
+new_limit = 5000
+if sys.getrecursionlimit() < new_limit:
+    logger.info("hook-tensorflow: raising recursion limit to %d", new_limit)
+    sys.setrecursionlimit(new_limit)
+
 # Determine the name of `tensorflow` dist; this is available under different names (releases vs. nightly, plus build
 # variants). We need to determine the dist that we are dealing with, so we can query its version and metadata.
 _CANDIDATE_DIST_NAMES = (

news/825.update.rst

@@ -0,0 +1,4 @@
+Update ``tensorflow`` hook to automatically raise recursion limit to
+5000 (if not already set to a higher value) in order to avoid recursion
+limit errors in certain import chains (dependent on build environment
+and other packages installed in it).