Subject: Re: bug#30335: ‘make uninstall’ exceeds command-line length limit
From: Mathieu Lirzin <[email-masked]>
To: [email-masked]
Date: Sun, 18 Feb 2018 14:13:33 +0100
List-Id: <debbugs-submit.debbugs.gnu.org>

Mathieu Lirzin <[email-masked]> writes:

> "t/instmany-python.sh" test fails for the ‘uninstall’ target.

This is fixed by commit 006c4dfede96091f5bed622c17946cbec067347f

From 006c4dfede96091f5bed622c17946cbec067347f Mon Sep 17 00:00:00 2001
From: Mathieu Lirzin <[email-masked]>
Date: Sun, 4 Feb 2018 00:09:31 +0100
Subject: [PATCH] python: Avoid exceeding command-line length limit
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

With Python implementations following PEP-3174, a large number of files
are installed in the ‘__pycache__’ directory.  As a consequence
“t/instmany-python.sh” test was failing due to the
‘uninstall-pythonPYTHON’ target deleting installed files in a single
‘rm’ command.  Doing that in multiple steps avoids exceeding the
command-line length limit.  This fixes bug#30335.

* lib/am/python.am (uninstall-%DIR%PYTHON): For byte-compiled files
installed in '__pycache__' directory, uninstall them by batch of 40.
[?FIRST?] (am__pep3147_tweak): Adapt.
---
 lib/am/python.am | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/lib/am/python.am b/lib/am/python.am
index e29ecfcd0..21e6f842c 100644
--- a/lib/am/python.am
+++ b/lib/am/python.am
@@ -97,7 +97,7 @@ endif %?INSTALL%
 if %?INSTALL%
 
 ?FIRST?am__pep3147_tweak = \
-?FIRST?  sed -e 's|\.py$$||' -e 's|[^/]*$$|__pycache__/&.*.py|'
+?FIRST?  sed -e 's|\.py$$||' -e 's|[^/]*$$|&.*.pyc\n&.*.pyo|'
 
 .PHONY uninstall-am: uninstall-%DIR%PYTHON
 uninstall-%DIR%PYTHON:
@@ -108,26 +108,19 @@ uninstall-%DIR%PYTHON:
 	test -n "$$py_files" || exit 0; \
 	dir='$(DESTDIR)$(%NDIR%dir)'; \
 ## Also remove the .pyc and .pyo byte compiled versions.
-## This is somewhat tricky, because for newer pythons we have to take
-## PEP-3147 into account.
 	pyc_files=`echo "$$py_files" | sed 's|$$|c|'`; \
 	pyo_files=`echo "$$py_files" | sed 's|$$|o|'`; \
-	py_files_pep3147=`echo "$$py_files" | $(am__pep3147_tweak)`; \
-	echo "$$py_files_pep3147";\
-	pyc_files_pep3147=`echo "$$py_files_pep3147" | sed 's|$$|c|'`; \
-	pyo_files_pep3147=`echo "$$py_files_pep3147" | sed 's|$$|o|'`; \
 	st=0; \
-	for files in \
-	  "$$py_files" \
-	  "$$pyc_files" \
-	  "$$pyo_files" \
-## Installation of '.py' files is not influenced by PEP-3147, so it
-## is correct *not* to have $pyfiles_pep3147 here.
-	  "$$pyc_files_pep3147" \
-	  "$$pyo_files_pep3147" \
-	; do \
+	for files in "$$py_files" "$$pyc_files" "$$pyo_files"; do \
 	  $(am__uninstall_files_from_dir) || st=$$?; \
 	done; \
+## This is somewhat tricky, because for newer pythons we have to take PEP-3147
+## into account.  Avoid exceeding the command-line length limit.
+	dir='$(DESTDIR)$(%NDIR%dir)/__pycache__'; \
+	echo "$$py_files" | $(am__pep3147_tweak) | $(am__base_list) | \
+	  while read files; do \
+	    $(am__uninstall_files_from_dir) || st=$$?; \
+	  done || exit $$?; \
 	exit $$st
 endif %?INSTALL%
 
-- 
2.16.1

-- 
Mathieu Lirzin
GPG: F2A3 8D7E EB2B 6640 5761  070D 0ADE E100 9460 4D37