# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1712683532 -7200
# Node ID d0e2b0101bfc5a9fbe314969943c94c6ccbc5b3e
# Parent  107c5af631a7766695e004cf85f9338d758944bb
ci: limit maximum number of open file on python2

On the clever cloud runner, the number of maximum open files is 1 073 741 816.
Since python 2 implementation of `subprocess.Popen(…, close_fds=True)` is quite
stupid¹, this becomes a significant problem there. Spawning a subprocess with
`close_fds=True` take 9 minutes (nine!). Since each test runs in a subprocess,
this makes running the test suite with Python 2 on the Clever Cloud runner
impossible.

To fix this, we simply limit the maximum number of open file descriptors when
running with Python2.

[1] https://bugs.python.org/issue35757

diff -r 107c5af631a7 -r d0e2b0101bfc .gitlab-ci.yml
--- a/.gitlab-ci.yml	Fri Mar 29 15:02:02 2024 -0300
+++ b/.gitlab-ci.yml	Tue Apr 09 19:25:32 2024 +0200
@@ -27,8 +27,8 @@
         - (cd tests; ls -1 test-check-*.t > /tmp/check-tests.txt)
     script:
         - *prepare_hg
-        - ("$PYTHON" --version)
-        - (cd tests; set -x; HGMODULEPOLICY="$TEST_HGMODULEPOLICY" "$PYTHON" /ci/repos/mercurial/tests/run-tests.py --color=always $RUNTEST_ARGS)
+        - ($PYTHON --version)
+        - (cd tests; set -x; HGMODULEPOLICY="$TEST_HGMODULEPOLICY" $PYTHON /ci/repos/mercurial/tests/run-tests.py --color=always $RUNTEST_ARGS)
 
 checks-py3:
     <<: *runtests
@@ -51,7 +51,7 @@
     <<: *runtests
     variables:
         PY: py2
-        PYTHON: python2
+        PYTHON: prlimit --nofile=1024:1024 python2
         RUNTEST_ARGS: "--no-rust --blacklist /tmp/check-tests.txt"
         TEST_HGMODULEPOLICY: "c"
         HG_BRANCH: 'max(tag("re:^6\.1"))'