Changes: - VIRTUALENV: virtualenv is explicitly executed through ${PYTHON}The current problems1) testgres/operations/helpers.py    # Prepared pointer on function to get a name of system codepage    _get_default_encoding_func = _make_get_default_encoding_func()must be    # Prepared pointer on function to get a name of system codepage    _get_default_encoding_func = _make_get_default_encoding_func.__func__()It is a problem of Python 3.92) These tests fail:FAILED tests/test_simple.py::TestgresTests::test_logical_replication - psycopg2.errors.ProtocolViolation: could not create replication slot "mysub": ERROR:  could not access file "pgoutput": No such file or directoryFAILED tests/test_simple.py::TestgresTests::test_logical_catchup - psycopg2.errors.ProtocolViolation: could not create replication slot "mysub": ERROR:  could not access file "pgoutput": No such file or directoryFAILED tests/test_simple_remote.py::TestgresRemoteTests::test_logical_replication - psycopg2.errors.ProtocolViolation: could not create replication slot "mysub": ERROR:  could not access file "pgoutput": No such file or directoryFAILED tests/test_simple_remote.py::TestgresRemoteTests::test_logical_catchup - psycopg2.errors.ProtocolViolation: could not create replication slot "mysub": ERROR:  could not access file "pgoutput": No such file or directoryI suggest to fix these problems in the separated commits.

…3.9]Python 3.9 does not undestand the following code:_get_default_encoding_func = _make_get_default_encoding_func()ERROR - TypeError: 'staticmethod' object is not callablehttps://app.travis-ci.com/github/postgrespro/testgres/jobs/631402370The code:_get_default_encoding_func = _make_get_default_encoding_func.__func__()is processed without problems.

…20250316_001--altlinux_10

This patch fixes a problem with run the following commands:"time <set env> converage run ..."This command does not work (on altlinux-10 with custom build of PG).I do not know why it happened and do not know why it was working early."<set env> time converage run ..." works without any problems.

We manually compile and "install" PG: - create a symlink /usr/local/bin/pg_config - create a symlink /usr/lib64/libpq.so.5Manual bild fixes the following problem:psycopg2.errors.ProtocolViolation: could not create replication slot "mysub": ERROR:  could not access file "pgoutput": No such file or directoryFailed tests: - TestTestgresCommon::test_logical_replication[remote_ops] - TestTestgresCommon::test_logical_catchup[local_ops] - TestTestgresCommon::test_logical_replication[local_ops] - TestTestgresCommon::test_logical_catchup[remote_ops]

time is installed manually.It fixes the following problem:++ pg_config --bindir+ PG_BIN=/usr/lib/postgresql/17/bin+ time coverage run -a -m pytest -l -v -n 4 -k ''./run_tests.sh: line 49: time: command not found

Alplinux does in creates /usr/bin/virtualenv but creates /usr/bin/virtualenv3.Let's create the symlink /usr/bin/virtualenv -> /usr/bin/virtualenv3 and restore an usage of virtualenv in run_tests.sh.

Python environment initialization has been simplified.

AltLinux 10 does not support the sequential "time <set_env> coverage run ...".Because this OS does not has a builtin command 'time' in bash.https://forum.altlinux.org/index.php?topic=48342.0We will install 'time' manually and use another command "<set_env> time coverage run ..." that works without problems but it requires to install 'time' on Ubuntu 2024.04, too.AlpineLinux processes a new command line without any problems.

Let's avoid creating useless environment variables.

…0250316_001--altlinux_10

We exclude "remote" tests until a problem with slow SSH connection has been resolved.

Installation of mc is deleted.