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Commit19252e8

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plpython: Reject Python 2 during build configuration.
Python 2.7 went EOL 2020-01-01 and the support for Python 2 requires a fairbit of infrastructure. Therefore we are removing Python 2 support in plpython.This patch just rejects Python 2 during configure / mkvcbuild.pl. Futurecommits will remove the code and infrastructure for Python 2 support andadjust more of the documentation. This way we can see the buildfarm stateafter the removal sooner and we can be sure that failures are due todesupporting Python 2, rather than caused by infrastructure cleanup.Reviewed-By: Peter Eisentraut <peter@eisentraut.org>Discussion:https://postgr.es/m/20211031184548.g4sxfe47n2kyi55r@alap3.anarazel.de
1 parent8f388f6 commit19252e8

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-20
lines changed

5 files changed

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‎config/python.m4

Lines changed: 6 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -9,14 +9,17 @@
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# Look for Python and set the output variable 'PYTHON' if found,
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# fail otherwise.
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#
12+
# Since we are supporting only Python 3.x, prefer python3 to plain python. If
13+
# the latter exists at all, it very possibly points to python2.
14+
1215
# As the Python 3 transition happens and PEP 394 isn't updated, we
1316
# need to cater to systems that don't have unversioned "python" by
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# default. Some systems ship with "python3" by default and perhaps
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# have "python" in an optional package. Some systems only have
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# "python2" and "python3", in which case it's reasonable to prefer the
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# newer version.
1821
AC_DEFUN([PGAC_PATH_PYTHON],
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[PGAC_PATH_PROGS(PYTHON,[pythonpython3python2])
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[PGAC_PATH_PROGS(PYTHON,[python3python])
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AC_ARG_VAR(PYTHON,[Python program])dnl
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if test x"$PYTHON" = x""; then
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AC_MSG_ERROR([Python not found])
@@ -37,8 +40,8 @@ python_majorversion=`echo "$python_fullversion" | sed '[s/^\([0-9]*\).*/\1/]'`
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python_minorversion=`echo "$python_fullversion" | sed '[s/^[0-9]*\.\([0-9]*\).*/\1/]'`
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python_version=`echo "$python_fullversion" | sed '[s/^\([0-9]*\.[0-9]*\).*/\1/]'`
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# Reject unsupported Python versions as soon as practical.
40-
if test "$python_majorversion" -lt 3 -a "$python_minorversion" -lt 7; then
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AC_MSG_ERROR([Python version $python_version is too old (version2.7 or later is required)])
43+
if test "$python_majorversion" -lt 3; then
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AC_MSG_ERROR([Python version $python_version is too old (version3 or later is required)])
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fi
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AC_MSG_CHECKING([for Python sysconfig module])

‎configure

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -10280,7 +10280,7 @@ fi
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if test "$with_python" = yes; then
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if test -z "$PYTHON"; then
10283-
for ac_prog inpythonpython3python2
10283+
for ac_prog in python3python
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do
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# Extract the first word of "$ac_prog", so it can be a program name with args.
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set dummy $ac_prog; ac_word=$2
@@ -10346,8 +10346,8 @@ python_majorversion=`echo "$python_fullversion" | sed 's/^\([0-9]*\).*/\1/'`
1034610346
python_minorversion=`echo "$python_fullversion" | sed 's/^[0-9]*\.\([0-9]*\).*/\1/'`
1034710347
python_version=`echo "$python_fullversion" | sed 's/^\([0-9]*\.[0-9]*\).*/\1/'`
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# Reject unsupported Python versions as soon as practical.
10349-
if test "$python_majorversion" -lt 3 -a "$python_minorversion" -lt 7; then
10350-
as_fn_error $? "Python version $python_version is too old (version2.7 or later is required)" "$LINENO" 5
10349+
if test "$python_majorversion" -lt 3; then
10350+
as_fn_error $? "Python version $python_version is too old (version3 or later is required)" "$LINENO" 5
1035110351
fi
1035210352

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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for Python sysconfig module" >&5

‎doc/src/sgml/install-windows.sgml

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -136,7 +136,7 @@
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to specify the location of your <productname>Python</productname> installation,
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put the following in <filename>config.pl</filename>:
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<programlisting>
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$config->{python} = 'c:\python26';
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$config->{python} = 'c:\python310';
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</programlisting>
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You only need to specify those parameters that are different from what's in
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<filename>config_default.pl</filename>.

‎doc/src/sgml/installation.sgml

Lines changed: 5 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -196,11 +196,7 @@ su - postgres
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language, you need a <productname>Python</productname>
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installation with the header files and
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the <application>sysconfig</application> module. The minimum
199-
required version is <productname>Python</productname> 2.7.
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<productname>Python 3</productname> is supported if it's
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version 3.2 or later; but see
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<xref linkend="plpython-python23"/>
203-
when using Python 3.
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required version is <productname>Python</productname> 3.2.
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</para>
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<para>
@@ -1868,14 +1864,10 @@ build-postgresql:
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<term><envar>PYTHON</envar></term>
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<listitem>
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<para>
1871-
Python interpreter program. This will be used to
1872-
determine the dependencies for building PL/Python. Also,
1873-
whether Python 2 or 3 is specified here (or otherwise
1874-
implicitly chosen) determines which variant of the PL/Python
1875-
language becomes available. See
1876-
<xref linkend="plpython-python23"/>
1877-
for more information. If this is not set, the following are probed
1878-
in this order: <literal>python python3 python2</literal>.
1867+
Python interpreter program. This will be used to determine the
1868+
dependencies for building PL/Python. If this is not set, the
1869+
following are probed in this order:
1870+
<literal>python3 python</literal>.
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</para>
18801872
</listitem>
18811873
</varlistentry>

‎src/tools/msvc/Mkvcbuild.pm

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -490,6 +490,10 @@ sub mkvcbuild
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if (!(defined($pyprefix) &&defined($pyver)));
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492492
my$pymajorver =substr($pyver, 0, 1);
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494+
die"Python version$pyver is too old (version 3 or later is required)"
495+
ifint($pymajorver) < 3;
496+
493497
my$plpython =$solution->AddProject('plpython' .$pymajorver,
494498
'dll','PLs','src/pl/plpython');
495499
$plpython->AddIncludeDir($pyprefix .'/include');

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