bug#30556: [PATCH] Python tests should run with multiple python versions

[Karl Berry]

Mathieu and all - back on this report from 2018:
https://bugs.gnu.org/30556.

Mike (Frysinger) and Bogdan both made various patches that together
have, I think, fixed all these issues. Thanks x 2 :).

Here is the patch from Bogdan that I've just pushed to finish it.
Closing, with fingers crossed. --karl

2023-07-06  Bogdan  <bogdro_rep@gmx.us>

python: generalize tests.

This change finishes fixing https://bugs.gnu.org/30556.

* t/python-prefix.sh: use $PYTHON if set, not hardwiring "python".
* t/python-virtualenv.sh (get-pyexecdir): new make target;
use it instead of hardwiring $py_site.
diff --git a/t/python-prefix.sh b/t/python-prefix.sh
index df15e4300..766f47258 100644
--- a/t/python-prefix.sh
+++ b/t/python-prefix.sh
@@ -43,7 +43,12 @@ echo-python-exec-prefix:
        @echo $(PYTHON_EXEC_PREFIX)
 END

-py_version=$(python -c 'import sys; print("%u.%u" % sys.version_info[:2])')
+if test -z "$PYTHON"; then
+  py_exec=python
+else
+  py_exec=$PYTHON
+fi
+py_version=$("$py_exec" -c 'import sys; print("%u.%u" % sys.version_info[:2])')
 py_inst_site=inst/lib/python$py_version/site-packages
 py_instexec_site=instexec/lib/python$py_version/site-packages

diff --git a/t/python-virtualenv.sh b/t/python-virtualenv.sh
index ae5d96ad6..b06964b90 100644
--- a/t/python-virtualenv.sh
+++ b/t/python-virtualenv.sh
@@ -100,6 +100,8 @@ test-run:
        python -c 'from am_foo import foo_func; assert (foo_func () == 12345)'
        python -c 'from am_virtenv import old_am; assert (old_am () == 
"AutoMake")'
 all-local: debug
+get-pyexecdir:
+       @echo $(pyexecdir)
x END

 cat > am_foo.py << 'END'
@@ -127,8 +129,8 @@ check_install ()
   py_installed "$py_site"/am_foo.pyc
   py_installed "$py_site"/am_virtenv/__init__.py
   py_installed "$py_site"/am_virtenv/__init__.pyc
-  test -f      "$py_site"/libquux.a
-  test -f      "$py_site"/am_virtenv/libzardoz.a
+  test -f      "$($MAKE get-pyexecdir ${1+"$@"})"/libquux.a
+  test -f      "$($MAKE get-pyexecdir ${1+"$@"})"/am_virtenv/libzardoz.a
 }

 check_uninstall ()
@@ -139,8 +141,8 @@ check_uninstall ()
   py_installed --not "$py_site"/am_foo.pyc
   test ! -e          "$py_site"/am_virtenv/__init__.py
   py_installed --not "$py_site"/am_virtenv/__init__.pyc
-  test ! -e          "$py_site"/libquux.a
-  test ! -e          "$py_site"/am_virtenv/libzardoz.a
+  test ! -e          "$($MAKE get-pyexecdir ${1+"$@"})"/libquux.a
+  test ! -e          "$($MAKE get-pyexecdir ${1+"$@"})"/am_virtenv/libzardoz.a
 }

 $ACLOCAL

compile finished at Thu Jul  6 18:27:36 2023