Relocate python3.8 out of PATH, add script to fix shebangs

python38-shebang-sanity.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+set -efu
+
+find "$RPM_BUILD_ROOT" -type f -print | while read -r line ; do
+  if file "$line" | grep -q ELF ; then continue ; fi
+  if head -n 1 "$line" | grep -qE '([[:blank:]])*#([[:blank:]])*\!([[:blank:]])*.*python3' ; then
+    sed -i -e '1s,python3,python3.8,g' -e '1s,python3.8.8,python3.8,g' "$line"
+    sed -E -i "$line" \
+      -e '1s,([[:blank:]])*#([[:blank:]])*\!([[:blank:]])*/usr/bin/env([[:blank:]])*python3.8,#!/usr/libexec/python3.8,g' \
+      -e '1s,([[:blank:]])*#([[:blank:]])*\!([[:blank:]])*/usr/bin/python3.8,#!/usr/libexec/python3.8,g'
+  fi
+done 

python38.macros

@@ -1,4 +1,5 @@
-%__python38 /usr/bin/python3.8
+%__python38 /usr/libexec/python3.8
+
 %python38_sitelib %(%{__python38} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
 %python38_sitearch %(%{__python38} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1))")
 %python38_version %(%{__python38} -c "import sys; print(sys.version[0:3])")
@@ -23,3 +24,6 @@ CFLAGS="%{optflags}" %{__python38} %{py_setup} %{?py_setup_args} install -O1 --s
 %py38_test() %{expand:\
 %{__python38} %{py_setup} %{?py_setup_args} test %{?1}\
 }
+
+%py38_shebang_sanity %{_bindir}/python38-shebang-sanity
+%py38_ss %py38_shebang_sanity

python38.spec

@@ -31,6 +31,9 @@
 %define sub_ver %{familyver}
 %endif
 
+# one dir for rpm4/5
+%global _libexecdir /usr/libexec
+
 ###########################################
 
 # We want to byte-compile the .py files within the packages using the new
@@ -51,7 +54,7 @@
 Summary:        An interpreted, interactive object-oriented programming language
 Name:           %{py3_name}
 Version:        3.8.2
-Release:        4
+Release:        5
 License:        Modified CNRI Open Source License
 Group:          Development/Python
 
@@ -59,6 +62,7 @@ Source0:         https://www.python.org/ftp/python/%{version}/Python-%{version}.
 Source1:        https://docs.python.org/3/archives/python-%{docver}-docs-html.tar.bz2
 Source2:        python38.macros
 Source3:        pybytecompile.macros
+Source4:        python38-shebang-sanity.sh
 Source100:      python38.rpmlintrc
 
 # 00001 #
@@ -406,10 +410,20 @@ ln -s python3-config %{buildroot}%{_bindir}/python-config
 # See https://github.com/fedora-python/python-rpm-porting/issues/24
 cp -p Tools/scripts/pathfix.py %{buildroot}%{_bindir}/
 
-%if %{with py38} 
+%if %{with py38}
+
+install -m0755 %{SOURCE4} %{buildroot}%{_bindir}/python38-shebang-sanity
+
 mv %{buildroot}%{_bindir}/pynche3 \
  %{buildroot}%{_bindir}/pynche%{sub_ver}
 
+# Build scripts of many packages try to use the highest version of Python that they find
+# That is why we have to relocate python3.8 out of $PATH
+mkdir -p %{buildroot}%{_libexecdir}
+mv %{buildroot}%{_bindir}/python3.8 %{buildroot}%{_libexecdir}/python3.8
+# Temporary compat symlink untill all packages are fixed
+( cd %{buildroot}%{_bindir} ; ln -s ../libexec/python3.8 python3.8 )
+
 # Remove shebang lines from .py files that aren't executable, and
 # remove executability from .py files that don't have a shebang line:
 find %{buildroot} -name \*.py \
@@ -419,13 +433,7 @@ find %{buildroot} -name \*.py \
   -exec chmod a-x {} \; \) \)
 
 ########## shebang py3 > py3.8 ##################
-
-find %{buildroot} -type f -print | while read -r line ; do
-  if file "$line" | grep -q ELF ; then continue ; fi
-  if head -n 1 "$line" | grep -v python3.8 | grep -q python3 ; then
-    sed -i -e '1s,python3,python3.8,g' "$line"
-  fi
-done
+sh %{SOURCE4}
 
 # When packaging a not system version of Python, these files are named like e.g. 2to3-3.8
 # These files must not be packaged to avoid conflicts with system python3
@@ -515,6 +523,9 @@ export TMP="/tmp" TMPDIR="/tmp"
 %if %{with valgrind}
 %{_libdir}/valgrind/valgrind-python3.supp
 %endif
+%if %{with py38}
+%{_libexecdir}/python3*
+%endif
 
 %files -n %{lib_name}
 %{_libdir}/libpython*.so.1*