Use python3 as default python command
After Python 2 is getting unsupported, new distros
like CentOS 8 and RHEL8 have stopped providing 'python'
package forcing user to decide which alternative to
use by installing 'python2' or 'python3.x' package
and then setting python alternative.
This change is intended to make using python3 command as
much as possible and use it as default 'python' alternative
where needed.
The final goals motivating this change are:
- stop using python2 as much as possible
- help adding support for CentOS 8 and RHEL8
Change-Id: I1e90db987c0bfa6206c211e066be03ea8738ad3f
diff --git a/inc/python b/inc/python
index cf61389..52ad565 100644
--- a/inc/python
+++ b/inc/python
@@ -450,6 +450,31 @@
fi
}
+# Provide requested python version and sets PYTHON variable
+function install_python {
+ # NOTE: install_python function should finally just do what install_python3
+ # does as soon Python 2 support has been dropped
+ if python3_enabled; then
+ install_python3
+ export PYTHON=$(which python${PYTHON3_VERSION} 2>/dev/null ||
+ which python3 2>/dev/null)
+ if [[ "${DISTRO}" =~ (rhel8) ]]; then
+ # Use Python 3 as default python command so that we have only one
+ # python alternative to use on the system for either python and
+ # python3
+ sudo alternatives --set python "${PYTHON}"
+ else
+ # Install anyway Python 2 for legacy scripts that still requires
+ # python instead of python3 command
+ install_package python
+ fi
+ else
+ echo "WARNING - Python 2 support has been deprecated in favor of Python 3"
+ install_package python
+ export PYTHON=$(which python 2>/dev/null)
+ fi
+}
+
# Install python3 packages
function install_python3 {
if is_ubuntu; then