overlay profiles: Ease into Python bump with transitional profile

We only allow one version of Python in the SDK and generic images, but
this creates a friction during the SDK build where the seed still has
an old version of Python and the stage1 is supposed to have the new
one, and thus we end up with slot conflicts for python packages - I
don't really understand what is going on (there are python packages in
the seed image that are built for old Python and emerge wants to
install the same packages in the seed but built for the new Python and
it can't work its way around it.)

Allowing both versions of Python to coexist in stage1 seems to be
moving things forward. Stage3 image (stage2 is skipped) will contain
only the new version of Python.

Signed-off-by: Krzesimir Nowak <knowak@microsoft.com>

Author: krnowak

sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/make.defaults

@@ -10,13 +10,13 @@ USE_EXPAND="${USE_EXPAND} GO_VERSION"
 
 USE="${USE} -cracklib -cups -tcpd -berkdb"
 
-# Use Python 3.12 as the default version, allow python 3.11 for a transition.
+# Use Python 3.12 as the default version.
 PYTHON_SINGLE_TARGET="-pypy3_11 -python3_11 python3_12 -python3_13 -python3_14 -python3_13t -python3_14t"
-PYTHON_TARGETS="-pypy3_11 python3_11 python3_12 -python3_13 -python3_14 -python3_13t -python3_14t"
+PYTHON_TARGETS="-pypy3_11 -python3_11 python3_12 -python3_13 -python3_14 -python3_13t -python3_14t"
 
 # Same as above, but for bootstrapping.
 BOOTSTRAP_USE="${BOOTSTRAP_USE} -python_single_target_pypy3_11 -python_single_target_python3_11 python_single_target_python3_12 -python_single_target_python3_13 -python_single_target_python3_14  -python_single_target_python3_13t -python_single_target_python3_14t"
-BOOTSTRAP_USE="${BOOTSTRAP_USE} -python_targets_pypy3_11 python_targets_python3_11 python_targets_python3_12 -python_targets_python3_13 -python_targets_python3_14 -python_targets_python3_13t -python_targets_python3_14t"
+BOOTSTRAP_USE="${BOOTSTRAP_USE} -python_targets_pypy3_11 -python_targets_python3_11 python_targets_python3_12 -python_targets_python3_13 -python_targets_python3_14 -python_targets_python3_13t -python_targets_python3_14t"
 
 
 # Never install cron or cron jobs

sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.mask

@@ -17,5 +17,5 @@
 # Do not install python versions that were "disabled" in
 # PYTHON_TARGETS. For some reason emerge still insists on installing
 # those as a dependency for some packages.
-<dev-lang/python-3.11
+<dev-lang/python-3.12
 >=dev-lang/python-3.13

sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/make.defaults

@@ -3,10 +3,6 @@
 
 FLATCAR_TYPE=generic
 
-# Use Python 3.12 as the default version.
-PYTHON_SINGLE_TARGET="-pypy3_11 -python3_11 python3_12 -python3_13 -python3_14 -python3_13t -python3_14t"
-PYTHON_TARGETS="-pypy3_11 -python3_11 python3_12 -python3_13 -python3_14 -python3_13t -python3_14t"
-
 USE="acpi usb cryptsetup policykit"
 USE="${USE} -cros_host -expat -cairo -X -man"
 USE="${USE} -acl -gpm -python"

sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/generic/package.mask

@@ -0,0 +1,9 @@
+# Override python settings
+
+# Use Python 3.12 as the default version, allow python 3.11 for a transition.
+PYTHON_SINGLE_TARGET="-pypy3_11 -python3_11 python3_12 -python3_13 -python3_14 -python3_13t -python3_14t"
+PYTHON_TARGETS="-pypy3_11 python3_11 python3_12 -python3_13 -python3_14 -python3_13t -python3_14t"
+
+# Same as above, but for bootstrapping.
+BOOTSTRAP_USE="${BOOTSTRAP_USE} -python_single_target_pypy3_11 -python_single_target_python3_11 python_single_target_python3_12 -python_single_target_python3_13 -python_single_target_python3_14  -python_single_target_python3_13t -python_single_target_python3_14t"
+BOOTSTRAP_USE="${BOOTSTRAP_USE} -python_targets_pypy3_11 python_targets_python3_11 python_targets_python3_12 -python_targets_python3_13 -python_targets_python3_14 -python_targets_python3_13t -python_targets_python3_14t"

sdk_container/src/third_party/coreos-overlay/profiles/coreos/targets/sdk/transition/make.defaults

@@ -0,0 +1 @@
+=dev-lang/python-3.11*