refactor(mapping): simplify py version handling

salt/defaults.yaml

 ---
 salt:
   version: ''
+  py_ver: ''   ## py2 is default
   rootuser: root
   rootgroup: root
   install_packages: true

salt/osfamilymap.yaml

 # vim: ft=yaml
 ---
 
-{%- import_yaml "salt/ospyvermap.yaml" as ospyvermap %}
-{%- set ospyver = salt['grains.filter_by'](ospyvermap, grain='os_family') or {} %}
-{%- set py_ver_repr = salt['pillar.filter_by'](ospyver, pillar='salt:py_ver', default='py2') %}
+{%- set py_ver_repr = salt['pillar.get']('salt:py_ver', '') %}
 
 {%- set osrelease = salt['grains.get']('osrelease') %}
 {#- Workaround for OpenSuse Leap 15.1 until the repo is available #}
 {%- endif %}
 
 Debian:
-  pkgrepo: 'deb http://repo.saltstack.com/{{ py_ver_repr }}/{{ osfamily_lower }}/{{ osmajorrelease }}/amd64/{{ salt_release }} {{ oscodename }} main'
-  key_url: 'https://repo.saltstack.com/{{ py_ver_repr }}/{{ osfamily_lower }}/{{ osmajorrelease }}/amd64/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
+  pkgrepo: 'deb http://repo.saltstack.com/{{ py_ver_repr or 'apt' }}/{{ osfamily_lower }}/{{ osmajorrelease }}/amd64/{{ salt_release }} {{ oscodename }} main'
+  key_url: 'https://repo.saltstack.com/{{ py_ver_repr or 'apt' }}/{{ osfamily_lower }}/{{ osmajorrelease }}/amd64/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
   libgit2: libgit2-22
   pyinotify: python-pyinotify
   gitfs:
 RedHat:
   pkgrepo_name: saltstack
   pkgrepo_humanname: SaltStack repo for RHEL/CentOS $releasever
-  pkgrepo: 'https://repo.saltstack.com/{{ py_ver_repr }}/redhat/$releasever/$basearch/{{ salt_release }}'
-  key_url: 'https://repo.saltstack.com/{{ py_ver_repr }}/redhat/$releasever/$basearch/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
+  pkgrepo: 'https://repo.saltstack.com/{{ py_ver_repr or 'yum' }}/redhat/$releasever/$basearch/{{ salt_release }}'
+  key_url: 'https://repo.saltstack.com/{{ py_ver_repr or 'yum' }}/redhat/$releasever/$basearch/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
   pygit2: python-pygit2
   python_git: GitPython
   gitfs:
 
 FreeBSD:
   rootgroup: wheel
-  salt_master: py27-salt
-  salt_minion: py27-salt
-  salt_syndic: py27-salt
-  salt_cloud: py27-salt
-  salt_api: py27-salt
-  salt_ssh: py27-salt
-  python_git: py27-GitPython
-  pygit2: py27-pygit2
+  salt_master: {{ py_ver_repr or 'py27' }}-salt
+  salt_minion: {{ py_ver_repr or 'py27' }}-salt
+  salt_syndic: {{ py_ver_repr or 'py27' }}-salt
+  salt_cloud: {{ py_ver_repr or 'py27' }}-salt
+  salt_api: {{ py_ver_repr or 'py27' }}-salt
+  salt_ssh: {{ py_ver_repr or 'py27' }}-salt
+  python_git: {{ py_ver_repr or 'py27' }}-GitPython
+  pygit2: {{ py_ver_repr or 'py27' }}-pygit2
   config_path: /usr/local/etc/salt
   minion_service: salt_minion
   master_service: salt_master
   python_git: py-GitPython
 
 Windows:
-  salt_minion: salt-minion{{ py_ver_repr }}
+  salt_minion: salt-minion{{ py_ver_repr or '-py3' }}
   config_path: 'C:\salt\conf'
   minion_service: salt-minion
 

salt/osmap.yaml

 # vim: ft=yaml
 ---
 
-{% import_yaml "salt/ospyvermap.yaml" as ospyvermap %}
-{% set ospyver = salt['grains.filter_by'](ospyvermap, grain='os_family') or {} %}
-{% set py_ver_dir = salt['pillar.filter_by'](ospyver, pillar='salt:py_ver', default='py2') %}
+{%- set py_ver_dir = salt['pillar.get']('salt:py_ver', '') %}
 
 {% set osrelease = salt['grains.get']('osrelease') %}
 {% set salt_release = salt['pillar.get']('salt:release', 'latest') %}
 Amazon:
   pkgrepo_name: saltstack-amzn-repo
   pkgrepo_humanname: SaltStack repo for Amazon Linux 2
-  pkgrepo: 'https://repo.saltstack.com/yum/amazon/2/$basearch/{{ salt_release }}'
-  key_url: 'https://repo.saltstack.com/yum/amazon/2/$basearch/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
+  pkgrepo: 'https://repo.saltstack.com/{{ py_ver_dir or 'yum' }}/amazon/2/$basearch/{{ salt_release }}'
+  key_url: 'https://repo.saltstack.com/{{ py_ver_dir or 'yum' }}/amazon/2/$basearch/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
 
 Ubuntu:
-  pkgrepo: 'deb http://repo.saltstack.com/{{ py_ver_dir }}/{{ os_lower }}/{{ osrelease }}/amd64/{{ salt_release }} {{ oscodename }} main'
-  key_url: 'https://repo.saltstack.com/{{ py_ver_dir }}/{{ os_lower }}/{{ osrelease }}/amd64/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
+  pkgrepo: 'deb http://repo.saltstack.com/{{ py_ver_dir or 'apt' }}/{{ os_lower }}/{{ osrelease }}/amd64/{{ salt_release }} {{ oscodename }} main'
+  key_url: 'https://repo.saltstack.com/{{ py_ver_dir or 'apt' }}/{{ os_lower }}/{{ osrelease }}/amd64/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
   pygit2: python-pygit2
   gitfs:
     pygit2:
         install_from_package: Null
 
 Raspbian:
-  pkgrepo: 'deb http://repo.saltstack.com/{{ py_ver_dir }}/{{ os_family_lower }}/{{ osmajorrelease }}/armhf/{{ salt_release }} {{ oscodename }} main'
-  key_url: 'https://repo.saltstack.com/{{ py_ver_dir }}/{{ os_family_lower }}/{{ osmajorrelease }}/armhf/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
+  pkgrepo: 'deb http://repo.saltstack.com/{{ py_ver_dir or 'apt' }}/{{ os_family_lower }}/{{ osmajorrelease }}/armhf/{{ salt_release }} {{ oscodename }} main'
+  key_url: 'https://repo.saltstack.com/{{ py_ver_dir or 'apt' }}/{{ os_family_lower }}/{{ osmajorrelease }}/armhf/{{ salt_release }}/SALTSTACK-GPG-KEY.pub'
 
 SmartOS:
   salt_master: salt
   minion_service: 'salt:minion'
   master_service: 'salt:master'
   api_service: 'salt:api'
-  python_dulwich: 'py27-dulwich'
+  python_dulwich: {{ py_ver_dir or 'py27' }}{{ '-dulwich' }}
   gitfs:
     dulwich:
       install_from_source: false

salt/ospyvermap.yaml

-# -*- coding: utf-8 -*-
-# vim: ft=yaml
----
-Debian:
-  py2: 'apt'
-  py3: 'py3'
-
-RedHat:
-  py2: 'yum'
-  py3: 'py3'
-
-Suse: {}
-
-Gentoo: {}
-
-Arch: {}
-
-Alpine: {}
-
-FreeBSD: {}
-
-OpenBSD: {}
-
-# This is *not* used directly with https://repo.saltstack.com
-# Rather, this is used with `salt-winrepo-ng`, where the package names are:
-# * py2: salt-minion
-# * py3: salt-minion-py3
-Windows:
-  py2: ''
-  py3: '-py3'
-
-MacOS:
-  py2: 'py2'
-  py3: 'py3'

test/salt/pillar/v201707-py2.sls

 ---
 salt:
   release: '2017.7'
-  py_ver: 'py2'

test/salt/pillar/v201803-py2.sls

 ---
 salt:
   release: '2018.3'
-  py_ver: 'py2'

test/salt/pillar/v201902-py2.sls

 ---
 salt:
   release: '2019.2'
-  py_ver: 'py2'