refactor(salt-master): provide backward compatible states

This permit to not break user states which depends on this one.

salt/master/init.sls

@@ -1,7 +1,54 @@
 # -*- coding: utf-8 -*-
 # vim: ft=sls
 
+{#- Get the `tplroot` from `tpldir` #}
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- from tplroot ~ "/map.jinja" import salt_settings with context %}
+
 include:
   - .package
   - .config
   - .service
+
+{#- Be backward compatible #}
+{%- if grains.kernel != 'Windows' %}
+{%-   if grains.os == "MacOS" %}
+salt-master-macos:
+  test.show_notification:
+    - name: salt-master-macos
+    - text: Backward compatible state for {{
+      "'sls:" ~ tplroot ~ ".master.config.files => "
+      ~ "salt-master-config-files-macos-LaunchDaemons-file.managed'"
+      }}
+{%-   endif %}
+
+{%- set old_states_names = [
+      "'sls:" ~ tplroot ~ ".master.package.install => "
+      ~ "salt-master-package-install-pkg.installed'",
+      "'sls:" ~ tplroot ~ ".master.config.files => "
+      ~ "salt-master-config-files-file.recurse'",
+      "'sls:" ~ tplroot ~ ".master.service",
+    ] %}
+salt-master:
+  test.show_notification:
+    - name: salt-master
+    - text: Backward compatible state for {{ old_states_names | join(", ") }}
+
+{%-   if salt_settings.master_remove_config %}
+remove-default-master-conf-file:
+  test.show_notification:
+    - name: remove-default-master-conf-file
+    - text: Backward compatible state for {{
+      "'sls:" ~ tplroot ~ ".master.config.files => "
+      ~ "salt-master-config-files-remove-old-master-conf-file.absent'"
+      }}
+{%-   endif %}
+
+remove-old-master-conf-file:
+  test.show_notification:
+    - name: remove-old-master-conf-file
+    - text: Backward compatible state for {{
+      "'sls:" ~ tplroot ~ ".master.config.files => "
+      ~ "salt-master-config-files-remove-old-default-master-conf-file.absent'"
+      }}
+{%- endif %}