fix(libtofs): avoid using subpath by default

* Only the `systemd-formula` uses these, so avoid for all other formulas

docs/TOFS_pattern.rst

@@ -493,7 +493,8 @@ For example, the following ``formula.component.config`` SLS:
        - mode: 644
        - template: jinja
        - source: {{ files_switch(['formula.conf'],
-                                 lookup='formula'
+                                 lookup='formula',
+                                 use_subpath=True
                     )
                  }}
 

template/libtofs.jinja

@@ -2,7 +2,8 @@
                        lookup=None,
                        default_files_switch=['id', 'os_family'],
                        indent_width=6,
-                       v1_path_prefix='') %}
+                       v1_path_prefix='',
+                       use_subpath=False) %}
   {#-
     Returns a valid value for the "source" parameter of a "file.managed"
     state function. This makes easier the usage of the Template Override and
@@ -19,6 +20,8 @@
       * indent_witdh: indentation of the result value to conform to YAML
       * v1_path_prefix: (deprecated) only used for injecting a path prefix into
         the source, to support older TOFS configs
+      * use_subpath: defaults to `False` but if set, lookup the source file
+        recursively from the current state directory up to `tplroot`
 
     Example (based on a `tplroot` of `xxx`):
 
@@ -66,7 +69,7 @@
   {%- set path_prefix_exts = [''] %}
   {%- if v1_path_prefix != '' %}
     {%- do path_prefix_exts.append(v1_path_prefix) %}
-  {%- elif tplroot != tpldir %}
+  {%- elif use_subpath and tplroot != tpldir %}
     {#- Walk directory tree to find {{ files_dir }} #}
     {%- set subpath_parts = tpldir.lstrip(tplroot).lstrip('/').split('/') %}
     {%- for path in subpath_parts %}

template/subcomponent/config/file.sls

@@ -14,7 +14,8 @@ template-subcomponent-config-file-file-managed:
   file.managed:
     - name: {{ template.subcomponent.config }}
     - source: {{ files_switch(['subcomponent-example.tmpl'],
-                              lookup='template-subcomponent-config-file-file-managed'
+                              lookup='template-subcomponent-config-file-file-managed',
+                              use_subpath=True
                  )
               }}
     - mode: 644