Add optional portable information to subscription (#163)

CONTRIBUTING.md

@@ -405,7 +405,7 @@ something like
 import webviz_config
 
 @webviz_config.SHARED_SETTINGS_SUBSCRIPTIONS.subscribe("some_key")
-def subscribe(some_key, config_folder):
+def subscribe(some_key, config_folder, portable):
     # The input argument some_key given to this function is equal to
     # shared_settings["some_key"] provided by the user from the configuration file.
 
@@ -420,10 +420,11 @@ The (optionally transformed) `shared_settings` are accessible to containers thro
 the `app` instance (see [callbacks](#callbacks)). E.g., in this case the wanted settings
 are found as `app.webviz_settings["shared_settings"]["some_key"]`.
 
-Stating the second input argument `config_folder` in the function signature is not
-necessary, however if you do you will get a
+Stating the input arguments named `config_folder` and/or `portable` in the function
+signature is not necessary, however if you do you will get a
 [`pathlib.Path`](https://docs.python.org/3/library/pathlib.html#pathlib.Path)
-instance representing the absolute path to the configuration file that was used.
+instance representing the absolute path to the configuration file that was used, and/or
+a boolean value stating if the Webviz application running is a portable one.
 
 ### Custom ad-hoc containers
 

webviz_config/_shared_settings_subscriptions.py

@@ -25,7 +25,7 @@ def register(function):
 
         return register
 
-    def transformed_settings(self, shared_settings, config_folder):
+    def transformed_settings(self, shared_settings, config_folder, portable):
         """Called from the app template, which returns the `shared_settings`
         after all third-party package subscriptions have done their
         (optional) transfomrations.
@@ -34,11 +34,15 @@ def transformed_settings(self, shared_settings, config_folder):
 
         for subscription in self._subscriptions:
             key, function = subscription["key"], subscription["function"]
-            requires_config_folder = len(inspect.getfullargspec(function).args) > 1
-            shared_settings[key] = (
-                function(shared_settings.get(key), pathlib.Path(config_folder))
-                if requires_config_folder
-                else function(shared_settings.get(key))
+            shared_settings[key] = function(
+                *[
+                    pathlib.Path(config_folder)
+                    if arg == "config_folder"
+                    else portable
+                    if arg == "portable"
+                    else shared_settings.get(arg)
+                    for arg in inspect.getfullargspec(function).args
+                ]
             )
 
         return shared_settings

webviz_config/templates/copy_data_template.py.jinja2

@@ -25,7 +25,7 @@ app.config.suppress_callback_exceptions = True
 
 app.webviz_settings = {
     "shared_settings": webviz_config.SHARED_SETTINGS_SUBSCRIPTIONS.transformed_settings(
-        {{ shared_settings }}, {{ config_folder }}
+        {{ shared_settings }}, {{ config_folder }}, False
     ),
     "plotly_layout": {{ plotly_layout }},
 }

webviz_config/templates/webviz_template.py.jinja2

@@ -60,7 +60,7 @@ app.config.suppress_callback_exceptions = True
 
 app.webviz_settings = {
     "shared_settings": webviz_config.SHARED_SETTINGS_SUBSCRIPTIONS.transformed_settings(
-        {{ shared_settings }}, {{ config_folder }}
+        {{ shared_settings }}, {{ config_folder }}, {{ portable }}
     ),
     "portable": {{ portable }},
     "plotly_layout": {{ plotly_layout }},