Add tljh_post_install hook

tljh/hooks.py

@@ -58,4 +58,14 @@ def tljh_config_post_install(config):
     be the serialized contents of config, so try to not
     overwrite anything the user might have explicitly set.
     """
+    pass
+
+@hookspec
+def tljh_post_install():
+    """
+    Post install script to be executed after installation
+    and after all the other hooks.
+
+    This can be arbitrary Python code.
+    """
     pass

tljh/installer.py

@@ -405,6 +405,9 @@ def run_plugin_actions(plugin_manager, plugins):
         ))
         conda.ensure_pip_packages(USER_ENV_PREFIX, user_pip_packages)
 
+    # Custom post install actions
+    hook.tljh_post_install()
+
 
 def ensure_config_yaml(plugin_manager):
     """