Deploy time triggers (#2133)

* trigger_on_finish sorta works

* trigger deco works for event

* trigger events changes

* run black

* ok this one ran black

* black ran for real

* deleting some things i missed

* add format_deploytime_value() to both decos

* fixes error with types

* ran black

* fixes failing cases

* remove json.loads and add tuple to param type

* ran black

* function within parameter

* Delete local config file

* fixing borked cases

* refactor code

* shouldn't be changes to flowspec.py

* fixing bugs

* add deploy time trigger inits to argo parameter handling (#2146)

* run black

* undo modifications to to_pod

* reset util file

* pr comment

* remove print

---------

Co-authored-by: kayla seeley <[email protected]>
Co-authored-by: Sakari Ikonen <[email protected]>

metaflow/parameters.py

@@ -151,22 +151,28 @@ def __call__(self, deploy_time=False):
             return self._check_type(val, deploy_time)
 
     def _check_type(self, val, deploy_time):
+
         # it is easy to introduce a deploy-time function that accidentally
         # returns a value whose type is not compatible with what is defined
         # in Parameter. Let's catch those mistakes early here, instead of
         # showing a cryptic stack trace later.
 
         # note: this doesn't work with long in Python2 or types defined as
         # click types, e.g. click.INT
-        TYPES = {bool: "bool", int: "int", float: "float", list: "list"}
+        TYPES = {bool: "bool", int: "int", float: "float", list: "list", dict: "dict"}
 
         msg = (
             "The value returned by the deploy-time function for "
             "the parameter *%s* field *%s* has a wrong type. "
             % (self.parameter_name, self.field)
         )
 
-        if self.parameter_type in TYPES:
+        if isinstance(self.parameter_type, list):
+            if not any(isinstance(val, x) for x in self.parameter_type):
+                msg += "Expected one of the following %s." % TYPES[self.parameter_type]
+                raise ParameterFieldTypeMismatch(msg)
+            return str(val) if self.return_str else val
+        elif self.parameter_type in TYPES:
             if type(val) != self.parameter_type:
                 msg += "Expected a %s." % TYPES[self.parameter_type]
                 raise ParameterFieldTypeMismatch(msg)

metaflow/plugins/argo/argo_workflows.py

@@ -522,7 +522,9 @@ def _process_triggers(self):
             params = set(
                 [param.name.lower() for var, param in self.flow._get_parameters()]
             )
-            for event in self.flow._flow_decorators.get("trigger")[0].triggers:
+            trigger_deco = self.flow._flow_decorators.get("trigger")[0]
+            trigger_deco.format_deploytime_value()
+            for event in trigger_deco.triggers:
                 parameters = {}
                 # TODO: Add a check to guard against names starting with numerals(?)
                 if not re.match(r"^[A-Za-z0-9_.-]+$", event["name"]):
@@ -562,9 +564,11 @@ def _process_triggers(self):
 
         # @trigger_on_finish decorator
         if self.flow._flow_decorators.get("trigger_on_finish"):
-            for event in self.flow._flow_decorators.get("trigger_on_finish")[
-                0
-            ].triggers:
+            trigger_on_finish_deco = self.flow._flow_decorators.get(
+                "trigger_on_finish"
+            )[0]
+            trigger_on_finish_deco.format_deploytime_value()
+            for event in trigger_on_finish_deco.triggers:
                 # Actual filters are deduced here since we don't have access to
                 # the current object in the @trigger_on_finish decorator.
                 triggers.append(