Update types to return the languages for which we tried to run the pro engine

semgrep_metrics.atd

@@ -166,4 +166,6 @@ type misc = {
     ?ruleHashesWithFindings <ocaml mutable>: (string * int) list <json repr="object"> option;
     (* TODO: should be OSS | Pro, see semgrep_output_v1.atd engine_kind type *)
     ~engineRequested <python default="'OSS'"> <ocaml mutable>: string;
+    (* Since Semgrep 1.49.0 *)
+    ?interfileLanguagesUsed: string list option;
   }

semgrep_metrics.py

@@ -512,6 +512,7 @@ class Misc:
     numIgnored: Optional[int] = None
     ruleHashesWithFindings: Optional[List[Tuple[str, int]]] = None
     engineRequested: str = field(default_factory=lambda: 'OSS')
+    interfileLanguagesUsed: Optional[List[str]] = None
 
     @classmethod
     def from_json(cls, x: Any) -> 'Misc':
@@ -523,6 +524,7 @@ def from_json(cls, x: Any) -> 'Misc':
                 numIgnored=_atd_read_int(x['numIgnored']) if 'numIgnored' in x else None,
                 ruleHashesWithFindings=_atd_read_assoc_object_into_list(_atd_read_int)(x['ruleHashesWithFindings']) if 'ruleHashesWithFindings' in x else None,
                 engineRequested=_atd_read_string(x['engineRequested']) if 'engineRequested' in x else 'OSS',
+                interfileLanguagesUsed=_atd_read_list(_atd_read_string)(x['interfileLanguagesUsed']) if 'interfileLanguagesUsed' in x else None,
             )
         else:
             _atd_bad_json('Misc', x)
@@ -539,6 +541,8 @@ def to_json(self) -> Any:
         if self.ruleHashesWithFindings is not None:
             res['ruleHashesWithFindings'] = _atd_write_assoc_list_to_object(_atd_write_int)(self.ruleHashesWithFindings)
         res['engineRequested'] = _atd_write_string(self.engineRequested)
+        if self.interfileLanguagesUsed is not None:
+            res['interfileLanguagesUsed'] = _atd_write_list(_atd_write_string)(self.interfileLanguagesUsed)
         return res
 
     @classmethod

semgrep_output_v1.atd

@@ -762,6 +762,12 @@ type cli_output_extra = {
     ?rules_by_engine: rule_id_and_engine_kind list option;
     ?engine_requested: engine_kind option;
 
+    (* Reporting just the requested engine isn't granular enough. We want to know
+       what languages had rules that invoked interfile. This is particularly important 
+       for tracking the performance impact of new interfile languages *)
+    (* EXPERIMENTAL: since 1.49.0 *)
+    ?interfile_languages_used: string list option; 
+
     (* EXPERIMENTAL: since: 1.37.0 *)
     ~skipped_rules: skipped_rule list;
 }