CI: Add new lint for multi-output recipes

.github/workflows/scripts/linter.py

@@ -91,6 +91,9 @@ def _lint_recipes(gh, pr):
         sources_section = get_section(
             meta, "source", lints, recipe_version=recipe_version
         )
+        outputs_section = get_section(
+            meta, "outputs", lints, recipe_version=recipe_version
+        )
         extra_section = get_section(
             meta, "extra", lints, recipe_version=recipe_version
         )
@@ -101,6 +104,8 @@ def _lint_recipes(gh, pr):
         else:
             recipe_name = package_section.get("name", "").strip()
 
+        recipe_name = extra_section.get("feedstock-name", recipe_name)
+
         # 4. Check for existing feedstocks in conda-forge or bioconda
         if recipe_name:
             cf = gh.get_user("conda-forge")
@@ -214,6 +219,15 @@ def _lint_recipes(gh, pr):
                             'correct format. Please use "org/team" format.'
                         )
 
+        # 7. Check that feedstock-name is defined if recipe is multi-output
+        if outputs_section and ("feedstock-name" not in extra_section):
+            hints[fname].append(
+                "It looks like you are submitting a multi-output recipe. "
+                "In these cases, the correct name for the feedstock is ambiguous, "
+                "and our infrastructure defaults to the top-level `package.name` field. "
+                "Please add a `feedstock-name` entry in the `extra` section."
+            )
+
     return dict(lints), dict(hints), extra_edits