Add support for positional app_label and migration_name arguments

django_migration_linter/management/commands/lintmigrations.py

@@ -26,6 +26,18 @@ class Command(BaseCommand):
     help = "Lint your migrations"
 
     def add_arguments(self, parser):
+        parser.add_argument(
+            "app_label",
+            nargs="?",
+            type=str,
+            help="App label of an application to lint migrations.",
+        )
+        parser.add_argument(
+            "migration_name",
+            nargs="?",
+            type=str,
+            help="Linting will only be done on that migration only.",
+        )
         parser.add_argument(
             "--git-commit-id",
             type=str,
@@ -191,6 +203,8 @@ class Command(BaseCommand):
             warnings_as_errors=config["warnings_as_errors"],
         )
         linter.lint_all_migrations(
+            app_label=options["app_label"],
+            migration_name=options["migration_name"],
             git_commit_id=options["git_commit_id"],
             migrations_file_path=options["include_migrations_from"],
         )

django_migration_linter/migration_linter.py

@@ -101,7 +101,13 @@ class MigrationLinter(object):
     def should_use_cache(self):
         return self.django_path and not self.no_cache
 
-    def lint_all_migrations(self, git_commit_id=None, migrations_file_path=None):
+    def lint_all_migrations(
+        self,
+        app_label=None,
+        migration_name=None,
+        git_commit_id=None,
+        migrations_file_path=None,
+    ):
         # Collect migrations
         migrations_list = self.read_migrations_list(migrations_file_path)
         if git_commit_id:
@@ -113,8 +119,22 @@ class MigrationLinter(object):
         sorted_migrations = sorted(
             migrations, key=lambda migration: (migration.app_label, migration.name)
         )
+
+        specific_target_migration = (
+            self.migration_loader.get_migration_by_prefix(app_label, migration_name)
+            if app_label and migration_name
+            else None
+        )
+
         for m in sorted_migrations:
-            self.lint_migration(m)
+            if app_label and migration_name:
+                if m == specific_target_migration:
+                    self.lint_migration(m)
+            elif app_label:
+                if m.app_label == app_label:
+                    self.lint_migration(m)
+            else:
+                self.lint_migration(m)
 
         if self.should_use_cache():
             self.new_cache.save()

tests/functional/test_migration_linter.py

@@ -23,16 +23,12 @@ class BaseBackwardCompatibilityDetection(object):
         self.assertNotEqual(linter.nb_valid + linter.nb_erroneous, 0)
 
     def _launch_linter(self, app=None, commit_id=None):
-        if app is not None:
-            app = [app]
-
         linter = MigrationLinter(
             self.test_project_path,
-            include_apps=app,
             database=next(iter(self.databases)),
             no_cache=True,
         )
-        linter.lint_all_migrations(git_commit_id=commit_id)
+        linter.lint_all_migrations(app_label=app, git_commit_id=commit_id)
         return linter
 
     # *** Tests ***