Fix #119 -- Handle verbosity=0 level correctly and suppress all prints/logs

CHANGELOG.md

@@ -9,6 +9,7 @@ New features:
 
 Miscellaneous:
 * Add complete and working support for `toml` configuration files
+* Handle `--verbosity 0` or `-v 0` correctly to not print anything from the linter
 * Add code coverage to the linter
 * Renamed `master` branch to `main`
 

django_migration_linter/management/commands/lintmigrations.py

@@ -138,6 +138,8 @@ class Command(BaseCommand):
 
         if options["verbosity"] > 1:
             logging.basicConfig(format="%(message)s", level=logging.DEBUG)
+        elif options["verbosity"] == 0:
+            logger.disabled = True
         else:
             logging.basicConfig(format="%(message)s")
 
@@ -201,6 +203,7 @@ class Command(BaseCommand):
             exclude_migration_tests=config["exclude_migration_tests"],
             quiet=config["quiet"],
             warnings_as_errors=config["warnings_as_errors"],
+            no_output=options["verbosity"] == 0,
         )
         linter.lint_all_migrations(
             app_label=options["app_label"],

django_migration_linter/migration_linter.py

@@ -57,6 +57,7 @@ class MigrationLinter(object):
         exclude_migration_tests=None,
         quiet=None,
         warnings_as_errors=False,
+        no_output=False,
     ):
         # Store parameters and options
         self.django_path = path
@@ -74,6 +75,7 @@ class MigrationLinter(object):
         self.only_unapplied_migrations = only_unapplied_migrations
         self.quiet = quiet or []
         self.warnings_as_errors = warnings_as_errors
+        self.no_output = no_output
 
         # Initialise counters
         self.reset_counters()
@@ -248,7 +250,8 @@ class MigrationLinter(object):
     def print_linting_msg(self, app_label, migration_name, msg, lint_result):
         if lint_result.value in self.quiet:
             return
-        print("({0}, {1})... {2}".format(app_label, migration_name, msg))
+        if not self.no_output:
+            print("({0}, {1})... {2}".format(app_label, migration_name, msg))
 
     def print_errors(self, errors):
         if MessageType.ERROR.value in self.quiet:
@@ -260,7 +263,8 @@ class MigrationLinter(object):
                 if err.get("column"):
                     error_str += ", column: {0}".format(err["column"])
                 error_str += ")"
-            print(error_str)
+            if not self.no_output:
+                print(error_str)
 
     def print_warnings(self, warnings):
         if MessageType.WARNING.value in self.quiet:
@@ -268,10 +272,12 @@ class MigrationLinter(object):
 
         for warning_details in warnings:
             warn_str = "\t{}".format(warning_details["msg"])
-            print(warn_str)
+            if not self.no_output:
+                print(warn_str)
 
     def print_summary(self):
-        print()
+        if self.no_output:
+            return
         print("*** Summary ***")
         print("Valid migrations: {}/{}".format(self.nb_valid, self.nb_total))
         print("Erroneous migrations: {}/{}".format(self.nb_erroneous, self.nb_total))