Add no-header run option (#7869)

Co-authored-by: Pierre Sassoulas <[email protected]>

Author: clavedeluna

doc/whatsnew/fragments/5362.feature

@@ -0,0 +1,3 @@
+Added the ``no-header`` output format. If enabled with ``--output-format=no-header``, it will not include the module name in the output.
+
+Closes #5362

pylint/reporters/text.py

@@ -150,6 +150,10 @@ def colorize_ansi(
     return msg
 
 
+def make_header(msg: Message) -> str:
+    return f"************* Module {msg.module}"
+
+
 class TextReporter(BaseReporter):
     """Reports messages and layouts in plain text."""
 
@@ -199,11 +203,8 @@ def write_message(self, msg: Message) -> None:
     def handle_message(self, msg: Message) -> None:
         """Manage message of different type and in the context of path."""
         if msg.module not in self._modules:
-            if msg.module:
-                self.writeln(f"************* Module {msg.module}")
-                self._modules.add(msg.module)
-            else:
-                self.writeln("************* ")
+            self.writeln(make_header(msg))
+            self._modules.add(msg.module)
         self.write_message(msg)
 
     def _display(self, layout: Section) -> None:
@@ -212,6 +213,18 @@ def _display(self, layout: Section) -> None:
         TextWriter().format(layout, self.out)
 
 
+class NoHeaderReporter(TextReporter):
+    """Reports messages and layouts in plain text without a module header."""
+
+    name = "no-header"
+
+    def handle_message(self, msg: Message) -> None:
+        """Write message(s) without module header."""
+        if msg.module not in self._modules:
+            self._modules.add(msg.module)
+        self.write_message(msg)
+
+
 class ParseableTextReporter(TextReporter):
     """A reporter very similar to TextReporter, but display messages in a form
     recognized by most text editors :
@@ -296,10 +309,7 @@ def handle_message(self, msg: Message) -> None:
         """
         if msg.module not in self._modules:
             msg_style = self._get_decoration("S")
-            if msg.module:
-                modsep = colorize_ansi(f"************* Module {msg.module}", msg_style)
-            else:
-                modsep = colorize_ansi(f"************* {msg.module}", msg_style)
+            modsep = colorize_ansi(make_header(msg), msg_style)
             self.writeln(modsep)
             self._modules.add(msg.module)
         msg_style = self._get_decoration(msg.C)
@@ -313,6 +323,7 @@ def handle_message(self, msg: Message) -> None:
 
 def register(linter: PyLinter) -> None:
     linter.register_reporter(TextReporter)
+    linter.register_reporter(NoHeaderReporter)
     linter.register_reporter(ParseableTextReporter)
     linter.register_reporter(VSTextReporter)
     linter.register_reporter(ColorizedTextReporter)

tests/test_self.py

@@ -1278,6 +1278,18 @@ def test_line_too_long_useless_suppression(self) -> None:
 
         self._test_output([module, "--enable=all"], expected_output=expected)
 
+    def test_output_no_header(self) -> None:
+        module = join(HERE, "data", "clientmodule_test.py")
+        expected = "Unused variable 'local_variable'"
+        not_expected = textwrap.dedent(
+            """************* Module data.clientmodule_test"""
+        )
+
+        args = [module, "--output-format=no-header"]
+        self._test_output(
+            args, expected_output=expected, unexpected_output=not_expected
+        )
+
 
 class TestCallbackOptions:
     """Test for all callback options we support."""