Implemented disabling logging configuration & added config file

hydra/conf/hydra/hydra_logging/none.yaml

@@ -0,0 +1,5 @@
+# @package _group_
+
+version: 1
+root: null
+disable_existing_loggers: false

hydra/conf/hydra/job_logging/none.yaml

@@ -0,0 +1,5 @@
+# @package _group_
+
+version: 1
+root: null
+disable_existing_loggers: false

hydra/core/utils.py

@@ -38,7 +38,8 @@ def configure_log(
         conf: Dict[str, Any] = OmegaConf.to_container(  # type: ignore
             log_config, resolve=True
         )
-        logging.config.dictConfig(conf)
+        if conf["root"] is not None:
+            logging.config.dictConfig(conf)
     else:
         # default logging to stdout
         root = logging.getLogger()

news/1130.feature

@@ -0,0 +1 @@
+It is now possible to disable Hydra's logging configuration

tests/test_examples/test_configure_hydra.py

@@ -78,6 +78,17 @@ def test_logging(tmpdir: Path) -> None:
     assert result == "[INFO] - Info level message"
 
 
+def test_disabling_logging(tmpdir: Path) -> None:
+    cmd = [
+        "examples/configure_hydra/logging/my_app.py",
+        "hydra.run.dir=" + str(tmpdir),
+        "hydra/job_logging=none",
+        "hydra/hydra_logging=none",
+    ]
+    result, _err = get_run_output(cmd)
+    assert result == ""
+
+
 def test_workdir_config(monkeypatch: Any, tmpdir: Path) -> None:
     script = str(Path("examples/configure_hydra/workdir/my_app.py").absolute())
     monkeypatch.chdir(tmpdir)

website/docs/tutorials/basic/running_your_app/4_logging.md

@@ -53,11 +53,12 @@ $ python my_app.py hydra.verbose=[__main__,hydra]
 [2019-09-29 13:06:00,896][__main__][DEBUG] - Debug level message
 ```
 
-You can disable the logging output using by setting `hydra/job_logging` to `disabled'   
+You can disable the logging output by setting `hydra/job_logging` to `disabled`   
 ```commandline
 $ python my_app.py hydra/job_logging=disabled
 <NO OUTPUT>
 ```
 
-Logging can be [customized](/configure_hydra/logging.md).
+You can also set `hydra/job_logging=none` and `hydra/hydra_logging=none` if you do not want Hydra to configure the logging.
 
+Logging can be [customized](/configure_hydra/logging.md).