Supress client debug messages

cliff sets log level to DEBUG in `run` function [1], need to overwrite
this configuration to depress DEBUG messages. This patch adds such
configuration in `prepare_to_run_command` function which will be called
by cliff after it sets log level to DEBUG [2][3].

[1] https://github.com/openstack/cliff/blob/master/cliff/app.py#L248
[2] https://github.com/openstack/cliff/blob/master/cliff/app.py#L279
[3] https://github.com/openstack/cliff/blob/master/cliff/app.py#L393

Change-Id: I5c270d74cb09e90b8a98fd8febf587b98db2306f
Closes-bug: #1681966

1 files changed, 30 insertions, 0 deletions

diff --git a/barbicanclient/barbican.py b/barbicanclient/barbican.py
index e26eb34..a462f1d 100644
--- a/barbicanclient/barbican.py
+++ b/barbicanclient/barbican.py
@@ -46,6 +46,13 @@ _IDENTITY_API_VERSION_3 = ['3']
 class Barbican(app.App):
     """Barbican command line interface."""
 
+    # verbose logging levels
+    WARNING_LEVEL = 0
+    INFO_LEVEL = 1
+    DEBUG_LEVEL = 2
+    CONSOLE_MESSAGE_FORMAT = '%(message)s'
+    DEBUG_MESSAGE_FORMAT = '%(levelname)s: %(name)s %(message)s'
+
     def __init__(self, **kwargs):
         self.client = None
 
@@ -328,6 +335,9 @@ class Barbican(app.App):
         """
         self.client_manager = namedtuple('ClientManager', 'key_manager')
         if cmd.auth_required:
+            # NOTE(liujiong): cliff sets log level to DEBUG in run function,
+            # need to overwrite this configuration to depress DEBUG messages.
+            self.configure_logging()
             self.client_manager.key_manager = self.create_client(self.options)
 
     def run(self, argv):
@@ -337,6 +347,26 @@ class Barbican(app.App):
             return 1
         return super(Barbican, self).run(argv)
 
+    def configure_logging(self):
+        """Create logging handlers for any log output."""
+        root_logger = logging.getLogger('')
+        # Set log level to INFO
+        root_logger.setLevel(logging.INFO)
+
+        # Send higher-level messages to the console via stderr
+        console = logging.StreamHandler(self.stderr)
+        console_level = {self.WARNING_LEVEL: logging.WARNING,
+                         self.INFO_LEVEL: logging.INFO,
+                         self.DEBUG_LEVEL: logging.DEBUG,
+                         }.get(self.options.verbose_level, logging.INFO)
+        if logging.DEBUG == console_level:
+            formatter = logging.Formatter(self.DEBUG_MESSAGE_FORMAT)
+        else:
+            formatter = logging.Formatter(self.CONSOLE_MESSAGE_FORMAT)
+        console.setFormatter(formatter)
+        root_logger.addHandler(console)
+        return
+
 
 def main(argv=sys.argv[1:]):
     logging.basicConfig()