Add sonic-clear logging command

clear/main.py

@@ -3,6 +3,7 @@
 import subprocess
 import sys
 import click
+import glob
 import utilities_common.cli as clicommon
 import utilities_common.multi_asic as multi_asic_util
 from sonic_py_common.general import getstatusoutput_noshell_pipe
@@ -545,6 +546,28 @@ def route(prefix, vrf, namespace):
         command += ['-n', str(namespace)]
     clicommon.run_command(command)
 
+@click.option('--all', '-a', is_flag=True, help='Delete also compressed logs')
+@cli.command()
+def logging(all):
+    """Clear logging files"""
+    log_path_arr = ["/var/log"]
+    if os.path.exists("/var/log.tmpfs"):
+        log_path_arr += ["/var/log.tmpfs"]
+
+    files_to_delete=[]
+    for log_path in log_path_arr:
+        if all:
+            files_to_delete += glob.glob(f"{log_path}/syslog*")
+        else:
+            if os.path.isfile(f"{log_path}/syslog"):
+                files_to_delete += [f"{log_path}/syslog"]            
+            if os.path.isfile(f"{log_path}/syslog.1"):
+                files_to_delete += [f"{log_path}/syslog.1"]
+
+    for f in files_to_delete:
+        cmd = ['sudo', 'rm','-f',f]
+        run_command(cmd)
+
 
 # Load plugins and register them
 helper = util_base.UtilHelper()

tests/clear_test.py

@@ -1,8 +1,10 @@
 import click
 import pytest
+import glob
 import clear.main as clear
 from click.testing import CliRunner
 from unittest.mock import patch, MagicMock
+from unittest import mock
 
 class TestClear(object):
     def setup(self):
@@ -319,3 +321,27 @@ def test_flowcnt_route_route(self, mock_run_command):
     def teardown(self):
         print('TEAR DOWN')
 
+class TestClearLogging(object):
+    def setup(self):
+        print('SETUP')
+
+    @patch('clear.main.run_command')
+    @patch("glob.glob", MagicMock(return_value=['abc']))
+    def test_logging_all(self, mock_run_command):
+        runner = CliRunner()
+        result = runner.invoke(clear.cli.commands['logging'], ['--all'])
+        assert result.exit_code == 0
+        mock_run_command.assert_called_with(['sudo', 'rm' ,'-f', 'abc'])
+
+    @patch('clear.main.run_command')
+    @patch("os.path.isfile",MagicMock(return_value=True))
+    def test_logging(self, mock_run_command):
+        runner = CliRunner()
+        result = runner.invoke(clear.cli.commands['logging'])
+        assert result.exit_code == 0
+        mock_run_command.assert_has_calls([mock.call(['sudo', 'rm' ,'-f', '/var/log/syslog']),
+                                          mock.call(['sudo', 'rm' ,'-f', '/var/log/syslog.1'])],
+        any_order=True)
+
+    def teardown(self):
+        print('TEAR DOWN')