src: improve logging

Adds new logging handler redirecting messages to the log file
located in the Samba shared directory (applies to live mode
clients, i.e: ogLive)

Parses log level configuration from ogclient.json. See:

{
	"opengnsys": {
		...
                "log": "INFO",
		...
	}
	...
}

Adds --debug option to set root logger level to DEBUG when starting
ogClient. Overrides log level from config file.

In addition:

- Replaces any occurence of print with a corresponding logging function.
- Unsets log level for handlers, use root logger level instead.
- Default level for root logger is INFO.
- Replaces level from response log messages to debug (ogRest)

1 files changed, 2 insertions, 1 deletions

diff --git a/src/utils/cache.py b/src/utils/cache.py
index 150a5df..3bd4053 100644
--- a/src/utils/cache.py
+++ b/src/utils/cache.py
@@ -6,6 +6,7 @@
 # Free Software Foundation; either version 3 of the License, or
 # (at your option) any later version.
 
+import logging
 import os
 
 from src.utils.fs import mount_mkdir, umount
@@ -45,7 +46,7 @@ def write_cache_txt(content):
     """
     client_ip = getifaddr(os.getenv('DEVICE'))
     with open(OGCLIENT_LOG_CACHE.format(ip=client_ip), 'w') as f:
-        print("About to write")
+        logging.debug('Writing cache contents to %s.cache.txt', client_ip)
         f.write(content)
 
 def generate_cache_txt():