Enable setting up Python logging

py/logging_setup.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import logging
+
+
+LOG_LEVELS = [logging.DEBUG, logging.INFO, logging.WARNING, logging.ERROR,
+              logging.CRITICAL]
+LOG_LEVEL_NAMES = [logging.getLevelName(lvl) for lvl in LOG_LEVELS]
+
+
+def get_log_level_value(log_level_name):
+    log_level_value = next(
+        (lvl for lvl in LOG_LEVELS
+         if logging.getLevelName(lvl) == log_level_name),
+        None
+    )
+
+    if log_level_value is None:
+        raise ValueError('Unknown log level: ' + log_level_name)
+    else:
+        return log_level_value
+
+
+def setup(log_level_name):
+    log_level_name = strip_quotes(log_level_name)
+
+    log_level_value = next(
+        (lvl for lvl in LOG_LEVELS
+         if logging.getLevelName(lvl) == log_level_name),
+        None
+    )
+
+    if log_level_value is None:
+        raise ValueError('Unknown log level: ' + log_level_name)
+
+    logging.basicConfig(
+        datefmt='%Y-%m-%dT%H:%M:%S%z',
+        format='%(asctime)s %(levelname)s [%(name)s.%(funcName)s:%(lineno)d] %(message)s',  # noqa: E501
+        level=log_level_value
+    )
+
+
+def strip_quotes(s):
+    if len(s) >= 2 and s[0] == '"' and s[-1] == '"':
+        return s[1:-1]
+    else:
+        return s

qml/YubiKey.qml

@@ -15,7 +15,9 @@ Python {
     property var entries: []
     property int nextRefresh: 0
     property var enabled: []
-    property bool ready: false
+    property bool yubikeyReady: false
+    property bool loggingReady: false
+    readonly property bool ready: yubikeyReady && loggingReady
     property var queue: []
     property bool hasOTP: enabled.indexOf('OTP') !== -1
     property bool hasCCID: enabled.indexOf('CCID') !== -1
@@ -25,17 +27,18 @@ Python {
     property int expiration: 0
     signal wrongPassword
     signal credentialsRefreshed
+    signal enableLogging(string log_level)
 
     Component.onCompleted: {
         importModule('site', function () {
             call('site.addsitedir', [appDir + '/pymodules'], function () {
                 addImportPath(urlPrefix + '/py')
+
                 importModule('yubikey', function () {
-                    ready = true
-                    for (var i in queue) {
-                        do_call(queue[i][0], queue[i][1], queue[i][2])
-                    }
-                    queue = []
+                    yubikeyReady = true
+                })
+                importModule('logging_setup', function() {
+                    loggingReady = true
                 })
             })
         })
@@ -45,6 +48,19 @@ Python {
         device.validated = false
     }
 
+    onEnableLogging: {
+        do_call('logging_setup.setup', [log_level || 'DEBUG'])
+    }
+
+    onReadyChanged: {
+        if (ready) {
+            for (var i in queue) {
+                do_call(queue[i][0], queue[i][1], queue[i][2])
+            }
+            queue = []
+        }
+    }
+
     function do_call(func, args, cb) {
         if (!ready) {
             queue.push([func, args, cb])