Hello, there!

pmb/helpers/logging.py

@@ -0,0 +1,76 @@
+"""
+Copyright 2017 Oliver Smith
+
+This file is part of pmbootstrap.
+
+pmbootstrap is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+pmbootstrap is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with pmbootstrap.  If not, see <http://www.gnu.org/licenses/>.
+"""
+import logging
+import os
+
+
+class log_handler(logging.StreamHandler):
+    """
+    Write to stdout and to the already opened log file.
+    """
+    _args = None
+
+    def emit(self, record):
+        try:
+            msg = self.format(record)
+
+            # INFO or higher: Write to stdout
+            if not self._args.quiet and record.levelno >= logging.INFO:
+                stream = self.stream
+                stream.write(msg)
+                stream.write(self.terminator)
+                self.flush()
+
+            # Everything: Write to logfd
+            msg = "(" + str(os.getpid()).zfill(6) + ") " + msg
+            self._args.logfd.write(msg + "\n")
+            self._args.logfd.flush()
+
+        except (KeyboardInterrupt, SystemExit):
+            raise
+        except:
+            self.handleError(record)
+
+
+def init(args):
+    """
+    Set log format and add the log file descriptor to args.logfd.
+    """
+    if not os.path.exists(args.work):
+        os.makedirs(args.work)
+
+    date_format = "%H:%M:%S"
+    setattr(args, "logfd", open(args.log, "a+"))
+
+    root_logger = logging.getLogger()
+    root_logger.handlers = []
+
+    formatter = None
+    root_logger.setLevel(logging.DEBUG)
+    if args.verbose:
+        formatter = logging.Formatter("[%(asctime)s %(module)s]"
+                                      " %(message)s", datefmt=date_format)
+    else:
+        formatter = logging.Formatter("[%(asctime)s] %(message)s",
+                                      datefmt=date_format)
+
+    handler = log_handler()
+    log_handler._args = args
+    handler.setFormatter(formatter)
+    root_logger.addHandler(handler)