Add an option to log to stdout

Closes: https://github.com/Fat-Zer/Printrun/pull/new/log-stdout

printrun/pronterface.py

@@ -81,35 +81,38 @@ def format_length(mm, fractional=2):
     return '%%.%df' % fractional % units + suffix
 
 class ConsoleOutputHandler:
-    """Handle console output. All messages go through the logging submodule. We setup a logging handler to get logged messages and write them to both stdout (unless a log file path is specified, in which case we add another logging handler to write to this file) and the log panel.
-    We also redirect stdout and stderr to ourself to catch print messages and al."""
+    """Handle console output. All messages go through the logging submodule. We setup a logging handler to get logged
+    messages and write them to both stdout (unless a log file path is specified, in which case we add another logging
+    handler to write to this file) and the log panel. We also redirect stdout and stderr to ourselves to catch print
+    messages and al."""
 
-    def __init__(self, target, log_path):
+    def __init__(self, target, log_path, log_stdout):
         self.stdout = sys.stdout
         self.stderr = sys.stderr
         sys.stdout = self
         sys.stderr = self
-        self.print_on_stdout = not log_path
-        if log_path:
-            setup_logging(self, log_path, reset_handlers = True)
-        else:
-            setup_logging(sys.stdout, reset_handlers = True)
+
+        self.print_on_stdout = log_stdout or not log_path
         self.target = target
 
+        setup_logging(self, log_path, reset_handlers=True)
+
     def __del__(self):
         sys.stdout = self.stdout
         sys.stderr = self.stderr
 
     def write(self, data):
         try:
             self.target(data)
-        except:
-            pass
+        except Exception as e:
+            # This shouldn't generally happen, unless there is something very wrong with the code
+            self.stderr.write(_("An exception occurred during an attempt to log a message: {}").format(e))
+
         if self.print_on_stdout:
             self.stdout.write(data)
 
     def flush(self):
-        if self.stdout:
+        if self.print_on_stdout:
             self.stdout.flush()
 
 class PronterWindow(MainWindow, pronsole.pronsole):
@@ -223,7 +226,7 @@ def __init__(self, app, filename = None, size = winsize):
         self.statusbar = self.CreateStatusBar()
         self.statusbar.SetStatusText(_("Not connected to printer."))
 
-        self.t = ConsoleOutputHandler(self.catchprint, self.settings.log_path)
+        self.t = ConsoleOutputHandler(self.catchprint, self.settings.log_path, self.settings.log_stdout)
         self.stdout = sys.stdout
         self.slicing = False
         self.loading_gcode = False

printrun/settings.py

@@ -409,7 +409,9 @@ def __init__(self, root):
         self._add(StringSetting("start_command", "", _("Start Command:"), _("Executable to run when the print is started"), "External"))
         self._add(StringSetting("final_command", "", _("Final Command:"), _("Executable to run when the print is finished"), "External"))
         self._add(StringSetting("error_command", "", _("Error Command:"), _("Executable to run when an error occurs"), "External"))
-        self._add(DirSetting("log_path", str(Path.home()), _("Log Path:"), _("Path to the log file. An empty path will log to the console."), "UI"))
+        self._add(DirSetting("log_path", str(Path.home()), _("Log Path:"),
+                             _("Path to the log file. If the path is a directory the file will be named 'printrun.log'"), "UI"))
+        self._add(BooleanSetting("log_stdout", False, _("Log to console:"), _("Duplicate log messages to stdout"), "UI"))
 
         self._add(HiddenSetting("project_offset_x", 0.0))
         self._add(HiddenSetting("project_offset_y", 0.0))