The message handler globally installed by the logger silently drop
messages if the logger is not logging. On top of it, it doesn't log
debug messages by default.
Anything not logged is currently silently discarded. This can come as a
surprise to a developer trying to contribute for the first time and
adding some debug message for some reason.
We're thus trying to strike a middle ground which is that debug messages
get a regular output if the logger isn't interested in them.
Signed-off-by: Kevin Ottens <kevin.ottens@nextcloud.com>
Add the log level and category name in the output. Only output the
thread ID and function name for qCDebug statements as they are not
necessary for general use and make the log harder to read.
Also make sure that the message pattern is set when NO_MSG_HANDLER is
used. Using an environment variable should have priority over it anyway.
The csync log level was only set up on startup, and for log files.
Fix the issue by making Logger::isNoop rely on being explicitly activated
for the log window instead of relying on the presence of a connected
signal, and move the csync log level logic in Logger.
