ocrd-utils 2.5.3

OCR-D framework - shared code, helpers, constants

# ocrd_utils

> OCR-D framework - shared code, helpers, constants

See https://github.com/OCR-D/core

## OCR-D Module Logging

File-based control over logging facilities is done with standard [Python 3 logging module configuration files](https://docs.python.org/3.6/howto/logging.html#configuring-logging). This way, the level, format and destinations of log messages can be customized for all OCR-D modules individually and persistently, in the usual syntax.

A template configuration file (with commented examples) is included in [ocrd_logging.conf](./ocrd_logging.conf). This is meant as an example, and should be customized.

To get into effect, you must put a copy (under the same name) into: 1. your current working directory, 2. your user directory, or 3. /etc. These directories are searched in said order, and the first find wins. When no config file is found, the default logging configuration applies (which uses only stdout and the INFO loglevel for most loggers, cf. [here](./ocrd_logging.py)).

Thus, a configuration file will override all settings from the default configuration, and from configuration files in lower-priority directories.

For more information about logging, handlers and formats, see [Python documentation](https://docs.python.org/3/howto/logging.htm).

#### Docker containers

In the Dockerfiles used to build ocrd/core (and subsequently ocrd/all), the above mentioned template is directly copied to /etc/ocrd_logging.conf within the container image. This cofiguration is thereby also the default configuration for OCR-D containers.

Thus, if you want to customize logging rules in one of these Docker containers, you can create a custom configuration file and either: - place it into your local workspace directory when running the OCR-D container. - mount it under /etc when starting up the container, e.g. docker run –mount type=bind,source=host/path/to/your-template.conf,destination=/etc/ocrd_logging.conf ocrd/all - include a Dockerfile step (layer or stage) which copies this into /etc/ocrd_logging.conf at build time in your own Docker image.