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Basic Remote IO Application

Project description

trimarlib-brio

Basic Remote Input/Output - Python application

Getting started

These instructions will get you a copy of the project on your local machine for development and testing purposes. See Deployment for notes on how to deploy the project on a live system.

Prerequisites

The build process requires some basic development tools:

  • make - GNU Make program, either for *nix or Windows system, used to execute build and test targets
  • git - used not only to clone the repository, but also in auto-versioning (see Versioning)
  • python3

Two standard Python packages are used for build and installation steps:

  • setuptools
  • wheel

The application depends on the following libraries:

  • trimarlib-sysfsgpio
  • trimarlib-newland
  • json-rpc

These dependencies are defined in the setup.py installation script and therefore should be automatically satisfied by pip.

Building and releasing

Invoking make all (default target) prepares archives for distribution. It is done in two steps:

  1. query Git repository for tags (git describe command) to determine current version and generate version.py file,
  2. invoke Python interpreter passing setup.py script to prepare source and wheel distributions.

The Python interpreter invoked by the Makefile defaults to python - it is possible to override it passing a PYTHON variable to the command, e.g. make all PYTHON=python3.

The release process is automated and based on GitLab CI/CD environment - each commit triggers a build job which attempts to make and install built packages. If the commit is tagged, the built wheel distribution is passed to the deployment stage and the runner attempts to upload the package to the repository specified in project settings.

Deployment

Installation via pip (i.e. pip install trimarlib-brio) is the recommended method of deployment.

After the package has been installed it is recommended to perform additional steps:

  1. Install gpio-exporter.service and gpio.rules - see sysfsgpiolib project for more information;
  2. Install brio.service and brio.ini configuration file.

The second step is performed using the entry points exposed by the package:

  • brio-install-service - copies the predefined service file to /etc/systemd/system/brio.service, reloads systemd daemons and enables the service. Run brio-install-service -h for more information;
  • brio-install-configuration - copies the default configuration file to the default location. Run brio-install-configuration -h for more information.
  • brio-install - performs the above steps in one go. Run brio-install -h for more information.

The application is started using another entry point - brio-app. Run brio-app -h for more information.

Versioning

The project is versioned using a simple pattern based on repository tagging feature. See Makefile for implementation details, for versions available see tags on this repository.

Usage

See docstrings for API documentation.

Example of using the server in a custom application:

from brio import Server
import time


server = Server()
server.configure()
server.start()
time.sleep(10)
server.stop()

The application is run using the brio-app entry point, see Deployment for more information.

License

This software is licensed under the MIT License - see LICENSE.


Related documents

This software conforms to the JSON RPC protocol, see website for more information.

Project details


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