Travis CI
Travis CI is a hosted continuous integration and deployment system. There are two versions of it, travis-ci.com for private repositories, and travis-ci.org for public repositories.
This repository contains the central issue tracker for the Travis CI project.
Documentation
Documentation for the Travis CI project can be found at https://docs.travis-ci.com.
Other repositories
Travis CI consists of many different sub-projects. The main ones are:
travis-api
travis-api is the Sinatra app that's responsible for serving our API. It responds to different HTTP endpoints and runs services in travis-core. Very little logic is in this repository.
travis-build
travis-build creates the build
script for each job. It takes the configuration from the .travis.yml file and
creates a bash script that is then run in the build environment by
travis-worker.
travis-core
travis-core holds most of the logic for Travis CI. This repository is shared across several other apps and holds the models, services, and other things that these apps need.
travis-cookbooks
travis-cookbooks holds the Chef cookbooks that are used to provision the build environments.
travis-hub
travis-hub collects events from other apps and notifies other apps about the events. For example, it notifies travis-tasks about builds starting and finishing so notifications can be sent out.
travis-hub is also responsible for enqueueing jobs that have been created and enforcing the Quality of Service restrictions, such as the number of concurrent builds per user.
travis-listener
travis-listener receives notifications from GitHub whenever commits are pushed or pull requests are opened. They are then pushed onto RabbitMQ for other apps to process.
travis-logs
travis-logs receives log updates from travis-worker, saves them to the database and pushes them to the web client. When a job is finished, travis-logs is responsible for pushing the log to Amazon S3 for archiving.
travis-support
travis-support holds shared logic for the different Travis CI apps. It is different from travis-core in that it holds more generic things, like how to run an async job or how to handle exceptions.
travis-tasks
travis-tasks receives notifications from travis-hub and sends out notifications to the different notification providers as needed.
travis-web
travis-web is our main Web client. It is written using Ember and communicates with travis-api to get information and gets live updates from travis-hub and travis-logs through Pusher.
travis-worker
travis-worker is responsible for running the build scripts in a clean environment. It streams the log output to travis-logs and pushes state updates (build starting/finishing) to travis-hub.