Travis. yml , which is a YAML format text file, to the root directory of the repository. This file specifies the programming language used, the desired building and testing environment (including dependencies which must be installed before the software can be built and tested), and various other parameters.
When you run a build, Travis CI clones your GitHub repository into a brand-new virtual environment, and carries out a series of tasks to build and test your code. If one or more of those tasks fail, the build is considered broken.