Continuous Integration (CI) is the practice of merging multiple developers code to the master code several times a day. Some services help achieve this by running specified tasks before code is to be merged. The Penneo frontend team uses such a service called Travis CI. “Travis CI is a hosted, distributed continuous integration service used to build and test software projects hosted at GitHub.”.
In Penneo Travis CI is used to build the master project with the newly added code and seeing whether there is a build time error. It also runs a Linter script to check that all of the coding standards have been met. Travis runs when a pull request has been made to GitHub, from there it is able to get the newly pushed code and merge and build, this is possible as Travis is hosted. If a Travis fails the pull request that initiated the build process will not be able to be merged to the master code.