At Tuenti, we do 3 code pushes per week, sometimes modifying thousands of files and running thousands of automated tests and build operations before, to ensure not only that the code works but also that proper localization is applied, bundles are generated and files get deployed to hundreds of servers as fast and reliable as possible.
We use opensource tools like Mercurial, MySQL, Jenkins, Selenium, PHPUnit and Rsync among our own in-house ones, and have different development, testing, staging and production environments.
We had to fight with problems like statics bundling and versioning, syntax errors and of course the fact that we have +100 engineers working on the codebase, merging and releasing more than a 15 branches the same day. We also switched from Subversion to Mercurial to obtain more flexibility and faster branching operations.
With this talk we will explain the process of how code changes in ourcode repository end up in live code, detailing some practices and tips that we apply, problems we had and how we solved them.