Continuous integration (CI) is the practice of merging all the software code changes and updates into a shared central repository/mainline. CI increases the efficiency of the team and encourages collaboration, by eliminating duplication and difficulties in incorporating code changes.
CI, a cornerstone technique of DevOps, eliminates the problems associated with long and tense manual software system integration. DevOps has been helping various organisations achieve success; and now, CI is enabling the automation of the software build process thereby providing anytime current builds for testing, demonstration or release purposes. Through its approach, CI allows teams to spend less time debugging and more time developing new features. Moreover, CI pushes developers to create modular and less complex code.
1. Apache Gump
Apache Gump is written in Python. It builds and compiles software code against the latest versions of projects. This allows Gump to detect incompatible modifications to that code within a short span of time (few hours) after such changes are uploaded onto the version control systems.
2. Buildbot
Buildbot is an open source CI tool which automates software integration, build and testing processes. It is written in Python over twisted libraries. Buildbot allows the running of the builds on a variety of operating systems like Windows, Linux, BSD, and OSX. Buildbot was constituted as a lightweight substitute to Mozilla’s Tinderbox project. It supports software configuration management (SCM) integration with software like SVN, CVS, Mercurial, Git, Monotone, and BitKeeper.
3. Bamboo
Bamboo is a CI tool developed by Atlassian. Bamboo is available in two versions, cloud and server. For the cloud version, Atlassian offers hosting service with the help of Amazon EC2 account. For the server version, self-hosting needs to be done. Bamboo supports well known Atlassian products, JIRA and BitBucket.
4. CircleCI
CircleCI is a CI tool hosted only on GitHub. It supports several languages, including Java, Python, Ruby/Rails, Node.js, PHP, Skala and Haskell. It offers services based on containers. CircleCI offers one container free, and any number of projects can be built on it. It offers up to five levels of parallelization (1x, 4x, 8x, 12x and 16x). Therefore, maximum parallelization of 16x can be achieved in one build. CircleCI also supports Docker platform.
5. Draco.NET
Draco.NET is a Windows service application created to enable Continuous Integration for DevOps. Draco.NET monitors the source code repository automatically rebuilds the project if changes happen and then emails the build result along with a list of changes since the last build. Draco.NET can check source control repositories like CVS, Visual SourceSafe, PVCS and SubVersion.
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