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copied!<p>There are a number of elements to this, some to do with software, some to do with process.</p> <p>Version control systems are just that, version control. The ability to roll back, branch and merge, etc. that whether they are centralised or distributed and they both have up and down sides. VCS per se do not help you to code better or run projects better they facilitate the process of development in teams if and when teams are run properly. In other words you can screw up just as royally using SVN or Mercurial as you can without it.</p> <p>Where CI comes in is rather than code for several days and then commit, then build the project and test, coder commit more frequently, 1/2 day 1 day (max) and the project is built and tested (not released to live). This means that any errors are picked up earlier and can be more easily rectified as less code has been committed and the programmers memory is fresher.</p> <p>CI can be done manually, or it can be scripted, writing CLI scripts will do it, or one of the number of CI software tools that will integrate with CVS can be setup to do this process automatically or semi-automatically to reduce the management and the ability to make mistakes.</p> <p>The advantage of using existing tools, Mercurial + Hudson, or SVN and Cruise Control, is that you are piggy backing on the wisdom and experience of people who probably screwed up royally at some point but learnt the lesson. What you cannot do though is get it out of the box and use it and expect it to work with out adding your own process for your own project into the mix.</p>

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