My most recent project was helping a major online retailer to mature their build process as part of a wider effort to improve their IT effectiveness through the injection of development best practices.
When we came onboard manual intervention was needed for any of their builds or deployments to work and so it was rare for more than a couple of builds or deployments to be completed successfully in a day. Now we often have up to 1,000 builds running every day - what’s more the majority of them now pass!
This article looks at a few of the techniques we’ve had to put in place to enable this transformation and what we’ve learnt along the way.
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Coding really is become child’s play. This recent BBC news article points to some of the ways kids are being introduced to programming.
The good people at MIT have put together scratch a visual tool allowing kids to do drag-n-drop coding. The help screens give a good idea of how it works. Basically differently shaped blocks are put together (lego style) to form programs: a loop looks like a capital C and holds all the nested statements; booleans are pointy ended and only fit in pointy slots - likewise numbers are round and only fit in round slots … a nice simple introduction to strongly-typed languages. It actually fits pretty closely with how I visualise blocks of code, so it looks like a great way to introduce children to the coding mind-set. The welcoming colourful blocks are non-threatening and simple to understand.
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I’ve often found that it’s much more effective to show clients what their problems are, rather than just telling them. Recently I’ve ended up using GraphViz as a great tool for high-lighting complexity that needs to be addressed.
At the client I’m currently working for the complexity of the build scripts was getting out of hand. I wanted to goad the customer into prioritising some simplification work. So I turned to GraphViz to depict how complex the build was. The build we’re using is a large, centralised, Ant script that builds about 10 different applications. It manages everything through the process of compile, test, package and deploy.
I found the handy ant2dot.xsl tool that uses XSL to transform an Ant build file into a DOT format graph representing the flow and dependencies between the various build targets.
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