I have joined a new company where the efforts to clean the code occasionally is almost nill. They have been adding new features on top of the old spaghetti code. It takes hours to build a simple feature.
The team has been using ReactJS of 2015 with backend written in NodeJS. There are multiple state management libraries being used and the code is tightly coupled with jQuery, as well.
I have recently joined and I don't have much work in the company. What should be my first steps in improving this code base?
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I recently heard a talk by a developer who inherited a similar situation when he became the sole developer at a company. The codebase was a large blob of code. Git had only been used once for a single commit long ago. And testing was done via a sandbox folder on the live server.
He took a microservices approach to incrementally improving the code base. Basically he pealed off discrete business functions which needed improvement, or created new verticals in the code for new functions, one at a time. And kept the code base as modular as he could. He gradually replaced the code base over time rather than rewriting everything at once.
Some of his advice included things like resist the urge to rewrite code that is working. Use third-party solutions for business functions when it works. He used Square Space for the home page/marketing pages, in part to let the non-developers make copy changes while continued to work on the custom code.
I think you are probably in a pickle though without the help of the rest of your company. Have you spoken with your senior developers and managers? Do they recognize a problem? Are they open to solutions?
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The first thing that I would do is analyse the current requirements of the project, which sections have the worst performance, which can split in small components, analyse the current behaviour and research the best solution for the current project problems. After that, write a report and show to the team, take their opinions and add to the report the new solutions that you colleague suggest. With this report open a side project taking the best of the current project and merge/update it with solutions in that report.
Adding to Kevin, make sure you speak to your senior developers before you start to rewrite because in any case your superiors shouldn't refuse your rewritten code pushing to production despite your code is tested and working flawlessly due to company's weird policies and processes, it would then be a waste of your time.
Well, I'm just going to assume there are no tests surrounding the code. As a newcomer, you're going to be fairly unfamiliar with how things work, so one of the things you could do write tests that assert existing behaviour. This gets code under test, gets you familiar with how things work right now, and gives you a base from which to refactor.
In general, an "if it ain't broke, don't fix it" approach is the pragmatic one in your situation, but but there are going to be times when stuff is broken and needs to be fixed. In that case, you might expand the scope of the fix to include a refactor of that specific component. The peril there is when your refactor starts to sprawl unnecessarily or excessively. If you feel like maybe your refactor has begun to necessarily expand its scope beyond what you anticipated, it's time to re-evaluate just how pragmatic it is to refactor at all.
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