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I have been using git submodules for a while now and I was sometimes lost on how to use it correctly and efficiently. This post will guide you through the needs and usage of a Git submodule.
Once upon a time I started a new challenge within a new company. This company grew up so fast that the development processes and tools were not suitable anymore. Most projects started with only one developer and, at the time the company chose Subversion (SVN) as the main Concurrent Versions System (CVS) and a classic Waterfall process (linear) to manage projects. This choices froze things for years..
Coming from a large team (10 members) in a totally Agile environment the gap I faced was kind of huge. The lack of productivity that the company faced resulted from those ancient choices. A colleague and I decided to change things by introducing several development tools such as Git, Gitlab (GitHub alike), Jenkins (Continuous Integration), Composer (Dependency Manager for PHP) and Scrum (Agile development framework).
Now that you know How to automatically tag a Git repository an interesting command to know about is “How to automatically checkout the latest tag of a Git repository”. Let’s imagine that you want to automatically release a stable version of your product (that have dependencies or not) based on the latest version available on your repository.
An easy way to do it is to follow the following steps:
# Get new tags from the remote
$ git fetch --tags
# Get the latest tag name
$ latestTag=$(git describe --tags `git rev-list --tags --max-count=1`)
# Checkout the latest tag
$ git checkout $latestTag