In the context of AWS CodeBuild, what is the purpose of the pre_build phase?

The pre_build phase in AWS CodeBuild serves a critical purpose by preparing and configuring the build environment before the actual build process begins. During this phase, various activities can occur, such as installing dependencies, setting environment variables, or performing any necessary setup tasks that are required to create a successful build environment. This ensures that when the build commands are executed in the build phase, everything is correctly set up and available, which can significantly impact the build's success.

By configuring the build environment effectively in the pre_build phase, developers can address system requirements and prerequisites that may otherwise lead to failures or issues when running the build commands. This phase is essential for ensuring that the subsequent steps can run smoothly and efficiently.