AWS Amplify, different build settings for different branches.

Using AWS Amplify there are cases when you want to use different build settings per branch, however, as all the branches share the same build file, it could be somehow confusing.

Case

To go around that unique build file for all branches, we are using variables and if instructions, we ended up having a config like this for one of our projects.

Solution

frontend:
 phases:
  build:
   commands:    
    - if [ "${AWS_BRANCH}" = "production" ]; then ng build --configuration=production --prod --build-optimizer; fi
    - if [ "${AWS_BRANCH}" = "stage" ]; then ng build --configuration=stage --prod --build-optimizer; fi

this way we can have multiple environments, with different build instructions and different URLs, from multiples branches, using only one Amplify configuration.

Now, that works great on a single account environment or during Proof of Concepts, once is a real project, we would need different accounts for each environment, but that’s for another day.

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