Deploy to AWS S3 only changed lambda functions

[Vipul_Panchal]

Hello, 

I am using serverless deploy to deploy my code to AWS S3. I want to deploy only changed lambda function using bitbucket pipelines not all the lambda functions.

How can I do this ?

[Vladimir Vlach]

We came up with the following step to build just changed folders in our monorepo:

Assuming the folder structure is:

- src/
 - folder1-etl-handler-py/
   - build.sh
 - folder2-etl-handler-py/
   - build.sh

- step:
    name: Build and package
    script:
      - apt-get update && apt-get install -y zip awscli
      - echo "Building and packaging lambda function in $AWS_DEFAULT_REGION"
      - git diff --name-only HEAD HEAD~1 | grep "src/folder1-etl-handler-py" && (cd src/folder1-etl-handler-py && ./deploy.sh)
      - git diff --name-only HEAD HEAD~1 | grep "src/folder2-etl-handler-py" && (cd src/folder2-etl-handler-py && ./deploy.sh)

[Vladimir Vlach]

@Halyna Berezovska your suggestion doesn't seem to answer @Vipul_Panchal question. If the repository has multiple functions how do you deploy those who has been affected.

[Halyna Berezovska]

@Vipul_Panchal you can use aws s3 sync command or just use the appropriate pipe (look at https://bitbucket.org/atlassian/aws-s3-deploy/src/master/)

[Vladimir Vlach]

Something similar to this https://semaphoreci.com/blog/continuous-integration-monorepos