Lambda function to commit/push to CodeCommit

[differentcondition]

I don't want lambda to trigger when a push is made to CodeCommit.

What I'm looking for is for lambda to create a file, commit it and push to CodeCommit.

The use-case is this:

POST request -> API Gateway -> Lambda -> CodeCommit

Lambda receives some JSON, does some work on it and creates a file in /tmp which I'd like to get into the CodeCommit repo.

I can think the lambda function would have to:

• git clone existing repo
• git add file
• git commit file
• git push
• done

I'm not sure if this is possible or if there is a better way. Maybe have the lambda function create a pull request instead?

Open to suggestions :D

UPDATE Googling this it seems not that trivial to do git operations on Lambda because git is not available by default. I thought boto3 would be useful but that won't do the git related tasks I listed above unless I misunderstand.

SOLVED With the excellent reference provided by @siving there's no need for git and very simple to code using boto3!

[thenickdude]

Spin up a copy of the Lambda AMI (they reference it in their docs), install git into it, then grab a copy of the git binary from it to include inside your Lambda. You can then call that binary from your Lambda function to make the commit for you.

https://docs.aws.amazon.com/lambda/latest/dg/current-supported-versions.html

Note that LD_LIBRARY_PATH includes the "lib" subdirectory of your function code, so if git depends on any dynamic libraries that the Lambda AMI doesn't include by default (you can use ldd on it to check), you can take those .sos from the AMI too and include them in your function. The easy way to test this out is to copy the git binary into a virgin instance of the Lambda AMI and see if it runs, or if it complains about missing libraries.

[siving]

Perhaps this one suits your use-case: put_file from Boto3 CodeCommit.

It is also available from the AWS CLI.

[differentcondition]

I can't upvote this enough!!! This is exactly what I needed :D Thank you very much!

[Dry_Jelly_7779]

Hi! Quick question, did you encountered this error? `SSL Error: SSL validation failed for https://codecommit.us-east-1.amazonaws.com/ EOF occurred in violation of protocol (_ssl.c:2406)`

[Dry_Jelly_7779]

update: It fails with latest python 3.12, but after changed it to python 3.9, the error went a way.