sourceVersion is incorrect when running action on Pull Request

[pcarney8]

During execution a GitHub Pull Request runs as a detached head, causing the GITHUB_SHA version to not match the latest commit.

This value is then passed to CodeBuild and shows up as the "Resolved Source Version" when the correct value is in github.event.pull_request.head.sha

aws-codebuild-run-build/code-build.js

Line 117 in 9cc1fe9

const sourceVersion = process.env[`GITHUB_SHA`];

Trying to override GITHUB_SHA in the Run does not work. Could an override be added? Similar to the others?

[seebees]

I would like this to just work.
Rather than update this as an option,
I would rather just identify the condition and send this other value.

Some links:
https://github.community/t5/GitHub-Actions/GITHUB-SHA-but-how-to-get-the-latest-commit-reference-on-a/td-p/40873
https://help.github.com/en/actions/reference/events-that-trigger-workflows#pull-request-event-pull_request

As a followup question,
how are you injecting your AWS creds to Pull Requests?

[andres-lowrie]

so is there a release cycle cadence or something to subscribe to? (in regards to #40 getting merged in to master)

trying to get a sense of the project is all 😊