This Action will generate a output variable that can be used to generate a dynamic matrix job.

This is often need for repos that contain many apps, here are a few examples:

• Terraform Infrastructure: At my current job we have a single repo with all of our cloud infrastructure. Each folder is deployed individually, so being able to detect what folders have been changed can build a matrix for each terraform plan command.

• ArgoCD: This is a single repo with all of our ArgoCD apps. Each folder is deployed individually, so being able to detect what folders have been changed can build a matrix for each ArgoCD command.

• Helm chart: At my current job we have a collection of generic helm charts. Each folder is a chart that is individually deployed, tagged, and released.

This action is based on a quick POC in KyleJamesWalker/action-playground PR#3 and expands on a command like:

# Github Command
$ gh pr view 3 --repo KyleJamesWalker/action-playground --json files --jq '.files.[].path' | cut -d "/" -f1 | grep -v '[\\|\.]' | sort | uniq | jq  --raw-input .

# Example Output
"example_1"
"example_2"

• kylejameswalker/pr-changes-matrix-builder-pytest 308MB
• kylejameswalker/pr-changes-matrix-builder 254MB