I'm trying to setup build triggers on GCP but I'm finding that the $REPO_NAME variable they provide when configuring your image name is a bit counter-intuitive. Rather than it being the actual repository name, they include both the Git provider (in my case Github) and the organisation name, like so: github-[organisation]-[repo]

Does anyone know a way I can just have the repository name? Ideally, my final GCR image would be at:

gcr.io/[gcp-project]/[repo-name-as-appears-on-github]:[tag-number]