Missing git credentials pass-through for kustomize remotebases

[dan1el-k]

Checklist

• I've searched the issue queue to verify this is not a duplicate bug report.
• I've included steps to reproduce the bug.
• I've pasted the output of kargo version.
• I've pasted logs, if applicable.

Description

When using kustomize with a remoteBase targeting to a private repository (in our case Github Enterprise), credentials are needed for authentication. With ArgoCD repoServer as well as with local kustomize client, credentials are passed through
.
"kargo-render" howerver, do not pass through the credentials properly so that it prompts again for git credentials, even though they are provided from a credential store.

This results simply in failed promotions via Kargo Controller and an error message in the logs (see below).
When running kargo-render locally within a container it fails as well when no credentials are provided, but would succeed if they are provided a 2nd time as a user-input.

I understood that kargo-renders future is unknown, and it might end up fully in Kargo 0.9+, Therefore I want to highlight this bug here to be directly covered in the potentially integration, since we are heavily relying in using kustomize remotebases

Expected behavior:

Kargo/Kargo-render handles git credentials similar like ArgoCD does in order to support kustomize remote bases targeting private repositories

Screenshots

Steps to Reproduce

Example:

kargo-render.yaml

configVersion: v1alpha1
branchConfigs:
  - name: stage/kube1-dev
    appConfigs:
      mercury-argoevents: # source repo
        configManagement:
          path: applications/cortex-argoevents-manifest/stages/kube1-dev
        outputPath: mercury-argoevents
        combineManifests: true

kustomization

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization

resources:
  - https://my-company/my-org/cortex-argoevents-manifest.git//deployment?ref=HEAD
#  - ../../base
#  - ../../tests

local command

docker run -it ghcr.io/akuity/kargo-render:v0.1.0-rc.40  --repo https://my-company/my-org/mercury-manifest  --repo-username yyy   --repo-password xxx  --target-branch stage/kube1-dev

prompts for:

Username for 'https://code.rbi.tech': 

and if not provided it fails with error

Error: error pre-rendering manifests: error generating manifests using Argo CD repo server: `kustomize build /tmp/repo-311868286/repo/applications/cortex-argoevents-manifest/stages/kube1-dev` failed exit status 1: Error: accumulating resources: accumulating resources from 'https://my-company/my-org/cortex-argoevents-manifest.git//deployment?ref=HEAD': MalformedYAMLError: yaml: line 184: mapping values are not allowed in this context in File: https://my-company/my-org/cortex-argoevents-manifest.git//deployment?ref=HEAD

Version

version: 0.8.4

Logs

Paste any relevant application logs here.