Example Renovate customManager for kustomize

kustomize customManager renovate.json

// This is a example for a Renovate customManager to extract the kustomize version to compare with from its Github releases.
// Note the line with `extractVersionTemplate`, which is used to change the verson format what is used as the Github release versioning.

{
...
  "customManagers": [
    {
      "customType": "regex",
      "fileMatch": ["^Dockerfile$"],
      "matchStrings": ["ARG KUSTOMIZE_VERSION=(?<currentValue>.*?)\\n"],
      "extractVersionTemplate": "^kustomize/(?<version>.*)$",
      "depNameTemplate": "kubernetes-sigs/kustomize",
      "datasourceTemplate": "github-releases"
    }
  ]
...
}

z_Dockerfile

...

ARG KUSTOMIZE_VERSION=v4.5.7

curl -LsSf "https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2F${KUSTOMIZE_VERSION}/kustomize_${KUSTOMIZE_VERSION}_linux_amd64.tar.gz" | tar xz -C /usr/local/bin/ && \
chmod +x /usr/local/bin/kustomize

...