apiVersion: tekton.dev/v1
kind: Task
metadata:
  name: git-clone
  namespace: tekton-pipelines
  labels:
    app.kubernetes.io/version: "1.0"
spec:
  description: Clone a git repository using standard git
  workspaces:
    - name: output
      description: The git repo will be cloned onto the volume backing this Workspace.
  params:
    - name: url
      description: Repository URL to clone from.
      type: string
    - name: revision
      description: Revision to checkout (branch, tag, sha, ref).
      type: string
      default: "main"
    - name: depth
      description: Perform a shallow clone, fetching only the most recent N commits.
      type: string
      default: "1"
    - name: deleteExisting
      description: Clean out the contents of the destination directory if it already exists.
      type: string
      default: "true"
  results:
    - name: commit
      description: The precise commit SHA that was fetched by this Task.
    - name: url
      description: The precise URL that was fetched by this Task.
  steps:
    - name: clone
      image: alpine/git:latest
      script: |
        #!/bin/sh
        set -ex

        CHECKOUT_DIR="$(workspaces.output.path)"

        if [ "$(params.deleteExisting)" = "true" ] && [ -d "${CHECKOUT_DIR}" ]; then
          rm -rf "${CHECKOUT_DIR:?}/"* || true
          rm -rf "${CHECKOUT_DIR}"/.[!.]* || true
        fi

        cd "${CHECKOUT_DIR}"

        git clone --depth="$(params.depth)" --branch="$(params.revision)" \
          "$(params.url)" .

        RESULT_SHA="$(git rev-parse HEAD)"
        printf "%s" "${RESULT_SHA}" > "$(results.commit.path)"
        printf "%s" "$(params.url)" > "$(results.url.path)"

        echo "Cloned $(params.url) at ${RESULT_SHA}"