apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: git-clone
  namespace: apps-build
spec:
  workspaces:
  - name: source
    description: The git repo will be cloned into the volume backing this workspace
    readOnly: false
  params:
  - name: repositoryurl
    description: git url to clone
    type: string
  - name: tag
    description: git tag if present
    type: string
    default: ""
  - name: revision
    description: git revision to checkout (branch, tag, sha, ref…)
    type: string
    default: main
  - name: branch
    description: git revision to checkout (branch, tag, sha, ref…)
    type: string
    default: main
  - name: submodules
    description: defines if the resource should initialize and fetch the submodules
    type: string
    default: "true"
  - name: depth
    description: performs a shallow clone where only the most recent commit(s) will be fetched
    type: string
    default: "1"
  - name: sslVerify
    description: defines if http.sslVerify should be set to true or false in the global git config
    type: string
    default: "false"
  - name: subdirectory
    description: subdirectory inside the "output" workspace to clone the git repo into
    type: string
    default: "src"
  - name: deleteExisting
    description: clean out the contents of the repo's destination directory (if it already exists) before trying to clone the repo there
    type: string
    default: "true"
  - name: gitInitImage
    description: The image used where the git-init binary is.
    default: "gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/git-init:v0.15.2"
    type: string
  results:
  - name: commit
    description: The precise commit SHA that was fetched by this Task
  - name: commitshashort
    description: The short version of the commit SHA that was fetched by this Task
  - name: built-image-tag
    description: The built image tag
  steps:
  - name: clone
    image: $(params.gitInitImage)
    script: |
      CHECKOUT_DIR="$(workspaces.source.path)/"

      cleandir() {
        # Delete any existing contents of the repo directory if it exists.
        #
        # We don't just "rm -rf $CHECKOUT_DIR" because $CHECKOUT_DIR might be "/"
        # or the root of a mounted volume.
        if [[ -d "$CHECKOUT_DIR" ]] ; then
          # Delete non-hidden files and directories
          rm -rf "$CHECKOUT_DIR"/*
          # Delete files and directories starting with . but excluding ..
          rm -rf "$CHECKOUT_DIR"/.[!.]*
          # Delete files and directories starting with .. plus any other character
          rm -rf "$CHECKOUT_DIR"/..?*
        fi
      }

      if [[ "$(params.deleteExisting)" == "true" ]] ; then
        cleandir
      fi

      REVISION=$(echo $(params.branch))
      REVISION_CLEAN="${REVISION#refs/heads/}"
      REVISION_CLEAN="${REVISION_CLEAN#refs/tags/}"
      TAG=$(echo $(params.tag))

      git clone "$(params.repositoryurl)" --recurse-submodules --depth 1 -b "$REVISION_CLEAN" "$CHECKOUT_DIR"

      cd "$CHECKOUT_DIR"
      RESULT_SHA="$(git rev-parse HEAD | tr -d '\n')"
      EXIT_CODE="$?"
      if [ "$EXIT_CODE" != 0 ]
      then
        exit $EXIT_CODE
      fi
      # Make sure we don't add a trailing newline to the result!
      echo -n "$RESULT_SHA" > $(results.commit.path)

      COMMIT_SHA_SHORT="$(git rev-parse --short HEAD | tr -d '\n')"
      echo -n "$COMMIT_SHA_SHORT" > $(results.commitshashort.path)

      BRANCH_NAME="$(echo $REVISION_CLEAN | sed 's/\//-/g')"

      if [ -z "${TAG##*refs/tags/*}"  ]
      then
        IMAGE_TAG=$(echo "$TAG" | cut -d '/' -f 3)
      else 
        IMAGE_TAG="${COMMIT_SHA_SHORT}"
      fi

      echo -n "$IMAGE_TAG" > $(results.built-image-tag.path)