argocd-helmfile

#!/bin/bash

## standard build environment
## https://argoproj.github.io/argo-cd/user-guide/build-environment/
# ARGOCD_APP_NAME - name of application
# ARGOCD_APP_NAMESPACE - destination application namespace.
# ARGOCD_APP_REVISION - the resolved revision, e.g. f913b6cbf58aa5ae5ca1f8a2b149477aebcbd9d8
# ARGOCD_APP_SOURCE_PATH - the path of the app within the repo
# ARGOCD_APP_SOURCE_REPO_URL the repo's URL
# ARGOCD_APP_SOURCE_TARGET_REVISION - the target revision from the spec, e.g. master.
# KUBE_VERSION="<major>.<minor>"
# KUBE_API_VERSIONS="v1,apps/v1,..."

set -e

if [ "${ARGOCD_CMP_HELMFILE_DEBUG}" == "true" ] ; then
  set -x
fi

cleanup() {
  if [[ "${ARGOCD_ENV_ADDITIONAL_VALUES}" ]] ; then
    rm -r $tmpfile
  fi
}

trap "cleanup" ERR

echoerr() { printf "%s\n" "$*" >&2; }

# exit immediately if no phase is passed in
if [[ -z "${1}" ]]; then
  echoerr "invalid invocation"
  exit 1
fi

SCRIPT_NAME=$(basename "${0}")

phase=$1

# setup the env
helm="$(which helm)"
helmfile="$(which helmfile)"
helmfile="${helmfile} --helm-binary ${helm} --no-color --allow-no-matching-release"

if [[ "${ARGOCD_APP_NAMESPACE}" ]]; then
  helmfile="${helmfile} --namespace ${ARGOCD_APP_NAMESPACE}"
fi

if [[ "${HELMFILE_GLOBAL_OPTIONS}" ]]; then
  helmfile="${helmfile} ${HELMFILE_GLOBAL_OPTIONS}"
fi

# these should work for both v2 and v3
helm_full_version=$(${helm} version --short --client | cut -d " " -f2)
helm_major_version=$(echo "${helm_full_version%+*}" | cut -d "." -f1 | sed 's/[^0-9]//g')
helm_minor_version=$(echo "${helm_full_version%+*}" | cut -d "." -f2 | sed 's/[^0-9]//g')

# fix scenarios where KUBE_VERSION is improperly set with trailing +
# https://github.com/argoproj/argo-cd/issues/8249
KUBE_VERSION=$(echo "${KUBE_VERSION}" | sed 's/[^0-9\.]*//g')

echoerr "$(${helm} version --short --client)"
echoerr "$(${helmfile} --version)"

case $phase in
  "init")
    echoerr "starting init"
    if [[ ! -d "./charts" ]]; then
      echoerr "no charts directory found, doing helmfile fetch"
      ${helmfile} fetch
    fi
    ;;

  "generate")
    echoerr "starting generate"

    INTERNAL_HELM_TEMPLATE_OPTIONS=
    HELM_VALUES_FILE=

    # support added for --kube-version in 3.6
    # https://github.com/helm/helm/pull/9040
    if [[ ${helm_major_version} -eq 3 && ${helm_minor_version} -ge 6 && "${KUBE_VERSION}" ]]; then
      INTERNAL_HELM_TEMPLATE_OPTIONS="${INTERNAL_HELM_TEMPLATE_OPTIONS} --kube-version=${KUBE_VERSION}"
    fi

    if [[ ${helm_major_version} -eq 3 && "${KUBE_API_VERSIONS}" ]]; then
      INTERNAL_HELM_API_VERSIONS=""
      for v in ${KUBE_API_VERSIONS//,/ }; do
        INTERNAL_HELM_API_VERSIONS="${INTERNAL_HELM_API_VERSIONS} --api-versions=$v"
      done
      INTERNAL_HELM_TEMPLATE_OPTIONS="${INTERNAL_HELM_TEMPLATE_OPTIONS} ${INTERNAL_HELM_API_VERSIONS}"
    fi

    if [[ "${ARGOCD_ENV_ADDITIONAL_VALUES}" ]] ; then
      echoerr "Detected additional values"
      tmpfile=$(mktemp /tmp/helmfile-additional-values-XXXXXX)
      echo "${ARGOCD_ENV_ADDITIONAL_VALUES}" > $tmpfile
      HELM_VALUES_FILE="--values ${tmpfile}"
    fi

    ${helmfile} \
      template \
      --skip-deps \
      --args "${INTERNAL_HELM_TEMPLATE_OPTIONS}" \
      ${HELM_VALUES_FILE}

    cleanup
    ;;

  *)
    echoerr "invalid invocation"
    exit 1
    ;;
esac