if BUILD_GIT_REVISION=$(git rev-parse HEAD 2> /dev/null); then
  if [[ -z "${IGNORE_DIRTY_TREE}" ]] && [[ -n "$(git status --porcelain 2>/dev/null)" ]]; then
    BUILD_GIT_REVISION=${BUILD_GIT_REVISION}"-dirty"
  fi
else
  BUILD_GIT_REVISION=unknown
fi

# Check for local changes
tree_status="Clean"
if [[ -z "${IGNORE_DIRTY_TREE}" ]] && ! git diff-index --quiet HEAD --; then
  tree_status="Modified"
fi

# $1 = repo
function getSha() {
  local dir result
  dir=$(mktemp -d)
  git clone --depth=1 "https://github.com/istio/${1}.git" -b "${UPDATE_BRANCH}" "${dir}"

  result="$(cd "${dir}" && git rev-parse HEAD)"
  rm -rf "${dir}"

  echo "${result}"
}

  # Get trace ID from TRACEPARENT, if present
  local tid
  tid="$(<<<"${TRACEPARENT:-}" cut -d- -f2)"
  tid="${tid:-"$(tr -dc 'a-f0-9' < /dev/urandom | head -c 32)"}"
  # Always generate a new span ID
  local sid
  sid="$(tr -dc 'a-f0-9' < /dev/urandom | head -c 16)"

  # Execute the command they wanted with the propagation through TRACEPARENT
  if [[ $was_execution_trace == 1 ]]; then
    { set -x; } 2>/dev/null
  fi

SLEEP_TIME=60

printf "Verifying %s is available\n" "$ISTIO_ENVOY_RELEASE_URL"
until curl --output /dev/null --silent --head --fail "$ISTIO_ENVOY_RELEASE_URL"; do
    printf '.'
    sleep $SLEEP_TIME
done
printf '\n'

printf "Verifying %s is available\n" "$ISTIO_ENVOY_ARM_RELEASE_URL"
until curl --output /dev/null --silent --head --fail "$ISTIO_ENVOY_ARM_RELEASE_URL"; do
    printf '.'
    sleep $SLEEP_TIME
done
printf '\n'

SHA=$(grep "istio.io/api" go.mod | grep "^replace" | awk -F "-" '{print $NF}')
if [ -n "${SHA}" ]; then
  REPO=$(grep "istio.io/api" go.mod | grep "^replace" | awk '{print $4}')
else
  SHA=$(grep "istio.io/api" go.mod | head -n1 | awk '{ print $2 }')
  if [[ ${SHA} == *"-"* && ! ${SHA} =~ -rc.[0-9]$ && ! ${SHA} =~ -beta.[0-9]$ && ! ${SHA} =~ -alpha.[0-9]$ ]]; then
    # not an official release or release candidate, so get the commit sha