version.sh

#!/usr/bin/env bash

# copy from github.com/kubernetes/kubernetes/hack/lib/version.sh

set -o errexit
set -o nounset
set -o pipefail

ROOT=$(dirname "${BASH_SOURCE[0]}")/..
GO_PACKAGE="redis-priv-operator"

getVersion() {
  if [[ '$Format:%%$' == "%" ]]; then
    GIT_COMMIT='$Format:%H$'
    GIT_TREE_STATE="archive"
    # When a 'git archive' is exported, the '$Format:%D$' below will look
    # something like 'HEAD -> release-1.8, tag: v1.8.3' where then 'tag: '
    # can be extracted from it.
    if [[ '$Format:%D$' =~ tag:\ (v[^ ,]+) ]]; then
      GIT_VERSION="${BASH_REMATCH[1]}"
    fi
  fi

  local git=(git --work-tree "${ROOT}")

  if [[ -n ${GIT_COMMIT-} ]] || GIT_COMMIT=$("${git[@]}" rev-parse "HEAD^{commit}" 2>/dev/null); then
    if [[ -z ${GIT_TREE_STATE-} ]]; then
      # Check if the tree is dirty.  default to dirty
      if git_status=$("${git[@]}" status --porcelain 2>/dev/null) && [[ -z ${git_status} ]]; then
        GIT_TREE_STATE="clean"
      else
        GIT_TREE_STATE="dirty"
      fi
    fi

    # Use git describe to find the version based on tags.
    if [[ -n ${GIT_VERSION-} ]] || GIT_VERSION=$("${git[@]}" describe --tags --abbrev=14 "${GIT_COMMIT}^{commit}" 2>/dev/null); then
      # This translates the "git describe" to an actual semver.org
      # compatible semantic version that looks something like this:
      #   v1.1.0-alpha.0.6+84c76d1142ea4d
      GIT_VERSION=$(echo "${GIT_VERSION}" | sed "s/-g\([0-9a-f]\{14\}\)$/+\1/")
      if [[ "${GIT_TREE_STATE}" == "dirty" ]]; then
        # git describe --dirty only considers changes to existing files, but
        # that is problematic since new untracked .go files affect the build,
        # so use our idea of "dirty" from git status instead.
        GIT_VERSION+="-dirty"
      fi


      # If GIT_VERSION is not a valid Semantic Version, then refuse to build.
      if ! [[ "${GIT_VERSION}" =~ ^v([0-9]+)\.([0-9]+)(\.[0-9]+)?(-[0-9A-Za-z.-]+)?(\+[0-9A-Za-z.-]+)?$ ]]; then
          echo "GIT_VERSION should be a valid Semantic Version. Current value: ${GIT_VERSION}"
          echo "Please see more details here: https://semver.org"
          exit 1
      fi
    fi
  fi
}


ldflag() {
  local key=${1}
  local val=${2}

  echo "-X '${GO_PACKAGE}/pkg/version.${key}=${val}'"
}

# Prints the value that needs to be passed to the -ldflags parameter of go build
# in order to set the Kubernetes based on the git tree status.
ldflags() {
  getVersion

  local buildDate=
  [[ -z ${SOURCE_DATE_EPOCH-} ]] || buildDate="--date=@${SOURCE_DATE_EPOCH}"
  local -a ldflags=($(ldflag "buildDate" "$(date ${buildDate} -u +'%Y-%m-%dT%H:%M:%SZ')"))
  if [[ -n ${KUBE_GIT_COMMIT-} ]]; then
    ldflags+=($(ldflag "gitCommit" "${GIT_COMMIT}"))
    ldflags+=($(ldflag "gitTreeState" "${GIT_TREE_STATE}"))
  fi

  if [[ -n ${GIT_VERSION-} ]]; then
    ldflags+=($(ldflag "gitVersion" "${GIT_VERSION}"))
  fi

  # The -ldflags parameter takes a single string, so join the output.
  echo "${ldflags[*]-}"
}

if [[ -z ${1:-} ]]; then
    ldflags
else
    getVersion
    echo ${!1}
fi