#!/usr/bin/env bash

set -e

#
## Given version, this script creates & pushes a relevant git-tag.
#

# required version
VERSION=$1

# Verify version to-be-released is provided
if [[ -z "$VERSION" ]]; then
  >&2 printf "\nERR: version missing:  version needs to be passed as the first argument.  Try:\n"
  >&2 printf "\t./%s  %s\n\n"   "$(basename "$0")"  "v0.19.1"
  exit 1
fi

# Get directory
DIR="$(echo "${VERSION#v}" | cut -d. -f-2)"

# Verify there's no uncommitted changes in the working dir
if [[ -n "$(git status --untracked-files=no --porcelain)" ]]; then
  >&2 printf "\nERR: working directory not clean.  Commit, or stash changes to continue.\n\n"
  exit 1
fi

if ! grep -q "${VERSION#v}" "$DIR/Dockerfile" ; then
  >&2 printf "\nERR: Requested version not present in Dockerfile. Make sure that's what you want to do.\n\n"
  exit 1
fi

git fetch --tags

# Get last build number
LAST="$(git tag | grep '+build' | sed 's|^.*build||' | sort -h | tail -n 1)"
LAST="${LAST:-0}"

# Increment it
((LAST++))


TAG="$VERSION+build$LAST"

printf "Creating tag: %s…\t" "$TAG"

git tag -sa "$TAG" -m "$TAG"

echo "done"


printf "Pushing tag: %s…\t" "$TAG"

git push origin "$TAG"

echo "All done"