version

#!/bin/bash

# Version script for dcos-migration
#
# Change MINOR to x+1 and BRANCH_POINT to commit hash of common ancestor of master and releases/1.x
# after a releases/1.x was cut
MAJOR=0
MINOR=1
BRANCH_POINT=d6ce4319ab6659237faf1fa07850d14274c73ab0
REF=HEAD

declare -a OTHERARGS
help() {
  cat <<-EOF
Usage $0 [options]

  --help This help
  --ref  The reference for which version to output Defaults to HEAD

Non-arg params

* commit - output just the formatted commit hash
* version - output just the version, without the hash
* package - output the version with the commit hash, ie 1.9.34-a122edcb4

EOF
}

while ! [ -z "$1" ]; do
  arg="$1"
  shift
  case "$arg" in
    --help)
      help
      exit 0
      ;;
    --ref)
      REF="$1"
      shift
      ;;
    *)
      OTHERARGS+=("$arg")
      ;;
  esac
done

# Infer version
# Number of commits since branch point
COMMIT_NUMBER="$(git rev-list --count --first-parent $BRANCH_POINT..$REF)"
COMMIT_HASH=$(git rev-parse --short $REF)

case ${OTHERARGS[0]} in
  commit)
    # Echo commit hash
    echo "$COMMIT_HASH"
    ;;
  version)
    # Echo package version plus hash
    echo "$MAJOR.$MINOR.$COMMIT_NUMBER"
    ;;
  "" | package)
    # Echo package version plus hash
    echo "$MAJOR.$MINOR.$COMMIT_NUMBER-$COMMIT_HASH"
    ;;
  *)
    echo "ERROR: ${OTHERARGS[0]} is not a version format"
    echo
    help
    exit 1
    ;;


esac