tagas.sh

#!/bin/bash
# Made by st0rmis
# Get the last tag, increment major, minor or patch version and push it

declare -a valid_versions=('major' 'minor' 'patch')

CURTAG=`git fetch --tags && git tag -l --sort=-creatordate | head -1`
CURTAG="${CURTAG/v/}"

IFS='.' read -a vers <<< "$CURTAG"

MAJ=${vers[0]}
MIN=${vers[1]}
PATCH=${vers[2]}

array_contains()
{
  for element in "${valid_versions[@]}"; do
    if [[ $element = "$@" ]]; then
      echo "Returns 1"
      return 1
    fi
  done
  echo "Returns 0"
  return 0
}

if [ $# -ne 1 ] || array_contains $@ ; then
  printf "Current tag: $CURTAG\nValid flags:\n
  \tmajor - Change first digit ($(($MAJ+1)).0.0)\n
  \tminor - Change second digit ($MAJ.$(($MIN+1)).0)\n
  \tpatch - Change last digit ($MAJ.$MIN.$(($PATCH+1)))\n
    " >&2
  exit 1
fi

echo "Current Tag: $MAJ.$MIN.$PATCH"

for cmd in "$@"
do
  case $cmd in
    "major")
      ((MAJ+=1))
      MIN=0
      PATCH=0
      echo "Incrementing Major Version"
      ;;
    "minor")
      ((MIN+=1))
      PATCH=0
      echo "Incrementing Minor Version"
      ;;
    "patch")
      ((PATCH+=1))
      echo "Incrementing Patch Version"
      ;;
  esac
done

NEWTAG="$MAJ.$MIN.$PATCH"
echo "Adding tag: $NEWTAG"

git tag $NEWTAG && git push --tags