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#!/bin/bash

if [[ ( -z ${1+x} ) || ( -z ${2+x} ) ]]; then

cat << EOF

usage: $(basename "${0}") repo increment

Quick and dirty version bump script

If a variable "BUILD_VERSION" is set, returns that variable as is

If "BUILD_VERSION" is not set, returns the bumped version based on last existing tag

and appends .devN where N is the build number.

(tags get sorted using 'sort -V', nothing fancy here)

If no tags are present, the initial version will be 0.1.0

Expects arguments:

- repo: the relative/absolute path to the repository

- increment: (major|minor|patch) part of the version to INCREASE, default is patch

EOF

exit 1

fi

REPO_PATH=${1}

INCREASE=${2:patch}

function autoversion(){

if [ -n "${GITHUB_RUN_NUMBER+x}" ]; then

BUILD_NUMBER="${GITHUB_RUN_NUMBER}"

else

BUILD_NUMBER="0" # In the developer machine, this will build x.y.z.dev0

fi

cd "${REPO_PATH}" || exit 1

git fetch --tags 2>/dev/null

last_tag=$(git tag | sort -Vr | head -1)

# Catch existing no tags case

if [ -z "${last_tag}" ]; then

echo "0.1.0.dev${BUILD_NUMBER}"

else

a=( ${last_tag//./ } ) # replace points, split into array

case ${INCREASE} in

patch)

((a[2]++))

;;

minor)

((a[1]++))

a[2]=0

;;

major)

((a[0]++))

a[1]=0

a[2]=0

;;

esac

echo "${a[0]}.${a[1]}.${a[2]}.dev${BUILD_NUMBER}"

fi

}

if [ -n "${BUILD_VERSION+x}" ]; then

echo "${BUILD_VERSION}"

else

autoversion

fi