Scripted algorithm to generate version tag names.

This can be used in order to render names according to a pattern.

generate-version-tag-name.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+# This script shall print a string to stdout that can directly be used as a tag name for versioning.
+
+echo "INFO: Call this script like this: $0 4 3 2 alpha"
+
+# read arguments
+majorOffset=$1
+minorOffset=$2
+patchOffset=$3
+masterPostfix=$4
+
+gitInfo=`git describe --tags --always --match "v[[:digit:]]*"`
+rawBranchName=`git symbolic-ref --short HEAD`
+branchName="${rawBranchName/\//-}"
+
+# truncate leading `v`
+oldVersionString=${gitInfo:1}
+
+# separate version information
+IFS=- # delimit on _
+set -f # disable the glob part
+oldVersionInfo=(${oldVersionString}) # invoke the split+glob operator
+IFS=
+
+commits=${oldVersionInfo[1]}
+object=${oldVersionInfo[2]}
+
+# separate version numbers
+IFS=. # delimit on _
+set -f # disable the glob part
+oldVersionNumbers=(${oldVersionInfo[0]}) # invoke the split+glob operator
+IFS=
+
+major=$((${oldVersionNumbers[0]}+$majorOffset))
+minor=$((${oldVersionNumbers[1]}+$minorOffset))
+patch=$((${oldVersionNumbers[2]}+$patchOffset))
+
+if [ "$branchName" == "master" ]; then
+	if [ "$masterPostfix" == "" ]; then
+		postfix=""
+	else
+		postfix="-$masterPostfix"
+	fi
+else
+	postfix="-0.develop+$branchName.$commits.$object"
+fi
+
+version="$major.$minor.$patch$postfix"
+
+# Tags which point to defined versions shall use the version name prefixed with a `v` as this is [common practice](https://github.com/semver/semver/issues/235#issuecomment-346477428) on GitHub.
+tag="v$version"
+echo ${tag}