Add: Add version.sh

Author: coord-e

version.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+#
+# Copyright 2018 coord.e
+#
+# This file is part of servoarray.
+#
+# servoarray is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# servoarray is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with servoarray.  If not, see <http://www.gnu.org/licenses/>.
+#
+# This script prints semver-compatible version string calculated from current state of git
+
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+function detailed() {
+  local annotated=$(git describe --tags --abbrev=0 2> /dev/null)
+  local description=$(git describe --always)
+  local replaced=${description/${annotated}-/${annotated}+}
+  local semver=${replaced#v}
+  echo $semver
+}
+
+function simple() {
+  local annotated=$(git describe --tags --abbrev=0 2> /dev/null)
+  echo ${annotated#v}
+}
+
+${1:-detailed}