replaced version-at-commit script with git-describe call

Makefile

@@ -1,5 +1,5 @@
 # Calculate version
-version = $(shell ./scripts/version-at-commit.sh)
+version = $(git describe --always --tags --dirty)
 
 rwildcard=$(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst *,%,$2),$d))
 

scripts/version-at-commit.sh

@@ -1,39 +0,0 @@
-#!/usr/bin/env bash
-
-set -e -o pipefail
-commit="$1"
-versionglob="v[0-9].[0-9]*.[0-9]*"
-devsuffix=".dev"
-if [ -z "$commit" ]; then
-  commit=`git log -n1 --first-parent "--format=format:%h"`
-fi
-
-# automatically assign version
-#
-# handles the following cases:
-#
-# 0. no tags on the repository. Print "dev".
-#
-# 1. no local modifications and commit is directly tagged. Print tag.
-#
-# 2. no local modifications and commit is not tagged. Take greatest version tag in repo X.Y.Z and assign X.Y.(Z+1). Print that + $devsuffix + $timestamp.
-#
-# 3. local modifications. Print "dev".
-
-tags=$(git tag)
-if [[ -z "$tags" ]]; then
-  echo "dev"
-elif `git diff --quiet 2>/dev/null`; then
-  tagged=$(git tag --points-at "$commit")
-  if [[ -n "$tagged" ]] ; then
-    echo $tagged
-  else
-    nearest_tag=$(git describe --tags --abbrev=0 --match "$versionglob" "$commit")
-    v=$(echo $nearest_tag | perl -pe 's/(\d+)$/$1+1/e')
-    isodate=$(TZ=UTC git log -n1 --format=%cd --date=iso "$commit")
-    ts=$(TZ=UTC date --date="$isodate" "+%Y%m%d%H%M%S")
-    echo "${v}${devsuffix}${ts}"
-  fi
-else
-  echo "dev"
-fi