claws-mail/get-git-version

#!/bin/sh
if test -d .git; then
  git=`command -v git`
  if test -x "$git"; then
    version=`git describe --abbrev=6 --dirty --always`
    echo "echo $version" > ./version
  else
    echo "Error: *** git not found. See http://git-scm.com/"
    exit 1
  fi
elif test -s ./version; then
  version=`sh -c ". ./version"`
else
  echo "Error: *** invalid tree. Neither '.git' nor 'version' were found"
  exit 1
fi
echo -n $version