+#! /bin/bash
+# bootstrap -- Use this script to create generated files from a VCS checkout
+#
+
+version=
+
+if [ "$1" ]; then
+ version=$1
+elif head=$(git rev-parse --short --verify HEAD 2>/dev/null); then
+
+ # If available, use the git commit revision for the package version.
+
+ # Add a date prefix for easy reading.
+ # date='2010-11-30 16:36:09 -0800'
+
+ date=$(git log --pretty=format:"%ci" -1 HEAD)
+ date=${date##20}
+ date=${date%%:[0-9][0-9] *}
+ date=${date//-/.}
+ date=${date// /.}
+ date=${date//:/.}
+
+ version=$(printf '%s-%s%s' ${date} g ${head})
+
+ # Add a '-dirty' postfix for uncommitted changes.
+
+ if git diff-index HEAD | read dummy; then
+ version=`printf '%s%s' ${version} -dirty`
+ fi
+else
+ # Default to current date and time.
+
+ version="dev-$(date +%y.%m.%d-%H.%M.%S)"
+fi
+
+set -x
+
+sed -e s,@version@,${version},g configure.ac.in > configure.ac