#!/usr/bin/env bash
#
# Copyright 2014 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# Generate version information

if ghash=$(git rev-parse --short=12 --verify HEAD 2>/dev/null); then
  if gdesc=$(git describe --dirty --match='v*' 2>/dev/null); then
    IFS="-" fields=($gdesc)
    tag="${fields[0]}"
    IFS="." vernum=($tag)
    numcommits=$((${vernum[2]}+${fields[1]:-0}))
    ver_major="${vernum[0]}"
    ver_branch="${vernum[1]}"
  else
    numcommits=$(git rev-list HEAD | wc -l)
    ver_major="v0"
    ver_branch="0"
  fi
  # avoid putting the -dirty attribute if only the timestamp
  # changed
  dirty=$(sh -c "[ '$(git diff-index --name-only HEAD)' ] \
                && echo '-dirty'")
  ver="${ver_major}.${ver_branch}.${numcommits}-${ghash}${dirty}"
else
  ver="unknown"
fi

echo "const char futility_version[] = \"${ver}\";";