1#!/usr/bin/env bash
2export LANG=C
3export LC_ALL=C
4[ -n "$TOPDIR" ] && cd $TOPDIR
5
6try_version() {
7	[ -f version ] || return 1
8	REV="$(cat version)"
9	[ -n "$REV" ]
10}
11
12try_svn() {
13	[ -d .svn ] || return 1
14	REV="$(svn info | awk '/^Last Changed Rev:/ { print $4 }')"
15	REV="${REV:+r$REV}"
16	[ -n "$REV" ]
17}
18
19try_git() {
20	[ -d .git ] || return 1
21	REV="$(git log | grep -m 1 git-svn-id | awk '{ gsub(/.*@/, "", $0); print $1 }')"
22	REV="${REV:+r$REV}"
23	[ -n "$REV" ]
24}
25
26try_hg() {
27	[ -d .hg ] || return 1
28	REV="$(hg log -r-1 --template '{desc}' | awk '{print $2}' | sed 's/\].*//')"
29	REV="${REV:+$REV}"
30	[ -n "$REV" ]
31}
32
33try_version || try_svn || try_git || try_hg || REV="unknown"
34echo "$REV"
35