1#!/usr/bin/env bash
2export LANG=C
3export LC_ALL=C
4[ -n "$TOPDIR" ] && cd $TOPDIR
5
6try_version() {
7	[ -f version.date ] || return 1
8	SOURCE_DATE_EPOCH="$(cat version.date)"
9	[ -n "$SOURCE_DATE_EPOCH" ]
10}
11
12try_svn() {
13	[ -d .svn ] || return 1
14	SOURCE_DATE_EPOCH="$(./scripts/portable_date.sh "$(LC_ALL=C svn info | sed -ne 's/^Last Changed Date: //p')" +%s)"
15	[ -n "$SOURCE_DATE_EPOCH" ]
16}
17
18try_git() {
19	[ -e .git ] || return 1
20	SOURCE_DATE_EPOCH="$(git log -1 --format=format:%ct)"
21	[ -n "$SOURCE_DATE_EPOCH" ]
22}
23
24try_hg() {
25	[ -d .hg ] || return 1
26	SOURCE_DATE_EPOCH=""
27	[ -n "$SOURCE_DATE_EPOCH" ]
28}
29
30try_version || try_svn || try_git || try_hg || SOURCE_DATE_EPOCH=""
31echo "$SOURCE_DATE_EPOCH"
32