#!/usr/bin/env bash
export LANG=C
export LC_ALL=C
-[ -n "$TOPDIR" ] && cd $TOPDIR
+
+if [ -n "$TOPDIR" ]; then
+ cd "$TOPDIR" || exit 1
+fi
+
+SOURCE="${1:-.}"
try_version() {
- [ -f version.date ] || return 1
- SOURCE_DATE_EPOCH="$(cat version.date)"
+ [ -f "$SOURCE/version.date" ] || return 1
+ SOURCE_DATE_EPOCH=$(cat "$SOURCE/version.date")
[ -n "$SOURCE_DATE_EPOCH" ]
}
try_git() {
- [ -e .git ] || return 1
- SOURCE_DATE_EPOCH="$(git log -1 --format=format:%ct)"
+ SOURCE_DATE_EPOCH=$(git -C "$SOURCE" log -1 --format=format:%ct \
+ "$SOURCE" 2>/dev/null)
[ -n "$SOURCE_DATE_EPOCH" ]
}
try_hg() {
- [ -d .hg ] || return 1
- SOURCE_DATE_EPOCH=""
+ SOURCE_DATE_EPOCH=$(hg --cwd "$SOURCE" log --template '{date}' -l 1 \
+ "$SOURCE" 2>/dev/null | cut -d. -f1)
+ [ -n "$SOURCE_DATE_EPOCH" ]
+}
+
+try_mtime() {
+ SOURCE_DATE_EPOCH=$(perl -e 'print((stat $ARGV[0])[9])' "$0")
[ -n "$SOURCE_DATE_EPOCH" ]
}
-try_version || try_git || try_hg || SOURCE_DATE_EPOCH=""
+try_version || try_git || try_hg || try_mtime || SOURCE_DATE_EPOCH=""
echo "$SOURCE_DATE_EPOCH"