scripts/get_source_date_epoch.sh

   1 #!/usr/bin/env bash
   2 export LANG=C
   3 export LC_ALL=C
   4
   5 if [ -n "$TOPDIR" ]; then
   6         cd "$TOPDIR" || exit 1
   7 fi
   8
   9 try_version() {
  10         [ -f version.date ] || return 1
  11         SOURCE_DATE_EPOCH="$(cat version.date)"
  12         [ -n "$SOURCE_DATE_EPOCH" ]
  13 }
  14
  15 try_git() {
  16         [ -e .git ] || return 1
  17         SOURCE_DATE_EPOCH="$(git log -1 --format=format:%ct)"
  18         [ -n "$SOURCE_DATE_EPOCH" ]
  19 }
  20
  21 try_hg() {
  22         [ -d .hg ] || return 1
  23         SOURCE_DATE_EPOCH="$(hg log --template '{date}' -l 1 | cut -d. -f1)"
  24         [ -n "$SOURCE_DATE_EPOCH" ]
  25 }
  26
  27 try_mtime() {
  28         SOURCE_DATE_EPOCH=$(perl -e 'print((stat $ARGV[0])[9])' "$0")
  29         [ -n "$SOURCE_DATE_EPOCH" ]
  30 }
  31
  32 try_version || try_git || try_hg || try_mtime || SOURCE_DATE_EPOCH=""
  33 echo "$SOURCE_DATE_EPOCH"