scripts/get_source_date_epoch.sh

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