scripts/getver.sh

   1 #!/usr/bin/env bash
   2 export LANG=C
   3 export LC_ALL=C
   4 [ -n "$TOPDIR" ] && cd $TOPDIR
   5
   6 GET_REV=$1
   7
   8 try_version() {
   9         [ -f version ] || return 1
  10         REV="$(cat version)"
  11         [ -n "$REV" ]
  12 }
  13
  14 try_git() {
  15         git rev-parse --git-dir >/dev/null 2>&1 || return 1
  16
  17         [ -n "$GET_REV" ] || GET_REV="HEAD"
  18
  19         case "$GET_REV" in
  20         r*)
  21                 GET_REV="$(echo $GET_REV | tr -d 'r')"
  22                 BASE_REV="$(git rev-list reboot..HEAD --count)"
  23                 REV="$(git rev-parse HEAD~$((BASE_REV - GET_REV)))"
  24                 ;;
  25         *)
  26                 UPSTREAM_BASE="$(git merge-base $GET_REV origin/master)"
  27                 UPSTREAM_REV="$(git rev-list reboot..$UPSTREAM_BASE --count)"
  28                 REV="$(git rev-list reboot..$GET_REV --count)"
  29                 if [ -n "$REV" -a -n "$UPSTREAM_REV" -a "$REV" -gt "$UPSTREAM_REV" ]; then
  30                         REV="r${UPSTREAM_REV}+$((REV - UPSTREAM_REV))"
  31                 else
  32                         REV="${REV:+r$REV}"
  33                 fi
  34                 ;;
  35         esac
  36
  37         [ -n "$REV" ]
  38 }
  39
  40 try_hg() {
  41         [ -d .hg ] || return 1
  42         REV="$(hg log -r-1 --template '{desc}' | awk '{print $2}' | sed 's/\].*//')"
  43         REV="${REV:+r$REV}"
  44         [ -n "$REV" ]
  45 }
  46
  47 try_version || try_git || try_hg || REV="unknown"
  48 echo "$REV"