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 | wc -l)"
  23                 REV="$(git rev-parse HEAD~$((BASE_REV - GET_REV)))"
  24                 ;;
  25         *)
  26                 BRANCH="$(git rev-parse --abbrev-ref HEAD)"
  27                 ORIGIN="$(git rev-parse --symbolic-full-name ${BRANCH}@{u} 2>/dev/null)"
  28                 [ -n "$ORIGIN" ] || ORIGIN="$(git rev-parse --symbolic-full-name master@{u} 2>/dev/null)"
  29                 REV="$(git rev-list reboot..$GET_REV | wc -l | awk '{print $1}')"
  30
  31                 if [ -n "$ORIGIN" ]; then
  32                         UPSTREAM_BASE="$(git merge-base $GET_REV $ORIGIN)"
  33                         UPSTREAM_REV="$(git rev-list reboot..$UPSTREAM_BASE | wc -l | awk '{print $1}')"
  34                 else
  35                         UPSTREAM_REV=$REV
  36                 fi
  37
  38                 if [ "$REV" -gt "$UPSTREAM_REV" ]; then
  39                         REV="${UPSTREAM_REV}+$((REV - UPSTREAM_REV))"
  40                 fi
  41
  42                 REV="${REV:+r$REV}"
  43                 ;;
  44         esac
  45
  46         [ -n "$REV" ]
  47 }
  48
  49 try_hg() {
  50         [ -d .hg ] || return 1
  51         REV="$(hg log -r-1 --template '{desc}' | awk '{print $2}' | sed 's/\].*//')"
  52         REV="${REV:+r$REV}"
  53         [ -n "$REV" ]
  54 }
  55
  56 try_version || try_git || try_hg || REV="unknown"
  57 echo "$REV"