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 "$REV" ]
  12 }
  13
  14 try_git() {
  15         REBOOT=ee53a240ac902dc83209008a2671e7fdcf55957a
  16         git rev-parse --git-dir >/dev/null 2>&1 || return 1
  17
  18         [ -n "$GET_REV" ] || GET_REV="HEAD"
  19
  20         case "$GET_REV" in
  21         r*)
  22                 GET_REV="$(echo $GET_REV | tr -d 'r')"
  23                 BASE_REV="$(git rev-list ${REBOOT}..HEAD | wc -l | awk '{print $1}')"
  24                 REV="$(git rev-parse HEAD~$((BASE_REV - GET_REV)))"
  25                 ;;
  26         *)
  27                 BRANCH="$(git rev-parse --abbrev-ref HEAD)"
  28                 ORIGIN="$(git rev-parse --verify --symbolic-full-name ${BRANCH}@{u} 2>/dev/null)"
  29                 [ -n "$ORIGIN" ] || ORIGIN="$(git rev-parse --verify --symbolic-full-name master@{u} 2>/dev/null)"
  30                 REV="$(git rev-list ${REBOOT}..$GET_REV | wc -l | awk '{print $1}')"
  31
  32                 if [ -n "$ORIGIN" ]; then
  33                         UPSTREAM_BASE="$(git merge-base $GET_REV $ORIGIN)"
  34                         UPSTREAM_REV="$(git rev-list ${REBOOT}..$UPSTREAM_BASE | wc -l | awk '{print $1}')"
  35                 else
  36                         UPSTREAM_REV=0
  37                 fi
  38
  39                 if [ "$REV" -gt "$UPSTREAM_REV" ]; then
  40                         REV="${UPSTREAM_REV}+$((REV - UPSTREAM_REV))"
  41                 fi
  42
  43                 REV="${REV:+r$REV-$(git log --format="%h" -1)}"
  44                 ;;
  45         esac
  46
  47         [ -n "$REV" ]
  48 }
  49
  50 try_hg() {
  51         [ -d .hg ] || return 1
  52         REV="$(hg log -r-1 --template '{desc}' | awk '{print $2}' | sed 's/\].*//')"
  53         REV="${REV:+r$REV}"
  54         [ -n "$REV" ]
  55 }
  56
  57 try_version || try_git || try_hg || REV="unknown"
  58 echo "$REV"