tools/v8-rolls.sh

#!/bin/bash
# Copyright 2013 the V8 project authors. All rights reserved.
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########## Global variable definitions

DEPS_STRING='"v8_revision":'
INFO=tools/v8-info.sh

V8="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

########## Function definitions

usage() {
cat << EOF
usage: $0 OPTIONS

Run in chromium/src to get information about V8 rolls.

OPTIONS:
  -h    Show this message.
  -n    Number of rolls to print information about.
  -s    Chromium git hash to start printing V8 information about.
EOF
}

v8_line() {
  git show $1:DEPS | grep -n $DEPS_STRING | cut -d":" -f1
}

v8_info() {
  git blame -L$(v8_line $1),+1 $1 DEPS | grep $DEPS_STRING
}

v8_svn() {
  sed -e 's/^.*"\([0-9]\+\)",$/\1/'
}

v8_roll() {
  cut -d" " -f1
}

find_rev() {
  git svn find-rev $1
}

msg() {
  msg=$(git log --format="%h %ci %ce" -1 $1)
  h=$(echo $msg | cut -d" " -f1)
  d=$(echo $msg | cut -d" " -f2)
  t=$(echo $msg | cut -d" " -f3)
  a=$(echo $msg | cut -d" " -f5)
  a1=$(echo $a | cut -d"@" -f1)
  a2=$(echo $a | cut -d"@" -f2)
  echo $h $d $t $a1@$a2
}

v8_revision() {
  cd $V8
  $INFO -v $1
}

rolls() {
  roll=$2
  for i in $(seq 1 $1); do
    info=$(v8_info $roll)
    roll=$(echo $info | v8_roll $roll)
    trunk=$(echo $info | v8_svn $roll)
    echo "$(v8_revision $trunk) $trunk $(find_rev $roll) $(msg $roll)"
    roll=$roll^1
  done
}

########## Option parsing

REVISIONS=1
START=HEAD

while getopts ":hn:s:" OPTION ; do
  case $OPTION in
    h)  usage
        exit 0
        ;;
    n) REVISIONS=$OPTARG
        ;;
    s) START=$OPTARG
        ;;
    ?)  echo "Illegal option: -$OPTARG"
        usage
        exit 1
        ;;
  esac
done

rolls $REVISIONS $START