re-apply-tags

#!/bin/bash

set -e

if [ ! $# -eq 2 ];
then
  echo "usage: $0 <src-repo> <dst-repo>"
  exit 1
fi

SRC_REPO=$1

DST_REPO=$2

if [ ! -d ${SRC_REPO} ];
then
  echo "can't find ${SRC_REPO}"
  exit 1
fi

if [ ! -d ${DST_REPO} ];
then
  echo "can't find ${DST_REPO}"
  exit 1
fi

cd ${SRC_REPO}
git tag -l | while read ;
do
  TAG_NAME="$REPLY"
  TAG_DATE=`git show --format=medium "$TAG_NAME" | head -5 | grep ^Date | cut -b9-`
  TAG_MSG=`git show --format=medium "$TAG_NAME" | head -5 | tail -1`
  TAG_COMMIT=`git show --format=medium "$TAG_NAME" | grep ^commit | cut -f2 -d' '`

  TAG_KEY=`git show --format=format:'tagkeydata!%aD!%ae' "$TAG_NAME" | grep ^tagkeydata`

  TAG_DOW=`echo "$TAG_DATE" | cut -f1 -d' '`
  TAG_MONTH=`echo "$TAG_DATE" | cut -f2 -d' '`
  TAG_DAY=`echo "$TAG_DATE" | cut -f3 -d' '`
  TAG_TIME=`echo "$TAG_DATE" | cut -f4 -d' '`
  TAG_YEAR=`echo "$TAG_DATE" | cut -f5 -d' '`
  TAG_OFFSET=`echo "$TAG_DATE" | cut -f6 -d' '`
  TAG_DATE2="${TAG_DOW}, $TAG_DAY $TAG_MONTH $TAG_YEAR $TAG_TIME $TAG_OFFSET"

  echo "$TAG_NAME"
  echo "$TAG_DATE2"
  echo "$TAG_MSG"
  echo "$TAG_KEY"

done | (

  cd "$DST_REPO"

  while read TAG_NAME;
  do
    read TAG_DATE2
    read TAG_MSG
    read TAG_KEY

    TAG_COMMIT=`git log --format=format:'tagkeydata!%aD!%ae!%H' | grep "^${TAG_KEY}" | cut -f4 -d'!' `

    faketime "$TAG_DATE2" git tag -s -m "$TAG_MSG" "$TAG_NAME" "$TAG_COMMIT"

  done

)