Sync 2 files between different git repos with blob object #script #git #sync

sh

#!/usr/bin/env bash

target=$(cd $(dirname $1) && git rev-parse --show-toplevel)
cd $target
file=${1#$target/}
anchor=$(git rev-parse HEAD:$file)

cd $2
if ! git cat-file -e $anchor 2>/dev/null; then
  echo $anchor not found
  exit 1
fi

git log --pretty=format:'%h %T' \
| while read commit tree; do
  if git ls-tree -r $tree | grep -q $anchor; then
    break
  fi
  echo $commit $(git ls-tree -r $tree | grep $3 | awk '{print $3}')
done | tac | uniq -f1 \
| while read commit blob; do
  git cat-file -p $blob > $target/$file && (cd $target; git add $file)
  git cat-file -p $commit | sed 1,5d | tee /dev/tty | ( cd $target; git commit -F - )
done