tools/graft-old-history.sh

#!/bin/sh
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URL=git://repo.or.cz/jgit.git
PRE=3a2dd9921c8a08740a9e02c421469e5b1a9e47cb
POST=1a6964c8274c50f0253db75f010d78ef0e739343

GIT_DIR=$(git rev-parse --git-dir) &&
grafts="$GIT_DIR/info/grafts" &&

if grep $PRE "$grafts" >/dev/null 2>/dev/null
then
  echo 'Graft already installed; doing nothing.' >&2
else
  git remote add old-jgit "$URL" &&
  git fetch old-jgit &&
  echo $POST $PRE >>"$GIT_DIR/info/grafts" &&
  echo 'Graft installed.' >&2
fi