#!/bin/sh

# expects a filter file of syntax like filter-index

export filterfile="$1"
git filter-branch --remap-to-ancestor --prune-empty --index-filter '
	xargs -0r git filter-index < "$filterfile"
' -- --all
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 -r git update-ref -d || true
git reflog expire --expire=now --all
git gc --prune=now --aggressive