#!/usr/bin/env bash

file=""
range=""
for i in "$@"
do
    # use '--' to separate file list and rev-list arguments
    test "$i" == '--' && shift && break
    file="$file"' '"$i"
    shift
done
test -n "$*" && range="$*"

test -z "$file" && echo "file required." 1>&2 && exit 1
if [ -z "$range" ]
then
    git filter-branch -f --index-filter "git rm -r --cached ""$file"" --ignore-unmatch" \
        --prune-empty --tag-name-filter cat -- --all
else
    # don't quote $range so that we can forward multiple rev-list arguments
    git filter-branch -f --index-filter "git rm -r --cached ""$file"" --ignore-unmatch" \
        --prune-empty --tag-name-filter cat -- $range
fi