Boilerplate script for automating git-filter-repo

filter_repo.sh

#!/usr/bin/env bash

set -e

shopt -s globstar

github_user="FIXME"
orig_repo="FIXME"
new_repo="FIXME"
branch="main"

files=(
  FIXME
)

args=()

for path in "${files[@]}"; do
	args+=(--path "$path")
done

git clone "https://github.com/${github_user}/${orig_repo}.git" "$new_repo"
cd "$new_repo"/
git checkout "$branch"
git filter-repo --force "${args[@]}" --tag-rename '':"${orig_repo}-"
git branch -D main || true
git branch -m main
git tag "$orig_repo"
git remote add origin "git@github.com:${github_user}/${new_repo}.git"

and if you want to get a list of every file that ever existed in the git repo, and grep through them for the file/dir names you want to save:

git log --pretty=format:" " --name-only | sort -u | egrep "(name1|name2|...)"