list files that tests don't require, one file at a time

deadfiles.sh

#!/bin/env bash

set -uf -o pipefail

if [ -n "$(git status --porcelain)" ]; then
    echo "git status is not clean"
    exit 1
fi

if [ $# -eq 0 ]; then
    echo "usage: $0 command"
    exit 1
fi

echo "checking command ..."
if ! time eval "$*"; then
    echo "command failed with no file changes"
    exit 1
fi

for file in $(git ls-files | shuf | grep -Ev '^test/|^\.git'); do
    echo "$file ..."
    rm "$file"
    if eval "$*"; then
        echo "*** $file wasn't necessary"
    fi
    git checkout "$file" --quiet
done

usage.sh

../deadfiles.sh docker-compose exec -T app lein with-profile +app bat-test | tee ../dead.txt