#!/usr/bin/env bash
# Reject commits containing Go files that aren't gofmt-formatted.
set -euo pipefail

files="$(git diff --cached --name-only --diff-filter=ACM | grep '\.go$' || true)"

if [ -z "$files" ]; then
    exit 0
fi

unformatted="$(gofmt -l $files)"

if [ -n "$unformatted" ]; then
    echo "gofmt: the following files are not formatted:"
    echo "$unformatted"
    echo
    echo "Run 'gofmt -w <file>...' and re-stage before committing."
    exit 1
fi