#!/bin/bash
# PostToolUse hook: run shellcheck after editing a bash.d script.
# Skips non-script files (markdown, .gitignore, etc).

set -euo pipefail

input=$(cat)
file_path=$(echo "$input" | jq -r '.tool_input.file_path // empty')

# No file path — nothing to check
[[ -z "$file_path" ]] && exit 0

basename=$(basename "$file_path")

# Only check files that match the numbered script naming convention
# or .example templates (which are also valid shell scripts)
case "$basename" in
    [0-9][0-9]-*|[0-9][0-9]-*.example) ;;
    *) exit 0 ;;
esac

# File must still exist (Write could have been to a new path)
[[ -f "$file_path" ]] || exit 0

# Run shellcheck — exit 2 feeds stderr back to Claude
if ! shellcheck "$file_path" 2>&1; then
    echo "shellcheck failed on $basename — please fix the issues above" >&2
    exit 2
fi

exit 0