bash.d/.claude/hooks/shellcheck-on-edit.sh

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#!/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