#!/usr/bin/env bash
# pre-commit — fail if a newly-added article is not linked from SUMMARY.md.
# Bypass with `git commit --no-verify` if you genuinely need to.
set -euo pipefail

# Articles being added or renamed in this commit (excludes meta/index/README/SUMMARY/MajorWiki-Deploy-Status, and any */index.md).
added=$(git diff --cached --name-only --diff-filter=AR -- '*.md' \
  | grep -vE '^(README|index|SUMMARY|MajorWiki-Deploy-Status)\.md$|/index\.md$' \
  || true)

[ -z "$added" ] && exit 0

# Read the staged SUMMARY.md if it's part of the commit; otherwise the working-tree copy.
if git diff --cached --name-only | grep -q '^SUMMARY\.md$'; then
  summary=$(git show :SUMMARY.md)
else
  summary=$(cat SUMMARY.md)
fi

missing=()
while IFS= read -r article; do
  [ -z "$article" ] && continue
  if ! grep -qF -- "$article" <<<"$summary"; then
    missing+=("$article")
  fi
done <<<"$added"

if [ ${#missing[@]} -gt 0 ]; then
  echo "✗ pre-commit: new article(s) not linked from SUMMARY.md:" >&2
  printf '    %s\n' "${missing[@]}" >&2
  echo "" >&2
  echo "Add a SUMMARY.md entry for each, or use 'git commit --no-verify' to bypass." >&2
  exit 1
fi

exit 0