commit_book.sh

#!/usr/bin/env bash

set -euo pipefail

origin=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd) || exit

new_books=$(cd "${origin}/content/book" && git ls-files -o --exclude-standard --full-name)

extract_metadata() {
  metadata=$(grep "^${1}:\ *" < "${2}")
  metadata="${metadata#"${1}: "}"
  echo "${metadata//\"/}"
}

for book in ${new_books}; do
  title=$(extract_metadata "title" "${book}")
  author=$(extract_metadata "author" "${book}")
  isbn=$(extract_metadata "isbn" "${book}")
  git add "${book}"
  git add "${origin}/content/cover/${isbn}."*

  commit_msg="[book][${isbn}] \"${title}\" by \"${author}\""

  # use book read date as Git author date (not committer date on purpose)
  book_read_date=$(grep "read_date" "${book}" | cut -d' ' -f2 -f3) || book_read_date=$(date "+%Y-%m-%d")
  git commit --date="${book_read_date}" -m "${commit_msg}"
done