Honden: A Flashcard System Built on Oboeta
This is a collection of scripts built on top of Oboeta, my minimalistic flashcard system. All cards are stored as plain UTF-8 text in flat files: associated media files are stored in subdirectories.
Open a terminal, navigate to the directory containing Honden's source code, and execute the
install.sh script, passing the directory where you want to install the scripts as the first parameter. For example,
$ ./install.sh ~/flashcards
will copy the scripts to
~/flashcards. You might have to change users (e.g., run
sudo) depending on which installation directory you select.
Creating a Deck
Most Honden scripts use information stored within a configuration file named
config.txt, which is nothing more than a Bourne shell script that sets environment variables. Most of the values are easy to understand.
config.txt, create a new directory, navigate to it, and run
honden. This will also create the directory hierarchy described in the next section. NOTE:
honden will overwrite
config.txt if it already exists but it won't overwrite the directories.
The scripts assume that the deck and log files are formatted according to Oboeta's guidelines. The default deck settings assume that each card has four fields: the card's unique integral ID, the card's creation date, the front, and the back. You can specify different filters in
config.txt if your card format is different.
The Directory Hierarchy
config.txt, the directory hierarchy looks like this:
./ backups/ This directory contains backup archives created by backupall and backupcards. These are bzipped TARs (.tar.bz2). media/ recordings/ flashcards/ This directory contains recordings of flashcards. Each recording's name is the integral ID of the associated flashcard followed by the .wav extension. If there are multiple recordings for a single flashcard, then the first one is named as just mentioned, whereas subsequent recordings' names are the flashcard's unique ID followed by ".N", where N is the recording's zero-based index, and the .wav extension. sds/ This directory contains Chinese character stroke order diagrams. Each file's name is the character that the file describes followed by an image extension. Right now, all of my diagrams are PNGs. other/ This directory contains miscellaneous data. Honden ignores it.
Most of the scripts use the Bourne shell (
uniq utilities. All of them should be easy to understand: Open them with your favorite text editor to check them out. Here's a high-level overview of the most important ones:
backupcardsback up all files or just cards, respectively, to the
edeckedits the deck with your favorite text editor.
seedeckviews the deck with your favorite viewer.
nextidscans the decks and its log file for the next unique integral flashcard ID.
genlineis a handy script that appends new cards generated from its parameters to the deck. It automatically generates the cards' unique IDs.
reviewuses SM-2 to select flashcards from the deck and sets up a local HTTP server on port 1337 to review them.
defaultfilteris the filter that
config.txtspecifies by default to transform
oboeta's output into something that
oboetahttpcan consume. (
All of the files in this collection have been dedicated to the public domain via the Creative Commons CC0 Public Domain Dedication in the hope that they would be circulated widely and without restriction. I won't make any money from this code and I feel that it's more important that other people are free to use, modify, and distribute it as they please, with or without charge, even if I could make money from this. Simply put, I like contributing to a healthy public domain. See the file
COPYING for a complete copy of the public domain dedication.
I wrote these scripts by myself primarily for myself, but I hope that others will find them useful.
-- Joodan Van (伴上段), 2012年11月22日