A simple shell script for packaging epubs

epub: epubpack

#!/usr/bin/env bash
 
#
# A simple shell script for packaging epubs.
#
 
epub_dir="${1}"       # required
epub_filename="${2}"  # optional
 
 
function package_epub {
    # get inside the epub directory and package it there
    root=${1}
    name=$(basename ${root})
 
    # get inside the epub directory and package it there
    cd ${root}
 
    if [[ -z ${2} ]]; then
        # use directory name as epub filename
        # if preferred name is not defined
        epub_file=${name}.epub
    else
        epub_file=${2}
    fi
 
    if [[ -f ${epub_file} ]]; then
        # remove old epub
        rm -f ${epub_file}
    fi
 
    if [[ ! -f mimetype ]]; then
        # create mimetype if missing
        echo "application/epub+zip" > mimetype
    fi
 
    # http://www.webvivant.com/zipping-epub-files.html
    zip -j -X -0 -m ${epub_file} mimetype
    zip -r -g -9 ${epub_file} *
 
    echo "Done packaging epub: ${epub_file}"
}
 
 
if [[ -z ${epub_dir} ]]; then
    echo "Please specify an epub directory as the first argument"
elif [[ -d ${epub_dir} ]]; then
    package_epub ${epub_dir} ${epub_filename}
else
    echo "epub directory not found or is not a directory"
fi