Unzip epub file into a directory of the same base name

epubopen.sh

#! /bin/bash

# =======================================================================
#
# Unzips epub file into a directory with the same basename.
# If the directory exists, abort.
#
# To invoke, type:
#   $ epubopen.sh filename.epub
#
# =======================================================================

# Changelog
#----------------------------------------------------------------------
#
# v.0.1 (2017-08-27) by milkfarm
#   - original version

# Functions
# -----------------------------------------------------------------------

error () {
  echo "! Error: $*"
  exit 1
}

# Parameters
# -----------------------------------------------------------------------

source=$1
base=`basename $source`
target=${base%%.*}

# Test
# -----------------------------------------------------------------------

if [ ! -f "$source" ]; then
  error "File does not exist: $source"
fi

if [ -d "$target" ]; then
  error "Directory already exists: $target"
fi

# Main
# -----------------------------------------------------------------------

mkdir -v "$target"
unzip -d "$target" "$source"