nordic-epub3-dtbook-migrator-update-snapshot.sh

#!/bin/bash -x

SNAPSHOTS="https://dl.dropboxusercontent.com/u/6370535/nordic-epub3-dtbook-migrator"

INSTALLED="`ls ~/daisy-pipeline/modules/ | grep nordic-epub3-dtbook-migrator | grep jar$`"

CURRENT="`curl $SNAPSHOTS/current.txt`"
if [ "$?" -ne "0" ]; then
    echo "Could not retrieve filename of current version of the Nordic EPUB3/DTBook Migrator"

elif [ "$CURRENT" = "$INSTALLED" ]; then
    echo "Most recent version of Nordic EPUB3/DTBook Migrator is already installed"

else
    echo "Installed version: $INSTALLED"
    echo "Current version: $CURRENT"
    echo "Retrieving current version..."
    wget $SNAPSHOTS/builds/$CURRENT -O ~/daisy-pipeline/modules/$CURRENT
    if [ "$?" = "0" ]; then
        echo "Current version successfully retrieved"
        if [ -f "$HOME/daisy-pipeline/modules/$INSTALLED" ]; then
            echo "Deleting old version..."
            rm ~/daisy-pipeline/modules/$INSTALLED
        fi
    else
        echo "Could not successfully retrieve current version"
        if [ -f "$HOME/daisy-pipeline/modules/$CURRENT" ]; then
            echo "Deleting remnants of failed download..."
            rm ~/daisy-pipeline/modules/$CURRENT
        fi
    fi
fi