DMPServer Bash Updater

#!/bin/bash

# LICENSE: SEE http://forum.kerbalspaceprogram.com/threads/92665-DMP-Linux-Server-Tools

# Config
. /etc/dmpserver/dmpserver.cfg

# Lib
. /var/lib/dmpserver/dmpbashlib


# Check for root
rootCheck


## Hash Functions

function buildHashList(){
    curr_hash=()

    echo "Building Hash List"
    h=0
    for name in ${name_list[@]} ; do
        curr_hash[$h]=$(sha256sum $DMPBIN/$name | awk -F " " '{print $1}')
        ((h++))
    done
}

function checkFileFreshness(){
    diff_res=()

    echo "Getting File Freshness"
    h=0
    for hash in ${curr_hash[@]} ; do
        diff <(echo $hash) <(echo ${hash_list[$h]}) &> /dev/null
        diff_res[$h]="$?"
        ((h++))
    done
}


## Functions
function dmpDirExists(){
    dirExistTest $DMPBIN
    if [ $RETVAL == "False" ] ; then
        echo -e "${formatWarn}'$DMPBIN' does not exist! Please install with DMP Linux Tools,${formatEnd}"
        echo -e "${formatWarn}create the directory with the proper permissions, or modify the${formatEnd}"
        echo -e "${formatWarn}DMP binary install directory.${formatEnd}"
        exit 2
    fi
}

function buildTargetLists(){
    echo "Generating Target Lists"
    getTargetNames $REPOindex
    name_list=("${RETVAL[@]}")
    getTargetHashes $REPOindex
    hash_list=("${RETVAL[@]}")
}

function checkTargetInstall(){
    echo "Generating Missing Files"
    for name in ${name_list[@]} ; do
        fileExistTest $DMPBIN/$name
        if [ ! $RETVAL == "True" ] ; then
            # Make Missing File
            echo "Adding missing file $name"
            touch $DMPBIN/$name
        fi
    done
}

function updateOutdatedFiles(){
    echo
    echo
    echo "Beginning DMPServer Update."
    echo

    environment_dirs=`ls -l --time-style="long-iso" $DMPDIR | egrep '^d' | awk '{print $8}'`
    for env_dir in $environment_dirs ; do
        dmpserver $env_dir stop-fast
    done


    findex=0
    for res in ${diff_res[@]} ; do
        if [ $res -eq 1 ];
        then
            echo "Updating ${name_list[$findex]}..."
            curl --progress-bar $REPOobj/${hash_list[${findex}]} > $DMPBIN/${name_list[${findex}]}
            echo -e "${name_list[${findex}]} Update is ${formatDone} DONE ${formatEnd}"
        elif [ $res -eq 0 ];
        then
            echo -e "File ${name_list[${findex}]} is ${formatDone}up-to-date${formatEnd}."
        else
            echo "Something went wrong when updating! diff gave exit code of: $res ."
            echo "Updater was expecting a 0 (up-to-date) or a 1 (out-of-date)."
        fi
        ((findex++))
    done


    echo "Updating DMPServer environment links."

    for env_dir in $environment_dirs ; do
        dmpenv update $env_dir
        dmpserver $env_dir start
    done


    echo
    echo "DMPServer Update Completed."
}


## Execution
dmpDirExists

buildTargetLists

checkTargetInstall

buildHashList

checkFileFreshness

updateOutdatedFiles