bash_helpers.sh

#!/usr/bin/env bash


DATE=`date +%Y-%m-%d--%H-%M-%S`
MAINDIR=`pwd`

THIS_SHELL_FILE_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

function simLink() {
	local destFile=$1
	local soruceFile=$2

	if [ -L ${destFile} ];
	then
		echo ">> File '${destFile}' is EXISTS ... will do nothing"
	else
		if [ -f ${destFile} ];
		then
			echo ">> ERROR! >> File ${destFile} is EXISTS! and this is regular"
			exit;
		else
			ln -s ${soruceFile} ${destFile}
			echo ">> File '${destFile}' Created as symLink of '${2}'"
		fi
	fi
}

# use:
# $ defaultVal nameOfvar defaultValue
function defaultVal() {
	local varname=$1
	local defValue=$2

	if [ -z "${!varname}" ]; then
		eval $varname="$defValue"
	fi
}


function readWithDefault() {
	local message=$1
	local varname=$2
	local defaultValue=$3
	local val

	echo -n ${message}
	read val
	if [ -z "$val" ]; then
		val=${defaultValue}
	fi
	eval $varname="$val"
}

function checkGoodEndOfPriviousCommand() {
    local errorCode=$1
    if [ "$?" -ne "0" ]; then
        killall ssh
    	exit $errorCode
    fi
}

function killSshTunnel() {
    local port=$1

    local sshPid=`ps aux | fgrep "L$port" | fgrep -v grep | awk '{print $2}'`
    if [[ -n "${sshPid}" ]]; then
       kill -9 ${sshPid}
    fi
}

function sshProxyConnectWithRemoteServer() {
    local sshProxyKey=$1
    local sshProxyPort=$2
    local sshProxyUser=$3
    local sshProxyHost=$4

    local sshServerHost=$5
    local sshServerKey=$6
    local sshServerUser=$7
    local sshServerPath=$8

    killSshTunnel $sshProxyPort

    # echo ">>> Start Tunnel"
    ssh -v -o StrictHostKeyChecking=no -i $sshProxyKey -L$sshProxyPort:$sshServerHost:22 -N -f $sshProxyUser@$sshProxyHost
    checkGoodEndOfPriviousCommand 1

    # echo ">>> Test Connection"
    ssh -v -p $sshProxyPort -o StrictHostKeyChecking=no -i $sshServerKey $sshServerUser@localhost "test -d $sshServerPath || mkdir -p $sshServerPath"
    checkGoodEndOfPriviousCommand 1
}

function uploadOneFileToServer() {
    local localPath=$1
    local remotePath=$2
    
    local $sshPort=$3
    local $sshServerKey=$4
    local $serverUser=$5

    # echo ">>> Uploading $(basename ${localPath})"
    scp -q -P $sshPort -i $sshServerKey $localPath $serverUser@localhost:$remotePath
    checkGoodEndOfPriviousCommand 1
}

function downloadOneFileFromServer() {
    local localPath=$1
    local remotePath=$2
    
    local $sshPort=$3
    local $sshServerKey=$4
    local $serverUser=$5

    # echo ">>> Download $(basename ${localPath})"
    scp -q -P $sshPort -i $sshServerKey $serverUser@localhost:$remotePath $localPath
    checkGoodEndOfPriviousCommand 1
}