Script downloads all logs from aws cloudwatch logs

cloudwatch_logs_download.sh

#!/usr/bin/env bash
#
# Copyright 2015 Julian Meyer
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#  
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License. 
#
#
# Info: Script downloads all logs from aws cloudwatch logs
# Version: 0.1
#
# USE AT YOUR OWN RISK! 


# Settings START
LOGGROUPNAME="/aws/lambda/<functionname>"
AWS_REGION="eu-west-1"
STREAM_NAME_PREFIX="2015/05/05/"
LOGDIR="."
# Settings START


A_STEAM_NAME=()

get_steam_name (){
    if [ -n "$nextToken" ]; then
        WITH_nextToken="--next-token $nextToken"
        unset nextToken
    fi
    AWSOUTPUT=$( aws logs describe-log-streams --log-group-name $LOGGROUPNAME --region $AWS_REGION --limit 50 --log-stream-name-prefix $STREAM_NAME_PREFIX $WITH_nextToken | egrep 'nextToken|logStreamName' | awk '{print $1 $2}' | sed 's/[",]//g')

    for NAME in ${AWSOUTPUT//\\n/ }; 
    do         
        if [[ $NAME == *"nextToken"* ]]
        then
          nextToken=`echo $NAME | cut -d ":" -f2-`
          continue
        fi
        NAME=`echo $NAME | cut -d ":" -f2-` 

        A_STEAM_NAME+=($NAME);
    done
}

# Getting all Steam-Names's
get_steam_name
while [ -n "$nextToken" ]
do
    get_steam_name
done


for STREAMNAME in "${A_STEAM_NAME[@]}"
do
    FILENAME=`echo "$STREAMNAME.log" | sed 's/\//_/g'`
    aws logs get-log-events --region $AWS_REGION --log-group-name $LOGGROUPNAME --log-stream-name $STREAMNAME > $LOGDIR/$FILENAME;
done