./generate-sha1.sh BUCKET_NAME RELEASE_VERSION

generate-sha1.sh

#!/bin/bash -e

S3_BUCKET=$1
RELEASE_VERSION=$2

readonly S3_BUCKET_FOLDER='downloads'

sync_get_release_files_from_s3(){

   # sync locally only ${RELEASE_VERSION} files from downloads
   echo "****"
   echo "Get files from S3 bucket $S3_BUCKET_PATH..."
   echo "****"
   aws s3 sync s3://${S3_BUCKET}/${S3_BUCKET_FOLDER}/ ./downloads --exclude "*" --include "*${RELEASE_VERSION}*"

}

sync_push_files_to_s3(){

   # push sha1 files to S3
   echo "****"
   echo "Push .sha1 files..."
   echo "****"
   aws s3 sync --dryrun ./downloads s3://${S3_BUCKET}/${S3_BUCKET_FOLDER}/  --exclude "*" --include "*${RELEASE_VERSION}*.sha1"

}


docker_s3_access(){
    echo " (command $1)"
    docker run --rm --user 1000:1000  -v $(pwd):/srv:rw --workdir /srv \
        -e AWS_ACCESS_KEY_ID="${AWS_ACCESS_KEY_ID}" \
        -e AWS_SECRET_ACCESS_KEY="${AWS_SECRET_ACCESS_KEY}" \
        -e AWS_DEFAULT_REGION=us-west-2 \
        jess/awscli "$1" 
}

# generate SHA1 files for each artifacts that have a SHA512 files
generate_sha1_files(){

    echo "****"
    echo "Generate .sha1 files..."
    echo "****"
    # for each .sha512 files, generate a .sha1 file from the related source archive
    FILES=$(find downloads -type f -name '*.sha512')

    for f in $FILES ; 
    do 
        if [[ -f "${f%.sha512}" ]];
        then
            # generate sha1 hash
            hash=$(shasum -a 1  "${f%.sha512}" | awk 'NR==1 { print $1 }')

            # write sha1 content to .sha1 file
            if [[  $? ]] && [[  -n "${hash}"  ]]; then
              echo "$hash" > "${f%.sha512}.sha1"
            fi
            if [ -f "${f%.sha512}.sha1" ];
            then
                echo "SHA1 file generated for ${f%.sha512}"
            fi
        else
            echo "ERROR: ${f%.sha512} doesn't exist, can't generate SHA1 file."    
        fi
    done  
}


### MAIN

# all sync and generated files will be sored in this folder
mkdir -p downloads

# get files from S3
sync_get_release_files_from_s3

# generate missing .sha1 files
generate_sha1_files

# push .sha1 files to S3
sync_push_files_to_s3