This is a follow on to a previous question:

Part 3: User Scripts

All the code I am submitting here is available in github

The reason to write these tools is so I can prototype and quickly verify that I am doing things correctly before implementing them in C++. This is mainly necessary because the documentation these scripts are based on are relatively bad and confusing.

The scripts used by users:

s3cp

#!/usr/bin/env bash  badflag=0 declare -a ARGS  function usage {     echo "Usage:"     echo "s3cp  <file> <s3-url> [--key=<key>] [--secret=<secret>] [--verbose] [--dryrun]"     echo "s3cp  <s3-url> <file> [--key=<key>] [--secret=<secret>] [--verbose] [--dryrun]"     echo     echo "s3-url:  s3://<bucket>/<Object-Path>"     exit 1 }  verbose='' dryrun=0 access=$  {AMZ_ACCESS_KEY} secret=$  {AMZ_SECRET_KEY} for var in "$  @"; do     if [[ "$  {var}" == '--verbose' ]]; then         verbose='/dev/stdout'         continue     fi     if [[ "$  {var}" == '--dryrun' ]]; then         dryrun=1         continue;     fi     if [[ "$  {var%=*}" == "--key" ]]; then         access=$  {var#*=}         continue;     fi     if [[ "$  {var%=*}" == "--secret" ]]; then         secret=$  {var#*=}         continue;     fi     flag=$  {var#-}     if [[ "$  {flag}" != $  {var} ]]; then         badflag=1         echo "Bad flag: $  {var}"         continue     fi     ARGS+=("$  var") done  if [[ "$  {access}" == "" || "$  {secret}" == "" ]]; then     echo "Error: No Access or Secret provided."     echo "These can be set in the environment variables AMZ_ACCESS_KEY/AMZ_SECRET_KEY or passed with flags"     usage fi  if [[ $  {#ARGS[@]} != 2 || $  {badflag} != 0 ]]; then     usage fi  src=$  {ARGS[0]} dst=$  {ARGS[1]}  doUpload=0 doDownload=0 srcS3=$  {src#s3://} if [[ "$  {src}" == "$  {srcS3}" ]]; then     doUpload=1 fi dstS3=$  {dst#s3://} if [[ "$  {dst}" == "$  {dstS3}" ]]; then     doDownload=1 fi  if [[ $  {doUpload} == 0 && $  {doDownload} == 0 ]]; then     echo "Neither source or destination is on S3. Just use normal cp"     usage fi if [[ $  {doUpload} == 1 && $  {doDownload} == 1 ]]; then     echo "Both source or destination is on S3. Don't support move yet."     usage fi  dir="$  (cd "$  (dirname "$  {BASH_SOURCE[0]}")" && pwd)" source $  {dir}/s3/signature   if [[ $  {doUpload} == 1 ]]; then     source $  {dir}/s3/upload     upload "$  {src}" "$  {dst}" "$  {access}" "$  {secret}" '' "$  {verbose}" "$  {dryrun}" else     source $  {dir}/s3/download     download "$  {src}" "$  {dst}" "$  {access}" "$  {secret}" '' "$  {verbose}" "$  {dryrun}" fi