Rename files in s3

rename.rb

# This is a modification of https://gist.github.com/voxxit/6c40a5583a2e3ff51dfa5725c069a830
# This is a quick script for doing a mass rename of all files in an Amazon S3 bucket.
# In this case, the rename operation was to unescape all filenames which had been 
# previously escaped in error.

#############################
# Configuration: 

bucketname = "the_incredible_bucket"
region = "region"

#############################

require "aws-sdk"

s3 = Aws::S3::Client.new(region: region)

objects = []
start_after = nil

loop do
  resp = s3.list_objects_v2(
    bucket: bucketname,
    max_keys: ENV.fetch("max_keys", 1000).to_i,
    start_after: start_after,
    prefix: ENV["prefix"]
  )

  objects += resp.contents
  start_after = resp.contents.last.key
  
  break if resp.is_truncated != true
end

objects.each do |object|
  if object.key =~ /funnyregex/
    print(object.key)
    print("\n")
    nkey = 'renamed_' + object.key
    #make a new object
    s3.copy_object(
      bucket: bucketname,
      copy_source: bucketname + "/" + object.key,
      key: nkey
    )
    #delete old object
    s3.delete_object(
      bucket: bucketname,
      key: object.key
    )
    print("################################\n")
    print("\n")
  end
end