A super quick and dirty script to draft a bunch of posts based on a certain tag.

draft_reblogs_from_tag.rb

require 'tumblr_client'

# Get dat Tumblr client
client = Tumblr::Client.new({
    consumer_key: 'CONSUMER_KEY',
  consumer_secret: 'CONSUMER_SECRET',
  oauth_token: 'OAUTH_TOKEN',
  oauth_token_secret: 'OAUTH_TOKEN_SECRET'
})

# Config your stuff here
tag = 'TAG_TO_REBLOG'
blog_url = 'YOUR_BLOG.tumblr.com' # or whatever CNAME you have set
tags_to_post = [
  'TAG_1',
  'TAG_2',
  'TAG_3'
]

# Form the comma separated string required to tag posts via the API
tags_to_post_str = tags_to_post.join(',')

# Get the initial tagged stuff
tagged = client.tagged(tag)
post = tagged.first

# Drafts 100 posts w/ the tag
5.times do
 tagged.each do |post|
    id = post['id']
    reblog_key = post['reblog_key']
    client.reblog(blog_url,
      id: id,
      reblog_key: reblog_key,
      state: 'draft',
      tags: tags_to_post_str
    )
  end
  last_timestamp = tagged.last['timestamp']
  tagged = client.tagged(tag,
    before: last_timestamp
  )
end