More intuitive appending of path parts to a URI in ruby.

uri_append_path.rb

require "uri"

# Appends path parts to URI in a similar way how File.join works.
# I.e. passing "https://example.com/a", "/b", "c", "d/e/" will result in 
# <URI::HTTPS https://example.com/a/b/c/d/e>
# while the result of URI.join will be:
# <URI::HTTPS https://example.com/d/e/>
# 
# See https://ruby-doc.org/stdlib-2.5.1/libdoc/uri/rdoc/URI.html#method-c-join
# See https://www.honeybadger.io/blog/why-is-uri-join-so-counterintuitive/
def uri_append_path(uri, *join_parts)
  uri_obj = URI(uri)
  path_parts = ([uri_obj.path] + join_parts).flat_map { |part| part.split("/") }.reject(&:empty?)
  URI.join(uri_obj, "/", path_parts.join("/"))
end

module URI
  class Generic
    def append_path(*join_parts)
      path_parts = ([path] + join_parts).flat_map { |part| part.split("/") }.reject(&:empty?)
      URI.join(self, "/", path_parts.join("/"))
    end
  end
end