Chronicle-ETL allows you to extract personal data from a variety of services, transformer it, and load it.

gem install chronicle-etl -v 0.1.2



Chronicle ETL is a utility tool for manipulating personal data. You can extract it from a variety of source, transform it, and load it to different APIs or file formats.


$ gem install chronicle-etl


After installing the gem, chronicle-etl is available to run in your shell.

chronicle-etl --extractor csv --extractor-opts filename:test.csv --loader table
cat test.csv | chronicle-etl --extractor csv --loader table

Full usage

  chronicle-etl help [COMMAND]  # Describe available commands or one specific command
  chronicle-etl job             # Runs an ETL job

Job options

  chronicle-etl job

  -e, [--extractor=extractor-name]      # Extractor class (available: stdin, csv, file)
                                        # Default: stdin
      [--extractor-opts=key:value]      # Extractor options
  -t, [--transformer=transformer-name]  # Transformer class (available: null)
                                        # Default: null
      [--transformer-opts=key:value]    # Transformer options
  -l, [--loader=loader-name]            # Loader class (available: stdout, csv, table)
                                        # Default: stdout
      [--loader-opts=key:value]         # Loader options
  -j, [--job=JOB]                       # Job configuration file

Runs an ETL job


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Chronicle::Etl project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.