ensemble-transposer re-formats existing data so that it can be used by the Firefox Public Data Report.

Mozilla already publishes raw data: numbers and identifiers. That's great, but it can be difficult to work with. ensemble-transposer takes that raw data, organizes it, adds useful information like explanations, and generates a series of files that are much easier for developers to work with. Ensemble, the platform that powers the Firefox Public Data Report, uses this improved and re-formatted data to build dashboards.

Other applications are also welcome to use the data that ensemble-transposer outputs. See the API documentation for more information.

ensemble-transposer can easily enhance any data that adheres to this format. It can also process Redash dashboards (see this example configuration file). Let us know if you have any questions or if you have a dataset that you would like us to spruce up.

API

Re-formatted data is currently hosted under the data.firefox.com domain, but you are also welcome to run ensemble-transposer yourself and host the re-formatted data elsewhere.

• Valid platform values: desktop
• Valid datasetName values: hardware, user-activity, usage-behavior
• Valid categoryName values: Listed in the output of the /datasets/[platform]/[datasetName] endpoint
• Valid metricName values: Listed in the output of the /datasets/[platform]/[datasetName] endpoint

/datasets/[platform]/[datasetName]/index.json

For example: https://data.firefox.com/datasets/desktop/user-activity/index.json

A summary of the given dataset. For example, this includes a description of the dataset and a list of all metrics within it.

/datasets/[platform]/[datasetName]/[categoryName]/[metricName]/index.json

For example: https://data.firefox.com/datasets/desktop/user-activity/Italy/YAU/index.json

Everything you need to know about a given metric in a given category. For example, this includes a title, a description, and a set of suggested axis labels.

Development

Setup

1. Install Docker
2. Create a new Amazon S3 bucket
3. Copy .env-dist to .env and provide values for all environment variables

Inspecting output

Run make start and inspect that data that is uploaded to S3.

Testing

Run make test to lint code and run standard tests.

Run make compare to compare the data in your S3 bucket to the data in the production S3 bucket. This can be useful when upgrading packages or refactoring code, for example.

Deployment

This project is meant to be run as a cloud task, like a Lambda function or Google Cloud Function. The main function is specified as the value of main in package.json. Most services read this value and do the right thing. If not, you may need to manually point your service to that function.

Before triggering the function, be sure to create an Amazon S3 bucket and set the following environment variables:

• AWS_BUCKET_NAME
• AWS_REGION
• AWS_ACCESS_KEY_ID
• AWS_SECRET_ACCESS_KEY

Notes

Versioning

We maintain a version number for this project in package.json. It should be incremented whenever new code is pushed.

The number looks like a semantic version number, but semver isn't meant for applications. We instead follow these basic guidelines: the first number is incremented for major changes, the second number is incremented for medium-sized changes, and the third number is incremented for small changes.