1. Extract out into several methods.
2. Add more comments describing the data and the shape of the data.

Still need final links all over the place.

This table shows the percentage of users who registered in the last
twelve months, who last signed in during or later than each of those
twelve months, by month.

It is only enabled when the usage ping is enabled, and the page also
shows pretty-printed usage ping data.

The cohorts table is generated in Ruby from some basic SQL queries,
because performing the gap-filling and running sums needed in both MySQL
and Postgres is painful.

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

This new class uses a Redis Hash instead of a Sorted Set.
Signed-off-by: Rémy Coutable <remy@rymai.me>

CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/962

Refactored specs and added a post deployment migration to remove the activity users table.

It uses a user activity table instead of a column in users.
Tested with mySQL and postgreSQL

CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1521

This query is constantly generating timeout errors on large installations and we don't
have a simple solution for now and also we don't think having this counter is
really critical.

CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/735

CE port of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/557

Revert "Merge branch 'grpc-1.2.2' into 'master'"

See merge request !10700

Update show.html.haml to allow guests to see the Files tab as per #30199

See merge request !10640

Implement Users::BuildService

Closes #30349

See merge request !10675

Closes #28531 - Enable the import_url field.

Closes #28531

See merge request !9438

Expand components version specification format to allow branches

Closes gitaly#183

See merge request !10610

This reverts merge request !10589

Improve error messages when a record is unable to be created for a project

See merge request !10696

Allow to enable `rspec_profiling` for a branch on the CI

Closes #30907

See merge request !10680