Since the TSLintFixTask can take a lot of time (e.g. if used to apply source code transformations for ng-update), it would be nice to have a progress indicator that shows that "something" actually runs.

For example: if someone runs ng update @angular/material@next, it's not clear for a period of time that the fix task actually "runs". See: angular/components#12774.

An option that can be specified when configuring the TSlintFixTask would be nice to have. The option would then show a simple progress indicator while TSLint runs.

Ideally there would be a way for a schematic to:

• Have an progress-spinner with a name of the schematic currently running
• Report a status (similar to how Bazel repository_ctx can report statuses)

Nowadays a lot of schematics need to run as part of an ng update and it would be helpful to know what schematic currently runs / what it currently does (if known)

cc. @jelbourn