terraform providers --help

[mountaing]

Check for updates to the options: https://www.terraform.io/docs/commands/index.html

Usage: terraform providers [dir]

  Prints out a tree of modules in the referenced configuration annotated with
  their provider requirements.

  This provides an overview of all of the provider requirements across all
  referenced modules, as an aid to understanding why particular provider
  plugins are needed and why particular versions are selected.