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A "warning" is shown when a process has been completed but it did not go as expected. Warnings should be output with "stderr". Warnings should include a clear reason why the warning has occuredoccurred.
Failure
A "failure" should be shown if a process cannot be completed. Details about the failure should follow the main failure statement. Failures should be output with "stderr".
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We should always indicate that progress is being made so the user knows a process has not stalled. Progress indicators should only be included for TTY sessions (not in output) and can be turned off with the --progress-enabled=false flag. The progress indicator should appear on a new line below the last line of information. Once the process is complete, the progress indicator will move down to the next empty line. A progress indicator is not needed if a process takes less than a second.
