Re: [Duplicity-talk] Why is duplicity asking for decryption passphrase on --encrypt-sign-key?

[Michael Gardner]

On Aug 1, 2017, at 11:17, edgar . soldin wrote:
> when you are doing an incremental, there is a chance that decryption is 
> needed 
> (updating the archive dir cache, resuming ...) so it will ask for the 
> passphrase.

I'm running duplicity incr as a cron job, and don't want to store the 
encryption passphrase. I can set a bogus value for PASSPHRASE, but then 
duplicity spits out an error message which triggers a cron mail, flooding my 
mailbox and obscuring real errors. Is there a way to make duplicity not prompt 
for a passphrase, and instead fail with an error message if it runs into a 
situation that would require one? Failing that, can I somehow suppress the "GPG 
Failed" error message without tossing everything from stderr into /dev/null?