apt-key output should not be parsed (stdout is not a terminal)

[dino99]

Got that warning logged after registering two ppas and updating them:

com.ubuntu.SoftwareProperties[2113]: gpg: keyring `/tmp/tmp58u008j4/secring.gpg' created
com.ubuntu.SoftwareProperties[2113]: gpg: keyring `/tmp/tmp58u008j4/pubring.gpg' created
com.ubuntu.SoftwareProperties[2113]: gpg: requesting key F59EAE4D from hkp server keyserver.ubuntu.com
com.ubuntu.SoftwareProperties[2113]: gpg: /tmp/tmp58u008j4/trustdb.gpg: trustdb created
com.ubuntu.SoftwareProperties[2113]: gpg: key F59EAE4D: public key "Launchpad PPA for NoobsLab" imported
com.ubuntu.SoftwareProperties[2113]: gpg: no ultimately trusted keys found
com.ubuntu.SoftwareProperties[2113]: gpg: Total number processed: 1
com.ubuntu.SoftwareProperties[2113]: gpg: imported: 1 (RSA: 1)
com.ubuntu.SoftwareProperties[2113]: Warning: apt-key output should not be parsed (stdout is not a terminal)
com.ubuntu.SoftwareProperties[2113]: OK
com.ubuntu.SoftwareProperties[2113]: gpg: keyring `/tmp/tmpjwlat63e/secring.gpg' created
com.ubuntu.SoftwareProperties[2113]: gpg: keyring `/tmp/tmpjwlat63e/pubring.gpg' created
com.ubuntu.SoftwareProperties[2113]: gpg: requesting key E2D0EBE9 from hkp server keyserver.ubuntu.com
com.ubuntu.SoftwareProperties[2113]: gpg: /tmp/tmpjwlat63e/trustdb.gpg: trustdb created
com.ubuntu.SoftwareProperties[2113]: gpg: key E2D0EBE9: public key "Launchpad PPA for RAVEfinity Project" imported
com.ubuntu.SoftwareProperties[2113]: gpg: Total number processed: 1
com.ubuntu.SoftwareProperties[2113]: gpg: imported: 1 (RSA: 1)
com.ubuntu.SoftwareProperties[2113]: Warning: apt-key output should not be parsed (stdout is not a terminal)
com.ubuntu.SoftwareProperties[2113]: OK

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: software-properties-gtk 0.96.24.1
ProcVersionSignature: Ubuntu 4.6.0-9.11-generic 4.6.4
Uname: Linux 4.6.0-9-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia
ApportVersion: 2.20.2-0ubuntu1
Architecture: amd64
CurrentDesktop: GNOME
Date: Sat Jul 23 13:37:35 2016
PackageArchitecture: all
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[era (era)]

apt-key was changed in Debian Stretch to warn when you attempt to do something like

    apt-key add <file >/dev/null

or the equivalent pipeline. The manual page says

COMMANDS
       add filename
(...)
           Note: Instead of using this command a keyring should be placed
directly in the /etc/apt/trusted.gpg.d/ directory with a descriptive name
and either "gpg" or "asc" as file extension.

So, the right thing to do is to copy the file to the right path instead of
calling apt-key add with it.

^ I got the above snippet from the very tangentially related https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=851774

[dino99 (9d9)]

Yakkety is now unsupported, and that issue is no more seen with recent releases.