Tycho gpg plugin does not require keyring import when using tycho's signer 'bc'

In https://github.com/eclipse-cbi/jiro/wiki#required-steps-for-a-pipeline-job it is explained that the keyring has to be imported in the following way to use it with the maven-gpg-plugin:

                withCredentials([file(credentialsId: 'secret-subkeys.asc', variable: 'KEYRING')]) {
                    sh 'gpg --batch --import "${KEYRING}"'
                    sh 'for fpr in $(gpg --list-keys --with-colons  | awk -F: \'/fpr:/ {print $10}\' | sort -u); do echo -e "5\ny\n" |  gpg --batch --command-fd 0 --expert --edit-key ${fpr} trust; done'
                }

But at least when using the tycho-gpg-plugin with the bc signer it can be omitted and the keyring can be passed directly:

withCredentials([
    file(credentialsId: 'secret-subkeys.asc', variable: 'KEYRING'),
    string(credentialsId: 'gpg-passphrase', variable: 'KEYRING_PASSPHRASE')
]) {
    sh '''
        mvn clean verify -Dtycho.pgp.signer=bc -Dtycho.pgp.signer.bc.secretKeys="${KEYRING}" -Dgpg.passphrase="${KEYRING_PASSPHRASE}" -Dgpg.keyname="<your-keyname>"
    '''
}

eclipse-cbi / jiro

Tycho gpg plugin does not require keyring import when using tycho's signer 'bc' #396