[Java] java-android-clean-build - generating of keystores/truststores breaks the maven build

[rendner]

The script docker/joynr-android/scripts/build/java-android-clean-build runs with set -e, which means exit immediately if a command exits with a non-zero status. Running this script again, without deleting the keystores/truststores, will generate the following error and abort the whole script:

keytool error: java.lang.Exception: Certificate not imported, alias <mykey> already exists

Therefore it isn't possible to do a clean maven build again with the current implementation.

Another problem with the keytool part in this script is, that the following lines:

• joynr/docker/joynr-android/scripts/build/java-android-clean-build

  Line 45 in d65b7d8

  keytool -importkeystore -srckeystore catruststore.jks -srcstorepass $KEYSTORE_PASSWORD -destkeystore catruststore.p12 -deststorepass $KEYSTORE_PASSWORD -srcstoretype JKS -deststoretype PKCS12

• joynr/docker/joynr-android/scripts/build/java-android-clean-build

  Line 51 in d65b7d8

  keytool -importkeystore -deststorepass $KEYSTORE_PASSWORD -destkeypass $KEYSTORE_PASSWORD -destkeystore clientkeystore.jks -srckeystore clientkeystore.p12 -srcstoretype PKCS12 -srcstorepass $KEYSTORE_PASSWORD -alias 1 -storepass $KEYSTORE_PASSWORD

require an additional -noprompt, otherwise the following output is printed to the console if the script runs again:

Existing entry alias mykey exists, overwrite? [no]:  keytool error: java.lang.NullPointerException
Existing entry alias 1 exists, overwrite? [no]:  keytool error: java.lang.NullPointerException

In this case the keytool expects input from the user, which is not possible if the docker container wasn't started in interactive mode.