[BT:0.9.0] Error: File '' is a directory. java.lang.IllegalArgumentException: File '' is a directory

Describe the bug I try do build-apks from android app bundle but I get an error. I have already try to use 2 versions: 0.3.3 and 0.9.0 but these libs don’t work. I had to use sudo for making sure these libs have full access/permission to run the command line. I had to create 2 folders which have the name output.apks and output. But nothing work

sudo java -jar bundletool-all-0.9.0.jar build-apks --bundle=app.aab --output=output.apks --ks --ks-key-alias

Bundletool version(s) affected Version: 0.3.3 & 0.9.0

Stacktrace

[BT:0.9.0] Error: File '' is a directory.
java.lang.IllegalArgumentException: File '' is a directory.
	at com.google.common.base.Preconditions.checkArgument(Preconditions.java:204)
	at com.android.tools.build.bundletool.model.utils.files.FilePreconditions.checkFileExistsAndReadable(FilePreconditions.java:36)
	at com.android.tools.build.bundletool.model.SigningConfiguration.extractFromKeystore(SigningConfiguration.java:86)
	at com.android.tools.build.bundletool.commands.BuildApksCommand.fromFlags(BuildApksCommand.java:414)
	at com.android.tools.build.bundletool.commands.BuildApksCommand.fromFlags(BuildApksCommand.java:374)
	at com.android.tools.build.bundletool.BundleToolMain.main(BundleToolMain.java:74)
	at com.android.tools.build.bundletool.BundleToolMain.main(BundleToolMain.java:46)

To Reproduce

1. Download libs: 0.9.0 or 0.3.3
2. Run sudo java -jar bundletool-all-0.9.0.jar build-apks --bundle=app.aab --output=output.apks --ks --ks-key-alias

Expected behavior Generate APKs

Known workaround If you have found a workaround, please specify what it is.

Environment: OS: MacOS 10.14.2 Beta (18C52a)

Additional context

[plecesne]

It looks like you haven’t provided any value to the flags --ks and --ks-key-alias.

[plecesne]

As the error message mentions, the output file already exists. Delete it, or add the flag --overwrite to the command if you want to overwrite it.

You can find the list of flags in the help:

bundletool help build-apks