Cannot sign with in-memory key '[...]:signMavenPublication' because it has no configured signatory

As explained in the README: https://github.com/vanniktech/gradle-maven-publish-plugin#signing I moved to in-memory GPG keys, using the following Gradle properties:

signingInMemoryKey=...
signingInMemoryKeyId=...
signingInMemoryPassword=...

I used gpg --export-secret-keys --armor $KEY_ID and assigned the data to signingInMemoryKey. I also tried with the base64 version. It really seems the key is well decrypted, because when I did it wrong I had the error Could not read PGP secret key, and I do not have it here.

I did not change my gradle code, but now it fails with the message: Cannot perform signing task '[...]:signMavenPublication' because it has no configured signatory You can see the gradle code here: https://github.com/aldebaran/pddl-planning-android/blob/a97d0656b7fe65cc0668b37c9e0da89e044932f0/pddl-planning/build.gradle

And the full error report with the stacktrace here: https://pastebin.com/3aiRjsZz

I am probably doing something wrong, but I cannot find any clue about it in the README.

[twyatt]

I encountered this failure when I had one or more of my singingInMemory* properties configured incorrectly.

At first, my singingInMemoryKey wasn’t stripped of the header, footer and newlines (as described in https://github.com/vanniktech/gradle-maven-publish-plugin/pull/201#discussion_r584270633).

Then, I had specified the wrong signingInMemoryKeyId. I ultimately ended up just removing this property, as it is optional.

I also had specified the password under signingInMemoryPassword before realizing that I was missing the Key portion of the property name (i.e. it is supposed to be signingInMemoryKeyPassword — MavenPublishBaseExtension.kt#L121).

[gabrielittner]

As @twyatt mentioned the readme had the wrong property name. Sorry for the confusion