Fix signing for releases (#3174)

* Fix publication plugin to look for the correctly-named properties

* try new secrets

* fix check for `useGpgCommand`

* Revert "try new secrets"

This reverts commit e6a96cf5eda7543599de1d5d7258ff40913db7d4.

build-logic/src/main/kotlin/PublicationPlugin.kt

diff --git a/build-logic/src/main/kotlin/PublicationPlugin.kt b/build-logic/src/main/kotlin/PublicationPlugin.kt
index 7115f81..4825cfe 100644
--- a/build-logic/src/main/kotlin/PublicationPlugin.kt
+++ b/build-logic/src/main/kotlin/PublicationPlugin.kt
@@ -31,9 +31,9 @@
                 // Pass `-PuseGpgCmd` to sign artifacts using local gpg agent
                 val useGpgCmd = localGradleProperty("useGpgCmd").orNull
 
-                val signingKeyId = localGradleProperty("signingKeyId").orNull?.takeIf { it.isNotEmpty() }
-                val signingKey = localGradleProperty("signingKey").orNull?.takeIf { it.isNotEmpty() }
-                val signingPassword = localGradleProperty("signingKeyPassword").orNull?.takeIf { it.isNotEmpty() }
+                val signingKeyId = localGradleProperty("signingInMemoryKeyId").orNull?.takeIf { it.isNotEmpty() }
+                val signingKey = localGradleProperty("signingInMemoryKey").orNull?.takeIf { it.isNotEmpty() }
+                val signingPassword = localGradleProperty("signingInMemoryKeyPassword").orNull?.takeIf { it.isNotEmpty() }
                 val signingConfigPresent = signingKeyId != null && signingKey != null && signingPassword != null
 
                 // Avoid setting empty strings as signing keys. This avoids breaking the build when PR is opened from a fork.
@@ -45,7 +45,7 @@
                     configure<SigningExtension> {
                         isRequired = signingConfigPresent // for more reproducible builds, fail if SNAPSHOT builds are misconfigured too
 
-                        if (useGpgCmd != "false") {
+                        if (useGpgCmd != null && useGpgCmd != "false") {
                             useGpgCmd()
                         }
                     }