Load dataframe-jupyter from core in notebooks

CONTRIBUTING.md

@@ -112,6 +112,9 @@ This library is built with Gradle.
   making local publishing faster: `./gradlew publishToMavenLocal -PskipKodex`.
   This, however, publishes the library with "broken" KDocs, 
   so it's only meant for faster iterations during development.
+* The parameter `-PincludeCoreLibrariesJson` makes the build include the `libraries.json` file in the `:core` module.
+  This file allows loading dataframe-jupyter when dataframe-core is present on its own in a Kotlin Notebook.
+  Usually only done when publishing.
 
 You can import this project into IDEA, but you have to delegate the build actions
 to Gradle (in Preferences -> Build, Execution, Deployment -> Build Tools -> Gradle -> Runner)

core/build.gradle.kts

@@ -3,7 +3,7 @@ import com.google.devtools.ksp.gradle.KspTaskJvm
 import io.github.devcrocod.korro.KorroTask
 import nl.jolanrensen.kodex.gradle.creatingRunKodexTask
 import org.gradle.jvm.tasks.Jar
-import org.gradle.kotlin.dsl.withType
+import org.intellij.lang.annotations.Language
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
@@ -251,6 +251,52 @@ val changeJarTask by tasks.registering {
     }
 }
 
+// generateLibrariesJson makes sure a META-INF/kotlin-jupyter-libraries/libraries.json file is generated
+// This file allows loading dataframe-jupyter when dataframe-core is present on its own in a Kotlin Notebook.
+val generatedJupyterResourcesDir = layout.buildDirectory.dir("generated/jupyter")
+val generateLibrariesJson by tasks.registering {
+    val outDir = generatedJupyterResourcesDir.get().asFile.resolve("META-INF/kotlin-jupyter-libraries")
+    val outFile = outDir.resolve("libraries.json")
+    outputs.file(outFile)
+
+    doLast {
+        outDir.mkdirs()
+        @Language("json")
+        val content =
+            """
+            {
+              "descriptors": [
+                {
+                  "init": [
+                    "USE { dependencies(\"org.jetbrains.kotlinx:dataframe-jupyter:${project.version}\") }"
+                  ]
+                }
+              ]
+            }
+            """.trimIndent()
+
+        outFile.delete()
+        outFile.writeText(content)
+        logger.lifecycle("generated META-INF/kotlin-jupyter-libraries/libraries.json for :core")
+    }
+}
+
+// If `includeCoreLibrariesJson` is set, modify the processResources task such that it includes
+// a META-INF libraries.json file.
+// This file allows loading dataframe-jupyter when dataframe-core is present on its own in a Kotlin Notebook.
+// This is usually only done when publishing.
+tasks.processResources {
+    if (project.hasProperty("includeCoreLibrariesJson")) {
+        dependsOn(generateLibrariesJson)
+        from(generatedJupyterResourcesDir) {
+            into("") // keep META-INF/... structure as generated
+        }
+        doLast {
+            logger.lifecycle("$this includes generated META-INF/kotlin-jupyter-libraries/libraries.json")
+        }
+    }
+}
+
 // if `processKDocsMain` runs, the Jar tasks must run after it so the generated-sources are there
 tasks.withType<Jar> {
     mustRunAfter(changeJarTask, tasks.generateKeywordsSrc, processKDocsMain)

dataframe-jupyter/src/main/kotlin/org/jetbrains/kotlinx/dataframe/jupyter/Integration.kt

@@ -56,7 +56,7 @@ import kotlin.reflect.KType
 import kotlin.reflect.full.isSubtypeOf
 
 /** Users will get an error if their Kotlin Jupyter kernel is older than this version. */
-private const val MIN_KERNEL_VERSION = "0.11.0.198"
+private const val MIN_KERNEL_VERSION = "0.15.0.606"
 
 internal val newDataSchemas = mutableListOf<KClass<*>>()
 

gradle.properties

@@ -22,3 +22,12 @@ ksp.useKSP2=false
 kotlin.dataframe.debug=false
 
 kotlin.incremental=false
+
+# Can speed up build time but stops KDocs from being preprocessed.
+# It can also be turned on from the command line with `-PskipKodex`
+# skipKodex=true
+
+# If `true`, builds include the core/src/main/resources/META-INF/kotlin-jupyter-libraries/libraries.json file.
+# This file allows loading dataframe-jupyter when dataframe-core is present on its own in a Kotlin Notebook.
+# This is usually only done when publishing and can be turned on from the command line with `-PincludeCoreLibrariesJson`
+# includeCoreLibrariesJson=true

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 ksp = "2.2.20-2.0.2"
-kotlinJupyter = "0.15.0-587"
+kotlinJupyter = "0.15.0-629"
 
 ktlint = "12.3.0"