Move code from root to a new 'core' module so that 'dataframe' was the default artifact including all existing modules. And if you don't want some dependency, you can fall back to manually declaring needed modules yourself

Author: koperagen

build.gradle.kts

@@ -8,14 +8,11 @@ plugins {
     kotlin("jvm") version libs.versions.kotlin
     kotlin("libs.publisher") version libs.versions.libsPublisher
     kotlin("plugin.serialization") version libs.versions.kotlin
-    kotlin("jupyter.api") version libs.versions.kotlinJupyter
     kotlin("plugin.dataframe") version libs.versions.dataframe apply false
 
     id("org.jetbrains.dokka") version libs.versions.dokka
-    id("org.jetbrains.dataframe.generator")
 
     id("org.jmailen.kotlinter") version libs.versions.ktlint
-
 }
 
 val jupyterApiTCRepo: String by project
@@ -33,40 +30,11 @@ configurations {
 }
 
 dependencies {
-    implementation(libs.kotlin.stdlib)
-    implementation(libs.kotlin.stdlib.jdk8)
-    implementation(libs.kotlin.reflect)
-
-    api(libs.commonsCsv)
-    implementation(libs.klaxon)
-    implementation(libs.fuel)
-
-    implementation(libs.kotlin.datetimeJvm)
-    implementation("com.squareup:kotlinpoet:1.11.0")
-
-    testImplementation(libs.junit)
-    testImplementation(libs.kotestAssertions) {
-        exclude("org.jetbrains.kotlin", "kotlin-stdlib-jdk8")
-    }
-    testImplementation(libs.kotlin.scriptingJvm)
-    testImplementation(libs.jsoup)
-}
-
-kotlin {
-    explicitApi()
+    api(project(":core"))
+    api(project(":dataframe-arrow"))
+    api(project(":dataframe-excel"))
 }
 
-tasks.withType<JavaCompile> {
-    sourceCompatibility = JavaVersion.VERSION_1_8.toString()
-    targetCompatibility = JavaVersion.VERSION_1_8.toString()
-}
-
-tasks.withType<KotlinCompile> {
-    dependsOn(tasks.lintKotlin)
-    kotlinOptions {
-        freeCompilerArgs = freeCompilerArgs + listOf("-Xinline-classes", "-Xopt-in=kotlin.RequiresOptIn")
-    }
-}
 
 allprojects {
     tasks.withType<KotlinCompile> {
@@ -147,46 +115,3 @@ kotlinPublications {
         }
     }
 }
-
-tasks.lintKotlinMain {
-    exclude("**/*keywords*/**")
-}
-
-tasks.lintKotlinTest {
-    enabled = true
-}
-
-kotlinter {
-    ignoreFailures = false
-    reporters = arrayOf("checkstyle", "plain")
-    experimentalRules = true
-    disabledRules = arrayOf(
-            "no-wildcard-imports",
-            "experimental:spacing-between-declarations-with-annotations",
-            "experimental:enum-entry-name-case",
-            "experimental:argument-list-wrapping",
-            "experimental:annotation",
-            "max-line-length",
-            "filename"
-    )
-}
-
-val instrumentedJars: Configuration by configurations.creating {
-    isCanBeConsumed = true
-    isCanBeResolved = false
-}
-
-artifacts {
-    add("instrumentedJars", tasks.jar.get().archiveFile) {
-        builtBy(tasks.jar)
-    }
-}
-
-tasks.test {
-    maxHeapSize = "2048m"
-}
-
-tasks.processJupyterApiResources {
-    libraryProducers = listOf("org.jetbrains.kotlinx.dataframe.jupyter.Integration")
-}
-

core/build.gradle.kts

@@ -0,0 +1,110 @@
+
+@Suppress("DSL_SCOPE_VIOLATION", "UnstableApiUsage")
+plugins {
+    kotlin("jvm")
+    kotlin("libs.publisher")
+    kotlin("plugin.serialization")
+    kotlin("jupyter.api") version libs.versions.kotlinJupyter
+
+    id("org.jetbrains.dataframe.generator")
+
+    id("org.jmailen.kotlinter")
+}
+
+group = "org.jetbrains.kotlinx"
+
+val jupyterApiTCRepo: String by project
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/public/p/kotlinx-html/maven")
+    maven(jupyterApiTCRepo)
+}
+
+dependencies {
+    implementation(libs.kotlin.stdlib)
+    implementation(libs.kotlin.stdlib.jdk8)
+    implementation(libs.kotlin.reflect)
+
+    api(libs.commonsCsv)
+    implementation(libs.klaxon)
+    implementation(libs.fuel)
+
+    implementation(libs.kotlin.datetimeJvm)
+    implementation("com.squareup:kotlinpoet:1.11.0")
+
+    testImplementation(libs.junit)
+    testImplementation(libs.kotestAssertions) {
+        exclude("org.jetbrains.kotlin", "kotlin-stdlib-jdk8")
+    }
+    testImplementation(libs.kotlin.scriptingJvm)
+    testImplementation(libs.jsoup)
+}
+
+tasks.lintKotlinMain {
+    exclude("**/*keywords*/**")
+}
+
+tasks.lintKotlinTest {
+    enabled = true
+}
+
+kotlinter {
+    ignoreFailures = false
+    reporters = arrayOf("checkstyle", "plain")
+    experimentalRules = true
+    disabledRules = arrayOf(
+        "no-wildcard-imports",
+        "experimental:spacing-between-declarations-with-annotations",
+        "experimental:enum-entry-name-case",
+        "experimental:argument-list-wrapping",
+        "experimental:annotation",
+        "max-line-length",
+        "filename"
+    )
+}
+
+kotlin {
+    explicitApi()
+}
+
+tasks.withType<JavaCompile> {
+    sourceCompatibility = JavaVersion.VERSION_1_8.toString()
+    targetCompatibility = JavaVersion.VERSION_1_8.toString()
+}
+
+tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
+    dependsOn(tasks.lintKotlin)
+    kotlinOptions {
+        freeCompilerArgs = freeCompilerArgs + listOf("-Xinline-classes", "-Xopt-in=kotlin.RequiresOptIn")
+    }
+}
+
+tasks.test {
+    maxHeapSize = "2048m"
+}
+
+tasks.processJupyterApiResources {
+    libraryProducers = listOf("org.jetbrains.kotlinx.dataframe.jupyter.Integration")
+}
+
+kotlinPublications {
+    publication {
+        publicationName.set("core")
+        artifactId.set("dataframe-core")
+        description.set("Dataframe core API")
+        packageName.set(artifactId)
+    }
+}
+
+val instrumentedJars: Configuration by configurations.creating {
+    isCanBeConsumed = true
+    isCanBeResolved = false
+}
+
+artifacts {
+    add("instrumentedJars", tasks.jar.get().archiveFile) {
+        builtBy(tasks.jar)
+    }
+}

src/main/kotlin/org/jetbrains/kotlinx/dataframe/ColumnsContainer.kt renamed to core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/ColumnsContainer.kt

@@ -16,7 +16,6 @@ import org.jetbrains.kotlinx.dataframe.api.rows
 import org.jetbrains.kotlinx.dataframe.columns.ColumnPath
 import org.jetbrains.kotlinx.dataframe.columns.ColumnSet
 import org.jetbrains.kotlinx.dataframe.columns.UnresolvedColumnsPolicy
-import org.jetbrains.kotlinx.dataframe.columns.values
 import org.jetbrains.kotlinx.dataframe.impl.DataFrameReceiver
 import org.jetbrains.kotlinx.dataframe.impl.aggregation.receivers.AggregateInternalDsl
 import org.jetbrains.kotlinx.dataframe.impl.columns.toColumns

src/main/kotlin/org/jetbrains/kotlinx/dataframe/DataColumn.kt renamed to core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/DataColumn.kt

@@ -105,8 +105,8 @@ class SampleNotebooksTests : DataFrameJupyterTest() {
     )
 
     companion object {
-        const val ideaExamplesPath = "examples/idea-examples"
-        const val jupyterExamplesPath = "examples/jupyter-notebooks"
+        const val ideaExamplesPath = "../examples/idea-examples"
+        const val jupyterExamplesPath = "../examples/jupyter-notebooks"
 
         fun testFile(folder: String, fileName: String) = fileName to "$jupyterExamplesPath/$folder/$fileName"
     }