[edit]Refer to Kotlin version from gradle.properties

Author: subroh0508

buildSrc/build.gradle.kts

@@ -1,3 +1,5 @@
+import java.util.*
+
 plugins {
     `kotlin-dsl`
 }
@@ -6,6 +8,12 @@ repositories {
     gradlePluginPortal()
 }
 
+val props = Properties().apply {
+    file("../gradle.properties").inputStream().use(this::load)
+}
+
+fun version(target: String) = props.getProperty("${target}.version")
+
 dependencies {
-    implementation(kotlin("gradle-plugin", "1.5.21"))
+    implementation(kotlin("gradle-plugin", version("kotlin")))
 }

buildSrc/src/main/java/Kotlin.kt

@@ -0,0 +1,7 @@
+@file:Suppress("HardcodedStringLiteral")
+
+import org.gradle.api.Project
+
+val Project.kotlinVersion get() = version("kotlin")
+val Project.kotlinStdlibJs get() = "org.jetbrains.kotlin:kotlin-stdlib-js:$kotlinVersion"
+val Project.kotlinTestJs get() = "org.jetbrains.kotlin:kotlin-test-js:$kotlinVersion"

buildSrc/src/main/java/Libraries.kt

@@ -1,31 +1,23 @@
 @Suppress("unused")
 object Libraries {
-    object Plugin {
-        const val kotlinGradle = "org.jetbrains.kotlin:kotlin-gradle-plugin:${Kotlin.version}"
-    }
-
-    object Kotlin {
-        const val version = "1.5.21"
-        const val wrappersBuild = "pre.218-kotlin-$version"
-
-        const val js = "org.jetbrains.kotlin:kotlin-stdlib-js:$version"
-        const val jsTest = "org.jetbrains.kotlin:kotlin-test-js:$version"
+    class JsWrappers(kotlinVersion: String) {
+        private val wrappersBuild = "pre.218-kotlin-$kotlinVersion"
 
-        const val reactVersion = "${Npm.react}-$wrappersBuild"
-        const val react = "org.jetbrains.kotlin-wrappers:kotlin-react:$reactVersion"
-        const val reactDom = "org.jetbrains.kotlin-wrappers:kotlin-react-dom:$reactVersion"
+        private val reactVersion = "${Npm.react}-$wrappersBuild"
+        val react = "org.jetbrains.kotlin-wrappers:kotlin-react:$reactVersion"
+        val reactDom = "org.jetbrains.kotlin-wrappers:kotlin-react-dom:$reactVersion"
 
-        const val htmlVersion = "0.7.3"
-        const val html = "org.jetbrains.kotlinx:kotlinx-html-js:$htmlVersion"
+        private val htmlVersion = "0.7.3"
+        val html = "org.jetbrains.kotlinx:kotlinx-html-js:$htmlVersion"
 
-        const val cssVersion = "1.0.0-$wrappersBuild"
-        const val css = "org.jetbrains.kotlin-wrappers:kotlin-css-js:$cssVersion"
+        private val cssVersion = "1.0.0-$wrappersBuild"
+        val css = "org.jetbrains.kotlin-wrappers:kotlin-css-js:$cssVersion"
 
-        const val styledVersion = "${Npm.styledComponent}-$wrappersBuild"
-        const val styled = "org.jetbrains.kotlin-wrappers:kotlin-styled:$styledVersion"
+        private val styledVersion = "${Npm.styledComponent}-$wrappersBuild"
+        val styled = "org.jetbrains.kotlin-wrappers:kotlin-styled:$styledVersion"
 
-        const val extensionsVersion = "1.0.1-$wrappersBuild"
-        const val extensions = "org.jetbrains.kotlin-wrappers:kotlin-extensions:$extensionsVersion"
+        private val extensionsVersion = "1.0.1-$wrappersBuild"
+        val extensions = "org.jetbrains.kotlin-wrappers:kotlin-extensions:$extensionsVersion"
     }
 
     object Npm {

buildSrc/src/main/java/Projects.kt

@@ -0,0 +1,5 @@
+@file:Suppress("HardcodedStringLiteral")
+
+import org.gradle.api.Project
+
+fun Project.version(target: String) = prop("$target.version")

buildSrc/src/main/java/Properties.kt

@@ -0,0 +1,5 @@
+import org.gradle.api.Project
+import org.gradle.api.Task
+
+internal fun Project.prop(propertyName: String) = property(propertyName) as String
+internal fun Task.prop(propertyName: String) = project.prop(propertyName)

core/build.gradle.kts

@@ -7,13 +7,14 @@ plugins {
 }
 
 dependencies {
-    api(Libraries.Kotlin.html)
-    api(Libraries.Kotlin.react)
-    api(Libraries.Kotlin.reactDom)
-    api(Libraries.Kotlin.css)
-    api(Libraries.Kotlin.extensions)
+    val wrappers = Libraries.JsWrappers(kotlinVersion)
+    api(wrappers.html)
+    api(wrappers.react)
+    api(wrappers.reactDom)
+    api(wrappers.css)
+    api(wrappers.extensions)
 
     api(npm("@material-ui/core", Libraries.Npm.MaterialUi.core))
 
-    testImplementation(Libraries.Kotlin.jsTest)
+    testImplementation(kotlinTestJs)
 }

gradle.properties

@@ -1,2 +1,4 @@
 kotlin.code.style=official
 kotlin.js.compiler=both
+
+kotlin.version=1.5.21

lab/build.gradle.kts

@@ -8,8 +8,11 @@ plugins {
 
 dependencies {
     api(project(":core"))
-    api(Libraries.Kotlin.extensions)
+
+    val wrappers = Libraries.JsWrappers(kotlinVersion)
+    api(wrappers.extensions)
+
     api(npm("@material-ui/lab", Libraries.Npm.MaterialUi.lab))
 
-    testImplementation(Libraries.Kotlin.jsTest)
+    testImplementation(kotlinTestJs)
 }

pickers/build.gradle.kts

@@ -9,15 +9,18 @@ plugins {
 dependencies {
     api(project(":core"))
     api(project(":pickers:date-io"))
-    api(Libraries.Kotlin.html)
-    api(Libraries.Kotlin.react)
-    api(Libraries.Kotlin.reactDom)
-    api(Libraries.Kotlin.css)
-    api(Libraries.Kotlin.extensions)
+
+    val wrappers = Libraries.JsWrappers(kotlinVersion)
+    api(wrappers.html)
+    api(wrappers.react)
+    api(wrappers.reactDom)
+    api(wrappers.css)
+    api(wrappers.extensions)
+
     api(npm("react", Libraries.Npm.react))
     api(npm("react-dom", Libraries.Npm.react))
     api(npm("@material-ui/core", Libraries.Npm.MaterialUi.core))
     api(npm("@material-ui/pickers", Libraries.Npm.MaterialUi.pickers))
 
-    testImplementation(Libraries.Kotlin.jsTest)
+    testImplementation(kotlinTestJs)
 }

pickers/date-io/date-fns/build.gradle.kts

@@ -7,7 +7,10 @@ plugins {
 
 dependencies {
     api(project(":pickers:date-io"))
-    api(Libraries.Kotlin.extensions)
+
+    val wrappers = Libraries.JsWrappers(kotlinVersion)
+    api(wrappers.extensions)
+
     api(npm("@date-io/date-fns", Libraries.Npm.dateIo))
     api(npm("date-fns", Libraries.Npm.dateFns))
 }