buildscripts: move library/plugin version information to a catalog

AcorusExamples/build.gradle

@@ -76,18 +76,17 @@ if (!hasProperty('mainClass')) {
 jar.manifest.attributes('Main-Class': 'jme3utilities.ui.test.AppChooser')
 
 dependencies {
-    implementation 'org.apache.commons:commons-exec:1.3'
-
-    implementation heartCoordinates
-    runtimeOnly 'org.jmonkeyengine:jme3-awt-dialogs:' + jme3Version
-    implementation 'org.jmonkeyengine:jme3-desktop:' + jme3Version
-    implementation 'org.jmonkeyengine:jme3-lwjgl3:' + jme3Version
-    runtimeOnly 'org.jmonkeyengine:jme3-testdata:' + jme3Version // for Jaime
+    implementation(libs.commons.exec)
+    implementation(libs.heart)
+    runtimeOnly(libs.jme3.awt.dialogs)
+    implementation(libs.jme3.desktop)
+    implementation(libs.jme3.lwjgl3)
+    runtimeOnly(libs.jme3.testdata) // for Jaime
 
     // AcorusExamples doesn't use jme3-jogg nor jme3-plugins
     //  -- they are included solely to avoid warnings from AssetConfig.
-    runtimeOnly 'org.jmonkeyengine:jme3-jogg:' + jme3Version
-    runtimeOnly 'org.jmonkeyengine:jme3-plugins:' + jme3Version
+    runtimeOnly(libs.jme3.jogg)
+    runtimeOnly(libs.jme3.plugins)
 
     //implementation 'com.github.stephengold:Acorus:' + acorusVersion // for published library
     implementation project(':AcorusLibrary') // for local library build

AcorusLibrary/build.gradle

@@ -19,8 +19,8 @@ ext {
 }
 
 dependencies {
-    api heartCoordinates
-    implementation 'org.jmonkeyengine:jme3-desktop:' + jme3Version // for VideoRecorderAppState
+    api(libs.heart)
+    implementation(libs.jme3.desktop) // for VideoRecorderAppState
 }
 
 // Register publishing tasks:

build.gradle

@@ -6,13 +6,6 @@ plugins {
 
 ext {
     jmeTarget = '' // distinguish non-JME libraries built for specific JME releases
-
-    // current version of the JMonkeyEngine libraries:
-    jme3Version = '3.7.0-beta1'
-
-    // module coordinates of external dependencies:
-    heartCoordinates = 'com.github.stephengold:Heart:9.0.0' + jmeTarget
-
     acorusSnapshot = '-SNAPSHOT' // for development builds
     //acorusSnapshot = '' // for release builds
     acorusVersion = '2.0.1' + jmeTarget

common.gradle

@@ -9,7 +9,7 @@ java {
 }
 
 checkstyle {
-    toolVersion '9.3'
+    toolVersion libs.versions.checkstyle.get()
 }
 
 tasks.withType(JavaCompile).configureEach { // Java compile-time options:

gradle/libs.versions.toml

@@ -0,0 +1,22 @@
+## catalog of libraries and plugins used to build the Acorus project
+
+[versions]
+
+checkstyle = "9.3"
+jme = "3.7.0-beta1"
+
+[libraries]
+
+commons-exec = "org.apache.commons:commons-exec:1.3"
+heart = "com.github.stephengold:Heart:9.0.0"
+jme3-awt-dialogs = { module = "org.jmonkeyengine:jme3-awt-dialogs", version.ref = "jme" }
+jme3-desktop = { module = "org.jmonkeyengine:jme3-desktop", version.ref = "jme" }
+jme3-heart = { module = "org.jmonkeyengine:jme3-heart", version.ref = "jme" }
+jme3-jogg = { module = "org.jmonkeyengine:jme3-jogg", version.ref = "jme" }
+jme3-lwjgl3 = { module = "org.jmonkeyengine:jme3-lwjgl3", version.ref = "jme" }
+jme3-plugins = { module = "org.jmonkeyengine:jme3-plugins", version.ref = "jme" }
+jme3-testdata = { module = "org.jmonkeyengine:jme3-testdata", version.ref = "jme" }
+
+[bundles]
+
+[plugins]