SmashingMods · ExpensiveKoala · Apr 30, 2026 · Apr 30, 2026 · Apr 30, 2026 · Apr 30, 2026
diff --git a/.gitignore b/.gitignore
@@ -1,28 +1,43 @@
-# eclipse
-bin
-*.launch
-.settings
-.metadata
-.classpath
-.project
+### Gradle ###
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/**/build/
 
-# idea
-out
-*.ipr
+### IntelliJ IDEA ###
+.idea/
 *.iws
 *.iml
-.idea
+*.ipr
+out/
+!**/src/**/out/
 
-# gradle
-build
-.gradle
+.run/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.eclipse/
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/**/bin/
+
+### VS Code ###
+.vscode/
 
-# other
-eclipse
-run
+### Mac OS ###
+.DS_Store
 
-# Files from Forge MDK
-forge*changelog.txt
+### Minecraft Modding ###
+run/
+!**/src/**/run/
+**/src/generated/**/.cache/
+repo/
+!**/src/**/repo/
 
 # Project
 secrets.properties

diff --git a/build.gradle b/build.gradle
@@ -1,115 +1,157 @@
 plugins {
-    id 'java'
+    id 'java-library'
+    id 'maven-publish'
+    id 'net.neoforged.moddev' version '2.0.141'
     id 'idea'
-    id 'net.minecraftforge.gradle' version '[6.0,6.2)'
-    id 'org.parchmentmc.librarian.forgegradle' version '1.+'
     id 'com.matthewprenger.cursegradle' version '1.4.0'
 }
 
-apply plugin: 'net.minecraftforge.gradle'
-apply plugin: 'org.parchmentmc.librarian.forgegradle'
-apply plugin: 'maven-publish'
+tasks.named('wrapper', Wrapper).configure {
+    // Define wrapper values here so as to not have to always do so when updating gradlew.properties.
+    // Switching this to Wrapper.DistributionType.ALL will download the full gradle sources that comes with
+    // documentation attached on cursor hover of gradle classes and methods. However, this comes with increased
+    // file size for Gradle. If you do switch this to ALL, run the Gradle wrapper task twice afterwards.
+    // (Verify by checking gradle/wrapper/gradle-wrapper.properties to see if distributionUrl now points to `-all`)
+    distributionType = Wrapper.DistributionType.BIN
+}
+
+version = "${minecraft_version}-${mod_version}"
+group = mod_group_id
+
+sourceSets.main.resources {
+    // Include resources generated by data generators.
+    srcDir('src/generated/resources')
+
+    // Exclude common development only resources from finalized outputs
+    exclude("**/*.bbmodel") // BlockBench project files
+    exclude("src/generated/**/.cache") // datagen cache files
+}
+
+repositories {
+    maven { url "https://maven.blamejared.com/" }
+    maven {
+        url "https://www.cursemaven.com"
+        content {
+            includeGroup "curse.maven"
+        }
+    }
+}
+
+base {
+    archivesName = mod_id
+}
 
-version = "$minecraft_version-$mod_version"
-group = 'com.smashingmods'
-archivesBaseName = 'chemlib'
+// Mojang ships Java 21 to end users in 1.21.1, so mods should target Java 21.
+java.toolchain.languageVersion = JavaLanguageVersion.of(21)
+
+neoForge {
+    // Specify the version of NeoForge to use.
+    version = project.neo_version
+
+    parchment {
+        mappingsVersion = project.parchment_mappings_version
+        minecraftVersion = project.parchment_minecraft_version
+    }
 
-java.toolchain.languageVersion = JavaLanguageVersion.of(17)
+    // This line is optional. Access Transformers are automatically detected
+    accessTransformers = project.files('src/main/resources/META-INF/accesstransformer.cfg')
 
-minecraft {
-    mappings channel: mapping_channel, version: "$mapping_version-1.20.1"
-    copyIdeResources = true
+    // Default run configurations.
+    // These can be tweaked, removed, or duplicated as needed.
     runs {
         client {
-            workingDirectory project.file('run')
-            property 'forge.logging.markers', 'REGISTRIES'
-            property 'forge.logging.console.level', 'debug'
-            jvmArgs '-XX:+AllowEnhancedClassRedefinition'
-
-            mods {
-                chemlib {
-                    source sourceSets.main
-                }
-            }
+            client()
+
+            // Comma-separated list of namespaces to load gametests from. Empty = all namespaces.
+            systemProperty 'neoforge.enabledGameTestNamespaces', project.mod_id
         }
 
         server {
-            workingDirectory project.file('run')
-            property 'forge.logging.markers', 'REGISTRIES'
-            property 'forge.logging.console.level', 'debug'
-            jvmArgs '-XX:+AllowEnhancedClassRedefinition'
-
-            mods {
-                chemlib {
-                    source sourceSets.main
-                }
-            }
+            server()
+            programArgument '--nogui'
+            systemProperty 'neoforge.enabledGameTestNamespaces', project.mod_id
+        }
+
+        // This run config launches GameTestServer and runs all registered gametests, then exits.
+        // By default, the server will crash when no gametests are provided.
+        // The gametest system is also enabled by default for other run configs under the /test command.
+        gameTestServer {
+            type = "gameTestServer"
+            systemProperty 'neoforge.enabledGameTestNamespaces', project.mod_id
         }
 
         data {
-            workingDirectory project.file('run')
-            property 'forge.logging.markers', 'REGISTRIES'
-            property 'forge.logging.console.level', 'debug'
-            jvmArgs '-XX:+AllowEnhancedClassRedefinition'
-            args '--mod', "$archivesBaseName", '--all', '--output', file('src/generated/resources'), '--existing', file('src/main/resources')
-
-            mods {
-                chemlib {
-                    source sourceSets.main
-                }
-            }
+            data()
+
+            // example of overriding the workingDirectory set in configureEach above, uncomment if you want to use it
+            // gameDirectory = project.file('run-data')
+
+            // Specify the modid for data generation, where to output the resulting resource, and where to look for existing resources.
+            programArguments.addAll '--mod', project.mod_id, '--all', '--output', file('src/generated/resources/').getAbsolutePath(), '--existing', file('src/main/resources/').getAbsolutePath()
         }
-    }
-}
 
-sourceSets.main.resources { srcDir 'src/generated/resources' }
+        // applies to all the run configs above
+        configureEach {
+            // Recommended logging data for a userdev environment
+            // The markers can be added/remove as needed separated by commas.
+            // "SCAN": For mods scan.
+            // "REGISTRIES": For firing of registry events.
+            // "REGISTRYDUMP": For getting the contents of all registries.
+            systemProperty 'forge.logging.markers', 'REGISTRIES'
+
+            // Recommended logging level for the console
+            // You can set various levels here.
+            // Please read: https://stackoverflow.com/questions/2031163/when-to-use-the-different-log-levels
+            logLevel = org.slf4j.event.Level.DEBUG
+        }
+    }
 
-repositories {
-    maven { url "https://maven.blamejared.com/" }
-    maven {
-        url "https://www.cursemaven.com"
-        content {
-            includeGroup "curse.maven"
+    mods {
+        // define mod <-> source bindings
+        // these are used to tell the game which sources are for which mod
+        // multi mod projects should define one per mod
+        "${mod_id}" {
+            sourceSet(sourceSets.main)
         }
     }
 }
 
-dependencies {
-    minecraft "net.minecraftforge:forge:${minecraft_version}-${forge_version}"
-    implementation fg.deobf("mezz.jei:jei-${minecraft_version}-common-api:${jei_version}")
-    runtimeOnly fg.deobf("mezz.jei:jei-${minecraft_version}-forge:${jei_version}")
+configurations {
+    runtimeClasspath.extendsFrom localRuntime
 }
 
-def resourceTargets = ['META-INF/mods.toml', 'pack.mcmeta']
-def replaceProperties = [
-        minecraft_version: minecraft_version, minecraft_version_range: minecraft_version_range,
-        forge_version: forge_version, forge_version_range: forge_version_range,
-        loader_version_range: loader_version_range,
-        mod_id: mod_id, mod_name: mod_name, mod_license: mod_license, mod_version: mod_version,
-        mod_authors: mod_authors, mod_description: mod_description
-]
-processResources {
-    inputs.properties replaceProperties
-    replaceProperties.put 'project', project
 
-    filesMatching(resourceTargets) {
-        expand replaceProperties
-    }
+
+dependencies {
+    compileOnly "mezz.jei:jei-${minecraft_version}-neoforge-api:${jei_version}"
+    runtimeOnly "mezz.jei:jei-${minecraft_version}-neoforge:${jei_version}"
 }
 
-jar {
-    manifest {
-        attributes([
-                "Specification-Title"     : "$archivesBaseName",
-                "Specification-Vendor"    : "SmashingMods",
-                "Specification-Version"   : "1",
-                "Implementation-Title"    : project.name,
-                "Implementation-Version"  : project.version,
-                "Implementation-Vendor"   : "SmashingMods",
-                "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")
-        ])
-    }
+// This block of code expands all declared replace properties in the specified resource targets.
+// A missing property will result in an error. Properties are expanded using ${} Groovy notation.
+var generateModMetadata = tasks.register("generateModMetadata", ProcessResources) {
+    var replaceProperties = [
+            minecraft_version      : minecraft_version,
+            minecraft_version_range: minecraft_version_range,
+            neo_version            : neo_version,
+            loader_version_range   : loader_version_range,
+            mod_id                 : mod_id,
+            mod_name               : mod_name,
+            mod_authors            : mod_authors,
+            mod_description        : mod_description,
+            mod_license            : mod_license,
+            mod_version            : mod_version,
+    ]
+    inputs.properties replaceProperties
+    expand replaceProperties
+    from "src/main/templates"
+    into "build/generated/sources/modMetadata"
 }
+// Include the output of "generateModMetadata" as an input directory for the build
+// this works with both building through Gradle and the IDE.
+sourceSets.main.resources.srcDir generateModMetadata
+// To avoid having to run "generateModMetadata" manually, make it run on every project reload
+neoForge.ideSyncTask generateModMetadata
 
 def secrets = new Properties()
 file('secrets.properties').withInputStream {
@@ -125,23 +167,10 @@ fileTree("secrets").matching {
         }
 }
 
-jar.finalizedBy('reobfJar')
-
-java {
-    withSourcesJar()
-    withJavadocJar()
-}
-
 publishing {
     publications {
-        mavenJava(MavenPublication) {
-            afterEvaluate {
-                artifact project.jar
-                artifact project.sourcesJar
-                artifact project.javadocJar
-            }
-            setGroupId 'smashingmods'
-            setArtifactId 'chemlib'
+        register('mavenJava', MavenPublication) {
+            from components.java
         }
     }
     repositories {
@@ -176,4 +205,12 @@ curseforge {
 
 tasks.withType(JavaCompile).configureEach {
     options.encoding = 'UTF-8'
+}
+
+// IDEA no longer automatically downloads sources/javadoc jars for dependencies, so we need to explicitly enable the behavior.
+idea {
+    module {
+        downloadSources = true
+        downloadJavadoc = true
+    }
 }
diff --git a/changelog.md b/changelog.md
@@ -1,6 +1,6 @@
-# ChemLib 1.20.1-2.0.19
+# ChemLib 1.21.1-2.0.20
 
 Changes:
 
-- Fix all calls to toUpperCase() passing in Locale.ROOT. This should fix issues with the Turkish language loading the mod.
-- Upgrade Forge version.
+- Port to 1.21.1 neoforge
+- Gaseous fluids flow upwards
diff --git a/gradle.properties b/gradle.properties
@@ -1,20 +1,23 @@
 org.gradle.jvmargs=-Xmx3G
-org.gradle.daemon=false
+org.gradle.daemon=true
+org.gradle.parallel=true
+org.gradle.caching=true
+org.gradle.configuration-cache=true
 
-minecraft_version=1.20.1
-minecraft_version_range=[1.20,1.21)
-forge_version=47.1.3
-forge_version_range=[47,)
-loader_version_range=[47,)
-mapping_channel=parchment
-mapping_version=2023.09.03
+minecraft_version=1.21.1
+minecraft_version_range=[1.21,1.22)
+neo_version=21.1.228
+loader_version_range=[1,)
+# https://parchmentmc.org/docs/getting-started
+parchment_minecraft_version=1.21.1
+parchment_mappings_version=2024.11.17
 
 mod_id=chemlib
 mod_name=ChemLib
 mod_license=LGPLv2.1
-mod_version=2.0.19
+mod_version=2.0.20
 mod_group_id=com.smashingmods.chemlib
 mod_authors=DarkArcana
 mod_description=ChemLib provides all of the elements of the periodic table and many compounds of those elements. It also includes some items based on the elements and compounds such as ingots and lamps.\nCredits:\n- Andrea Hazard, creator of 'Enhanced Bohr Model' images. Their work is shared under the Creative Commons Attribution-Share Alike 4.0 International license. Read more about the license here: https://creativecommons.org/licenses/by-sa/4.0/deed.en
 
-jei_version=15.2.0.22
+jei_version=19.27.0.340