Hi there! This is a weird one. I have some basic debug in the constructor and pre-init method of my mod. If I use the Gradle task "runServer", I see the debug being printed (so meaning my mod is seemingly being loaded) in IntelliJ's console. If I, however, "shadowJar" and then drop that new jar file into a test server I have locally on my pc, my mod is never loaded; the debug never prints in the server console nor do I see any sort of output at all containing my mod's name. I'm very confused by this, but if I had to take a guess, I'm thinking there might be something I'm doing wrong with my build.gradle for shading. In case you happen to think that might actually be what the problem is, I'll include my build.gradle below:

 

buildscript {
    repositories {
        // These repositories are only for Gradle plugins, put any other repositories in the repository block further below
        maven { url = 'https://maven.minecraftforge.net' }
        maven { url = 'https://repo.spongepowered.org/repository/maven-public/' }
        mavenCentral()
    }
    dependencies {
        classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '5.1.+', changing: true
        classpath 'org.spongepowered:mixingradle:0.7-SNAPSHOT'
    }
}

plugins {
    id 'com.github.johnrengelman.shadow' version '7.1.2' //6.0.0
}

apply plugin: 'net.minecraftforge.gradle'
apply plugin: 'org.spongepowered.mixin'
apply plugin: 'com.github.johnrengelman.shadow'

group = "com.test"
version = "${mc_version}-${mod_version}"
archivesBaseName = "${mod_name}"

java {
    toolchain.languageVersion = JavaLanguageVersion.of(8)
}

minecraft {
    mappings channel: 'snapshot', version: "${mappings_version}"
    // accessTransformer = file('src/main/resources/META-INF/accesstransformer.cfg')

    runs {
        client {
            workingDirectory project.file('run')

            property 'forge.logging.markers', 'REGISTRIES'
            property 'forge.logging.console.level', 'debug'

            mods {
                tesseract {
                    source sourceSets.main
                }
            }
        }

        server {
            workingDirectory project.file('run')

            property 'forge.logging.markers', 'REGISTRIES'
            property 'forge.logging.console.level', 'debug'

            mods {
                tesseract {
                    source sourceSets.main
                }
            }
        }

        data {
            workingDirectory project.file('run')

            property 'forge.logging.markers', 'REGISTRIES'
            property 'forge.logging.console.level', 'debug'

            args '--mod', 'tesseract', '--all', '--output', file('src/generated/resources/'), '--existing', file('src/main/resources/')

            mods {
                tesseract {
                    source sourceSets.main
                }
            }
        }
    }
}

mixin {
    add sourceSets.main, "Tesseract.refmap.json"

    config "Tesseract.mixins.json"
}

// Include resources generated by data generators.
sourceSets.main.resources { srcDir 'src/generated/resources' }

tasks.withType(JavaCompile) {
    options.encoding = 'UTF-8'
}

repositories {
    maven { url 'https://jitpack.io' }
}

ext {
    rxjava = 'io.reactivex.rxjava3:rxjava:3.1.3'
    lombok = 'org.projectlombok:lombok:1.18.22'
    math = "org.spongepowered:math:2.0.1"
    config = 'com.electronwill.night-config:toml:3.6.5'
    caffeine = 'com.github.ben-manes.caffeine:caffeine:2.9.3' //3.0.5 when no longer on Java 8
    mongo = 'org.mongodb:mongodb-driver-sync:4.4.1'
}

dependencies {
    minecraft "net.minecraftforge:forge:${forge_version}"

//    deobfProvided "mezz.jei:jei_${mc_version}:${jei_version}:api"
//    runtime "mezz.jei:jei_${mc_version}:${jei_version}"
//    compile "org.apache.httpcomponents:fluent-hc:${httpclient_version}"

    // Examples using mod jars from ./libs
    // implementation fg.deobf("blank:coolmod-${mc_version}:${coolmod_version}")

    annotationProcessor 'org.spongepowered:mixin:0.8.5:processor'
    implementation math

    implementation rxjava

    compileOnly lombok
    annotationProcessor lombok
    testCompileOnly lombok
    testAnnotationProcessor lombok

    implementation config

    implementation caffeine

    //implementation guice
    //implementation violet

    implementation mongo
}

/*shadowJar {
    archiveName("${mod_name}-${mc_version}-${mod_version}.jar")

    // Only shadow fluent-hc
    dependencies {
        include('org.apache.httpcomponents:fluent-hc:.*')
        include(config)
        include(mongo)
        include(rxjava)
    }

    // Relocate fluent-hc to prevent conflicts with other mods that include it
    relocate 'org.apache.http.client.fluent', "${shawdow_dir}.org.apache.http.client.fluent"
    relocate rxjava, "${shawdow_dir}.${rxjava}"

    classifier '' // Replace the default JAR
}*/

/*reobf {
    shadowJar {} // Reobfuscate the shadowed JAR
}*/

shadowJar.finalizedBy(reobf)

The commented-out shadowJar parts at the bottom were my attempts at adapting Choonster's example that he provided in another forum post that was asking about obfuscating a shadowed jar. With that commendted out shadowJar task, I tried so many different 'combinations' and ideas, and frankly it never really made much of a difference in terms of my problem here. Thank you for any advice or help!

Edited February 1, 20223 yr by Jimmeh
Solved

In case anyone comes across this problem or has issues with shadow too, I followed this template and everything now works.