It is finally out I guess

.gitattributes

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+# Keep CRLF for *.bat files which are for Windows.
+# Ref: https://stackoverflow.com/questions/21822650
+*.bat -crlf

.github/workflows/release.yml

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+name: release
+on:
+  push:
+    tags:
+      - "**"
+jobs:
+  publish:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          # Fetch all history 
+          fetch-depth: 0
+      - name: Maven Publish
+        id: maven_publish
+        env:
+          MAVEN_USERNAME: ${{ secrets.TEACON_USERNAME }}
+          MAVEN_PASSWORD: ${{ secrets.TEACON_PASSWORD }}
+        run: ./gradlew publishReleasePublicationToArchiveRepository githubActionOutput
+      - name: Generate Changelog
+        id: changelog
+        shell: bash
+        env:
+          CURRENT: ${{ github.ref }}
+        # Special thanks to this post on Stack Overflow regarding change set between two tags:
+        # https://stackoverflow.com/questions/12082981
+        # Do note that actions/checkout will enter detach mode by default, so you won't have 
+        # access to HEAD ref. Use GitHub-Action-supplied `github.ref` instead.
+        # Special thanks to this issue ticket regarding escaping newline:
+        # https://github.com/actions/create-release/issues/25
+        # We use Bash parameter expansion to do find-and-replace.
+        # https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html
+        # Also we cannot use git rev-list because it always prepend "commit <hash>"
+        # See https://stackoverflow.com/questions/36927089/
+        run: |
+          current_tag=${CURRENT/refs\/tags\//}
+          last_tag=`git describe --tags --abbrev=0 "$current_tag"^ 2>/dev/null || echo`
+          if [ last_tag ]; then
+          changelog=`git log --pretty="format:%H: %s" ${last_tag}..$current_tag`
+          else
+          changelog=`git log --pretty="format:%H: %s"`
+          fi
+          changelog="${changelog//'%'/'%25'}"
+          changelog="${changelog//$'\n'/'  %0A'}"
+          echo "::set-output name=value::Change set since ${last_tag:-the beginning}:  %0A%0A$changelog"
+      - name: GitHub Release
+        id: create_release
+        uses: actions/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          draft: false
+          prerelease: false
+          body: |
+            ${{ steps.changelog.outputs.value }}
+      - name: GitHub Release Artifact
+        uses: actions/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ${{ steps.maven_publish.outputs.artifact_path }}
+          asset_name: ${{ steps.maven_publish.outputs.artifact_name }}
+          # https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types
+          asset_content_type: "application/java-archive"

.github/workflows/test-build.yml

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+name: test-build
+on:
+  push:
+    paths:
+      - "src/**"
+      - "build.gradle"
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Build
+        run: ./gradlew build --stacktrace

.gitignore

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+# eclipse
+bin
+*.launch
+.settings
+.metadata
+.classpath
+.project
+
+# idea
+out
+*.ipr
+*.iws
+*.iml
+.idea
+
+# vscode
+.vscode
+
+# gradle
+build
+.gradle
+
+# other
+eclipse
+run
+*.txt
+

LICENSE

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+Copyright (c) 2020, TeaConMC members and contributors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the TeaConMC nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL TEACONMC MEMBERS AND CONTRIBUTORS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

build.gradle

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+import java.time.Instant
+import java.time.format.DateTimeFormatter
+import java.time.temporal.ChronoUnit
+
+buildscript {
+    repositories {
+        maven { url = 'https://files.minecraftforge.net/maven' }
+        jcenter()
+        mavenCentral()
+    }
+    dependencies {
+        classpath group: 'net.minecraftforge.gradle', name: 'ForgeGradle', version: '3.+', changing: true
+    }
+}
+apply plugin: 'net.minecraftforge.gradle'
+apply plugin: 'eclipse'
+apply plugin: 'maven-publish'
+
+version = '0.1.0'
+group = 'org.teacon'
+archivesBaseName = 'AreaControl-Forge-1.15'
+
+sourceCompatibility = targetCompatibility = compileJava.sourceCompatibility = compileJava.targetCompatibility = '1.8'
+
+minecraft {
+    mappings channel: 'snapshot', version: '20200513-1.15.1'
+
+    runs {
+        client {
+            workingDirectory project.file('run')
+            property 'forge.logging.console.level', 'info'
+            mods {
+                area_control {
+                    source sourceSets.main
+                }
+            }
+        }
+
+        server {
+            workingDirectory project.file('run_server')
+            property 'forge.logging.console.level', 'info'
+            mods {
+                area_control {
+                    source sourceSets.main
+                }
+            }
+        }
+
+        data {
+            workingDirectory project.file('run')
+            property 'forge.logging.console.level', 'info'
+            args '--mod', 'area_control', '--all', '--output', file('src/generated/resources/')
+            mods {
+                area_control {
+                    source sourceSets.main
+                }
+            }
+        }
+    }
+}
+
+dependencies {
+    minecraft 'net.minecraftforge:forge:1.15.2-31.2.4'
+}
+
+jar {
+    manifest {
+        attributes([
+            "Specification-Title": "Area-Control",
+            "Specification-Vendor": "TeaConMC",
+            "Specification-Version": "1",
+            "Implementation-Title": project.name,
+            "Implementation-Version": "${version}",
+            "Implementation-Vendor": "TeaConMC",
+            "Implementation-Timestamp": DateTimeFormatter.ISO_INSTANT.format(Instant.now().truncatedTo(ChronoUnit.SECONDS))
+        ])
+    }
+}
+
+def reobfFile = file("$buildDir/reobfJar/output.jar")
+def reobfArtifact = artifacts.add('default', reobfFile) {
+    type 'jar'
+    builtBy 'reobfJar'
+}
+publishing {
+    publications {
+        release(MavenPublication) {
+            groupId = "org.teacon"
+            artifactId = "AreaControl-Forge-1.15"
+
+            artifact reobfArtifact
+            pom {
+                name = 'AreaControl for Minecraft 1.15'
+                description = 'Comprehensive (maybe) plot management mod'
+                url = 'https://github.com/teaconmc/AreaControl'
+                licenses {
+                    license {
+                        name = 'BSD-3-Clause'
+                        url = 'https://github.com/teaconmc/AreaControl/blob/1.15-forge/LICENSE'
+                    }
+                }
+                developers {
+                    developer {
+                        id = '3TUSK'
+                        name = '3TUSK'
+                    }
+                }
+                issueManagement {
+                    system = 'GitHub Issues'
+                    url = 'https://github.com/teaconmc/AreaControl/issues'
+                }
+                scm {
+                    url = 'https://github.com/teaconmc/AreaControl'
+                    connection = 'scm:git:git://github.com/teaconmc/AreaControl.git'
+                    developerConnection = 'scm:git:[email protected]:teaconmc/AreaControl.git'
+                }
+            }
+        }
+    }
+    repositories {
+        maven {
+            name = "archive"
+            url = "https://maven.hub.tritusk.info/releases"
+            credentials {
+                username = System.env.MAVEN_USERNAME
+                password = System.env.MAVEN_PASSWORD
+            }
+        }
+    }
+}
+
+tasks.withType(PublishToMavenRepository) {
+    onlyIf {
+        System.env.MAVEN_USERNAME && System.env.MAVEN_PASSWORD
+    }
+}
+
+/**
+ * A simple task to pass down the artifact name and path to other GitHub actions.
+ */
+task("githubActionOutput") {
+    onlyIf {
+        System.env.GITHUB_ACTIONS
+    }
+    doLast {
+        println "::set-output name=artifact_path::$buildDir/reobfJar/output.jar"
+        println "::set-output name=artifact_name::$archivesBaseName-${version}.jar"
+    }
+}

gradle.properties

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+# Ensure enough heap space during deployment
+org.gradle.jvmargs=-Xmx3G
+# It is said that daemon often brings more issues, so we disable it.
+org.gradle.daemon=false

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.9-bin.zip