initial commit, command hooks, messenger and test command

.gitignore

@@ -0,0 +1,25 @@
+# gradle
+
+.gradle/
+build/
+out/
+classes/
+
+# idea
+
+.idea/
+*.iml
+*.ipr
+*.iws
+
+# vscode
+
+.settings/
+.vscode/
+bin/
+.classpath
+.project
+
+# fabric
+
+run/

LICENSE

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.

README.md

@@ -1,2 +1,3 @@
-# fabric-carpet
+# Fabric Carpet
-Carpets are made of fabric
+
+Cause all carpets are made of fabric?

build.gradle

@@ -0,0 +1,80 @@
+plugins {
+	id 'fabric-loom' version '0.2.2-SNAPSHOT'
+	id 'maven-publish'
+}
+
+sourceCompatibility = JavaVersion.VERSION_1_8
+targetCompatibility = JavaVersion.VERSION_1_8
+
+archivesBaseName = project.archives_base_name
+version = project.mod_version
+group = project.maven_group
+
+minecraft {
+}
+
+dependencies {
+	//to change the versions see the gradle.properties file
+	minecraft "com.mojang:minecraft:${project.minecraft_version}"
+	mappings "net.fabricmc:yarn:${project.yarn_mappings}"
+	modCompile "net.fabricmc:fabric-loader:${project.loader_version}"
+
+	// Fabric API. This is technically optional, but you probably want it anyway.
+	modCompile "net.fabricmc:fabric:${project.fabric_version}"
+
+	// PSA: Some older mods, compiled on Loom 0.2.1, might have outdated Maven POMs.
+	// You may need to force-disable transitiveness on them.
+}
+
+processResources {
+	inputs.property "version", project.version
+
+	from(sourceSets.main.resources.srcDirs) {
+		include "fabric.mod.json"
+		expand "version": project.version
+	}
+
+	from(sourceSets.main.resources.srcDirs) {
+		exclude "fabric.mod.json"
+	}
+}
+
+// ensure that the encoding is set to UTF-8, no matter what the system default is
+// this fixes some edge cases with special characters not displaying correctly
+// see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
+tasks.withType(JavaCompile) {
+	options.encoding = "UTF-8"
+}
+
+// Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
+// if it is present.
+// If you remove this task, sources will not be generated.
+task sourcesJar(type: Jar, dependsOn: classes) {
+	classifier = "sources"
+	from sourceSets.main.allSource
+}
+
+jar {
+	from "LICENSE"
+}
+
+// configure the maven publication
+publishing {
+	publications {
+		mavenJava(MavenPublication) {
+			// add all the jars that should be included when publishing to maven
+			artifact(jar) {
+				builtBy remapJar
+			}
+			artifact(sourcesJar) {
+				builtBy remapSourcesJar
+			}
+		}
+	}
+
+	// select the repositories you want to publish to
+	repositories {
+		// uncomment to publish to the local maven
+		// mavenLocal()
+	}
+}

gradle.properties

@@ -0,0 +1,17 @@
+# Done to increase the memory available to gradle.
+org.gradle.jvmargs=-Xmx1G
+
+# Fabric Properties
+	# check these on https://fabricmc.net/use
+	minecraft_version=1.14.1 Pre-Release 2
+	yarn_mappings=1.14.1 Pre-Release 2+build.1
+	loader_version=0.4.6+build.143
+
+# Mod Properties
+	mod_version = 1.0.0
+	maven_group = carpet
+	archives_base_name = fabric-carpet
+
+# Dependencies
+	# currently not on the main fabric site, check on the maven: https://maven.fabricmc.net/net/fabricmc/fabric
+	fabric_version=0.2.7+build.127

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,10 @@
+pluginManagement {
+    repositories {
+        jcenter()
+        maven {
+            name = 'Fabric'
+            url = 'https://maven.fabricmc.net/'
+        }
+        gradlePluginPortal()
+    }
+}

src/main/java/carpet/CarpetServer.java

@@ -0,0 +1,69 @@
+package carpet;
+
+//import carpet.commands.CameraModeCommand;
+//import carpet.commands.CarpetCommand;
+//import carpet.commands.CounterCommand;
+//import carpet.commands.DistanceCommand;
+//import carpet.commands.DrawCommand;
+//import carpet.commands.ScriptCommand;
+//import carpet.commands.InfoCommand;
+//import carpet.commands.LogCommand;
+//import carpet.commands.PerimeterInfoCommand;
+//import carpet.commands.PlayerCommand;
+//import carpet.commands.SpawnCommand;
+import carpet.commands.TestCommand;
+//import carpet.commands.TickCommand;
+//import carpet.logging.LoggerRegistry;
+//import carpet.script.ExpressionInspector;
+//import carpet.utils.HUDController;
+
+import java.util.Random;
+
+//import carpet.helpers.TickSpeed;
+import com.mojang.brigadier.CommandDispatcher;
+import net.minecraft.server.command.ServerCommandSource;
+import net.minecraft.server.MinecraftServer;
+
+public class CarpetServer // static for now - easier to handle all around the code, its one anyways
+{
+    public static final Random rand = new Random((int)((2>>16)*Math.random()));
+    public static MinecraftServer minecraft_server;
+    public static void init(MinecraftServer server) //aka constructor of this static singleton class
+    {
+        CarpetServer.minecraft_server = server;
+    }
+    public static void onServerLoaded(MinecraftServer server)
+    {
+        //CarpetSettings.apply_settings_from_conf(server);
+        //ExpressionInspector.CarpetExpression_resetExpressionEngine();
+    }
+    // Separate from onServerLoaded, because a server can be loaded multiple times in singleplayer
+    public static void onGameStarted() {
+        //LoggerRegistry.initLoggers();
+    }
+
+    public static void tick(MinecraftServer server)
+    {
+        //TickSpeed.tick(server);
+        //HUDController.update_hud(server);
+    }
+
+    public static void registerCarpetCommands(CommandDispatcher<ServerCommandSource> dispatcher)
+    {
+        //CarpetCommand.register(dispatcher);
+        //TickCommand.register(dispatcher);
+        //CounterCommand.register(dispatcher);
+        //LogCommand.register(dispatcher);
+        //SpawnCommand.register(dispatcher);
+        //PlayerCommand.register(dispatcher);
+        //CameraModeCommand.register(dispatcher);
+        //InfoCommand.register(dispatcher);
+        //DistanceCommand.register(dispatcher);
+        //PerimeterInfoCommand.register(dispatcher);
+        //DrawCommand.register(dispatcher);
+        //ScriptCommand.register(dispatcher);
+
+        TestCommand.register(dispatcher);
+    }
+}
+

src/main/java/carpet/commands/TestCommand.java

@@ -0,0 +1,29 @@
+package carpet.commands;
+
+import carpet.utils.Messenger;
+import com.mojang.brigadier.CommandDispatcher;
+import com.mojang.brigadier.context.CommandContext;
+import net.minecraft.server.command.ServerCommandSource;
+
+import static com.mojang.brigadier.arguments.StringArgumentType.getString;
+import static com.mojang.brigadier.arguments.StringArgumentType.word;
+import static net.minecraft.server.command.CommandManager.argument;
+import static net.minecraft.server.command.CommandManager.literal;
+
+public class TestCommand
+{
+    public static void register(CommandDispatcher<ServerCommandSource> dispatcher)
+    {
+        dispatcher.register(literal("test").
+                then(argument("first",word()).
+                        executes( (c)-> test(c, getString(c, "first")+" 1"))).
+                then(argument("second", word()).
+                        executes( (c)-> test(c, getString(c, "second")+" 2"))));
+    }
+
+    private static int test(CommandContext<ServerCommandSource> c, String term)
+    {
+        Messenger.m(c.getSource(),"w term is: ",term.substring(0,1)+"b "+term);
+        return 1;
+    }
+}

src/main/java/carpet/mixins/CommandManagerMixin.java

@@ -0,0 +1,27 @@
+package carpet.mixins;
+
+import carpet.CarpetServer;
+import com.mojang.brigadier.CommandDispatcher;
+import net.minecraft.server.command.CommandManager;
+import net.minecraft.server.command.ServerCommandSource;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+
+@Mixin(CommandManager.class)
+public abstract class CommandManagerMixin
+{
+
+    @Shadow
+    @Final
+    private CommandDispatcher<ServerCommandSource> dispatcher;
+
+    @Inject(method = "<init>", at = @At("RETURN"))
+    private void onRegister(boolean boolean_1, CallbackInfo ci) {
+        CarpetServer.registerCarpetCommands(this.dispatcher);
+    }
+}

src/main/java/carpet/utils/Messenger.java

@@ -0,0 +1,299 @@
+package carpet.utils;
+
+import net.minecraft.server.command.ServerCommandSource;
+import net.minecraft.entity.EntityCategory;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.network.chat.TextComponent;
+import net.minecraft.ChatFormat;
+import net.minecraft.network.chat.BaseComponent;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.network.chat.ClickEvent;//   text.event.ClickEvent;
+import net.minecraft.network.chat.HoverEvent;//    text.event.HoverEvent;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+public class Messenger
+{
+    public static final Logger LOG = LogManager.getLogger();
+
+    /*
+     messsage: "desc me ssa ge"
+     desc contains:
+     i = italic
+     s = strikethrough
+     u = underline
+     b = bold
+     o = obfuscated
+
+     w = white
+     y = yellow
+     m = magenta (light purple)
+     r = red
+     c = cyan (aqua)
+     l = lime (green)
+     t = light blue (blue)
+     f = dark gray
+     g = gray
+     d = gold
+     p = dark purple (purple)
+     n = dark red (brown)
+     q = dark aqua
+     e = dark green
+     v = dark blue (navy)
+     k = black
+
+     / = action added to the previous component
+     */
+
+    private static BaseComponent _applyStyleToTextComponent(BaseComponent comp, String style)
+    {
+        //could be rewritten to be more efficient
+        comp.getStyle().setItalic(style.indexOf('i')>=0);
+        comp.getStyle().setStrikethrough(style.indexOf('s')>=0);
+        comp.getStyle().setUnderline(style.indexOf('u')>=0);
+        comp.getStyle().setBold(style.indexOf('b')>=0);
+        comp.getStyle().setObfuscated(style.indexOf('o')>=0);
+        comp.getStyle().setColor(ChatFormat.WHITE);
+        if (style.indexOf('w')>=0) comp.getStyle().setColor(ChatFormat.WHITE); // not needed
+        if (style.indexOf('y')>=0) comp.getStyle().setColor(ChatFormat.YELLOW);
+        if (style.indexOf('m')>=0) comp.getStyle().setColor(ChatFormat.LIGHT_PURPLE);
+        if (style.indexOf('r')>=0) comp.getStyle().setColor(ChatFormat.RED);
+        if (style.indexOf('c')>=0) comp.getStyle().setColor(ChatFormat.AQUA);
+        if (style.indexOf('l')>=0) comp.getStyle().setColor(ChatFormat.GREEN);
+        if (style.indexOf('t')>=0) comp.getStyle().setColor(ChatFormat.BLUE);
+        if (style.indexOf('f')>=0) comp.getStyle().setColor(ChatFormat.DARK_GRAY);
+        if (style.indexOf('g')>=0) comp.getStyle().setColor(ChatFormat.GRAY);
+        if (style.indexOf('d')>=0) comp.getStyle().setColor(ChatFormat.GOLD);
+        if (style.indexOf('p')>=0) comp.getStyle().setColor(ChatFormat.DARK_PURPLE);
+        if (style.indexOf('n')>=0) comp.getStyle().setColor(ChatFormat.DARK_RED);
+        if (style.indexOf('q')>=0) comp.getStyle().setColor(ChatFormat.DARK_AQUA);
+        if (style.indexOf('e')>=0) comp.getStyle().setColor(ChatFormat.DARK_GREEN);
+        if (style.indexOf('v')>=0) comp.getStyle().setColor(ChatFormat.DARK_BLUE);
+        if (style.indexOf('k')>=0) comp.getStyle().setColor(ChatFormat.BLACK);
+        return comp;
+    }
+    public static String heatmap_color(double actual, double reference)
+    {
+        String color = "e";
+        if (actual > 0.5D*reference) color = "y";
+        if (actual > 0.8D*reference) color = "r";
+        if (actual > reference) color = "m";
+        return color;
+    }
+    public static String creatureTypeColor(EntityCategory type)
+    {
+        switch (type)
+        {
+            case MONSTER:
+                return "n";
+            case CREATURE:
+                return "e";
+            case AMBIENT:
+                return "f";
+            case WATER_CREATURE:
+                return "v";
+        }
+        return "w";
+    }
+
+    private static BaseComponent _getChatComponentFromDesc(String message, BaseComponent previous_message)
+    {
+        if (message.equalsIgnoreCase(""))
+        {
+            return new TextComponent("");
+        }
+        String parts[] = message.split("\\s", 2);
+        String desc = parts[0];
+        String str = "";
+        if (parts.length > 1) str = parts[1];
+        if (desc.charAt(0) == '/') // deprecated
+        {
+            if (previous_message != null)
+                previous_message.getStyle().setClickEvent(new ClickEvent(ClickEvent.Action.SUGGEST_COMMAND, message));
+            return previous_message;
+        }
+        if (desc.charAt(0) == '?')
+        {
+            if (previous_message != null)
+                previous_message.getStyle().setClickEvent(new ClickEvent(ClickEvent.Action.SUGGEST_COMMAND, message.substring(1)));
+            return previous_message;
+        }
+        if (desc.charAt(0) == '!')
+        {
+            if (previous_message != null)
+                previous_message.getStyle().setClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, message.substring(1)));
+            return previous_message;
+        }
+        if (desc.charAt(0) == '^')
+        {
+            if (previous_message != null)
+                previous_message.getStyle().setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, c(message.substring(1))));
+            return previous_message;
+        }
+        BaseComponent txt = new TextComponent(str);
+        return _applyStyleToTextComponent(txt, desc);
+    }
+    public static BaseComponent tp(String desc, Vec3d pos) { return tp(desc, pos.x, pos.y, pos.z); }
+    public static BaseComponent tp(String desc, BlockPos pos) { return tp(desc, pos.getX(), pos.getY(), pos.getZ()); }
+    public static BaseComponent tp(String desc, double x, double y, double z) { return tp(desc, (float)x, (float)y, (float)z);}
+    public static BaseComponent tp(String desc, float x, float y, float z)
+    {
+        return _getCoordsTextComponent(desc, x, y, z, false);
+    }
+    public static BaseComponent tp(String desc, int x, int y, int z)
+    {
+        return _getCoordsTextComponent(desc, (float)x, (float)y, (float)z, true);
+    }
+
+    /// to be continued
+    public static BaseComponent dbl(String style, double double_value)
+    {
+        return c(String.format("%s %.1f",style,double_value),String.format("^w %f",double_value));
+    }
+    public static BaseComponent dbls(String style, double ... doubles)
+    {
+        StringBuilder str = new StringBuilder(style + " [ ");
+        String prefix = "";
+        for (double dbl : doubles)
+        {
+            str.append(String.format("%s%.1f", prefix, dbl));
+            prefix = ", ";
+        }
+        str.append(" ]");
+        return c(str.toString());
+    }
+    public static BaseComponent dblf(String style, double ... doubles)
+    {
+        StringBuilder str = new StringBuilder(style + " [ ");
+        String prefix = "";
+        for (double dbl : doubles)
+        {
+            str.append(String.format("%s%f", prefix, dbl));
+            prefix = ", ";
+        }
+        str.append(" ]");
+        return c(str.toString());
+    }
+    public static BaseComponent dblt(String style, double ... doubles)
+    {
+        List<Object> components = new ArrayList<>();
+        components.add(style+" [ ");
+        String prefix = "";
+        for (double dbl:doubles)
+        {
+
+            components.add(String.format("%s %s%.1f",style, prefix, dbl));
+            components.add("?"+dbl);
+            components.add("^w "+dbl);
+            prefix = ", ";
+        }
+        //components.remove(components.size()-1);
+        components.add(style+"  ]");
+        return c(components.toArray(new Object[0]));
+    }
+
+    private static BaseComponent _getCoordsTextComponent(String style, float x, float y, float z, boolean isInt)
+    {
+        String text;
+        String command;
+        if (isInt)
+        {
+            text = String.format("%s [ %d, %d, %d ]",style, (int)x,(int)y, (int)z );
+            command = String.format("!/tp %d %d %d",(int)x,(int)y, (int)z);
+        }
+        else
+        {
+            text = String.format("%s [ %.1f, %.1f, %.1f]",style, x, y, z);
+            command = String.format("!/tp %.3f %.3f %.3f",x, y, z);
+        }
+        return c(text, command);
+    }
+
+    //message source
+    public static void m(ServerCommandSource source, Object ... fields)
+    {
+        source. sendFeedback(Messenger.c(fields),true);
+    }
+    public static void m(PlayerEntity player, Object ... fields)
+    {
+        player.sendMessage(Messenger.c(fields));
+    }
+
+    /*
+    composes single line, multicomponent message, and returns as one chat messagge
+     */
+    public static BaseComponent c(Object ... fields)
+    {
+        BaseComponent message = new TextComponent("");
+        BaseComponent previous_component = null;
+        for (Object o: fields)
+        {
+            if (o instanceof BaseComponent)
+            {
+                message.append((BaseComponent)o);
+                previous_component = (BaseComponent)o;
+                continue;
+            }
+            String txt = o.toString();
+            BaseComponent comp = _getChatComponentFromDesc(txt,previous_component);
+            if (comp != previous_component) message.append(comp);
+            previous_component = comp;
+        }
+        return message;
+    }
+
+    //simple text
+
+    public static BaseComponent s(String text)
+    {
+        return s(text,"");
+    }
+    public static BaseComponent s(String text, String style)
+    {
+        BaseComponent message = new TextComponent(text);
+        _applyStyleToTextComponent(message, style);
+        return message;
+    }
+
+
+
+
+    public static void send(PlayerEntity player, Collection<BaseComponent> lines)
+    {
+        lines.forEach(player::sendMessage);
+    }
+    public static void send(ServerCommandSource source, Collection<BaseComponent> lines)
+    {
+        lines.stream().forEachOrdered((s) -> source.sendFeedback(s, false));
+    }
+
+
+    public static void print_server_message(MinecraftServer server, String message)
+    {
+        if (server == null)
+            LOG.error("Message not delivered: "+message);
+        server.sendMessage(new TextComponent(message));
+        BaseComponent txt = c("gi "+message);
+        for (PlayerEntity entityplayer : server.getPlayerManager().getPlayerList())
+        {
+            entityplayer.sendMessage(txt);
+        }
+    }
+    public static void print_server_message(MinecraftServer server, BaseComponent message)
+    {
+        if (server == null)
+            LOG.error("Message not delivered: "+message.getString());
+        server.sendMessage(message);
+        for (PlayerEntity entityplayer : server.getPlayerManager().getPlayerList())
+        {
+            entityplayer.sendMessage(message);
+        }
+    }
+}
+

src/main/java/net/fabricmc/example/ExampleMod.java

@@ -0,0 +1,14 @@
+package net.fabricmc.example;
+
+import net.fabricmc.api.ModInitializer;
+
+public class ExampleMod implements ModInitializer {
+	@Override
+	public void onInitialize() {
+		// This code runs as soon as Minecraft is in a mod-load-ready state.
+		// However, some things (like resources) may still be uninitialized.
+		// Proceed with mild caution.
+
+		System.out.println("Hello Fabric world!");
+	}
+}

src/main/java/net/fabricmc/example/mixin/ExampleMixin.java

@@ -0,0 +1,15 @@
+package net.fabricmc.example.mixin;
+
+import net.minecraft.client.MinecraftClient;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(MinecraftClient.class)
+public class ExampleMixin {
+	@Inject(at = @At("HEAD"), method = "init()V")
+	private void init(CallbackInfo info) {
+		System.out.println("This line is printed by an example mod mixin!");
+	}
+}

src/main/resources/fabric.mod.json

@@ -0,0 +1,36 @@
+{
+  "schemaVersion": 1,
+  "id": "modid",
+  "version": "${version}",
+
+  "name": "Example Mod",
+  "description": "This is an example description! Tell everyone what your mod is about!",
+  "authors": [
+    "Me!"
+  ],
+  "contact": {
+    "homepage": "https://fabricmc.net/",
+    "sources": "https://github.com/FabricMC/fabric-example-mod"
+  },
+
+  "license": "CC0-1.0",
+  "icon": "assets/modid/icon.png",
+
+  "environment": "*",
+  "entrypoints": {
+    "main": [
+      "net.fabricmc.example.ExampleMod"
+    ]
+  },
+  "mixins": [
+    "modid.mixins.json"
+  ],
+
+  "requires": {
+    "fabricloader": ">=0.4.0",
+    "fabric": "*"
+  },
+  "suggests": {
+    "flamingo": "*"
+  }
+}

src/main/resources/modid.mixins.json

@@ -0,0 +1,14 @@
+{
+  "required": true,
+  "package": "carpet.mixins",
+  "compatibilityLevel": "JAVA_8",
+  "mixins": [
+    "CommandManagerMixin"
+  ],
+  "client": [
+    "CommandManagerMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}