Merge branch 'mc-1.15.x' into mc-1.16.x

build.gradle

@@ -4,7 +4,7 @@ buildscript {
         mavenCentral()
         maven {
             name = "forge"
-            url = "https://files.minecraftforge.net/maven"
+            url = "https://maven.minecraftforge.net"
         }
         maven {
             name = "Sponge (Mixin)"
@@ -14,7 +14,7 @@ buildscript {
     }
     dependencies {
         classpath 'com.google.code.gson:gson:2.8.1'
-        classpath 'net.minecraftforge.gradle:ForgeGradle:4.1.3'
+        classpath 'net.minecraftforge.gradle:ForgeGradle:4.1.9'
         classpath 'net.sf.proguard:proguard-gradle:6.1.0beta2'
         classpath 'org.spongepowered:mixingradle:0.7-SNAPSHOT'
     }
@@ -23,6 +23,7 @@ buildscript {
 plugins {
     id "checkstyle"
     id "jacoco"
+    id "maven-publish"
     id "com.github.hierynomus.license" version "0.15.0"
     id "com.matthewprenger.cursegradle" version "1.4.0"
     id "com.github.breadmoirai.github-release" version "2.2.12"
@@ -31,8 +32,6 @@ plugins {
 
 apply plugin: 'net.minecraftforge.gradle'
 apply plugin: 'org.spongepowered.mixin'
-apply plugin: 'maven-publish'
-apply plugin: 'maven'
 
 version = mod_version
 
@@ -43,6 +42,9 @@ java {
     toolchain {
         languageVersion = JavaLanguageVersion.of(8)
     }
+
+    withSourcesJar()
+    withJavadocJar()
 }
 
 minecraft {
@@ -127,7 +129,6 @@ repositories {
 configurations {
     shade
     compile.extendsFrom shade
-    deployerJars
     cctJavadoc
 }
 
@@ -153,8 +154,7 @@ dependencies {
     testImplementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.3.72'
     testImplementation 'org.jetbrains.kotlin:kotlin-reflect:1.3.72'
     testImplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.8'
-
+    testAnnotationProcessor 'org.spongepowered:mixin:0.8.2:processor'
-    deployerJars "org.apache.maven.wagon:wagon-ssh:3.0.0"
 
     cctJavadoc 'cc.tweaked:cct-javadoc:1.3.0'
 }
@@ -183,8 +183,6 @@ task luaJavadoc(type: Javadoc) {
 }
 
 jar {
-    dependsOn javadoc
-
     manifest {
         attributes(["Specification-Title": "computercraft",
                     "Specification-Vendor": "SquidDev",
@@ -195,10 +193,6 @@ jar {
                     "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ")])
     }
 
-    from (sourceSets.main.allSource) {
-        include "dan200/computercraft/api/**/*.java"
-    }
-
     from configurations.shade.collect { it.isDirectory() ? it : zipTree(it) }
 }
 
@@ -568,51 +562,41 @@ curseforge {
 
 publishing {
     publications {
-        mavenJava(MavenPublication) {
+        maven(MavenPublication) {
             from components.java
-            // artifact sourceJar
-        }
-    }
-}
 
-uploadArchives {
+            pom {
-    repositories {
+                name = 'CC: Tweaked'
-        if(project.hasProperty('mavenUploadUrl')) {
+                description = 'CC: Tweaked is a fork of ComputerCraft, adding programmable computers, turtles and more to Minecraft.'
-            mavenDeployer {
+                url = 'https://github.com/SquidDev-CC/CC-Tweaked'
-                configuration = configurations.deployerJars
-
-                repository(url: project.property('mavenUploadUrl')) {
-                    authentication(
-                        userName: project.property('mavenUploadUser'),
-                        privateKey: project.property('mavenUploadKey'))
-                }
-
-                pom.project {
-                    name 'CC: Tweaked'
-                    packaging 'jar'
-                    description 'CC: Tweaked is a fork of ComputerCraft, adding programmable computers, turtles and more to Minecraft.'
-                    url 'https://github.com/SquidDev-CC/CC-Tweaked'
 
                 scm {
-                        url 'https://github.com/SquidDev-CC/CC-Tweaked.git'
+                    url = 'https://github.com/SquidDev-CC/CC-Tweaked.git'
                 }
 
                 issueManagement {
-                        system 'github'
+                    system = 'github'
-                        url 'https://github.com/SquidDev-CC/CC-Tweaked/issues'
+                    url = 'https://github.com/SquidDev-CC/CC-Tweaked/issues'
                 }
 
                 licenses {
                     license {
-                            name 'ComputerCraft Public License, Version 1.0'
+                        name = 'ComputerCraft Public License, Version 1.0'
-                            url 'https://github.com/SquidDev-CC/CC-Tweaked/blob/master/LICENSE'
+                        url = 'https://github.com/SquidDev-CC/CC-Tweaked/blob/mc-1.15.x/LICENSE'
-                            distribution 'repo'
+                    }
+                }
             }
         }
     }
 
-                pom.whenConfigured { pom ->
+    repositories {
-                    pom.dependencies.clear()
+        if (project.hasProperty("mavenUser")) {
+            maven {
+                name = "SquidDev"
+                url = "https://squiddev.cc/maven"
+                credentials {
+                    username = project.property("mavenUser") as String
+                    password = project.property("mavenPass") as String
                 }
             }
         }
@@ -643,7 +627,7 @@ githubRelease {
     prerelease false
 }
 
-def uploadTasks = ["uploadArchives", "curseforge", "githubRelease"]
+def uploadTasks = ["publish", "curseforge", "githubRelease"]
 uploadTasks.forEach { tasks.getByName(it).dependsOn checkRelease }
 
 task uploadAll(dependsOn: uploadTasks) {

doc/stub/turtle.lua

@@ -1 +1,13 @@
+--[[- Craft a recipe based on the turtle's inventory.
+
+The turtle's inventory should set up like a crafting grid. For instance, to
+craft sticks, slots 1 and 5 should contain sticks. _All_ other slots should be
+empty, including those outside the crafting "grid".
+
+@tparam[opt=64] number limit The maximum number of crafting steps to run.
+@throws When limit is less than 1 or greater than 64.
+@treturn[1] true If crafting succeeds.
+@treturn[2] false If crafting fails.
+@treturn string A string describing why crafting failed.
+]]
 function craft(limit) end

illuaminate.sexp

@@ -88,27 +88,16 @@
 
 ;; Suppress warnings for currently undocumented modules.
 (at
-  (; Java APIs
+  (; Lua APIs
-   /doc/stub/http.lua
-   /doc/stub/os.lua
-   /doc/stub/turtle.lua
-   /doc/stub/global.lua
-   ; Java generated APIs
-   /build/docs/luaJavadoc/turtle.lua
-   ; Peripherals
-   /build/docs/luaJavadoc/drive.lua
-   /build/docs/luaJavadoc/speaker.lua
-   /build/docs/luaJavadoc/printer.lua
-   ; Generic peripherals
-   /build/docs/luaJavadoc/fluid_storage.lua
-   ; Lua APIs
    /src/main/resources/*/computercraft/lua/rom/apis/io.lua
    /src/main/resources/*/computercraft/lua/rom/apis/window.lua)
 
   (linters -doc:undocumented -doc:undocumented-arg -doc:undocumented-return))
 
-;; Suppress warnings for the BIOS using its own deprecated members for now.
+;; Suppress warnings for various APIs using its own deprecated members.
-(at /src/main/resources/*/computercraft/lua/bios.lua
+(at
+  (/src/main/resources/*/computercraft/lua/bios.lua
+   /src/main/resources/*/computercraft/lua/rom/apis/turtle/turtle.lua)
   (linters -var:deprecated))
 
 (at /src/test/resources/test-rom

src/main/java/dan200/computercraft/api/ComputerCraftAPI.java

@@ -98,7 +98,9 @@ public final class ComputerCraftAPI
      * resource folder onto a computer's file system.
      *
      * The files in this mount will be a combination of files in all mod jar, and data packs that contain
-     * resources with the same domain and path.
+     * resources with the same domain and path. For instance, ComputerCraft's resources are stored in
+     * "/data/computercraft/lua/rom". We construct a mount for that with
+     * {@code createResourceMount("computercraft", "lua/rom")}.
      *
      * @param domain  The domain under which to look for resources. eg: "mymod".
      * @param subPath The subPath under which to look for resources. eg: "lua/myfiles".

src/main/java/dan200/computercraft/core/filesystem/ResourceMount.java

@@ -103,9 +103,13 @@ public final class ResourceMount implements IMount
     private void load()
     {
         boolean hasAny = false;
+        String existingNamespace = null;
+
         FileEntry newRoot = new FileEntry( new ResourceLocation( namespace, subPath ) );
         for( ResourceLocation file : manager.listResources( subPath, s -> true ) )
         {
+            existingNamespace = file.getNamespace();
+
             if( !file.getNamespace().equals( namespace ) ) continue;
 
             String localPath = FileSystem.toLocal( file.getPath(), subPath );
@@ -114,6 +118,15 @@ public final class ResourceMount implements IMount
         }
 
         root = hasAny ? newRoot : null;
+
+        if( !hasAny )
+        {
+            ComputerCraft.log.warn( "Cannot find any files under /data/{}/{} for resource mount.", namespace, subPath );
+            if( newRoot != null )
+            {
+                ComputerCraft.log.warn( "There are files under /data/{}/{} though. Did you get the wrong namespace?", existingNamespace, subPath );
+            }
+        }
     }
 
     private FileEntry get( String path )

src/main/java/dan200/computercraft/core/terminal/TextBuffer.java

@@ -12,46 +12,12 @@ public class TextBuffer
     public TextBuffer( char c, int length )
     {
         text = new char[length];
-        for( int i = 0; i < length; i++ )
+        this.fill( c );
-        {
-            text[i] = c;
-        }
     }
 
     public TextBuffer( String text )
     {
-        this( text, 1 );
+        this.text = text.toCharArray();
-    }
-
-    public TextBuffer( String text, int repetitions )
-    {
-        int textLength = text.length();
-        this.text = new char[textLength * repetitions];
-        for( int i = 0; i < repetitions; i++ )
-        {
-            for( int j = 0; j < textLength; j++ )
-            {
-                this.text[j + i * textLength] = text.charAt( j );
-            }
-        }
-    }
-
-    public TextBuffer( TextBuffer text )
-    {
-        this( text, 1 );
-    }
-
-    public TextBuffer( TextBuffer text, int repetitions )
-    {
-        int textLength = text.length();
-        this.text = new char[textLength * repetitions];
-        for( int i = 0; i < repetitions; i++ )
-        {
-            for( int j = 0; j < textLength; j++ )
-            {
-                this.text[j + i * textLength] = text.charAt( j );
-            }
-        }
     }
 
     public int length()
@@ -59,39 +25,16 @@ public class TextBuffer
         return text.length;
     }
 
-    public String read()
-    {
-        return read( 0, text.length );
-    }
-
-    public String read( int start )
-    {
-        return read( start, text.length );
-    }
-
-    public String read( int start, int end )
-    {
-        start = Math.max( start, 0 );
-        end = Math.min( end, text.length );
-        int textLength = Math.max( end - start, 0 );
-        return new String( text, start, textLength );
-    }
-
     public void write( String text )
     {
-        write( text, 0, text.length() );
+        write( text, 0 );
     }
 
     public void write( String text, int start )
-    {
-        write( text, start, start + text.length() );
-    }
-
-    public void write( String text, int start, int end )
     {
         int pos = start;
         start = Math.max( start, 0 );
-        end = Math.min( end, pos + text.length() );
+        int end = Math.min( start + text.length(), pos + text.length() );
         end = Math.min( end, this.text.length );
         for( int i = start; i < end; i++ )
         {
@@ -101,23 +44,10 @@ public class TextBuffer
 
     public void write( TextBuffer text )
     {
-        write( text, 0, text.length() );
+        int end = Math.min( text.length(), this.text.length );
-    }
+        for( int i = 0; i < end; i++ )
-
-    public void write( TextBuffer text, int start )
         {
-        write( text, start, start + text.length() );
+            this.text[i] = text.charAt( i );
-    }
-
-    public void write( TextBuffer text, int start, int end )
-    {
-        int pos = start;
-        start = Math.max( start, 0 );
-        end = Math.min( end, pos + text.length() );
-        end = Math.min( end, this.text.length );
-        for( int i = start; i < end; i++ )
-        {
-            this.text[i] = text.charAt( i - pos );
         }
     }
 
@@ -126,11 +56,6 @@ public class TextBuffer
         fill( c, 0, text.length );
     }
 
-    public void fill( char c, int start )
-    {
-        fill( c, start, text.length );
-    }
-
     public void fill( char c, int start, int end )
     {
         start = Math.max( start, 0 );
@@ -141,52 +66,6 @@ public class TextBuffer
         }
     }
 
-    public void fill( String text )
-    {
-        fill( text, 0, this.text.length );
-    }
-
-    public void fill( String text, int start )
-    {
-        fill( text, start, this.text.length );
-    }
-
-    public void fill( String text, int start, int end )
-    {
-        int pos = start;
-        start = Math.max( start, 0 );
-        end = Math.min( end, this.text.length );
-
-        int textLength = text.length();
-        for( int i = start; i < end; i++ )
-        {
-            this.text[i] = text.charAt( (i - pos) % textLength );
-        }
-    }
-
-    public void fill( TextBuffer text )
-    {
-        fill( text, 0, this.text.length );
-    }
-
-    public void fill( TextBuffer text, int start )
-    {
-        fill( text, start, this.text.length );
-    }
-
-    public void fill( TextBuffer text, int start, int end )
-    {
-        int pos = start;
-        start = Math.max( start, 0 );
-        end = Math.min( end, this.text.length );
-
-        int textLength = text.length();
-        for( int i = start; i < end; i++ )
-        {
-            this.text[i] = text.charAt( (i - pos) % textLength );
-        }
-    }
-
     public char charAt( int i )
     {
         return text[i];

src/main/java/dan200/computercraft/shared/integration/jei/JEIComputerCraft.java

@@ -114,10 +114,10 @@ public class JEIComputerCraft implements IModPlugin
      */
     private static final ISubtypeInterpreter turtleSubtype = stack -> {
         Item item = stack.getItem();
-        if( !(item instanceof ITurtleItem) ) return "";
+        if( !(item instanceof ITurtleItem) ) return ISubtypeInterpreter.NONE;
 
         ITurtleItem turtle = (ITurtleItem) item;
-        StringBuilder name = new StringBuilder();
+        StringBuilder name = new StringBuilder( "turtle:" );
 
         // Add left and right upgrades to the identifier
         ITurtleUpgrade left = turtle.getUpgrade( stack, TurtleSide.LEFT );
@@ -134,9 +134,9 @@ public class JEIComputerCraft implements IModPlugin
      */
     private static final ISubtypeInterpreter pocketSubtype = stack -> {
         Item item = stack.getItem();
-        if( !(item instanceof ItemPocketComputer) ) return "";
+        if( !(item instanceof ItemPocketComputer) ) return ISubtypeInterpreter.NONE;
 
-        StringBuilder name = new StringBuilder();
+        StringBuilder name = new StringBuilder( "pocket:" );
 
         // Add the upgrade to the identifier
         IPocketUpgrade upgrade = ItemPocketComputer.getUpgrade( stack );
@@ -150,11 +150,11 @@ public class JEIComputerCraft implements IModPlugin
      */
     private static final ISubtypeInterpreter diskSubtype = stack -> {
         Item item = stack.getItem();
-        if( !(item instanceof ItemDisk) ) return "";
+        if( !(item instanceof ItemDisk) ) return ISubtypeInterpreter.NONE;
 
         ItemDisk disk = (ItemDisk) item;
 
         int colour = disk.getColour( stack );
-        return colour == -1 ? "" : String.format( "%06x", colour );
+        return colour == -1 ? ISubtypeInterpreter.NONE : String.format( "%06x", colour );
     };
 }

src/main/java/dan200/computercraft/shared/integration/jei/RecipeResolver.java

@@ -200,7 +200,7 @@ class RecipeResolver implements IRecipeManagerPlugin
             for( UpgradeInfo upgrade : upgrades )
             {
                 ItemStack craftingStack = upgrade.stack;
-                if( !craftingStack.isEmpty() && craftingStack.getItem() == stack.getItem() && upgrade.upgrade.isItemSuitable( stack ) )
+                if( craftingStack.isEmpty() || craftingStack.getItem() != stack.getItem() || !upgrade.upgrade.isItemSuitable( stack ) )
                 {
                     continue;
                 }
@@ -319,13 +319,6 @@ class RecipeResolver implements IRecipeManagerPlugin
             super( ID, null, width, height, input, output );
         }
 
-        @Nonnull
-        @Override
-        public ResourceLocation getId()
-        {
-            return null;
-        }
-
         @Nonnull
         @Override
         public IRecipeSerializer<?> getSerializer()

src/main/java/dan200/computercraft/shared/peripheral/generic/methods/FluidMethods.java

@@ -45,6 +45,19 @@ public class FluidMethods implements GenericSource
         return new ResourceLocation( ForgeVersion.MOD_ID, "fluid" );
     }
 
+    /**
+     * Get all "tanks" in this fluid storage.
+     *
+     * Each tank either contains some amount of fluid or is empty. Tanks with fluids inside will return some basic
+     * information about the fluid, including its name and amount.
+     *
+     * The returned table is sparse, and so empty tanks will be `nil` - it is recommended to loop over using `pairs`
+     * rather than `ipairs`.
+     *
+     * @param fluids The current fluid handler.
+     * @return All tanks.
+     * @cc.treturn { (table|nil)... } All tanks in this fluid storage.
+     */
     @LuaFunction( mainThread = true )
     public static Map<Integer, Map<String, ?>> tanks( IFluidHandler fluids )
     {
@@ -59,6 +72,22 @@ public class FluidMethods implements GenericSource
         return result;
     }
 
+    /**
+     * Move a fluid from one fluid container to another connected one.
+     *
+     * This allows you to pull fluid in the current fluid container to another container <em>on the same wired
+     * network</em>. Both containers must attached to wired modems which are connected via a cable.
+     *
+     * @param from      Container to move fluid from.
+     * @param computer  The current computer.
+     * @param toName    The name of the peripheral/container to push to. This is the string given to @{peripheral.wrap},
+     *                  and displayed by the wired modem.
+     * @param limit     The maximum amount of fluid to move.
+     * @param fluidName The fluid to move. If not given, an arbitrary fluid will be chosen.
+     * @return The amount of moved fluid.
+     * @throws LuaException If the peripheral to transfer to doesn't exist or isn't an fluid container.
+     * @cc.see peripheral.getName Allows you to get the name of a @{peripheral.wrap|wrapped} peripheral.
+     */
     @LuaFunction( mainThread = true )
     public static int pushFluid(
         IFluidHandler from, IComputerAccess computer,
@@ -84,6 +113,22 @@ public class FluidMethods implements GenericSource
             : moveFluid( from, new FluidStack( fluid, actualLimit ), to );
     }
 
+    /**
+     * Move a fluid from a connected fluid container into this oneone.
+     *
+     * This allows you to pull fluid in the current fluid container from another container <em>on the same wired
+     * network</em>. Both containers must attached to wired modems which are connected via a cable.
+     *
+     * @param to        Container to move fluid to.
+     * @param computer  The current computer.
+     * @param fromName  The name of the peripheral/container to push to. This is the string given to @{peripheral.wrap},
+     *                  and displayed by the wired modem.
+     * @param limit     The maximum amount of fluid to move.
+     * @param fluidName The fluid to move. If not given, an arbitrary fluid will be chosen.
+     * @return The amount of moved fluid.
+     * @throws LuaException If the peripheral to transfer to doesn't exist or isn't an fluid container.
+     * @cc.see peripheral.getName Allows you to get the name of a @{peripheral.wrap|wrapped} peripheral.
+     */
     @LuaFunction( mainThread = true )
     public static int pullFluid(
         IFluidHandler to, IComputerAccess computer,

src/main/java/dan200/computercraft/shared/peripheral/generic/methods/InventoryMethods.java

@@ -65,8 +65,8 @@ public class InventoryMethods implements GenericSource
      * {@link dan200.computercraft.shared.turtle.apis.TurtleAPI#getItemDetail} includes. More information can be fetched
      * with {@link #getItemDetail}.
      *
-     * The table is sparse, and so empty slots will be `nil` - it is recommended to loop over using `pairs` rather than
+     * The returned table is sparse, and so empty slots will be `nil` - it is recommended to loop over using `pairs`
-     * `ipairs`.
+     * rather than `ipairs`.
      *
      * @param inventory The current inventory.
      * @return All items in this inventory.

src/main/java/dan200/computercraft/shared/turtle/apis/TurtleAPI.java

@@ -371,18 +371,36 @@ public class TurtleAPI implements ILuaAPI
         return trackCommand( new TurtleDetectCommand( InteractDirection.DOWN ) );
     }
 
+    /**
+     * Check if the block in front of the turtle is equal to the item in the currently selected slot.
+     *
+     * @return If the block and item are equal.
+     * @cc.treturn boolean If the block and item are equal.
+     */
     @LuaFunction
     public final MethodResult compare()
     {
         return trackCommand( new TurtleCompareCommand( InteractDirection.FORWARD ) );
     }
 
+    /**
+     * Check if the block above the turtle is equal to the item in the currently selected slot.
+     *
+     * @return If the block and item are equal.
+     * @cc.treturn boolean If the block and item are equal.
+     */
     @LuaFunction
     public final MethodResult compareUp()
     {
         return trackCommand( new TurtleCompareCommand( InteractDirection.UP ) );
     }
 
+    /**
+     * Check if the block below the turtle is equal to the item in the currently selected slot.
+     *
+     * @return If the block and item are equal.
+     * @cc.treturn boolean If the block and item are equal.
+     */
     @LuaFunction
     public final MethodResult compareDown()
     {
@@ -478,12 +496,57 @@ public class TurtleAPI implements ILuaAPI
         return trackCommand( new TurtleSuckCommand( InteractDirection.DOWN, checkCount( count ) ) );
     }
 
+    /**
+     * Get the maximum amount of fuel this turtle currently holds.
+     *
+     * @return The fuel level, or "unlimited".
+     * @cc.treturn [1] number The current amount of fuel a turtle this turtle has.
+     * @cc.treturn [2] "unlimited" If turtles do not consume fuel when moving.
+     * @see #getFuelLimit()
+     * @see #refuel(Optional)
+     */
     @LuaFunction
     public final Object getFuelLevel()
     {
         return turtle.isFuelNeeded() ? turtle.getFuelLevel() : "unlimited";
     }
 
+    /**
+     * Refuel this turtle.
+     *
+     * While most actions a turtle can perform (such as digging or placing blocks), moving consumes fuel from the
+     * turtle's internal buffer. If a turtle has no fuel, it will not move.
+     *
+     * {@link #refuel} refuels the turtle, consuming fuel items (such as coal or lava buckets) from the currently
+     * selected slot and converting them into energy. This finishes once the turtle is fully refuelled or all items have
+     * been consumed.
+     *
+     * @param countA The maximum number of items to consume. One can pass `0` to check if an item is combustable or not.
+     * @return If this turtle could be refuelled.
+     * @throws LuaException If the refuel count is out of range.
+     * @cc.treturn [1] true If the turtle was refuelled.
+     * @cc.treturn [2] false If the turtle was not refuelled.
+     * @cc.treturn [2] string The reason the turtle was not refuelled (
+     * @cc.usage Refuel a turtle from the currently selected slot.
+     * <pre>{@code
+     * local level = turtle.getFuelLevel()
+     * if new_level == "unlimited" then error("Turtle does not need fuel", 0) end
+     *
+     * local ok, err = turtle.refuel()
+     * if ok then
+     *   local new_level = turtle.getFuelLevel()
+     *   print(("Refuelled %d, current level is %d"):format(new_level - level, new_level))
+     * else
+     *   printError(err)
+     * end}</pre>
+     * @cc.usage Check if the current item is a valid fuel source.
+     * <pre>{@code
+     * local is_fuel, reason = turtle.refuel(0)
+     * if not is_fuel then printError(reason) end
+     * }</pre>
+     * @see #getFuelLevel()
+     * @see #getFuelLimit()
+     */
     @LuaFunction
     public final MethodResult refuel( Optional<Integer> countA ) throws LuaException
     {
@@ -492,12 +555,30 @@ public class TurtleAPI implements ILuaAPI
         return trackCommand( new TurtleRefuelCommand( count ) );
     }
 
+    /**
+     * Compare the item in the currently selected slot to the item in another slot.
+     *
+     * @param slot The slot to compare to.
+     * @return If the items are the same.
+     * @throws LuaException If the slot is out of range.
+     * @cc.treturn boolean If the two items are equal.
+     */
     @LuaFunction
     public final MethodResult compareTo( int slot ) throws LuaException
     {
         return trackCommand( new TurtleCompareToCommand( checkSlot( slot ) ) );
     }
 
+    /**
+     * Move an item from the selected slot to another one.
+     *
+     * @param slotArg  The slot to move this item to.
+     * @param countArg The maximum number of items to move.
+     * @return If the item was moved or not.
+     * @throws LuaException If the slot is out of range.
+     * @throws LuaException If the number of items is out of range.
+     * @cc.treturn boolean If some items were successfully moved.
+     */
     @LuaFunction
     public final MethodResult transferTo( int slotArg, Optional<Integer> countArg ) throws LuaException
     {
@@ -518,18 +599,55 @@ public class TurtleAPI implements ILuaAPI
         return turtle.getSelectedSlot() + 1;
     }
 
+    /**
+     * Get the maximum amount of fuel this turtle can hold.
+     *
+     * By default, normal turtles have a limit of 20,000 and advanced turtles of 100,000.
+     *
+     * @return The limit, or "unlimited".
+     * @cc.treturn [1] number The maximum amount of fuel a turtle can hold.
+     * @cc.treturn [2] "unlimited" If turtles do not consume fuel when moving.
+     * @see #getFuelLevel()
+     * @see #refuel(Optional)
+     */
     @LuaFunction
     public final Object getFuelLimit()
     {
         return turtle.isFuelNeeded() ? turtle.getFuelLimit() : "unlimited";
     }
 
+    /**
+     * Equip (or unequip) an item on the left side of this turtle.
+     *
+     * This finds the item in the currently selected slot and attempts to equip it to the left side of the turtle. The
+     * previous upgrade is removed and placed into the turtle's inventory. If there is no item in the slot, the previous
+     * upgrade is removed, but no new one is equipped.
+     *
+     * @return Whether an item was equiped or not.
+     * @cc.treturn [1] true If the item was equipped.
+     * @cc.treturn [2] false If we could not equip the item.
+     * @cc.treturn [2] string The reason equipping this item failed.
+     * @see #equipRight()
+     */
     @LuaFunction
     public final MethodResult equipLeft()
     {
         return trackCommand( new TurtleEquipCommand( TurtleSide.LEFT ) );
     }
 
+    /**
+     * Equip (or unequip) an item on the right side of this turtle.
+     *
+     * This finds the item in the currently selected slot and attempts to equip it to the right side of the turtle. The
+     * previous upgrade is removed and placed into the turtle's inventory. If there is no item in the slot, the previous
+     * upgrade is removed, but no new one is equipped.
+     *
+     * @return Whether an item was equiped or not.
+     * @cc.treturn [1] true If the item was equipped.
+     * @cc.treturn [2] false If we could not equip the item.
+     * @cc.treturn [2] string The reason equipping this item failed.
+     * @see #equipRight()
+     */
     @LuaFunction
     public final MethodResult equipRight()
     {

src/main/resources/data/computercraft/lua/rom/apis/io.lua

@@ -137,6 +137,15 @@ handleMetatable = {
             return handle.seek(whence, offset)
         end,
 
+        --[[- Sets the buffering mode for an output file.
+
+        This has no effect under ComputerCraft, and exists with compatility
+        with base Lua.
+        @tparam string mode The buffering mode.
+        @tparam[opt] number size The size of the buffer.
+        @see file:setvbuf Lua's documentation for `setvbuf`.
+        @deprecated This has no effect in CC.
+        ]]
         setvbuf = function(self, mode, size) end,
 
         --- Write one or more values to the file

src/main/resources/data/computercraft/lua/rom/apis/paintutils.lua

@@ -132,7 +132,17 @@ function drawLine(startX, startY, endX, endY, colour)
         return
     end
 
-    local minX, maxX, minY, maxY = sortCoords(startX, startY, endX, endY)
+    local minX = math.min(startX, endX)
+    local maxX, minY, maxY
+    if minX == startX then
+        minY = startY
+        maxX = endX
+        maxY = endY
+    else
+        minY = endY
+        maxX = startX
+        maxY = startY
+    end
 
     -- TODO: clip to screen rectangle?
 

src/main/resources/data/computercraft/lua/rom/apis/peripheral.lua

@@ -161,7 +161,9 @@ end
 -- @tparam string name The name of the peripheral to wrap.
 -- @treturn table|nil The table containing the peripheral's methods, or `nil` if
 -- there is no peripheral present with the given name.
--- @usage peripheral.wrap("top").open(1)
+-- @usage Open the modem on the top of this computer.
+--
+--     peripheral.wrap("top").open(1)
 function wrap(name)
     expect(1, name, "string")
 
@@ -183,16 +185,25 @@ function wrap(name)
     return result
 end
 
---- Find all peripherals of a specific type, and return the
+--[[- Find all peripherals of a specific type, and return the
--- @{peripheral.wrap|wrapped} peripherals.
+@{peripheral.wrap|wrapped} peripherals.
---
+
--- @tparam string ty The type of peripheral to look for.
+@tparam string ty The type of peripheral to look for.
--- @tparam[opt] function(name:string, wrapped:table):boolean filter A
+@tparam[opt] function(name:string, wrapped:table):boolean filter A
--- filter function, which takes the peripheral's name and wrapped table
+filter function, which takes the peripheral's name and wrapped table
--- and returns if it should be included in the result.
+and returns if it should be included in the result.
--- @treturn table... 0 or more wrapped peripherals matching the given filters.
+@treturn table... 0 or more wrapped peripherals matching the given filters.
--- @usage { peripheral.find("monitor") }
+@usage Find all monitors and store them in a table, writing "Hello" on each one.
--- @usage peripheral.find("modem", rednet.open)
+
+    local monitors = { peripheral.find("monitor") }
+    for _, monitor in pairs(monitors) do
+      monitor.write("Hello")
+    end
+
+@usage This abuses the `filter` argument to call @{rednet.open} on every modem.
+
+    peripheral.find("modem", rednet.open)
+]]
 function find(ty, filter)
     expect(1, ty, "string")
     expect(2, filter, "function", "nil")

src/main/resources/data/computercraft/lua/rom/apis/turtle/turtle.lua

@@ -10,6 +10,7 @@ end
 --
 -- Generally you should not need to use this table - it only exists for
 -- backwards compatibility reasons.
+-- @deprecated
 native = turtle.native or turtle
 
 local function addCraftMethod(object)

src/main/resources/data/computercraft/lua/rom/modules/main/cc/pretty.lua

@@ -1,23 +1,28 @@
---- Provides a "pretty printer", for rendering data structures in an
+--[[- Provides a "pretty printer", for rendering data structures in an
--- aesthetically pleasing manner.
+aesthetically pleasing manner.
---
+
--- In order to display something using @{cc.pretty}, you build up a series of
+In order to display something using @{cc.pretty}, you build up a series of
--- @{Doc|documents}. These behave a little bit like strings; you can concatenate
+@{Doc|documents}. These behave a little bit like strings; you can concatenate
--- them together and then print them to the screen.
+them together and then print them to the screen.
---
+
--- However, documents also allow you to control how they should be printed. There
+However, documents also allow you to control how they should be printed. There
--- are several functions (such as @{nest} and @{group}) which allow you to control
+are several functions (such as @{nest} and @{group}) which allow you to control
--- the "layout" of the document. When you come to display the document, the 'best'
+the "layout" of the document. When you come to display the document, the 'best'
--- (most compact) layout is used.
+(most compact) layout is used.
---
+
--- @module cc.pretty
+The structure of this module is based on [A Prettier Printer][prettier].
--- @usage Print a table to the terminal
+
---     local pretty = require "cc.pretty"
+[prettier]: https://homepages.inf.ed.ac.uk/wadler/papers/prettier/prettier.pdf "A Prettier Printer"
---     pretty.print(pretty.pretty({ 1, 2, 3 }))
+
---
+@module cc.pretty
--- @usage Build a custom document and display it
+@usage Print a table to the terminal
---     local pretty = require "cc.pretty"
+    local pretty = require "cc.pretty"
---     pretty.print(pretty.group(pretty.text("hello") .. pretty.space_line .. pretty.text("world")))
+    pretty.print(pretty.pretty({ 1, 2, 3 }))
+
+@usage Build a custom document and display it
+    local pretty = require "cc.pretty"
+    pretty.print(pretty.group(pretty.text("hello") .. pretty.space_line .. pretty.text("world")))
+]]
 
 local expect = require "cc.expect"
 local expect, field = expect.expect, expect.field

src/main/resources/data/computercraft/lua/rom/programs/edit.lua

@@ -801,6 +801,7 @@ while bRunning do
                 end
             else
                 bMenu = false
+                term.setCursorBlink(true)
                 redrawMenu()
             end
         end

src/test/java/dan200/computercraft/core/terminal/TextBufferTest.java

@@ -0,0 +1,150 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2021. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+package dan200.computercraft.core.terminal;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class TextBufferTest
+{
+    @Test
+    void testStringConstructor()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        assertEquals( "test", textBuffer.toString() );
+    }
+
+    @Test
+    void testCharRepetitionConstructor()
+    {
+        TextBuffer textBuffer = new TextBuffer( 'a', 5 );
+        assertEquals( "aaaaa", textBuffer.toString() );
+    }
+
+    @Test
+    void testLength()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        assertEquals( 4, textBuffer.length() );
+    }
+
+    @Test
+    void testWrite()
+    {
+        TextBuffer textBuffer = new TextBuffer( ' ', 4 );
+        textBuffer.write( "test" );
+        assertEquals( "test", textBuffer.toString() );
+    }
+
+    @Test
+    void testWriteTextBuffer()
+    {
+        TextBuffer source = new TextBuffer( "test" );
+        TextBuffer target = new TextBuffer( "    " );
+        target.write( source );
+        assertEquals( "test", target.toString() );
+    }
+
+    @Test
+    void testWriteFromPos()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        textBuffer.write( "il", 1 );
+        assertEquals( "tilt", textBuffer.toString() );
+    }
+
+    @Test
+    void testWriteOutOfBounds()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        textBuffer.write( "abcdefghijklmnop", -5 );
+        assertEquals( "fghi", textBuffer.toString() );
+    }
+
+    @Test
+    void testWriteOutOfBounds2()
+    {
+        TextBuffer textBuffer = new TextBuffer( "             " );
+        textBuffer.write( "Hello, world!", -3 );
+        assertEquals( "lo, world!   ", textBuffer.toString() );
+    }
+
+    @Test
+    void testFill()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        textBuffer.fill( 'c' );
+        assertEquals( "cccc", textBuffer.toString() );
+    }
+
+    @Test
+    void testFillSubstring()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        textBuffer.fill( 'c', 1, 3 );
+        assertEquals( "tcct", textBuffer.toString() );
+    }
+
+    @Test
+    void testFillOutOfBounds()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        textBuffer.fill( 'c', -5, 5 );
+        assertEquals( "cccc", textBuffer.toString() );
+    }
+
+    @Test
+    void testCharAt()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        assertEquals( 'e', textBuffer.charAt( 1 ) );
+    }
+
+    @Test
+    void testSetChar()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        textBuffer.setChar( 2, 'n' );
+        assertEquals( "tent", textBuffer.toString() );
+    }
+
+    @Test
+    void testSetCharWithNegativeIndex()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        textBuffer.setChar( -5, 'n' );
+        assertEquals( "test", textBuffer.toString(), "Buffer should not change after setting char with negative index." );
+    }
+
+    @Test
+    void testSetCharWithIndexBeyondBufferEnd()
+    {
+        TextBuffer textBuffer = new TextBuffer( "test" );
+        textBuffer.setChar( 10, 'n' );
+        assertEquals( "test", textBuffer.toString(), "Buffer should not change after setting char beyond buffer end." );
+    }
+
+    @Test
+    void testMultipleOperations()
+    {
+        TextBuffer textBuffer = new TextBuffer( ' ', 5 );
+        textBuffer.setChar( 0, 'H' );
+        textBuffer.setChar( 1, 'e' );
+        textBuffer.setChar( 2, 'l' );
+        textBuffer.write( "lo", 3 );
+        assertEquals( "Hello", textBuffer.toString(), "TextBuffer failed to persist over multiple operations." );
+    }
+
+    @Test
+    void testEmptyBuffer()
+    {
+        TextBuffer textBuffer = new TextBuffer( "" );
+        // exception on writing to empty buffer would fail the test
+        textBuffer.write( "test" );
+        assertEquals( "", textBuffer.toString() );
+    }
+}

src/test/resources/test-rom/spec/apis/paintutils_spec.lua

@@ -67,6 +67,19 @@ describe("The paintutils library", function()
                 { "   ", "000", "ffe" },
             })
         end)
+
+        it("draws a line going diagonally from bottom left", function()
+            local w = with_window(3, 3, function()
+                term.setBackgroundColour(colours.red)
+                paintutils.drawLine(1, 3, 3, 1)
+            end)
+
+            window_eq(w, {
+                { "   ", "000", "ffe" },
+                { "   ", "000", "fef" },
+                { "   ", "000", "eff" },
+            })
+        end)
     end)
 
     describe("paintutils.drawBox", function()