Add a creative fluid source for guide scenes

dependencies.gradle

@@ -17,7 +17,7 @@ dependencies {
     shadowImplementation("org.eclipse.elk:org.eclipse.elk.alg.layered:0.11.0")
     shadowImplementation("org.eclipse.xtext:org.eclipse.xtext.xbase.lib:2.36.0")
 
-    devOnlyNonPublishable("com.github.GTNewHorizons:StructureLib:1.4.42:dev")
+    devOnlyNonPublishable("com.github.GTNewHorizons:StructureLib:1.4.44:dev")
     devOnlyNonPublishable("com.github.GTNewHorizons:GT5-Unofficial:5.09.54.36:dev")
     devOnlyNonPublishable("com.github.GTNewHorizons:NotEnoughItems:2.8.128-GTNH:dev")
     devOnlyNonPublishable("com.github.GTNewHorizons:Applied-Energistics-2-Unofficial:rv3-beta-1045-GTNH:dev")
@@ -61,7 +61,7 @@ dependencies {
     annotationProcessor("com.google.auto.value:auto-value:1.10.4")
 
     testImplementation("org.junit.jupiter:junit-jupiter-api:5.12.2")
-    testImplementation("com.github.GTNewHorizons:StructureLib:1.4.42:dev")
+    testImplementation("com.github.GTNewHorizons:StructureLib:1.4.44:dev")
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.12.2")
     testRuntimeOnly("org.junit.platform:junit-platform-launcher:1.12.2")
 }

src/main/java/com/hfstudio/guidenh/integration/structurelib/CreativeFluidSource.java

@@ -0,0 +1,26 @@
+package com.hfstudio.guidenh.integration.structurelib;
+
+import net.minecraftforge.fluids.FluidStack;
+
+import javax.annotation.Nonnull;
+
+import com.gtnewhorizon.structurelib.fluid.IFluidSource;
+
+/**
+ * A fluid source that always holds as much of the requested fluid as asked for.
+ * <p>
+ * Guide book scenes are built with a creative item source, and this is its fluid counterpart: it lets a scene fill the
+ * positions a multiblock wants a fluid at, e.g. the water an ore washing plant needs, without anybody having to carry
+ * that fluid.
+ */
+public class CreativeFluidSource implements IFluidSource {
+
+    public static final CreativeFluidSource instance = new CreativeFluidSource();
+
+    @Nonnull
+    @Override
+    public FluidStack take(FluidStack resource, boolean simulate) {
+        if (resource == null || resource.getFluid() == null) throw new IllegalArgumentException();
+        return new FluidStack(resource, resource.amount);
+    }
+}

src/main/java/com/hfstudio/guidenh/integration/structurelib/StructureLibBuildService.java

@@ -171,7 +171,8 @@ private static void buildStructure(IConstructable constructable, ItemStack trigg
         boolean useSurvival = constructable instanceof ISurvivalConstructable;
         if (useSurvival) {
             ISurvivalConstructable sc = (ISurvivalConstructable) constructable;
-            ISurvivalBuildEnvironment env = ISurvivalBuildEnvironment.create(createItemSource(), fakePlayer);
+            ISurvivalBuildEnvironment env = ISurvivalBuildEnvironment
+                .create(createItemSource(), CreativeFluidSource.instance, fakePlayer);
             int rounds = 0;
             while (rounds++ < SURVIVAL_MAX_ROUNDS) {
                 int result = sc.survivalConstruct(trigger, SURVIVAL_BUDGET, env);