Initial

.gitignore

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+bin/
+obj/
+/packages/
+riderModule.iml
+/_ReSharper.Caches/
+work
+.idea

.gitmodules

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+[submodule "Reactor.Greenhouse/Mappings"]
+	path = Reactor.Greenhouse/Mappings
+	url = https://github.com/NuclearPowered/Mappings

LICENSE

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+                   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.
+
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+
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README.md

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+## Reactor.Greenhouse
+
+Standalone program which generates mappings for OxygenFilter
+
+## Reactor.OxygenFilter
+
+Library for mapping stuff
+
+## Reactor.OxygenFilter.MSBuild
+
+Library for using mappings in a project

Reactor.Greenhouse/Compiler.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.RegularExpressions;
+using Mono.Cecil;
+using Reactor.OxygenFilter;
+
+namespace Reactor.Greenhouse
+{
+    public static class Compiler
+    {
+        public static void Apply(this Mappings current, Mappings mappings)
+        {
+            static void ApplyType(List<MappedType> types, MappedType newType)
+            {
+                var type = types.SingleOrDefault(x => newType.Equals(x));
+                if (type == null)
+                {
+                    types.Add(newType);
+                }
+                else
+                {
+                    type.Mapped = newType.Mapped;
+
+                    void ApplyMembers(List<MappedMember> members, List<MappedMember> newMembers)
+                    {
+                        foreach (var newMember in newMembers)
+                        {
+                            var member = members.SingleOrDefault(x => newMember.Equals(x, false));
+
+                            if (member == null)
+                            {
+                                members.Add(newMember);
+                            }
+                            else
+                            {
+                                member.Mapped = newMember.Mapped;
+                                member.Original = newMember.Original;
+                            }
+                        }
+                    }
+
+                    ApplyMembers(type.Fields, newType.Fields);
+                    ApplyMembers(type.Properties, newType.Properties);
+
+                    foreach (var newMember in newType.Methods)
+                    {
+                        var member = type.Methods.SingleOrDefault(x => newMember.Equals(x, false));
+
+                        if (member == null)
+                        {
+                            type.Methods.Add(newMember);
+                        }
+                        else
+                        {
+                            member.Mapped = newMember.Mapped;
+                            member.Original = newMember.Original;
+                            member.Parameters = newMember.Parameters;
+                        }
+                    }
+
+                    foreach (var nestedType in newType.Nested)
+                    {
+                        ApplyType(type.Nested, nestedType);
+                    }
+                }
+            }
+
+            foreach (var newType in mappings.Types)
+            {
+                ApplyType(current.Types, newType);
+            }
+        }
+
+        private static Regex Regex { get; } = new Regex(@"{{(?<expression>[\w\.]+)}}", RegexOptions.Compiled);
+
+        public static string MapSignature(this OriginalDescriptor original, Mappings mappings)
+        {
+            var signature = original.Signature;
+
+            var matches = Regex.Matches(signature);
+            foreach (Match match in matches)
+            {
+                var group = match.Groups["expression"];
+                if (group.Success)
+                {
+                    signature = signature.Replace(match.Value, mappings.FindByMapped(group.Value).Original.Name);
+                }
+            }
+
+            return signature;
+        }
+
+        private static bool TestField(MappedMember field, TypeDefinition typeDef, FieldDefinition fieldDef, Mappings mappings)
+        {
+            return (field.Original.Name == null || field.Original.Name == fieldDef.Name) &&
+                   (field.Original.Index == null || field.Original.Index == typeDef.Fields.IndexOf(fieldDef)) &&
+                   (field.Original.Signature == null || field.Original.MapSignature(mappings) == fieldDef.GetSignature()) &&
+                   (field.Original.Const == null || !typeDef.IsEnum && field.Original.Const.Value.Equals(fieldDef.Constant));
+        }
+
+        private static bool TestMethod(MappedMember method, TypeDefinition typeDef, MethodDefinition methodDef, Mappings mappings)
+        {
+            return (method.Original.Index == null || method.Original.Index == typeDef.Methods.IndexOf(methodDef)) &&
+                   (method.Original.Signature == null || method.Original.MapSignature(mappings) == methodDef.GetSignature()) &&
+                   (method.Original.Name == null || method.Original.Name == methodDef.Name);
+        }
+
+        private static bool TestProperty(MappedMember property, TypeDefinition typeDef, PropertyDefinition propertyDef, Mappings mappings)
+        {
+            return (property.Original.Name == null || property.Original.Name == propertyDef.Name) &&
+                   (property.Original.Index == null || property.Original.Index == typeDef.Properties.IndexOf(propertyDef)) &&
+                   (property.Original.Signature == null || property.Original.MapSignature(mappings) == propertyDef.GetSignature());
+        }
+
+        private static bool TestType(MappedType type, TypeDefinition typeDef, Mappings mappings)
+        {
+            return (type.Original.Name == null || type.Original.Name == typeDef.Name) &&
+                   type.Methods.All(method => typeDef.Methods.Any(m => TestMethod(method, typeDef, m, mappings))) &&
+                   type.Fields.All(field => typeDef.Fields.Any(f => TestField(field, typeDef, f, mappings))) &&
+                   type.Properties.All(property => typeDef.Properties.Any(p => TestProperty(property, typeDef, p, mappings)));
+        }
+
+        private static void Compile(this MappedType type, TypeDefinition typeDef, Mappings mappings)
+        {
+            type.Original = new OriginalDescriptor { Name = typeDef.Name };
+
+            foreach (var nested in type.Nested)
+            {
+                var nestedDef = typeDef.NestedTypes.Single(t =>
+                    TestType(type, t, mappings) &&
+                    nested.Original.Index == null || typeDef.NestedTypes.IndexOf(t) == nested.Original.Index
+                );
+
+                nested.Compile(nestedDef, mappings);
+            }
+
+            foreach (var property in type.Properties)
+            {
+                try
+                {
+                    var propertyDef = typeDef.Properties.Single(p => TestProperty(property, typeDef, p, mappings));
+
+                    property.Original = new OriginalDescriptor { Name = propertyDef.Name };
+                }
+                catch (Exception e)
+                {
+                    throw new Exception($"Compilation of {property} failed", e);
+                }
+            }
+
+            foreach (var field in type.Fields)
+            {
+                try
+                {
+                    var fieldDef = typeDef.Fields.Single(f => TestField(field, typeDef, f, mappings));
+
+                    field.Original = new OriginalDescriptor { Name = fieldDef.Name };
+                }
+                catch (Exception e)
+                {
+                    throw new Exception($"Compilation of {field} failed", e);
+                }
+            }
+
+            foreach (var method in type.Methods)
+            {
+                try
+                {
+                    var methodDef = typeDef.Methods.Single(m => TestMethod(method, typeDef, m, mappings));
+
+                    method.Original = new OriginalDescriptor { Name = methodDef.Name, Signature = methodDef.GetSignature() };
+                }
+                catch (Exception e)
+                {
+                    throw new Exception($"Compilation of {method} failed", e);
+                }
+            }
+        }
+
+        public static void Compile(this Mappings mappings, ModuleDefinition moduleDef)
+        {
+            foreach (var type in mappings.Types)
+            {
+                try
+                {
+                    var typeDef = moduleDef.Types.Single(t => TestType(type, t, mappings));
+
+                    type.Compile(typeDef, mappings);
+                }
+                catch (Exception e)
+                {
+                    throw new Exception($"Compilation of {type} failed", e);
+                }
+            }
+        }
+    }
+}