Json sorting

buildSrc/src/main/java/baritone/gradle/util/Determinizer.java

@@ -17,13 +17,16 @@
 
 package baritone.gradle.util;
 
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
+import com.google.gson.*;
+import com.google.gson.internal.LazilyParsedNumber;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+
+import java.io.*;
+import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Map;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 import java.util.jar.JarOutputStream;
@@ -38,14 +41,6 @@ import java.util.stream.Collectors;
 public class Determinizer {
 
     public static void main(String... args) throws IOException {
-        /*
-        haha yeah can't relate
-
-        unzip -p build/libs/baritone-$VERSION.jar "mixins.baritone.refmap.json" | jq --sort-keys -c -M '.' > mixins.baritone.refmap.json
-        zip -u build/libs/baritone-$VERSION.jar mixins.baritone.refmap.json
-        rm mixins.baritone.refmap.json
-         */
-
         System.out.println("Running Determinizer");
         System.out.println(" Input path: " + args[0]);
         System.out.println(" Output path: " + args[1]);
@@ -67,8 +62,13 @@ public class Determinizer {
             JarEntry clone = new JarEntry(entry.getName());
             clone.setTime(0);
             jos.putNextEntry(clone);
+            if (entry.getName().endsWith(".refmap.json")) {
+                JsonObject object = new JsonParser().parse(new InputStreamReader(jarFile.getInputStream(entry))).getAsJsonObject();
+                copy(writeSorted(object), jos);
+            } else {
                 copy(jarFile.getInputStream(entry), jos);
             }
+        }
 
         jos.finish();
         jos.close();
@@ -82,4 +82,100 @@ public class Determinizer {
             os.write(buffer, 0, len);
         }
     }
+
+    private static void copy(String s, OutputStream os) throws IOException {
+        os.write(s.getBytes());
+    }
+
+    private static String writeSorted(JsonObject in) throws IOException {
+        StringWriter writer = new StringWriter();
+        JsonWriter jw = new JsonWriter(writer);
+        JSON_ELEMENT.write(jw, in);
+        return writer.toString() + "\n";
+    }
+
+    /**
+     * All credits go to GSON and its contributors. GSON is licensed under the Apache 2.0 License.
+     * This implementation has been modified to write {@link JsonObject} keys in order.
+     *
+     * @see <a href="https://github.com/google/gson/blob/master/LICENSE">GSON License</a>
+     * @see <a href="https://github.com/google/gson/blob/master/gson/src/main/java/com/google/gson/internal/bind/TypeAdapters.java#L698">Original Source</a>
+     */
+    private static final TypeAdapter<JsonElement> JSON_ELEMENT = new TypeAdapter<JsonElement>() {
+
+        @Override
+        public JsonElement read(JsonReader in) throws IOException {
+            switch (in.peek()) {
+                case STRING:
+                    return new JsonPrimitive(in.nextString());
+                case NUMBER:
+                    String number = in.nextString();
+                    return new JsonPrimitive(new LazilyParsedNumber(number));
+                case BOOLEAN:
+                    return new JsonPrimitive(in.nextBoolean());
+                case NULL:
+                    in.nextNull();
+                    return JsonNull.INSTANCE;
+                case BEGIN_ARRAY:
+                    JsonArray array = new JsonArray();
+                    in.beginArray();
+                    while (in.hasNext()) {
+                        array.add(read(in));
+                    }
+                    in.endArray();
+                    return array;
+                case BEGIN_OBJECT:
+                    JsonObject object = new JsonObject();
+                    in.beginObject();
+                    while (in.hasNext()) {
+                        object.add(in.nextName(), read(in));
+                    }
+                    in.endObject();
+                    return object;
+                case END_DOCUMENT:
+                case NAME:
+                case END_OBJECT:
+                case END_ARRAY:
+                default:
+                    throw new IllegalArgumentException();
+            }
+        }
+
+        @Override
+        public void write(JsonWriter out, JsonElement value) throws IOException {
+            if (value == null || value.isJsonNull()) {
+                out.nullValue();
+            } else if (value.isJsonPrimitive()) {
+                JsonPrimitive primitive = value.getAsJsonPrimitive();
+                if (primitive.isNumber()) {
+                    out.value(primitive.getAsNumber());
+                } else if (primitive.isBoolean()) {
+                    out.value(primitive.getAsBoolean());
+                } else {
+                    out.value(primitive.getAsString());
+                }
+
+            } else if (value.isJsonArray()) {
+                out.beginArray();
+                for (JsonElement e : value.getAsJsonArray()) {
+                    write(out, e);
+                }
+                out.endArray();
+
+            } else if (value.isJsonObject()) {
+                out.beginObject();
+
+                List<Map.Entry<String, JsonElement>> entries = new ArrayList<>(value.getAsJsonObject().entrySet());
+                entries.sort(Comparator.comparing(Map.Entry::getKey));
+                for (Map.Entry<String, JsonElement> e : entries) {
+                    out.name(e.getKey());
+                    write(out, e.getValue());
+                }
+                out.endObject();
+
+            } else {
+                throw new IllegalArgumentException("Couldn't write " + value.getClass());
+            }
+        }
+    };
 }