Add initial AccessWidener

2026-06-11 12:22:44 +02:00
parent e176b3bca8
commit 786257ad0e
15 changed files with 979 additions and 6 deletions
@@ -0,0 +1,104 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2026 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Parses Fabric-compatible .accesswidener files.
+ * <p>
+ * Supported format:
+ * <pre>
+ *   accessWidener v2 named
+ *
+ *   # comments are supported
+ *   accessible class  net/minecraft/Foo
+ *   accessible method net/minecraft/Foo someMethod ()V
+ *   accessible field  net/minecraft/Foo someField I
+ *   mutable    field  net/minecraft/Foo someField I
+ *   extendable class  net/minecraft/Foo
+ *   extendable method net/minecraft/Foo someMethod ()V
+ *
+ *   # transitive variants (expose widening to dependents)
+ *   transitive-accessible class net/minecraft/Foo
+ * </pre>
+ */
+public final class AccessWidenerParser {
+
+    private AccessWidenerParser() {
+    }
+
+    public static List<AccessWidenerEntry> parse(InputStream in) throws IOException {
+        List<AccessWidenerEntry> entries = new ArrayList<>();
+
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, StandardCharsets.UTF_8))) {
+
+            String line;
+            boolean headerSeen = false;
+
+            while ((line = reader.readLine()) != null) {
+                // Strip inline comments
+                int commentIdx = line.indexOf('#');
+                if (commentIdx >= 0) line = line.substring(0, commentIdx);
+                line = line.strip();
+
+                if (line.isEmpty()) continue;
+
+                if (!headerSeen) {
+                    // First non-blank, non-comment line must be the header
+                    if (!line.startsWith("accessWidener")) {
+                        throw new IOException("Missing accessWidener header, got: " + line);
+                    }
+                    headerSeen = true;
+                    continue;
+                }
+
+                AccessWidenerEntry entry = parseLine(line);
+                if (entry != null) entries.add(entry);
+            }
+        }
+
+        return entries;
+    }
+
+    private static AccessWidenerEntry parseLine(String line) {
+        String[] parts = line.split("\\s+");
+        if (parts.length < 3) return null;
+
+        String directive = parts[0]; // accessible / mutable / extendable / transitive-*
+        String memberType = parts[1]; // class / method / field
+        String target = parts[2]; // internal class name
+
+        return switch (memberType) {
+            case "class" -> new AccessWidenerEntry(directive, "class", target, null, null);
+            case "method", "field" -> {
+                if (parts.length < 5) yield null;
+                yield new AccessWidenerEntry(directive, memberType, target, parts[3], parts[4]);
+            }
+            default -> null;
+        };
+    }
+}