Compress embedded GDExtension interface

core/extension/make_interface_dumper.py

@@ -1,9 +1,19 @@
+import zlib
+
+
 def run(target, source, env):
     src = source[0]
     dst = target[0]
-    f = open(src, "r", encoding="utf-8")
+    f = open(src, "rb")
     g = open(dst, "w", encoding="utf-8")
 
+    buf = f.read()
+    decomp_size = len(buf)
+
+    # Use maximum zlib compression level to further reduce file size
+    # (at the cost of initial build times).
+    buf = zlib.compress(buf, zlib.Z_BEST_COMPRESSION)
+
     g.write(
         """/* THIS FILE IS GENERATED DO NOT EDIT */
 #ifndef GDEXTENSION_INTERFACE_DUMP_H
@@ -11,25 +21,32 @@ def run(target, source, env):
 
 #ifdef TOOLS_ENABLED
 
+#include "core/io/compression.h"
 #include "core/io/file_access.h"
 #include "core/string/ustring.h"
 
-class GDExtensionInterfaceDump {
-	private:
-        static constexpr char const *gdextension_interface_dump ="""
+"""
     )
-    for line in f:
-        g.write('"' + line.rstrip().replace('"', '\\"') + '\\n"\n')
-    g.write(";\n")
+
+    g.write("static const int _gdextension_interface_data_compressed_size = " + str(len(buf)) + ";\n")
+    g.write("static const int _gdextension_interface_data_uncompressed_size = " + str(decomp_size) + ";\n")
+    g.write("static const unsigned char _gdextension_interface_data_compressed[] = {\n")
+    for i in range(len(buf)):
+        g.write("\t" + str(buf[i]) + ",\n")
+    g.write("};\n")
 
     g.write(
         """
+class GDExtensionInterfaceDump {
     public:
         static void generate_gdextension_interface_file(const String &p_path) {
             Ref<FileAccess> fa = FileAccess::open(p_path, FileAccess::WRITE);
             ERR_FAIL_COND_MSG(fa.is_null(), vformat("Cannot open file '%s' for writing.", p_path));
-            CharString cs(gdextension_interface_dump);
-            fa->store_buffer((const uint8_t *)cs.ptr(), cs.length());
+            Vector<uint8_t> data;
+            data.resize(_gdextension_interface_data_uncompressed_size);
+            int ret = Compression::decompress(data.ptrw(), _gdextension_interface_data_uncompressed_size, _gdextension_interface_data_compressed, _gdextension_interface_data_compressed_size, Compression::MODE_DEFLATE);
+            ERR_FAIL_COND_MSG(ret == -1, "Compressed file is corrupt.");
+            fa->store_buffer(data.ptr(), data.size());
         };
 };