baserom now derived from bmbp file.

Patch.py

@@ -57,16 +57,19 @@ def create_patch_file(rom_file_to_patch: str, server: str = "") -> str:
     write_lzma(bytes, target)
     return target
 
-
-def create_rom_file(patch_file: str) -> Tuple[dict, str]:
+def create_rom_bytes(patch_file: str) -> Tuple[dict, str, bytearray]:
     data = Utils.parse_yaml(lzma.decompress(load_bytes(patch_file)).decode("utf-8-sig"))
     patched_data = bsdiff4.patch(get_base_rom_bytes(), data["patch"])
     rom_hash = patched_data[int(0x7FC0):int(0x7FD5)]
     data["meta"]["hash"] = "".join(chr(x) for x in rom_hash)
     target = os.path.splitext(patch_file)[0] + ".sfc"
+    return data["meta"], target, patched_data
+
+def create_rom_file(patch_file: str) -> Tuple[dict, str]:
+    data, target, patched_data = create_rom_bytes(patch_file)
     with open(target, "wb") as f:
         f.write(patched_data)
-    return data["meta"], target
+    return data, target
 
 
 def update_patch_data(patch_data: bytes, server: str = "") -> bytes:

Rom.py

@@ -102,6 +102,30 @@ class LocalRom(object):
         return ret
 
     def patch_base_rom(self):
+        from Patch import create_patch_file, create_rom_bytes
+
+        if os.path.isfile(local_path('data/baserom.sfc')):
+            with open(local_path('data/baserom.sfc'), 'rb') as stream:
+                buffer = bytearray(stream.read())
+
+            buffermd5 = hashlib.md5()
+            buffermd5.update(buffer)
+            if RANDOMIZERBASEHASH == buffermd5.hexdigest():
+                self.buffer = buffer
+                if not os.path.exists(local_path('data/baserom.bmbp')):
+                    create_patch_file(local_path('data/baserom.sfc'))
+                return
+
+        if os.path.isfile(local_path('data/baserom.bmbp')):
+            _, target, buffer = create_rom_bytes(local_path('data/baserom.bmbp'))
+            buffermd5 = hashlib.md5()
+            buffermd5.update(buffer)
+            if RANDOMIZERBASEHASH == buffermd5.hexdigest():
+                self.buffer = bytearray(buffer)
+                with open(local_path('data/baserom.sfc'), 'wb') as stream:
+                    stream.write(buffer)
+                return
+
         # verify correct checksum of baserom
         basemd5 = hashlib.md5()
         basemd5.update(self.buffer)
@@ -124,6 +148,12 @@ class LocalRom(object):
         patchedmd5.update(self.buffer)
         if patchedmd5.hexdigest() not in [RANDOMIZERBASEHASH]:
             raise RuntimeError('Provided Base Rom unsuitable for patching. Please provide a JAP(1.0) "Zelda no Densetsu - Kamigami no Triforce (Japan).sfc" rom to use as a base.')
+        else:
+            with open(local_path('data/baserom.sfc'), 'wb') as stream:
+                stream.write(self.buffer)
+            create_patch_file(local_path('data/baserom.sfc'))
+            os.remove(local_path('data/base2current.json'))
+
 
     def write_crc(self):
         crc = (sum(self.buffer[:0x7FDC] + self.buffer[0x7FE0:]) + 0x01FE) & 0xFFFF