Start implementing dynamic path mounts

Binaries may not have the path that the configuration files expect
them to, so we need to make validation select binaries on custom
paths.

src/smgdc/app.py

@@ -21,14 +21,24 @@ def main() -> None:
     else:
         validation_files.add(args.validation_path)
 
+    bin_mounts = {
+        "232250/tf/bin/server.dll": "server.dll",
+        "232250/tf/bin/server_srv.so": "server_srv.so",
+    }
+
+    candidate_targets: list[PlatformBinary] = []
+    for mount, bin in bin_mounts.items():
+        bin_path = pathlib.Path(bin)
+        loaded_bin: PlatformBinary
+        if bin_path.suffix == ".so":
+            loaded_bin = LinuxBinary(bin_path)
+        elif bin_path.suffix == ".dll":
+            loaded_bin = WindowsBinary(bin_path)
+        else:
+            raise ValueError(f"Unknown bin suffix {bin_path.suffix}")
+        loaded_bin.path = pathlib.Path(mount)
+        candidate_targets.append(loaded_bin)
 
-    linux_target = LinuxBinary(pathlib.Path("server_srv.so"))
-    windows_target = WindowsBinary(pathlib.Path("server.dll"))
-
-    linux_target.path = pathlib.Path("232250/tf/bin/server_srv.so")
-    windows_target.path = pathlib.Path("232250/tf/bin/server.dll")
-
-    candidate_targets: list[PlatformBinary] = [linux_target, windows_target]
     for validation_file in sorted(validation_files):
         header = validation_file.stem
         if args.validation_path.is_dir():