feat: thread SVN auth (username/password) through all svn call sites

svn_mirror/config.py

@@ -28,6 +28,14 @@ class SVNConfig:
     trunk: str = "trunk"
     branches: str = "branches"
     tags: str = "tags"
+    username: Optional[str] = None
+    password: Optional[str] = None
+
+    def auth_args(self) -> list:
+        """Return ``['--username', u, '--password', p]`` if configured, else []."""
+        if self.username:
+            return ["--username", self.username, "--password", self.password or ""]
+        return []
 
     @classmethod
     def from_dict(cls, d: dict, prefix: str) -> "SVNConfig":
@@ -47,7 +55,13 @@ class SVNConfig:
         for name, val in [("trunk", trunk), ("branches", branches), ("tags", tags)]:
             _check_type(val, str, f"{prefix}.{name}")
 
-        return cls(url=url, layout=layout, trunk=trunk, branches=branches, tags=tags)
+        username = d.get("username")
+        _check_optional(username, str, f"{prefix}.username")
+        password = d.get("password")
+        _check_optional(password, str, f"{prefix}.password")
+
+        return cls(url=url, layout=layout, trunk=trunk, branches=branches,
+                   tags=tags, username=username, password=password)
 
 
 @dataclass