chore: Remove obspec dependency; vendor GetRangeAsync

pyproject.toml

@@ -20,7 +20,7 @@ classifiers = [
     "Topic :: Scientific/Engineering :: GIS",
 ]
 requires-python = ">=3.11"
-dependencies = ["obspec>=0.1.0", "pmtiles>=3.4.1"]
+dependencies = ["pmtiles>=3.4.1"]
 
 [project.urls]
 Source = "https://github.com/developmentseed/async-pmtiles"

src/async_pmtiles/_reader.py

@@ -5,7 +5,7 @@
 import gzip
 import json
 from dataclasses import dataclass
-from typing import TYPE_CHECKING, Self
+from typing import TYPE_CHECKING, Protocol, Self
 
 from pmtiles.tile import (
     Compression,
@@ -19,7 +19,6 @@
 if TYPE_CHECKING:
     import sys
 
-    from obspec import GetRangeAsync
     from pmtiles.tile import HeaderDict
 
     if sys.version_info >= (3, 12):
@@ -28,6 +27,22 @@
         from typing_extensions import Buffer
 
 
+class GetRangeAsync(Protocol):
+    async def get_range_async(
+        self,
+        path: str,
+        *,
+        start: int,
+        end: int | None = None,
+        length: int | None = None,
+    ) -> Buffer:
+        """Call `get_range` asynchronously.
+
+        Refer to the documentation for [GetRange][obspec.GetRange].
+        """
+        ...
+
+
 @dataclass()
 class PMTilesReader:
     """PMTiles Reader."""