Only run uv smoke test on Ubuntu

Refs https://github.com/simonw/sqlite-utils/pull/843#issuecomment-5287666426

.github/workflows/test-coverage.yml

@@ -20,7 +20,7 @@ jobs:
         cache: pip
         cache-dependency-path: pyproject.toml
     - name: Install SpatiaLite
-      run: sudo apt-get update && sudo apt-get install -y libsqlite3-mod-spatialite
+      run: sudo apt-get install libsqlite3-mod-spatialite
     - name: Install Python dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/test.yml

@@ -10,18 +10,18 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15-dev"]
         numpy: [0, 1]
         os: [ubuntu-latest, macos-latest, windows-latest, macos-14]
     steps:
     - uses: actions/checkout@v7
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v7
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
+        allow-prereleases: true
         cache: pip
         cache-dependency-path: pyproject.toml
-        check-latest: true
     - name: Install dependencies
       run: |
         pip install . --group dev
@@ -30,7 +30,7 @@ jobs:
       run: pip install numpy
     - name: Install SpatiaLite
       if: matrix.os == 'ubuntu-latest'
-      run: sudo apt-get update && sudo apt-get install -y libsqlite3-mod-spatialite
+      run: sudo apt-get install libsqlite3-mod-spatialite
     - name: Build extension for --load-extension test
       if: matrix.os == 'ubuntu-latest'
       run: |-

Justfile

@@ -2,12 +2,9 @@
 @default: test lint
 
 # Run pytest with supplied options
-@test *options: test-no-dev-dependencies
+@test *options:
   uv run pytest {{options}}
 
-@test-no-dev-dependencies:
-  uv run --isolated --no-default-groups sqlite-utils --help > /dev/null
-
 @run *options:
   uv run -- {{options}}
 

docs/changelog.rst

@@ -4,13 +4,6 @@
  Changelog
 ===========
 
-.. _v4_2_1:
-
-4.2.1 (2026-08-13)
-------------------
-
-- Fix for ``No module named 'typing_extensions'`` crashing bug accidentally shipped in version 4.2. (:issue:`842`)
-
 .. _v4_2:
 
 4.2 (2026-08-13)

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "sqlite-utils"
-version = "4.2.1"
+version = "4.2"
 description = "CLI tool and Python library for manipulating SQLite databases"
 readme = { file = "README.md", content-type = "text/markdown" }
 authors = [

sqlite_utils/utils.py

@@ -380,14 +380,10 @@ def rows_from_file(
                 "rows_from_file() requires a file-like object that supports peek(), such as io.BytesIO"
             )
         if not first_bytes:
-            buffered.close()
             return (), Format.CSV
         if first_bytes.startswith((b"[", b"{")):
-            # JSON is read eagerly, so the detection wrapper can close now,
-            # including when parsing raises an error.
             # TODO: Detect newline-JSON
-            with buffered:
-                return rows_from_file(buffered, format=Format.JSON)
+            return rows_from_file(buffered, format=Format.JSON)
         else:
             dialect = csv.Sniffer().sniff(
                 first_bytes.decode(encoding or "utf-8-sig", "ignore")

tests/test_rows_from_file.py

@@ -1,5 +1,3 @@
-import io
-import json
 from io import BytesIO, StringIO
 
 import pytest
@@ -63,71 +61,3 @@ def test_rows_from_file_error_on_string_io():
     assert ex.value.args == (
         "rows_from_file() requires a file-like object that supports peek(), such as io.BytesIO",
     )
-
-
-@pytest.fixture
-def buffered_readers(monkeypatch):
-    # Keep wrappers alive so these checks cannot pass due to garbage collection.
-    readers = []
-    original = io.BufferedReader
-
-    def buffered_reader(*args, **kwargs):
-        reader = original(*args, **kwargs)
-        readers.append(reader)
-        return reader
-
-    monkeypatch.setattr(io, "BufferedReader", buffered_reader)
-    yield readers
-    for reader in readers:
-        reader.close()
-
-
-@pytest.mark.parametrize(
-    "content, expected_format, expected_rows",
-    [
-        (b'[{"id": 1}]', Format.JSON, [{"id": 1}]),
-        (b'{"id": 1}', Format.JSON, [{"id": 1}]),
-        (b"[]", Format.JSON, []),
-        (b"", Format.CSV, []),
-        (b" \n\t", Format.CSV, []),
-    ],
-)
-def test_detect_format_closes_eager_reader(
-    tmp_path, buffered_readers, content, expected_format, expected_rows
-):
-    path = tmp_path / "input"
-    path.write_bytes(content)
-    with path.open("rb") as fp:
-        rows, detected = rows_from_file(fp)
-        assert detected == expected_format
-        assert list(rows) == expected_rows
-        assert len(buffered_readers) == 1
-        assert buffered_readers[0].closed
-
-
-@pytest.mark.parametrize("content", [b"[", b'{"id":'])
-def test_detect_format_closes_reader_on_invalid_json(
-    tmp_path, buffered_readers, content
-):
-    path = tmp_path / "input.json"
-    path.write_bytes(content)
-    with path.open("rb") as fp:
-        with pytest.raises(json.JSONDecodeError):
-            rows_from_file(fp)
-        assert len(buffered_readers) == 1
-        assert buffered_readers[0].closed
-
-
-@pytest.mark.parametrize(
-    "delimiter, expected_format", [(b",", Format.CSV), (b"\t", Format.TSV)]
-)
-def test_detect_format_keeps_streaming_reader_open(
-    buffered_readers, delimiter, expected_format
-):
-    content = b"id" + delimiter + b"name\n" + (b"1" + delimiter + b"Cleo\n") * 2000
-    rows, detected = rows_from_file(BytesIO(content))
-    assert detected == expected_format
-    assert len(buffered_readers) == 1
-    assert not buffered_readers[0].closed
-    assert len(list(rows)) == 2000
-    assert buffered_readers[0].closed