Fix closing contexts of tar and zip files and add test 3.14t in CI (#2012)

Author: ariostas

.github/workflows/main.yaml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   linux:
-    name: ${{ matrix.PY }}-pytest
+    name: ${{ matrix.PY }}${{ matrix.FREETHREADING && 't' || '' }}-pytest
     runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
@@ -19,6 +19,11 @@ jobs:
           - "3.12"
           - "3.13"
           - "3.14"
+        FREETHREADING:
+          - false
+        include:
+          - PY: "3.14"
+            FREETHREADING: true
 
     env:
       CIRUN: true
@@ -29,6 +34,10 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Patch env file to use freethreaded Python
+        if: fromJSON(matrix.FREETHREADING)
+        run: echo "  - python-freethreading" >> ci/environment-linux.yml
+
       - name: Setup conda
         uses: conda-incubator/setup-miniconda@v3
         with:

fsspec/implementations/tar.py

@@ -122,3 +122,14 @@ def _open(self, path, mode="rb", **kwargs):
         if details["type"] != "file":
             raise ValueError("Can only handle regular files")
         return self.tar.extractfile(path)
+
+    def close(self):
+        """Commits any write changes to the file. Done on ``del`` too."""
+        self.tar.close()
+
+    def __del__(self):
+        if hasattr(self, "tar"):
+            self.close()
+            del self.tar
+        if hasattr(self, "of") and hasattr(self.of, "__exit__"):
+            self.of.__exit__(None, None, None)

fsspec/implementations/zip.py

@@ -78,6 +78,8 @@ def __del__(self):
         if hasattr(self, "zip"):
             self.close()
             del self.zip
+        if hasattr(self, "of") and hasattr(self.of, "__exit__"):
+            self.of.__exit__(None, None, None)
 
     def close(self):
         """Commits any write changes to the file. Done on ``del`` too."""