_get_file: fix makedirs call when the lpath is relative and in the wo…

…rking directory (#618)

gcsfs/core.py

@@ -1534,7 +1534,8 @@ async def _get_file_request(
             callback.set_size(size)
 
             checker = get_consistency_checker(consistency)
-            os.makedirs(os.path.dirname(lpath), exist_ok=True)
+            lparent = os.path.dirname(lpath) or os.curdir
+            os.makedirs(lparent, exist_ok=True)
             with open(lpath, "wb") as f2:
                 while True:
                     data = await r.content.read(4096 * 32)

gcsfs/tests/test_core.py

@@ -515,6 +515,19 @@ def test_get_put_file_in_dir(protocol, gcs):
         assert gcs.cat(protocol + TEST_BUCKET + "/temp_dir/accounts.1.json") == data1
 
 
+@pytest.mark.parametrize("protocol", ["", "gs://", "gcs://"])
+def test_get_file_to_current_working_directory(monkeypatch, protocol, gcs):
+    fn = protocol + TEST_BUCKET + "/temp"
+    gcs.pipe(fn, b"hello world")
+
+    with tempdir() as dn:
+        os.makedirs(dn)
+        monkeypatch.chdir(dn)
+        gcs.get_file(fn, "temp")
+        with open("temp", mode="rb") as f:
+            assert f.read() == b"hello world"
+
+
 def test_special_characters_filename(gcs: GCSFileSystem):
     special_filename = """'!"`#$%&'()+,-.<=>?@[]^_{}~/'"""
     full_path = TEST_BUCKET + "/" + special_filename