FIX: download MNE sample data tarball directly from OSF via async pyfetch in JupyterLite

Author: natinew77-creator

doc/conf.py

@@ -636,33 +636,23 @@
         "os.makedirs(mne_data_path, exist_ok=True)\n"
         "if mne_data_path == '/tmp/mne_data':\n"
         "    from pyodide.http import pyfetch\n"
+        "    import tarfile\n"
         "    sample_dir = os.path.join(mne_data_path, 'MNE-sample-data')\n"
-        "    for req in [\n"
-        "        'version.txt',\n"
-        "        'MEG/sample/sample_audvis_raw.fif',\n"
-        "        'MEG/sample/sample_audvis_filt-0-40_raw.fif',\n"
-        "        'MEG/sample/sample_audvis_raw-eve.fif',\n"
-        "        'MEG/sample/sample_audvis-ave.fif',\n"
-        "        'MEG/sample/sample_audvis-cov.fif',\n"
-        "        'MEG/sample/sample_audvis-meg-eeg-oct-6-fwd.fif',\n"
-        "        'MEG/sample/sample_audvis-meg-oct-6-meg-inv.fif',\n"
-        "        'subjects/sample/mri/T1.mgz',\n"
-        "        'subjects/sample/bem/sample-oct-6-src.fif',\n"
-        "        'subjects/sample/bem/sample-5120-5120-5120-bem-sol.fif',\n"
-        "        'subjects/sample/surf/rh.pial',\n"
-        "        'subjects/sample/surf/lh.pial',\n"
-        "    ]:\n"
-        "        dest = os.path.join(sample_dir, req)\n"
-        "        if not os.path.exists(dest):\n"
-        "            os.makedirs(os.path.dirname(dest), exist_ok=True)\n"
-        "            try:\n"
-        "                res = await pyfetch(\n"
-        "                    f'../files/mne_data/MNE-sample-data/{req}'\n"
-        "                )\n"
-        "                with open(dest, 'wb') as f:\n"
-        "                    f.write(await res.bytes())\n"
-        "            except Exception as e:\n"
-        "                print(f'Failed to fetch {req}: {e}')\n"
+        "    if not os.path.exists(sample_dir):\n"
+        "        print('Downloading MNE-sample-data via pyfetch...')\n"
+        "        try:\n"
+        "            res = await pyfetch(\n"
+        "                'https://osf.io/86qa2/download?version=5'\n"
+        "            )\n"
+        "            tar_path = os.path.join(mne_data_path, 'sample.tar.gz')\n"
+        "            with open(tar_path, 'wb') as f:\n"
+        "                f.write(await res.bytes())\n"
+        "            with tarfile.open(tar_path, 'r:gz') as tar:\n"
+        "                tar.extractall(mne_data_path)\n"
+        "            os.remove(tar_path)\n"
+        "            print('MNE-sample-data extracted successfully.')\n"
+        "        except Exception as e:\n"
+        "            print(f'Failed to fetch or extract sample data: {e}')\n"
         "os.environ['MNE_DATA'] = mne_data_path\n"
         "os.environ['MNE_DATASETS_SAMPLE_PATH'] = mne_data_path\n"
         "\n"