Description: prevent dataset download during doc build. Guard with debian
 specific environment variable to avoid breaking the functionality.
Author: Mo Zhou <lumin@debian.org>
Forward: not-needed

--- scikit-learn.orig/sklearn/datasets/_base.py
+++ scikit-learn/sklearn/datasets/_base.py
@@ -1428,6 +1428,8 @@
     file_path: str
         Full path of the created file.
     """
+    if int(os.getenv('DEBIAN_POLICY_SECTION_4_9_NO_NETWORK_ACCESS', '0')) > 0:
+        raise IOError('Debian Policy Section 4.9 prohibits network access during build')
 
     file_path = remote.filename if dirname is None else join(dirname, remote.filename)
     urlretrieve(remote.url, file_path)
--- scikit-learn.orig/sklearn/datasets/_openml.py
+++ scikit-learn/sklearn/datasets/_openml.py
@@ -988,6 +988,9 @@
     dtypes: category(9), int64(6)
     memory usage: 2.7 MB
     """
+    if int(os.getenv('DEBIAN_POLICY_SECTION_4_9_NO_NETWORK_ACCESS', '0')) > 0:
+        raise TimeoutError('Debian Policy Section 4.9 prohibits network access during build')
+
     if cache is False:
         # no caching will be applied
         data_home = None
--- scikit-learn.orig/examples/applications/plot_stock_market.py
+++ scikit-learn/examples/applications/plot_stock_market.py
@@ -23,6 +23,7 @@
 # `data.nasdaq.com <https://data.nasdaq.com/>`_ and
 # `alphavantage.co <https://www.alphavantage.co/>`_.
 
+import os
 import sys
 
 import numpy as np
@@ -98,6 +99,8 @@
         "https://raw.githubusercontent.com/scikit-learn/examples-data/"
         "master/financial-data/{}.csv"
     )
+    if int(os.getenv('DEBIAN_POLICY_SECTION_4_9_NO_NETWORK_ACCESS', '0')) > 0:
+        raise TimeoutError('Debian Policy Section 4.9 prohibits network access during build')
     quotes.append(pd.read_csv(url.format(symbol)))
 
 close_prices = np.vstack([q["close"] for q in quotes])
--- scikit-learn.orig/examples/applications/plot_out_of_core_classification.py
+++ scikit-learn/examples/applications/plot_out_of_core_classification.py
@@ -19,6 +19,7 @@
 # License: BSD 3 clause
 
 import itertools
+import os
 import re
 import sys
 import tarfile
@@ -166,7 +167,8 @@
                 sys.stdout.write("\rdownloaded %s / %s" % (current_sz_mb, total_sz_mb))
 
         archive_path = data_path / ARCHIVE_FILENAME
-
+        if int(os.getenv('DEBIAN_POLICY_SECTION_4_9_NO_NETWORK_ACCESS', '0')) > 0:
+            raise TimeoutError('Debian Policy Section 4.9 prohibits network access during build')
         urlretrieve(DOWNLOAD_URL, filename=archive_path, reporthook=progress)
         if _not_in_sphinx():
             sys.stdout.write("\r")