Merge pull request #5605 from certbot/rm-eol-2.6

Drop Python 2.6 and 3.3 support

letsencrypt-auto-source/letsencrypt-auto

@@ -249,7 +249,7 @@ DeprecationBootstrap() {
   fi
 }
 
-MIN_PYTHON_VERSION="2.6"
+MIN_PYTHON_VERSION="2.7"
 MIN_PYVER=$(echo "$MIN_PYTHON_VERSION" | sed 's/\.//')
 # Sets LE_PYTHON to Python version string and PYVER to the first two
 # digits of the python version
@@ -1240,6 +1240,7 @@ anything goes wrong, it will exit with a non-zero status code.
 from __future__ import print_function
 from distutils.version import StrictVersion
 from hashlib import sha256
+from os import environ
 from os.path import join
 from pipes import quote
 from shutil import rmtree
@@ -1273,33 +1274,32 @@ except ImportError:
     from urllib.parse import urlparse  # 3.4
 
 
-__version__ = 1, 3, 0
+__version__ = 1, 5, 0
 PIP_VERSION = '9.0.1'
+DEFAULT_INDEX_BASE = 'https://pypi.python.org'
 
 
 # wheel has a conditional dependency on argparse:
 maybe_argparse = (
-    [('https://pypi.python.org/packages/18/dd/'
-      'e617cfc3f6210ae183374cd9f6a26b20514bbb5a792af97949c5aacddf0f/'
+    [('18/dd/e617cfc3f6210ae183374cd9f6a26b20514bbb5a792af97949c5aacddf0f/'
       'argparse-1.4.0.tar.gz',
       '62b089a55be1d8949cd2bc7e0df0bddb9e028faefc8c32038cc84862aefdd6e4')]
     if version_info < (2, 7, 0) else [])
 
 
-PACKAGES = maybe_argparse + [
-    # Pip has no dependencies, as it vendors everything:
-    ('https://pypi.python.org/packages/11/b6/'
-     'abcb525026a4be042b486df43905d6893fb04f05aac21c32c638e939e447/'
-     'pip-{0}.tar.gz'
-     .format(PIP_VERSION),
-     '09f243e1a7b461f654c26a725fa373211bb7ff17a9300058b205c61658ca940d'),
+# Pip has no dependencies, as it vendors everything:
+PIP_PACKAGE = [
+    ('11/b6/abcb525026a4be042b486df43905d6893fb04f05aac21c32c638e939e447/'
+     'pip-{0}.tar.gz'.format(PIP_VERSION),
+     '09f243e1a7b461f654c26a725fa373211bb7ff17a9300058b205c61658ca940d')]
+
+
+OTHER_PACKAGES = maybe_argparse + [
     # This version of setuptools has only optional dependencies:
-    ('https://pypi.python.org/packages/69/65/'
-     '4c544cde88d4d876cdf5cbc5f3f15d02646477756d89547e9a7ecd6afa76/'
-     'setuptools-20.2.2.tar.gz',
-     '24fcfc15364a9fe09a220f37d2dcedc849795e3de3e4b393ee988e66a9cbd85a'),
-    ('https://pypi.python.org/packages/c9/1d/'
-     'bd19e691fd4cfe908c76c429fe6e4436c9e83583c4414b54f6c85471954a/'
+    ('59/88/2f3990916931a5de6fa9706d6d75eb32ee8b78627bb2abaab7ed9e6d0622/'
+     'setuptools-29.0.1.tar.gz',
+     'b539118819a4857378398891fa5366e090690e46b3e41421a1e07d6e9fd8feb0'),
+    ('c9/1d/bd19e691fd4cfe908c76c429fe6e4436c9e83583c4414b54f6c85471954a/'
      'wheel-0.29.0.tar.gz',
      '1ebb8ad7e26b448e9caa4773d2357849bf80ff9e313964bcaf79cbf0201a1648')
 ]
@@ -1320,12 +1320,13 @@ def hashed_download(url, temp, digest):
     # >=2.7.9 verifies HTTPS certs itself, and, in any case, the cert
     # authenticity has only privacy (not arbitrary code execution)
     # implications, since we're checking hashes.
-    def opener():
+    def opener(using_https=True):
         opener = build_opener(HTTPSHandler())
-        # Strip out HTTPHandler to prevent MITM spoof:
-        for handler in opener.handlers:
-            if isinstance(handler, HTTPHandler):
-                opener.handlers.remove(handler)
+        if using_https:
+            # Strip out HTTPHandler to prevent MITM spoof:
+            for handler in opener.handlers:
+                if isinstance(handler, HTTPHandler):
+                    opener.handlers.remove(handler)
         return opener
 
     def read_chunks(response, chunk_size):
@@ -1335,8 +1336,9 @@ def hashed_download(url, temp, digest):
                 break
             yield chunk
 
-    response = opener().open(url)
-    path = join(temp, urlparse(url).path.split('/')[-1])
+    parsed_url = urlparse(url)
+    response = opener(using_https=parsed_url.scheme == 'https').open(url)
+    path = join(temp, parsed_url.path.split('/')[-1])
     actual_hash = sha256()
     with open(path, 'wb') as file:
         for chunk in read_chunks(response, 4096):
@@ -1349,6 +1351,24 @@ def hashed_download(url, temp, digest):
     return path
 
 
+def get_index_base():
+    """Return the URL to the dir containing the "packages" folder.
+
+    Try to wring something out of PIP_INDEX_URL, if set. Hack "/simple" off the
+    end if it's there; that is likely to give us the right dir.
+
+    """
+    env_var = environ.get('PIP_INDEX_URL', '').rstrip('/')
+    if env_var:
+        SIMPLE = '/simple'
+        if env_var.endswith(SIMPLE):
+            return env_var[:-len(SIMPLE)]
+        else:
+            return env_var
+    else:
+        return DEFAULT_INDEX_BASE
+
+
 def main():
     pip_version = StrictVersion(check_output(['pip', '--version'])
                                 .decode('utf-8').split()[1])
@@ -1356,17 +1376,24 @@ def main():
     if pip_version >= min_pip_version:
         return 0
     has_pip_cache = pip_version >= StrictVersion('6.0')
-
+    index_base = get_index_base()
     temp = mkdtemp(prefix='pipstrap-')
     try:
-        downloads = [hashed_download(url, temp, digest)
-                     for url, digest in PACKAGES]
-        check_output('pip install --no-index --no-deps -U ' +
-                     # Disable cache since we're not using it and it otherwise
-                     # sometimes throws permission warnings:
-                     ('--no-cache-dir ' if has_pip_cache else '') +
-                     ' '.join(quote(d) for d in downloads),
-                     shell=True)
+        # We download and install pip first, then the rest, to avoid the bug
+        # https://github.com/certbot/certbot/issues/4938.
+        pip_downloads, other_downloads = [
+            [hashed_download(index_base + '/packages/' + path,
+                             temp,
+                             digest)
+             for path, digest in packages]
+            for packages in (PIP_PACKAGE, OTHER_PACKAGES)]
+        for downloads in (pip_downloads, other_downloads):
+            check_output('pip install --no-index --no-deps -U ' +
+                         # Disable cache since we're not using it and it
+                         # otherwise sometimes throws permission warnings:
+                         ('--no-cache-dir ' if has_pip_cache else '') +
+                         ' '.join(quote(d) for d in downloads),
+                         shell=True)
     except HashError as exc:
         print(exc)
     except Exception: