Remove the dependency on the 'requests' Python package

The 'requests' package is not part of the standard Python library
and build set. We don't use the package extensively so to avoid
requiring dependencies, we can just use 'urllib' which is part of
the standard library and build set.

Ticket: ENT-8439
Changelog: Removed dependency on the 'requests' package

README.md

@@ -41,7 +41,6 @@ $ cfbs install .
 `cfbs` is implemented in Python and has a few dependencies:
 
 * Python 3.5 or newer
-* `requests` python library
 * `git` CLI installed and in PATH
 * `rsync`
 * `autoconf` for configuring masterfiles module (typical usage but not required)

cfbs/utils.py

@@ -9,8 +9,6 @@
 from collections import OrderedDict
 from shutil import rmtree
 
-import requests
-
 from cfbs.pretty import pretty
 
 SHA1_RE = re.compile(r"^[0-9a-f]{40}$")
@@ -84,9 +82,9 @@ def user_error(msg: str):
 
 
 def get_json(url: str) -> OrderedDict:
-    r = requests.get(url)
-    assert r.status_code >= 200 and r.status_code < 300
-    return r.json(object_pairs_hook=OrderedDict)
+    with urllib.request.urlopen(url) as r:
+        assert r.status >= 200 and r.status < 300
+        return json.loads(r.read().decode(), object_pairs_hook=OrderedDict)
 
 
 def get_or_read_json(path: str) -> OrderedDict:

requirements.txt

@@ -1 +0,0 @@
-requests>=2.25.1

setup.py

@@ -45,6 +45,5 @@
         ]
     },
     install_requires=[
-      "requests >= 2.25.1",
     ],
 )