Add `get_packages` function.

* gd_diff.py (get_packages): New function
* setup.py: Add `beautifulsoup4` and `requests` as installation
requirements; Add `mock` as dev requirements.
* tests/test_gd_diff.py (test_get_packages_error)
(test_get_packages): New functions

1 files changed, 28 insertions, 0 deletions

diff --git a/gd_diff.py b/gd_diff.py
index 6e18cb5..b628b38 100644
--- a/gd_diff.py
+++ b/gd_diff.py
@@ -11,9 +11,12 @@ import re
 import shlex
 import sys
 
+import requests
+
 from os import path
 from subprocess import run, PIPE
 
+from bs4 import BeautifulSoup
 
 # list of recognized fields.
 field_list = [
@@ -68,6 +71,31 @@ def read_packages(pkgs_file):
     return pkgs_iter
 
 
+def get_packages(release):
+    """Prints out list packages for `release`.
+
+    List of packages is slurped from
+        http://bzr.savannah.gnu.org/lh/gnewsense/packages-`release`
+    """
+    url = 'http://bzr.savannah.gnu.org/lh/gnewsense/packages-{}/'
+    req = url.format(release)
+
+    try:
+        res = requests.get(req)
+    except ConnectionError as ce:
+        print('ERROR: Problem GETting {} \n{}'.format(req, ce))
+        sys.exit(1)
+
+    if res.status_code != 200:
+        print('{}: Error GETting {}'.format(res.status_code, req))
+        sys.exit(1)
+
+    html_forest = BeautifulSoup(res.text, 'html.parser')
+
+    for td in html_forest.find_all('td', class_='autcell'):
+        print(td.a.string.strip())
+
+
 def save_gns_readme(content, release, pkg, local_dir):
     """Save README.gNewsense locally.