Add RHEL releases (#22)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/rhel.py

@@ -0,0 +1,31 @@
+import json
+import urllib.request
+from bs4 import BeautifulSoup
+import re
+
+URL = "https://access.redhat.com/articles/3078"
+# https://regex101.com/r/877ibq/1
+regex = r"RHEL (?P<major>\d)(\. ?(?P<minor>\d+))?(( Update (?P<minor2>\d))| GA)?"
+
+list = {}
+headers = {
+  'user-agent': 'mozilla'
+}
+req = urllib.request.Request(URL,headers=headers)
+
+with urllib.request.urlopen(req, timeout=5) as response:
+  soup = BeautifulSoup(response, features="html5lib")
+  for tr in soup.findAll('tr'):
+    td_list = tr.findAll('td')
+    if len(td_list)>0:
+      version = td_list[0].get_text()
+      m = re.match(regex, version.strip()).groupdict()
+      version = m['major']
+      if m['minor']:
+        version += ".%s" % m['minor']
+      if m['minor2']:
+        version += ".%s" % m['minor2']
+      list[version] = td_list[1].get_text()
+
+with open('releases/redhat.json', 'w') as f:
+  f.write(json.dumps(list, indent=2))