Align custom scripts with generic scripts (#445)

Align custom scripts with generic scripts, making them configurable. This has a few advantages:

- script code is more unified,
- no more hard-coded method names in scripts, which is less error prone and make it easier to rename scripts,
- no more hard coded product names in scripts, which is less error prone and make it easier to rename products,
- less hard-coded URLs and regexes in scripts, which makes auto-configuration more expressive / updatable,

Also added method `endoflife.list_configs_from_argv()` so that it is easier to manipulate scripts arguments.

src/rhel.py

@@ -1,24 +1,25 @@
 import re
 
 from bs4 import BeautifulSoup
-from common import dates, http, releasedata
+from common import dates, endoflife, http, releasedata
 
 # https://regex101.com/r/877ibq/1
 VERSION_PATTERN = re.compile(r"RHEL (?P<major>\d)(\. ?(?P<minor>\d+))?(( Update (?P<minor2>\d))| GA)?")
 
-with releasedata.ProductData("redhat") as product_data:
-    response = http.fetch_url("https://access.redhat.com/articles/3078")
-    soup = BeautifulSoup(response.text, features="html5lib")
+for config in endoflife.list_configs_from_argv():
+    with releasedata.ProductData(config.product) as product_data:
+        response = http.fetch_url(config.url)
+        soup = BeautifulSoup(response.text, features="html5lib")
 
-    for tr in soup.findAll("tr"):
-        td_list = tr.findAll("td")
-        if len(td_list) == 0:
-            continue
+        for tr in soup.findAll("tr"):
+            td_list = tr.findAll("td")
+            if len(td_list) == 0:
+                continue
 
-        version_str = td_list[0].get_text().strip()
-        version_match = VERSION_PATTERN.match(version_str).groupdict()
-        version = version_match["major"]
-        version += ("." + version_match["minor"]) if version_match["minor"] else ""
-        version += ("." + version_match["minor2"]) if version_match["minor2"] else ""
-        date = dates.parse_date(td_list[1].get_text())
-        product_data.declare_version(version, date)
+            version_str = td_list[0].get_text().strip()
+            version_match = VERSION_PATTERN.match(version_str).groupdict()
+            version = version_match["major"]
+            version += ("." + version_match["minor"]) if version_match["minor"] else ""
+            version += ("." + version_match["minor2"]) if version_match["minor2"] else ""
+            date = dates.parse_date(td_list[1].get_text())
+            product_data.declare_version(version, date)