[virtualbox-version] Add method (#480)

Track versions using https://download.virtualbox.org/virtualbox/.

Also rename virtualbox to virtualbox-releases.

---------

Co-authored-by: Marc Wrobel <marc.wrobel@gmail.com>

src/virtualbox-releases.py

@@ -0,0 +1,34 @@
+import logging
+import re
+
+from common import dates, http
+from common.releasedata import ProductData, config_from_argv
+
+"""Fetches releases from VirtualBox download page."""
+
+EOL_REGEX = re.compile(r"^\(no longer supported, support ended (?P<value>\d{4}/\d{2})\)$")
+
+config = config_from_argv()
+with ProductData(config.product) as product_data:
+    html = http.fetch_html(config.url)
+
+    for li in html.select_one("#DownloadVirtualBoxOldBuilds + ul").find_all("li"):
+        li_text = li.find("a").text.strip()
+
+        release_match = config.first_match(li_text)
+        if not release_match:
+            logging.info(f"Skipping '{li_text}': does not match expected pattern")
+            continue
+
+        release_name = release_match.group("value")
+        release = product_data.get_release(release_name)
+
+        eol_text = li.find("em").text.lower().strip()
+        eol_match = EOL_REGEX.match(eol_text)
+        if not eol_match:
+            logging.info(f"Ignoring '{eol_text}': does not match {EOL_REGEX}")
+            continue
+
+        eol_date_str = eol_match.group("value")
+        eol_date = dates.parse_month_year_date(eol_date_str)
+        release.set_eol(eol_date)