Improve scripts execution orchestration (#299)

Until now products could declare multiple auto-update methods, but they all had to be of the same kind.
For example if you used the git auto-update method, you could not use an additional github_releases or custom auto-update method.
This is an issue as it prevents us to extend the auto-update process, for example by having a product using the 'git' auto-update method to retrieve all the versions, and a custom script to retrieve support and EOL dates.

This improve the scripts execution orchestration to be able to support auto configurations using a mix of methods, meaning:

- multiple kind of methods, such as git and github_release,
- or multiple custom methods.

A side-effect of those changes is that now a failure in a generic script does not cancel the update of subsequent products.

Another side-effect, unwanted this time, is that now custom scripts managing multiple products, such as apple.py, are now executed multiple times instead of once.

src/distrowatch.py

@@ -6,21 +6,21 @@ from common import dates, endoflife, http, releasedata
 METHOD = 'distrowatch'
 
 p_filter = sys.argv[1] if len(sys.argv) > 1 else None
-for product in endoflife.list_products(METHOD, p_filter):
-    with releasedata.ProductData(product.name) as product_data:
-        for config in product.get_auto_configs(METHOD):
-            response = http.fetch_url(f"https://distrowatch.com/index.php?distribution={config.url}")
-            soup = BeautifulSoup(response.text, features="html5lib")
+m_filter = sys.argv[2] if len(sys.argv) > 2 else None
+for config in endoflife.list_configs(p_filter, METHOD, m_filter):
+    with releasedata.ProductData(config.product) as product_data:
+        response = http.fetch_url(f"https://distrowatch.com/index.php?distribution={config.url}")
+        soup = BeautifulSoup(response.text, features="html5lib")
 
-            for table in soup.select("td.News1>table.News"):
-                headline = table.select_one("td.NewsHeadline a[href]").get_text().strip()
-                versions_match = config.first_match(headline)
-                if not versions_match:
-                    continue
+        for table in soup.select("td.News1>table.News"):
+            headline = table.select_one("td.NewsHeadline a[href]").get_text().strip()
+            versions_match = config.first_match(headline)
+            if not versions_match:
+                continue
 
-                # multiple versions may be released at once (e.g. Ubuntu 16.04.7 and 18.04.5)
-                versions = config.render(versions_match).split("\n")
-                date = dates.parse_date(table.select_one("td.NewsDate").get_text())
+            # multiple versions may be released at once (e.g. Ubuntu 16.04.7 and 18.04.5)
+            versions = config.render(versions_match).split("\n")
+            date = dates.parse_date(table.select_one("td.NewsDate").get_text())
 
-                for version in versions:
-                    product_data.declare_version(version, date)
+            for version in versions:
+                product_data.declare_version(version, date)