[aws-lambda] Add automation (#166)

The purpose of this new script is to be alerted of new runtimes, while not making updates to the original product file (because release dates cannot be fetched from AWS documentation).

src/aws-lambda.py

@@ -0,0 +1,57 @@
+from bs4 import BeautifulSoup
+from common import endoflife
+
+"""Fetch new AWS lambda runtimes from https://docs.aws.amazon.com.
+
+This script does not retrieve release dates, as they are only available
+in release announcements. Instead, it uses the release dates from the
+endoflife.date product file. This has the advantage of being warned
+about new releases, without having releaseDate information (wrongly)
+updated.
+
+If one day release dates are available in the AWS documentation, it would
+be better to make use them though. Note that this would also be unnecessary
+if it was possible to disable release / latest release dates updates in the
+latest.py script.
+"""
+
+PRODUCT = 'aws-lambda'
+URL = 'https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html'
+
+
+def fetch_product_file_release_date(releaseCycle, product):
+    if 'releases' in product.keys():
+        for release in product['releases']:
+            if releaseCycle == release['releaseCycle']:
+                return release['releaseDate'].strftime("%Y-%m-%d")
+
+    return '9999-12-31'
+
+
+print(f"::group::{PRODUCT}")
+releases_data = {}
+try:
+    releases_data = endoflife.load_product(PRODUCT)
+except FileNotFoundError:
+    releases_data = {}
+    print(f"{PRODUCT} file not found, real release dates will not be used.")
+
+response = endoflife.fetch_url(URL)
+soup = BeautifulSoup(response, features="html5lib")
+
+versions = {}
+for row in soup.find_all("tr"):
+    cells = row.find_all("td")
+    if len(cells) == 6:  # Supported Runtimes
+        identifier = cells[1].get_text().strip()
+    elif len(cells) == 5:  # Unsupported Runtimes
+        identifier = cells[1].get_text().strip()
+    else:  # Header rows
+        continue
+
+    date = fetch_product_file_release_date(identifier, releases_data)
+    versions[identifier] = date
+    print(f"{identifier}: {date}")
+
+endoflife.write_releases(PRODUCT, versions)
+print("::endgroup::")

src/common/endoflife.py

@@ -8,6 +8,13 @@ from os import path
 USER_AGENT = 'Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0'
 
 
+def load_product(product_name, pathname="website/products"):
+    """Load the product's file frontmatter.
+    """
+    with open(f"{pathname}/{product_name}.md", "r") as f:
+        return frontmatter.load(f)
+
+
 def list_products(method, products_filter=None, pathname="website/products"):
     """Return a list of products that are using the same given update method.
     """