Makes test_debian_compatibility more robust

Ignores packages on HTTP error

lints/test_debian_compatibility.py

@@ -1,7 +1,6 @@
 import json
 import subprocess
 from pathlib import Path
-from time import sleep
 from urllib.error import HTTPError
 from urllib.request import urlopen
 
@@ -22,10 +21,6 @@ cargo_metadata = json.loads(
     subprocess.check_output(["cargo", "metadata", "--format-version", "1"])
 )
 package_by_id = {package["id"]: package for package in cargo_metadata["packages"]}
-workspace_packages = {
-    package_id.split(" ")[0]
-    for package_id in cargo_metadata["workspace_default_members"]
-}
 debian_cache = {}
 errors = set()
 
@@ -34,34 +29,27 @@ def parse_version(version):
     return tuple(int(e) for e in version.split("-")[0].split("."))
 
 
-def fetch_debian_package_desc(debian_name):
-    url = f"https://sources.debian.org/api/src/{debian_name}/"
-    for i in range(0, 10):
-        try:
-            with urlopen(url) as response:
-                return json.loads(response.read().decode())
-        except HTTPError as e:
-            wait = 2**i
-            print(f"Error {e} from {url}, retrying after {wait}s")
-            sleep(wait)
-    raise Exception(f"Failed to fetch {url}")
-
-
 for package_id in cargo_metadata["workspace_default_members"]:
     package = package_by_id[package_id]
     if package["name"] in IGNORE_PACKAGES:
         continue
     for dependency in package["dependencies"]:
         if (
-            dependency["name"] in workspace_packages
+            "path" in dependency
             or dependency["name"] in ALLOWED_MISSING_PACKAGES
         ):
             continue
         candidate_debian_name = f"rust-{dependency['name'].replace('_', '-')}"
         if dependency["name"] not in debian_cache:
-            debian_cache[candidate_debian_name] = fetch_debian_package_desc(
-                candidate_debian_name
+            url = f"https://sources.debian.org/api/src/{candidate_debian_name}/"
+            try:
+                with urlopen(url) as response:
+                    debian_cache[candidate_debian_name] = json.loads(
+                        response.read().decode()
                     )
+            except HTTPError as e:
+                print(f"Error {e} from {url}, skipping {dependency['name']}")
+                continue
         debian_package = debian_cache[candidate_debian_name]
         if "error" in debian_package:
             errors.add(f"No Debian package found for {dependency['name']}")