ci: Create constants for retry mechanism variables

Author: sdn4z

dependencies/scripts/download_packages.py

@@ -19,9 +19,23 @@
 )
 
 
+class ServerError(Exception):
+    """Custom exception for HTTP 5xx errors."""
+
+
+# Directory name
 DEPENDENCIES_DIR = "dependencies"
+
+# Sources
 TOP_PYPI_SOURCE = "https://hugovk.github.io/top-pypi-packages/top-pypi-packages.min.json"
 TOP_NPM_SOURCE = "https://packages.ecosyste.ms/api/v1/registries/npmjs.org/packages"
+
+# Retry configuration constants
+RETRY_EXCEPTIONS = (httpx.TransportError, httpx.TimeoutException, ServerError)
+RETRY_ATTEMPTS = 10
+RETRY_WAIT_JITTER = 1
+RETRY_WAIT_EXP_BASE = 2
+RETRY_WAIT_MAX = 8
 TIMEOUT = 90
 
 
@@ -33,10 +47,6 @@ def parse_pypi(data: dict[str, Any]) -> set[str]:
     return {row["project"] for row in data["rows"]}
 
 
-class ServerError(Exception):
-    """Custom exception for HTTP 5xx errors."""
-
-
 @dataclass(frozen=True)
 class Ecosystem:
     url: str
@@ -94,11 +104,11 @@ def download(
 
 
 @stamina.retry(
-    on=(httpx.TransportError, httpx.TimeoutException, ServerError),
-    attempts=10,
-    wait_jitter=1,
-    wait_exp_base=2,
-    wait_max=8,
+    on=RETRY_EXCEPTIONS,
+    attempts=RETRY_ATTEMPTS,
+    wait_jitter=RETRY_WAIT_JITTER,
+    wait_exp_base=RETRY_WAIT_EXP_BASE,
+    wait_max=RETRY_WAIT_MAX,
 )
 def get_packages(
     base_url: str, parser: Callable[[dict[str, Any]], set[str]], params: dict[str, Any] | None = None