Fix some pylint problems.

check-release.py

@@ -0,0 +1,79 @@
+#!/usr/bin/python3
+
+import argparse
+import sys
+from datetime import date, datetime, timedelta
+import requests
+
+verbose = False
+
+def cli_parser():
+    parser = argparse.ArgumentParser(
+        description="Fedora '/etc/os-release' support date validator."
+    )
+
+    parser.add_argument(
+        "--test", "-t",
+        type=str,
+        required=True,
+        help="Test to perform [future, compare]"
+    )
+
+    parser.add_argument(
+        "--verbose", "-v",
+        action="store_true",
+        help="Prints detailed info on the screen."
+    )
+
+    return parser.parse_args()
+
+def log(*args, **kwargs):
+    print(*args, **kwargs) if verbose else None
+
+def get_file_support() -> date:
+    """ Returns the support date from the os-release file. """
+    with open('/etc/os-release', 'r') as release:
+        lines = release.readlines()
+        log("File content read.")
+
+    support_day = datetime.fromtimestamp(0)
+    for line in lines:
+        if "SUPPORT_END" in line:
+            _, value = line.split('=')
+            value = value.strip()
+    if value:
+        support_day = date.fromisoformat(value)
+    return support_day
+
+def support_date_in_future() -> bool:
+    """ This function checks the support date from the os-release
+    file, compares it with the current system date and tests if
+    the os-release support date lies at least 12 months in the future. """
+
+    # Get the necessary values from the operating system.
+    today = datetime.today().date()
+    log("Current date on tested system =>", today)
+    tomorrow = today + timedelta(days=365)
+    log("Minimal SUPPORT_END calculated from system time =>", tomorrow)
+    support = get_file_support()
+    log("Real /etc/os-release SUPPORT_END =>", support)
+
+    # Test if the support end date is in the future.
+    result = False
+    if support >= tomorrow:
+        log("Real SUPPORT_END is one year in the future.")
+        log("Test passed.")
+        result = True
+    else:
+        log("Real SUPPORT_END is NOT one year in the future.")
+        log("Test failed.")
+        result = False
+    return result
+
+args = cli_parser()
+verbose = args.verbose
+result = support_date_in_future()
+if result:
+    sys.exit(12)
+else:
+    sys.exit(25)