fix(lint): disable rule caching during linting (#2817)

CHANGELOG.md

@@ -20,6 +20,7 @@
 ### Bug Fixes
 - Fixed insecure deserialization vulnerability in YAML loading @0x1622 (#2770)
 - loader: gracefully handle ELF files with unsupported architectures kamranulhaq2002@gmail.com #2800
+- lint: disable rule caching during linting @Maijin #2817
 
 ### capa Explorer Web
 

capa/main.py

@@ -661,7 +661,9 @@ def get_rules_from_cli(args) -> RuleSet:
     raises:
       ShouldExitError: if the program is invoked incorrectly and should exit.
     """
-    enable_cache: bool = True
+    enable_cache: bool = getattr(args, "enable_cache", True)
+    # this allows calling functions to easily disable rule caching, e.g., used by the rule linter to avoid
+
     try:
         if capa.helpers.is_running_standalone() and args.is_default_rules:
             cache_dir = get_default_root() / "cache"

scripts/lint.py

@@ -1229,6 +1229,7 @@ def main(argv=None):
 
     time0 = time.time()
 
+    args.enable_cache = False
     try:
         rules = capa.main.get_rules_from_cli(args)
     except capa.main.ShouldExitError as e: