fix: reverse the filters order when grep (#4332)

- this is to avoid the first keyword from starting with a dash ('-')
- see RHINENG-15287

Signed-off-by: Xiangce Liu <[email protected]>
(cherry picked from commit d1065f5)

insights/core/spec_factory.py

@@ -208,7 +208,7 @@ def __init__(self, relative_path, root="/", save_as=None, ds=None, ctx=None, cle
             if self.ds and filters.ENABLED
             else False
         )
-        self._filters = filters.get_filters(self.ds, True) if self.ds else set()
+        self._filters = filters.get_filters(self.ds, True) if self.ds else dict()
 
         self.validate()
 
@@ -267,7 +267,9 @@ def create_args(self):
         args = []
         if self._filters:
             log.debug("Pre-filtering %s", self.relative_path)
-            args.append(["grep", "-F", "\n".join(self._filters), self.path])
+            args.append(
+                ["grep", "-F", "\n".join(sorted(self._filters.keys(), reverse=True)), self.path]
+            )
 
         return args
 
@@ -361,7 +363,7 @@ def __init__(
             if self.ds and filters.ENABLED
             else False
         )
-        self._filters = filters.get_filters(self.ds, True) if self.ds else set()
+        self._filters = filters.get_filters(self.ds, True) if self.ds else dict()
 
         self.validate()
 
@@ -389,7 +391,7 @@ def create_args(self):
 
         if self.split and self._filters:
             log.debug("Pre-filtering  %s", self.relative_path)
-            command.append(["grep", "-F", "\n".join(self._filters)])
+            command.append(["grep", "-F", "\n".join(sorted(self._filters.keys(), reverse=True))])
 
         return command