csgrep --set-imp-level: set importance level on all defects

... to the specified value

Related: https://issues.redhat.com/browse/OSH-343
Closes: #149

src/csgrep.cc

@@ -577,6 +577,7 @@ int main(int argc, char *argv[])
             ("warning-rate-limit",  po::value<int>(),           "stop processing a warning if the count of its occurrences exceeds the specified limit")
             ("limit-msg-len",       po::value<int>(),           "limit message length by a number provided")
             ("remove-duplicates,u",                             "remove defects that are not unique by their key event")
+            ("set-imp-level",       po::value<int>(),           "set importance level on all defects to the specified value")
             ("set-scan-prop",       po::value<TStringList>(),   "NAME:VALUE pair to override the specified scan property")
             ("strip-path-prefix",   po::value<string>(),        "string prefix to strip from path (applied after all filters)")
             ("prepend-path-prefix", po::value<string>(),        "string prefix to prepend to relative paths (applied after all filters)")
@@ -682,6 +683,7 @@ int main(int argc, char *argv[])
     if (!chainDecoratorIntArg<EventPrunner>(&eng, vm, "prune-events")
             || !chainDecoratorIntArg<RateLimitter>(&eng, vm, "warning-rate-limit")
             || !chainDecoratorIntArg<MsgTrimmer>(&eng, vm, "limit-msg-len")
+            || !chainDecoratorIntArg<ImpLevelSetter>(&eng, vm, "set-imp-level")
             || !chainDecoratorIntArg<CtxEmbedder>(&eng, vm, "embed-context"))
         // error message already printed, eng already feeed
         return 1;

src/lib/filter.cc

@@ -337,3 +337,14 @@ void MsgTrimmer::handleDef(const Defect &defOrig)
 
     agent_->handleDef(def);
 }
+
+
+// /////////////////////////////////////////////////////////////////////////////
+// implementation of ImpLevelSetter
+
+void ImpLevelSetter::handleDef(const Defect &defOrig)
+{
+    Defect def = defOrig;
+    def.imp = impLevel_;
+    agent_->handleDef(def);
+}

src/lib/filter.hh

@@ -192,4 +192,19 @@ class MsgTrimmer: public GenericAbstractFilter {
         void handleDef(const Defect &defOrig) override;
 };
 
+/// set importance level on all defects to the specified value
+class ImpLevelSetter: public GenericAbstractFilter {
+    private:
+        const int impLevel_;
+
+    public:
+        ImpLevelSetter(AbstractWriter *agent, const int impLevel):
+            GenericAbstractFilter(agent),
+            impLevel_(impLevel)
+        {
+        }
+
+        void handleDef(const Defect &defOrig) override;
+};
+
 #endif /* H_GUARD_FILTER_H */

tests/csgrep/0117-csgrep-set-imp-level-args.txt

@@ -0,0 +1 @@
+--mode=json --set-imp-level=0

tests/csgrep/CMakeLists.txt

@@ -160,3 +160,4 @@ test_csgrep("0113-gitleaks-limit-msg-len"             )
 test_csgrep("0114-json-sc-column"                     )
 test_csgrep("0115-csgrep-imp-filter"                  )
 test_csgrep("0116-csgrep-warning-rate-limit"          )
+test_csgrep("0117-csgrep-set-imp-level"               )