Remove interface from inheritance graph.

slither/__main__.py

@@ -336,10 +336,10 @@ def parse_args(
     )
 
     group_printer.add_argument(
-        "--exclude-interfaces",
-        help= "Exclude interfaces from inheritance-graph printer",
+        "--include-interfaces",
+        help="Include interfaces from inheritance-graph printer",
         action="store_true",
-        dest="exclude_interfaces",
+        dest="include_interfaces",
         default=False,
     )
 

slither/printers/inheritance/inheritance_graph.py

@@ -98,8 +98,14 @@ class PrinterInheritanceGraph(AbstractPrinter):
         """
         ret = ""
 
-        # Remove contracts that have "mock" in the name and if --exclude-interface removes inherited interfaces
-        inheritance = [i for i in contract.immediate_inheritance if "mock" not in i.name.lower() and (not self.slither.exclude_interfaces or self.slither.exclude_interfaces and not i.is_interface)]
+        # Remove contracts that have "mock" in the name and if --include-interfaces in False (default)
+        # removes inherited interfaces
+        inheritance = [
+            i
+            for i in contract.immediate_inheritance
+            if "mock" not in i.name.lower()
+            and (not i.is_interface or self.slither.include_interfaces)
+        ]
 
         # Add arrows (number them if there is more than one path so we know order of declaration for inheritance).
         if len(inheritance) == 1:
@@ -116,6 +122,7 @@ class PrinterInheritanceGraph(AbstractPrinter):
             for f in contract.functions
             if not f.is_constructor
             and not f.is_constructor_variables
+            and not f.is_virtual
             and f.contract_declarer == contract
             and f.visibility in visibilities
         ]
@@ -198,7 +205,11 @@ class PrinterInheritanceGraph(AbstractPrinter):
 
         content = 'digraph "" {\n'
         for c in self.contracts:
-            if c.is_top_level or "mock" in c.name.lower() or c.is_library or (self.slither.exclude_interfaces and c.is_interface):
+            if (
+                "mock" in c.name.lower()
+                or c.is_library
+                or (c.is_interface and not self.slither.include_interfaces)
+            ):
                 continue
             content += self._summary(c) + "\n"
         content += "}"

slither/slither.py

@@ -197,7 +197,7 @@ class Slither(
             self.skip_data_dependency = True
 
         # Used in inheritance-graph printer
-        self.exclude_interfaces = kwargs.get("exclude_interfaces", False)
+        self.include_interfaces = kwargs.get("include_interfaces", False)
 
         self._init_parsing_and_analyses(kwargs.get("skip_analyze", False))
 

tests/e2e/printers/test_data/test_contract_names/C.sol

@@ -1,7 +1,21 @@
 import "./A.sol";
 
-contract C is A {
+interface MyInterfaceX {
+    function count() external view returns (uint256);
+
+    function increment() external;
+}
+
+contract C is A, MyInterfaceX {
     function c_main() public pure {
         a_main();
     }
+
+    function count() external view override returns (uint256){
+        return 1;
+    }
+
+    function increment() external override {
+
+    }
 }

tests/e2e/printers/test_printers.py

@@ -34,3 +34,15 @@ def test_inheritance_printer(solc_binary_path) -> None:
 
     assert counter["B -> A"] == 2
     assert counter["C -> A"] == 1
+
+    # Lets also test the include/exclude interface behavior
+    # Check that the interface is not included
+    assert "MyInterfaceX" not in content
+
+    slither.include_interfaces = True
+    output = printer.output("test_printer.dot")
+    content = output.elements[0]["name"]["content"]
+    assert "MyInterfaceX" in content
+
+    # Remove test generated files
+    Path("test_printer.dot").unlink(missing_ok=True)