Initial investigation of missing dependencies scenario.

pysmi/codegen/pysnmp.py

@@ -12,6 +12,7 @@
 from pysmi import debug, error
 from pysmi.codegen import jfilters
 from pysmi.codegen.intermediate import IntermediateCodeGen
+from pysmi.mibinfo import MibInfo
 
 
 class PySnmpCodeGen(IntermediateCodeGen):
@@ -77,7 +78,7 @@ class PySnmpCodeGen(IntermediateCodeGen):
         "INET-ADDRESS-MIB",
     ) + IntermediateCodeGen.baseMibs
 
-    def gen_code(self, ast, symbolTable, **kwargs):
+    def gen_code(self, ast, symbolTable, **kwargs) -> "tuple[MibInfo, str]":
         mibInfo, context = IntermediateCodeGen.gen_code(
             self, ast, symbolTable, **kwargs
         )

pysmi/compiler.py

@@ -82,6 +82,8 @@ class MibCompiler:
     _borrowers: list[AbstractBorrower]
     _parsedMibs: dict[str, tuple]
 
+    failedMibs: dict[str, error.PySmiError]
+
     def __init__(self, parser, codegen: AbstractCodeGen, writer: AbstractWriter):
         """Creates an instance of *MibCompiler* class.
 
@@ -274,7 +276,7 @@ class instances (values)
                     break
                 except UnicodeDecodeError:
                     debug.logger & debug.FLAG_COMPILER and debug.logger(
-                        f"http exeception {mibname} found at {source}"
+                        f"http exception {mibname} found at {source}"
                     )
                     continue
 

pysmi/mibinfo.py

@@ -41,7 +41,7 @@ class MibInfo:
     compliance = ()
 
     #: imported MIB names
-    imported = ()
+    imported: tuple[str, ...] = ()
 
     def __init__(self, **kwargs):
         for k in kwargs:

tests/test_imports_smiv2_pysnmp.py

@@ -5,13 +5,9 @@
 # License: https://www.pysnmp.com/pysmi/license.html
 #
 import sys
+import unittest
 
-try:
-    import unittest2 as unittest
-
-except ImportError:
-    import unittest
-
+from pysmi import error
 from pysmi.parser.smi import parserFactory
 from pysmi.codegen.pysnmp import PySnmpCodeGen
 from pysmi.codegen.symtable import SymtableCodeGen
@@ -878,6 +874,50 @@ def testCompilerCycleDetection(self):
         self.assertEqual(results["Other-MIB"], "compiled", "Other-MIB was not compiled")
 
 
+class ImportMissingTestCase(unittest.TestCase):
+    """
+    Test-MIB DEFINITIONS ::= BEGIN
+    IMPORTS
+      someObject
+        FROM OTHER-MIB;
+
+    END
+    """
+
+    def setUp(self):
+        self.mibCompiler = MibCompiler(
+            SmiStarParser(), PySnmpCodeGen(), CallbackWriter(lambda m, d, c: None)
+        )
+
+        self.testMibLoaded = False
+
+        def getMibData(mibname, context):
+            if mibname in PySnmpCodeGen.baseMibs:
+                return f"{mibname} DEFINITIONS ::= BEGIN\nEND"
+
+            if mibname == "OTHER-MIB":
+                raise error.PySmiReaderFileNotFoundError(
+                    f"source MIB {mibname} not found", reader=self
+                )
+            else:
+                self.assertEqual(mibname, "TEST-MIB", f"unexpected MIB name {mibname}")
+                self.assertFalse(
+                    self.testMibLoaded, "TEST-MIB was loaded more than once"
+                )
+                self.testMibLoaded = True
+                return self.__class__.__doc__
+
+        self.mibCompiler.add_sources(CallbackReader(getMibData))
+        self.mibCompiler.add_searchers(StubSearcher(*PySnmpCodeGen.baseMibs))
+
+    def testMissingImports(self):
+        results = self.mibCompiler.compile("TEST-MIB", noDeps=False)
+        # TODO: this test case is invalid right now, as the accurate error reported should point out that OTHER-MIB is missing.
+        self.assertEqual(
+            results["Test-MIB"], "unprocessed", "Test-MIB was not marked as missing"
+        )
+
+
 suite = unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
 
 if __name__ == "__main__":