fixes #2159

Hints and warnings are only emitted for the main package that is compiled

compiler/ast.nim

@@ -961,6 +961,9 @@ const
                   skMethod, skConverter}
 
 var ggDebug* {.deprecated.}: bool ## convenience switch for trying out things
+var
+  gMainPackageId*: int
+  gMainPackageNotes*: TNoteKinds
 
 proc isCallExpr*(n: PNode): bool =
   result = n.kind in nkCallKinds

compiler/modules.nim

@@ -156,6 +156,9 @@ proc compileModule*(fileIdx: int32, flags: TSymFlags): PSym =
     #var rd = handleSymbolFile(result)
     var rd: PRodReader
     result.flags = result.flags + flags
+    if sfMainModule in result.flags:
+      gMainPackageId = result.owner.id
+
     if gCmd in {cmdCompileToC, cmdCompileToCpp, cmdCheck, cmdIdeTools}:
       rd = handleSymbolFile(result)
       if result.id < 0:
@@ -183,6 +186,9 @@ proc importModule*(s: PSym, fileIdx: int32): PSym {.procvar.} =
   if optCaasEnabled in gGlobalOptions: addDep(s, fileIdx)
   if sfSystemModule in result.flags:
     localError(result.info, errAttemptToRedefine, result.name.s)
+  # restore the notes for outer module:
+  gNotes = if s.owner.id == gMainPackageId: gMainPackageNotes
+           else: ForeignPackageNotes
 
 proc includeModule*(s: PSym, fileIdx: int32): PNode {.procvar.} =
   result = syntaxes.parseFile(fileIdx)

compiler/msgs.nim

@@ -500,12 +500,14 @@ type
   ESuggestDone* = object of Exception
 
 const
+  ForeignPackageNotes*: TNoteKinds = {hintProcessing, warnUnknownMagic,
+    hintQuitCalled}
   NotesVerbosity*: array[0..3, TNoteKinds] = [
     {low(TNoteKind)..high(TNoteKind)} - {warnShadowIdent, warnUninit,
                                          warnProveField, warnProveIndex,
                                          warnGcUnsafe,
                                          hintSuccessX, hintPath, hintConf,
-                                         hintProcessing,
+                                         hintProcessing, hintPattern,
                                          hintDependency,
                                          hintExecuting, hintLinking,
                                          hintCodeBegin, hintCodeEnd,

compiler/sem.nim

@@ -413,6 +413,12 @@ proc myOpen(module: PSym): PPassContext =
     c.importTable.addSym magicsys.systemModule # import the "System" identifier
     importAllSymbols(c, magicsys.systemModule)
   c.topLevelScope = openScope(c)
+  # don't be verbose unless the module belongs to the main package:
+  if module.owner.id == gMainPackageId:
+    gNotes = gMainPackageNotes
+  else:
+    if gMainPackageNotes == {}: gMainPackageNotes = gNotes
+    gNotes = ForeignPackageNotes
   result = c
 
 proc myOpenCached(module: PSym, rd: PRodReader): PPassContext =