Log missing deps on update.hs without Debug.Trace

pkgs/intel-oneapi/deb/update.hs

@@ -3,7 +3,8 @@
 
 module Main (main) where
 
-import Control.Arrow (second, (&&&))
+import Control.Arrow (first, second, (&&&))
+import Control.Monad.Writer
 
 import qualified Data.Map.Lazy as M
 import qualified Data.Map.Strict as MS
@@ -11,13 +12,13 @@ import qualified Data.Text as T
 import qualified Data.Text.IO as TIO
 
 import Data.Char (isAlpha)
+import Data.Functor (($>))
 import Data.List (find, nub, sortOn)
 import Data.Map.Lazy (Map)
-import Data.Maybe (maybeToList)
+import Data.Maybe (catMaybes, maybeToList)
 import Data.Ord (Down (Down))
 import Data.Text.Read (decimal)
 
-import Debug.Trace (trace)
 import System.Environment (getArgs)
 import System.Exit (exitFailure)
 import System.IO (stderr)
@@ -164,28 +165,22 @@ compareVersions (Just (kind, want)) got
 findMatching :: Data -> Dependency -> Maybe Package
 findMatching pkgList (Dependency n v) = pkgList M.!? n >>= find (compareVersions v . version)
 
-findMatchingTraced :: Data -> Dependency -> [Package]
-findMatchingTraced l d@(Dependency n v) = case findMatching l d of
-    Nothing ->
-        trace
-            ( unwords $
-                ["[WARN]: dependency:", T.unpack n]
-                    ++ (case v of Nothing -> []; Just v' -> [show v'])
-                    ++ ["not found"]
-            )
-            []
-    Just a -> [a]
+findMatchingTraced :: Data -> Dependency -> Writer [Dependency] (Maybe Package)
+findMatchingTraced l d = case findMatching l d of
+    Nothing -> tell [d] $> Nothing
+    Just a -> pure $ Just a
 
-solveDeps :: Data -> Package -> [Package]
-solveDeps d p = removeDupes $ go [] [p]
+solveDeps :: Data -> Package -> ([Package], [Dependency])
+solveDeps d p = first removeDupes $ runWriter $ go [] [p]
   where
-    go done todo
-        | null todo = done'
-        | otherwise = go done' todo'
-      where
-        done' = filter (not . isBlacklisted) . nub $ done ++ (filter (not . isMetaPackage) todo)
-        todo' = todo >>= depends >>= findMatchingTraced d
-        isMetaPackage = ((== 0) . size) -- Meta Packages are only used to pull dependencies
+    go :: [Package] -> [Package] -> Writer [Dependency] [Package]
+    go done [] = pure done
+    go done todo = do
+        let done' = filter (not . isBlacklisted) . nub $ done ++ (filter (not . isMetaPackage) todo)
+        todo' <- catMaybes <$> mapM (findMatchingTraced d) (todo >>= depends)
+        go done' todo'
+
+    isMetaPackage = ((== 0) . size) -- Meta Packages are only used to pull dependencies
     removeDupes :: [Package] -> [Package]
     removeDupes = fmap snd . MS.toList . MS.fromListWith getLatest . fmap (cleanName . name &&& id)
 
@@ -222,19 +217,20 @@ isBlacklisted = (`elem` blacklist) . cleanName . name
         , "intel-oneapi-vtune-eclipse-plugin-vtune"
         ]
 
-application :: [String] -> Str -> Err [Kit]
+application :: [String] -> Str -> Err ([Dependency], [Kit])
 application args contents = do
     v <- mapM (parseVersion . T.pack) $ case args of
         [] -> ["2025"]
         _ -> args
 
     d <- parse contents
-    mapM (processKit d) v
+    first concat . unzip <$> mapM (processKit d) v
 
-processKit :: Data -> Version -> Err Kit
+processKit :: Data -> Version -> Err ([Dependency], Kit)
 processKit d v = do
     kit <- findHpckit "intel-hpckit"
-    return $ Kit v (version kit) (solveDeps d kit)
+    let (deps, missing) = solveDeps d kit
+    return $ (missing, Kit v (version kit) deps)
   where
     findHpckit pName =
         maybeToEither (T.unwords ["package not found:", pName, "=", showVer v]) $
@@ -252,7 +248,9 @@ main :: IO ()
 main =
     application <$> getArgs <*> TIO.getContents >>= \case
         Left err -> hPrintf stderr "[ERROR]: %s\n" err *> exitFailure
-        Right l -> mapM_ (TIO.putStrLn) $ l >>= formatKit
+        Right (missing, kits) -> do
+            mapM_ (hPrintf stderr "[WARN] missing dependency: %s\n" . show) $ nub missing
+            mapM_ (TIO.putStrLn) $ kits >>= formatKit
   where
     formatKit (Kit majorVer fullVer pkgs) =
         T.pack