fail on missing map assets

(but not (yet?) on missing maps/entrypoints)

1 files changed, 8 insertions, 3 deletions

diff --git a/lib/WriteRepo.hs b/lib/WriteRepo.hs
index c0bf31b..1ed3a84 100644
--- a/lib/WriteRepo.hs
+++ b/lib/WriteRepo.hs
@@ -16,15 +16,18 @@ import           Data.Set               (Set)
 import qualified Data.Set               as S
 import           Paths                  (normalise)
 import           System.Directory.Extra (copyFile, createDirectoryIfMissing)
+import           System.Exit            (ExitCode (..))
 import           System.FilePath        (takeDirectory)
 import qualified System.FilePath        as FP
 import           System.FilePath.Posix  ((</>))
 import           Types                  (Dep (Local))
 
 
-writeAdjustedRepository :: FilePath -> FilePath -> DirResult -> IO ()
+writeAdjustedRepository :: FilePath -> FilePath -> DirResult -> IO ExitCode
 writeAdjustedRepository inPath outPath result
-  | resultIsFatal result = pure ()
+  | resultIsFatal result = do
+      putStrLn "FATAL: Repository has missing assets; cannot write to outPath"
+      pure (ExitFailure 1)
   | otherwise = do
       createDirectoryIfMissing True outPath
 
@@ -41,7 +44,7 @@ writeAdjustedRepository inPath outPath result
                    let mapdir = takeDirectory mappath in
                    mapMaybe (\case
                      Local path -> Just . normalise mapdir $ path
-                     _ -> Nothing)
+                     _          -> Nothing)
                    $ mapresultDepends mapresult)
             . toList $ dirresultMaps result
 
@@ -53,3 +56,5 @@ writeAdjustedRepository inPath outPath result
         in do
           putStrLn $ "copying " <> assetPath <> " → " <> newPath
           copyFile assetPath newPath
+
+      pure ExitSuccess