WIP

Author: phadej

src/HaskellCI/Config/Grammar.hs

@@ -159,12 +159,12 @@ configGrammar = Config
         ^^^ metaActionHelp "PATCH" "file" ".patch files to apply to the generated Travis YAML file"
     <*> monoidalFieldAla    "github-patches"            (C.alaList' C.NoCommaFSep C.Token') (field @"cfgGitHubPatches")
         ^^^ metaActionHelp "PATCH" "file" ".patch files to apply to the generated GitHub Actions YAML file"
-    <*> booleanFieldDef "insert-version"                                                    (field @"cfgInsertVersion") defaultConfig
+    <*> booleanFieldDef    "insert-version"                                                    (field @"cfgInsertVersion") defaultConfig
         ^^^ help "Don't insert the haskell-ci version into the generated Travis YAML file"
-    <*> optionalFieldDef "error-missing-methods"                                            (field @"cfgErrorMissingMethods") defaultConfig
+    <*> optionalFieldDef   "error-missing-methods"                                            (field @"cfgErrorMissingMethods") defaultConfig
         ^^^ metahelp "PKGSCOPE" "Insert -Werror=missing-methods for package scope (none, local, all)"
-    <*> booleanFieldDef     "error-unused-packages"                                         (field @"cfgErrorUnusedPkgs") defaultConfig
-        ^^^ help "Insert -Werror=unused-packages"
+    <*> rangeField         "error-unused-packages"                                         (field @"cfgErrorUnusedPkgs") defaultConfig
+        ^^^ metahelp "RANGE" "Insert -Werror=unused-packages"
     <*> blurFieldGrammar (field @"cfgDoctest") doctestConfigGrammar defaultConfig
     <*> blurFieldGrammar (field @"cfgDocspec") docspecConfigGrammar defaultConfig
     <*> pure [] -- constraint sets

src/HaskellCI/Config/History.hs

@@ -83,6 +83,8 @@ configHistory =
     , ver 0 19 20250606 := \cfg -> cfg
         & field @"cfgDocspec" . field @"cfgDocspecUrl"  .~ "https://github.com/phadej/cabal-extras/releases/download/cabal-docspec-0.0.0.20250606/cabal-docspec-0.0.0.20250606-x86_64-linux.xz"
         & field @"cfgDocspec" . field @"cfgDocspecHash" .~ "cc20bb5c19501b42bde77556bc419c7c0a5c8d1eb65663024d8a4e4c868bef25"
+    , ver 0 19 20250708 := \cfg -> cfg
+        & field @"cfgErrorUnusedPkgs" .~ C.orLaterVersion (C.mkVersion [9,4])
     ]
   where
     ver x y z = [x, y, z]

src/HaskellCI/Config/Initial.hs

@@ -74,7 +74,7 @@ initialConfig = Config
     , cfgGitHubPatches       = []
     , cfgInsertVersion       = True
     , cfgErrorMissingMethods = PackageScopeLocal
-    , cfgErrorUnusedPkgs     = True -- TODO: False
+    , cfgErrorUnusedPkgs     = noVersion
     , cfgDoctest             = initialDoctestConfig
     , cfgDocspec             = initialDocspecConfig
     , cfgConstraintSets      = []

src/HaskellCI/Config/Type.hs

@@ -74,7 +74,7 @@ data Config = Config
     , cfgGitHubPatches       :: [FilePath]
     , cfgInsertVersion       :: !Bool
     , cfgErrorMissingMethods :: !PackageScope
-    , cfgErrorUnusedPkgs     :: !Bool
+    , cfgErrorUnusedPkgs     :: !VersionRange
     , cfgDoctest             :: !DoctestConfig
     , cfgDocspec             :: !DocspecConfig
     , cfgConstraintSets      :: [ConstraintSet]

src/HaskellCI/GitHub.hs

@@ -356,8 +356,10 @@ makeGitHub _argv config@Config {..} gitconfig prj jobs@JobVersions {..} = do
                     , "  ghc-options: -Werror=missing-methods -Werror=missing-fields"
                     ]
 
-            when cfgErrorUnusedPkgs $ for_ pkgs $ \Pkg{pkgName,pkgJobs} -> do
-                let range = Range (C.orLaterVersion (C.mkVersion [9,4])) /\ RangePoints pkgJobs
+            -- -Werror-unused-pkgs
+            for_ pkgs $ \Pkg{pkgName,pkgJobs} -> do
+                -- is introduced in 8.10.
+                let range = Range cfgErrorUnusedPkgs /\ Range (C.orLaterVersion (C.mkVersion [8,10])) /\ RangePoints pkgJobs
                 echo_if_to range "cabal.project" $ "package " ++ pkgName
                 echo_if_to range "cabal.project" $ "    ghc-options: -Werror=unused-packages"