Re #6379 Introduce notify-if-arch-unknown configuration option

ChangeLog.md

@@ -65,6 +65,9 @@ Other enhancements:
   `stack> build (lib + exe + test) with ghc-9.6.3`).
 * Add flag `--candidate` to Stack's `unpack` command, to allow package
   candidates to be unpacked locally.
+* Stack will notify the user if a specified architecture value is unknown to
+  Cabal (the library). In YAML configuration files, the `notify-if-arch-unknown`
+  key is introduced, to allow the notification to be muted if unwanted.
 
 Bug fixes:
 

doc/yaml_configuration.md

@@ -1218,6 +1218,15 @@ for details).
 For further information, see the
 [Nix integration](nix_integration.md#configuration) documentation.
 
+### notify-if-arch-unknown
+
+:octicons-tag-24: UNRELEASED
+
+Default: `true`
+
+If the specified machine architecture value is unknown to Cabal (the library),
+should Stack notify the user of that?
+
 ### notify-if-cabal-untested
 
 :octicons-tag-24: UNRELEASED

src/Stack/Config.hs

@@ -48,7 +48,7 @@ import           Data.Monoid.Map ( MonoidMap (..) )
 import qualified Data.Text as T
 import qualified Data.Yaml as Yaml
 import           Distribution.System
-                   ( Arch (OtherArch), OS (..), Platform (..), buildPlatform )
+                   ( Arch (..), OS (..), Platform (..), buildPlatform )
 import qualified Distribution.Text ( simpleParse )
 import           Distribution.Version ( simplifyVersionRange )
 import           GHC.Conc ( getNumProcessors )
@@ -322,14 +322,6 @@ configFromConfigMonoid
         configRequireStackVersion = simplifyVersionRange
           (getIntersectingVersionRange configMonoidRequireStackVersion)
         configCompilerCheck = fromFirst MatchMinor configMonoidCompilerCheck
-    case arch of
-      OtherArch "aarch64" -> pure ()
-      OtherArch unk ->
-        prettyWarnL
-          [ flow "Unknown value for architecture setting:"
-          , style Shell (fromString unk) <> "."
-          ]
-      _ -> pure ()
     configPlatformVariant <- liftIO $
       maybe PlatformVariantNone PlatformVariant <$> lookupEnv platformVariantEnvVar
     let configBuild = buildOptsFromMonoid configMonoidBuildOpts
@@ -427,6 +419,7 @@ configFromConfigMonoid
         configNotifyIfNixOnPath = fromFirstTrue configMonoidNotifyIfNixOnPath
         configNotifyIfGhcUntested = fromFirstTrue configMonoidNotifyIfGhcUntested
         configNotifyIfCabalUntested = fromFirstTrue configMonoidNotifyIfCabalUntested
+        configNotifyIfArchUnknown = fromFirstTrue configMonoidNotifyIfArchUnknown
         configNoRunCompile = fromFirstFalse configMonoidNoRunCompile
     configAllowDifferentUser <-
       case getFirst configMonoidAllowDifferentUser of
@@ -618,6 +611,18 @@ loadConfig inner = do
           (mconcat $ configArgs : addConfigMonoid extraConfigs)
 
   withConfig $ \config -> do
+    let Platform arch _ = configPlatform config
+    case arch of
+      OtherArch unknownArch
+        | configNotifyIfArchUnknown config ->
+            prettyWarnL
+              [ flow "Unknown value for architecture setting:"
+              , style Shell (fromString unknownArch) <> "."
+              , flow "To mute this message in future, set"
+              , style Shell (flow "notify-if-arch-unknown: false")
+              , flow "in Stack's configuration."
+              ]
+      _ -> pure ()
     unless (stackVersion `withinRange` configRequireStackVersion config)
       (throwM (BadStackVersionException (configRequireStackVersion config)))
     unless (configAllowDifferentUser config) $ do

src/Stack/Options/ConfigParser.hs

@@ -100,7 +100,7 @@ configOptsParser currentDir hide0 =
   <*> optionalFirst (strOption
         (  long "arch"
         <> metavar "ARCH"
-        <> help "System architecture, e.g. i386, x86_64."
+        <> help "System architecture, e.g. i386, x86_64, aarch64."
         <> hide
         ))
   <*> optionalFirst (ghcVariantParser (hide0 /= OuterGlobalOpts))

src/Stack/Types/Config.hs

@@ -186,6 +186,9 @@ data Config = Config
     -- ^ Notify if Stack has not been tested with the GHC version?
   , configNotifyIfCabalUntested :: !Bool
     -- ^ Notify if Stack has not been tested with the Cabal version?
+  , configNotifyIfArchUnknown :: !Bool
+    -- ^ Notify if the specified machine architecture is unknown to Cabal (the
+    -- library)?
   , configNoRunCompile   :: !Bool
     -- ^ Use --no-run and --compile options when using `stack script`
   , configStackDeveloperMode  :: !Bool

src/Stack/Types/ConfigMonoid.hs

@@ -174,6 +174,8 @@ data ConfigMonoid = ConfigMonoid
     -- ^ See 'configNotifyIfGhcUntested'
   , configMonoidNotifyIfCabalUntested  :: !FirstTrue
     -- ^ See 'configNotifyIfCabalUntested'
+  , configMonoidNotifyIfArchUnknown  :: !FirstTrue
+    -- ^ See 'configNotifyIfArchUnknown'
   , configMonoidCasaOpts :: !CasaOptsMonoid
     -- ^ Casa configuration options.
   , configMonoidCasaRepoPrefix     :: !(First CasaRepoPrefix)
@@ -350,6 +352,8 @@ parseConfigMonoidObject rootDir obj = do
     FirstTrue <$> obj ..:? configMonoidNotifyIfGhcUntestedName
   configMonoidNotifyIfCabalUntested <-
     FirstTrue <$> obj ..:? configMonoidNotifyIfCabalUntestedName
+  configMonoidNotifyIfArchUnknown <-
+    FirstTrue <$> obj ..:? configMonoidNotifyIfArchUnknownName
   configMonoidCasaOpts <-
     jsonSubWarnings (obj ..:? configMonoidCasaOptsName ..!= mempty)
   configMonoidCasaRepoPrefix <-
@@ -536,6 +540,9 @@ configMonoidNotifyIfGhcUntestedName = "notify-if-ghc-untested"
 configMonoidNotifyIfCabalUntestedName :: Text
 configMonoidNotifyIfCabalUntestedName = "notify-if-cabal-untested"
 
+configMonoidNotifyIfArchUnknownName :: Text
+configMonoidNotifyIfArchUnknownName = "notify-if-arch-unknown"
+
 configMonoidCasaOptsName :: Text
 configMonoidCasaOptsName = "casa"