Fix project-local build flags being ignored.

I noticed that running ‘cabal install’ with two separate sets of dynamic /
static build flags (e.g. one with none, and one with ‘--enable-shared
--enable-executable-dynamic --disable-library-vanilla’) produced packages with
the same hash, instead of different hashes.

After debugging this issue I found that this command (with no explicit cabal
project file) was resulting in these build configuration flags being ignored,
because in ProjectPlanning.hs, the sdist was not considered a local package, so
the (non-shared) local-package-only configuration was being dropped.

This fix ensures that these command-line arguments properly make it through to
where they belong in cases like this.

Additionally, adjust the ‘style’ attribute in plan.json so that globally
installed packages are designated as global even if they are local to the
project.  (Without this adjustment to ‘style2str’, the T5782Diamond test fails,
because it looks up ‘dist-dirs’ in plan.json, where ‘dist-dirs’ is absent from
the JSON.)

Finally, take into account elabDynExe and configDynExe to provide GHC with
‘-dynamic’ appropriately rather than going about it with static linking.

cabal-install/src/Distribution/Client/Configure.hs

@@ -154,6 +154,9 @@ configure verbosity packageDBs repoCtxt comp platform progdb
         (fromFlagOrDefault
            (useDistPref defaultSetupScriptOptions)
            (configDistPref configFlags))
+        (fromFlagOrDefault
+            (setupConfigDynamic defaultSetupScriptOptions)
+            (configDynExe configFlags))
         (chooseCabalVersion
            configExFlags
            (flagToMaybe (configCabalVersion configExFlags)))
@@ -167,6 +170,7 @@ configureSetupScript :: PackageDBStack
                      -> Platform
                      -> ProgramDb
                      -> FilePath
+                     -> Bool
                      -> VersionRange
                      -> Maybe Lock
                      -> Bool
@@ -178,6 +182,7 @@ configureSetupScript packageDBs
                      platform
                      progdb
                      distPref
+                     dynExe
                      cabalVersion
                      lock
                      forceExternal
@@ -209,6 +214,7 @@ configureSetupScript packageDBs
     , useDependenciesExclusive = not defaultSetupDeps && isJust explicitSetupDeps
     , useVersionMacros         = not defaultSetupDeps && isJust explicitSetupDeps
     , isInteractive            = False
+    , setupConfigDynamic       = dynExe
     }
   where
     -- When we are compiling a legacy setup script without an explicit

cabal-install/src/Distribution/Client/Install.hs

@@ -1059,6 +1059,7 @@ performInstallations verbosity
         platform
         progdb
         distPref
+        (fromFlagOrDefault (setupConfigDynamic defaultSetupScriptOptions) $ configDynExe configFlags)
         (chooseCabalVersion configExFlags (libVersion miscOptions))
         (Just lock)
         parallelInstall

cabal-install/src/Distribution/Client/ProjectPlanOutput.hs

@@ -272,9 +272,9 @@ encodePlanAsJson distDirLayout elaboratedInstallPlan elaboratedSharedConfig =
     comp2str = prettyShow
 
     style2str :: Bool -> BuildStyle -> String
+    style2str _     BuildAndInstall  = "global"
     style2str True  _                = "local"
     style2str False BuildInplaceOnly = "inplace"
-    style2str False BuildAndInstall  = "global"
 
     jdisplay :: Pretty a => a -> J.Value
     jdisplay = J.String . prettyShow

cabal-install/src/Distribution/Client/ProjectPlanning.hs

@@ -668,6 +668,7 @@ rebuildInstallPlan verbosity
                          projectConfigAllPackages,
                          projectConfigLocalPackages,
                          projectConfigSpecificPackage,
+                         projectPackagesNamed,
                          projectConfigBuildOnly
                        }
                        (compiler, platform, progdb) pkgConfigDB
@@ -692,6 +693,7 @@ rebuildInstallPlan verbosity
                 localPackages
                 sourcePackageHashes
                 defaultInstallDirs
+                projectPackagesNamed
                 projectConfigShared
                 projectConfigAllPackages
                 projectConfigLocalPackages
@@ -1350,6 +1352,7 @@ elaborateInstallPlan
   -> [PackageSpecifier (SourcePackage (PackageLocation loc))]
   -> Map PackageId PackageSourceHash
   -> InstallDirs.InstallDirTemplates
+  -> [PackageVersionConstraint]
   -> ProjectConfigShared
   -> PackageConfig
   -> PackageConfig
@@ -1361,6 +1364,7 @@ elaborateInstallPlan verbosity platform compiler compilerprogdb pkgConfigDB
                      solverPlan localPackages
                      sourcePackageHashes
                      defaultInstallDirs
+                     extraPackages
                      sharedPackageConfig
                      allPackagesConfig
                      localPackagesConfig
@@ -2031,15 +2035,21 @@ elaborateInstallPlan verbosity platform compiler compilerprogdb pkgConfigDB
       $ map packageId
       $ SolverInstallPlan.reverseDependencyClosure
           solverPlan
-          (map PlannedId (Set.toList pkgsLocalToProject))
+          (map PlannedId (Set.toList pkgsInplaceToProject))
 
     isLocalToProject :: Package pkg => pkg -> Bool
     isLocalToProject pkg = Set.member (packageId pkg)
                                       pkgsLocalToProject
 
+    pkgsInplaceToProject :: Set PackageId
+    pkgsInplaceToProject =
+        Set.fromList (catMaybes (map shouldBeLocal localPackages))
+        --TODO: localPackages is a misnomer, it's all project packages
+        -- here is where we decide which ones will be local!
+
     pkgsLocalToProject :: Set PackageId
     pkgsLocalToProject =
-        Set.fromList (catMaybes (map shouldBeLocal localPackages))
+        Set.fromList (catMaybes (map (isInLocal extraPackages) localPackages))
         --TODO: localPackages is a misnomer, it's all project packages
         -- here is where we decide which ones will be local!
 
@@ -2108,6 +2118,28 @@ shouldBeLocal (SpecificSourcePackage pkg) = case srcpkgSource pkg of
     LocalUnpackedPackage _ -> Just (packageId pkg)
     _                      -> Nothing
 
+-- Used to determine which packages are affected by local package configuration
+-- flags like ‘--enable-shared --enable-executable-dynamic --disable-library-vanilla’.
+isInLocal :: [PackageVersionConstraint] -> PackageSpecifier (SourcePackage (PackageLocation loc)) -> Maybe PackageId
+isInLocal _              NamedPackage{}              = Nothing
+isInLocal _extraPackages (SpecificSourcePackage pkg) = case srcpkgSource pkg of
+    LocalUnpackedPackage _ -> Just (packageId pkg)
+    -- LocalTarballPackage is matched here too, because otherwise ‘sdistize’
+    -- produces for ‘localPackages’ in the ‘ProjectBaseContext’ a
+    -- LocalTarballPackage, and ‘shouldBeLocal’ will make flags like
+    -- ‘--disable-library-vanilla’ have no effect for a typical
+    -- ‘cabal install --lib --enable-shared enable-executable-dynamic --disable-library-vanilla’,
+    -- as these flags would apply to local packages, but the sdist would
+    -- erroneously not get categorized as a local package, so the flags would be
+    -- ignored and produce a package with an unchanged hash.
+    LocalTarballPackage  _ -> Just (packageId pkg)
+    -- TODO: the docs say ‘extra-packages’ is implemented in cabal project
+    -- files.  We can fix that here by checking that the version range matches.
+    --RemoteTarballPackage    _ -> _
+    --RepoTarballPackage      _ -> _
+    --RemoteSourceRepoPackage _ -> _
+    _                      -> Nothing
+
 -- | Given a 'ElaboratedPlanPackage', report if it matches a 'ComponentName'.
 matchPlanPkg :: (ComponentName -> Bool) -> ElaboratedPlanPackage -> Bool
 matchPlanPkg p = InstallPlan.foldPlanPackage (p . ipiComponentName) (matchElabPkg p)
@@ -3387,7 +3419,8 @@ setupHsScriptOptions (ReadyPackage elab@ElaboratedConfiguredPackage{..})
       useWin32CleanHack        = False,   --TODO: [required eventually]
       forceExternalSetupMethod = isParallelBuild,
       setupCacheLock           = Just cacheLock,
-      isInteractive            = False
+      isInteractive            = False,
+      setupConfigDynamic       = elabDynExe
     }
 
 

cabal-install/src/Distribution/Client/SetupWrapper.hs

@@ -71,7 +71,7 @@ import Distribution.Simple.BuildPaths
 import Distribution.Simple.Command
          ( CommandUI(..), commandShowOptions )
 import Distribution.Simple.Program.GHC
-         ( GhcMode(..), GhcOptions(..), renderGhcOptions )
+         ( GhcMode(..), GhcDynLinkMode(..), GhcOptions(..), renderGhcOptions )
 import qualified Distribution.Simple.PackageIndex as PackageIndex
 import Distribution.Simple.PackageIndex (InstalledPackageIndex)
 import qualified Distribution.InstalledPackageInfo as IPI
@@ -249,7 +249,12 @@ data SetupScriptOptions = SetupScriptOptions {
     -- | Is the task we are going to run an interactive foreground task,
     -- or an non-interactive background task? Based on this flag we
     -- decide whether or not to delegate ctrl+c to the spawned task
-    isInteractive            :: Bool
+    isInteractive            :: Bool,
+
+    -- Also track build output artifact configuration.
+
+    -- | Pass `-dynamic` to `ghc` for dynamic rather than static linking.
+    setupConfigDynamic       :: Bool
   }
 
 defaultSetupScriptOptions :: SetupScriptOptions
@@ -272,7 +277,8 @@ defaultSetupScriptOptions = SetupScriptOptions {
     useWin32CleanHack        = False,
     forceExternalSetupMethod = False,
     setupCacheLock           = Nothing,
-    isInteractive            = False
+    isInteractive            = False,
+    setupConfigDynamic       = False
   }
 
 workingDir :: SetupScriptOptions -> FilePath
@@ -840,6 +846,9 @@ getExternalSetupMethod verbosity options pkg bt = do
               -- --ghc-option=-v instead!
               ghcOptVerbosity       = Flag (min verbosity normal)
             , ghcOptMode            = Flag GhcModeMake
+            , ghcOptDynLinkMode     = case setupConfigDynamic options'' of
+                                      True  -> Flag GhcDynamicOnly
+                                      False -> Flag GhcStaticOnly
             , ghcOptInputFiles      = toNubListR [setupHs]
             , ghcOptOutputFile      = Flag setupProgFile
             , ghcOptObjDir          = Flag setupDir

cabal-install/tests/IntegrationTests2.hs

@@ -1591,7 +1591,7 @@ testProgramOptionsLocal config0 = do
                 (Just [ghcFlag])
                 (getProgArgs localPackages "q")
     assertEqual "p"
-                Nothing
+                (Just [ghcFlag])
                 (getProgArgs localPackages "p")
   where
     testdir = "regression/program-options"

changelog.d/pr-8623

@@ -0,0 +1,7 @@
+synopsis: Fix project-local flags being ignored
+packages: cabal-install
+prs: #8623
+description: {
+    Fix some cases of configuration flags being dropped, e.g. with `v2-install`
+    and `--enable-shared --enable-executable-dynamic --disable-library-vanilla`.
+}