refactor cabal file to support multi home units.

project-scaffold-template/nixos2205-ghc8107-haskell.nix/.ghcid

@@ -1 +1 @@
---command="cabal new-repl {{name}}:exe:{{name}}" --test=":!cabal new-test {{name}}:test:{{name}}-test"
+--command="cabal new-repl lib:{{name}} -f ghcidlibwithtest" --test="TestMain.main" --setup=":load test/Spec.hs"

project-scaffold-template/nixos2205-ghc8107-haskell.nix/project.orig.name.cabal

@@ -1,6 +1,6 @@
-cabal-version:       2.4
+cabal-version:       3.0
 name:                {{name}}
-version:             0.0.0.0
+version:             0.1.0.0
 synopsis:            {{description}}.
 description:         {{description}}.
 homepage:            https://github.com/hughjfchen/{{name}}
@@ -9,7 +9,7 @@ license:             MIT
 license-file:        LICENSE
 author:              Hugh JF Chen
 maintainer:          Hugh JF Chen <hugh.jf.chen@gmail.com>
-copyright:           2021 Hugh JF Chen
+copyright:           2023 Hugh JF Chen
 category:            Network
 build-type:          Simple
 extra-doc-files:     README.md
@@ -20,20 +20,82 @@ source-repository head
   type:                git
   location:            https://github.com/hughjfchen/{{name}}.git
 
-common common-options
-  build-depends:       base >= 4.11.1.0 && < 4.15
-                     , relude
-                     , text
-                     , bytestring
-                     , mtl
-                     , transformers
-                     , containers
-                     , unordered-containers
+flag ghcidlibwithtest
+  description: provide test support with the lib for ghcid
+  default: False
 
-  mixins:              base hiding (Prelude)
-                     , relude (Relude as Prelude)
-                     , relude
+flag ghcidappwithtest
+  description: provide test support with the app for ghcid
+  default: False
 
+common c-base
+  build-depends: base >= 4.11.1.0 && < 4.15
+
+common c-relude
+  build-depends: relude
+  mixins:        base hiding (Prelude)
+                 , relude (Relude as Prelude)
+                 , relude
+
+common c-basic-pkgs
+  build-depends: text
+                 , bytestring
+                 , mtl
+                 , transformers
+                 , containers
+                 , unordered-containers
+                 , exceptions
+
+common c-json
+  build-depends: aeson
+               , aeson-pretty
+
+common c-io
+  build-depends: filepath
+                 , path
+                 , path-io
+
+common c-test
+  build-depends: hspec
+                 , hedgehog
+                 , hspec-hedgehog
+
+common c-bench
+  build-depends: gauge
+
+common c-app
+  build-depends: optparse-applicative ^>= 0.16.1.0
+                 , unix-compat
+                 , time
+                 , Glob
+
+common c-lens
+  build-depends: lens
+
+common c-parse
+  build-depends: parsec
+                 , megaparsec
+
+common c-xml
+  import: c-lens
+  build-depends: xml-conduit
+                 , xml-lens
+
+common c-propellor
+  build-depends: propellor
+
+common c-conf-parse
+  build-depends: language-conf
+
+common c-ghcidlibwithtest
+  if flag(ghcidlibwithtest)
+    import: c-test
+
+common c-ghcidappwithtest
+  if flag(ghcidappwithtest)
+    import: c-test
+
+common c-options
   ghc-options:         -Wall
                        -Wcompat
                        -Widentities
@@ -51,15 +113,20 @@ common common-options
   if impl(ghc >= 8.10)
     ghc-options:       -Wunused-packages
 
+common c-language
   default-language:    Haskell2010
+
+common c-extensions
   default-extensions:  ConstraintKinds
                        DeriveAnyClass
                        DeriveFunctor
+                       DeriveDataTypeable
                        DeriveGeneric
                        DerivingStrategies
                        FlexibleContexts
                        FlexibleInstances
                        GeneralizedNewtypeDeriving
+                       TemplateHaskell
                        InstanceSigs
                        KindSignatures
                        LambdaCase
@@ -74,55 +141,81 @@ common common-options
                        PatternSynonyms
 
 library
-  import:              common-options
+  import:              c-base
+                     , c-basic-pkgs
+                     , c-json
+                     , c-parse
+                     , c-conf-parse
+                     , c-ghcidlibwithtest
+                     , c-relude
+                     , c-options
+                     , c-language
+                     , c-extensions
   hs-source-dirs:      src
   exposed-modules:     Core.Types
-                     , Core.MyError
                      , Core.{{ name | toPascal }}
+                     , Core.MyError
+                     , Core.OrphanInstances
                      , Has
                      , As
                      , Error
                      , MonadStack
                      , Capability.{{ name | toPascal }}
 
 executable {{name}}
-  import:              common-options
+  import:              c-base
+                     , c-basic-pkgs
+                     , c-json
+                     , c-parse
+                     , c-io
+                     , c-propellor
+                     , c-lens
+                     , c-xml
+                     , c-app
+                     , c-ghcidappwithtest
+                     , c-relude
+                     , c-options
+                     , c-language
+                     , c-extensions
   hs-source-dirs:      app
   main-is:             Main.hs
-  other-modules:       Paths_{{ name | toSnake }}
-                     , CmdLine
+  other-modules:       Paths_{{name | toSnake }}
                      , AppM
                      , AppEnv
                      , AppError
+                     , Utils
+                     , CmdLine
                      , AppCapability.{{ name | toPascal }}
-                     , FromConfig.PostgresqlSimple
-                     , FromConfig.ResourcePool
-                     , FromConfig.{{ name | toPascal }}
   build-depends:       {{name}}
-                     , optparse-applicative
-                     , conferer
-                     , postgresql-simple
-                     , resource-pool
-                     , time
   ghc-options:         -threaded
                        -rtsopts
                        -with-rtsopts=-N
 
 test-suite {{name}}-test
-  import:              common-options
+  import:              c-base
+                     , c-parse
+                     , c-conf-parse
+                     , c-test
+                     , c-relude
+                     , c-options
+                     , c-language
+                     , c-extensions
   type:                exitcode-stdio-1.0
   hs-source-dirs:      test
   main-is:             Spec.hs
   build-depends:       {{name}}
-                     , hspec
-                     , hedgehog
-                     , hspec-hedgehog
   ghc-options:         -threaded
                        -rtsopts
                        -with-rtsopts=-N
+  other-modules:       Paths_{{name | toSnake}}
 
 benchmark {{name}}-benchmark
-  import:              common-options
+  import:              c-base
+                     , c-bench
+                     , c-relude
+                     , c-options
+                     , c-language
+                     , c-extensions
   type:                exitcode-stdio-1.0
   hs-source-dirs:      benchmark
   main-is:             Main.hs