add swift flag to package.yaml

package.yaml

@@ -1,7 +1,7 @@
 name: simplexmq
 version: 1.0.3
 synopsis: SimpleXMQ message broker
-description:  |
+description: |
   This package includes <./docs/Simplex-Messaging-Server.html server>,
   <./docs/Simplex-Messaging-Client.html client> and
   <./docs/Simplex-Messaging-Agent.html agent> for SMP protocols:
@@ -64,6 +64,17 @@ dependencies:
   - x509-store == 1.6.*
   - x509-validation == 1.6.*
 
+flags:
+  swift:
+    description: Enable swift JSON format
+    manual: True
+    default: False
+
+when:
+  - condition: flag(swift)
+    ghc-options:
+      - -DswiftJSON
+
 library:
   source-dirs: src
 

simplexmq.cabal

@@ -28,9 +28,9 @@ extra-source-files:
     CHANGELOG.md
 
 flag swift
-  Description: Enable swift JSON format
-  Default:     False
-  Manual:      True
+  description: Enable swift JSON format
+  manual: True
+  default: False
 
 library
   exposed-modules:
@@ -73,10 +73,6 @@ library
   hs-source-dirs:
       src
   ghc-options: -Wall -Wcompat -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns -Wunused-type-patterns
-
-  if flag(swift)
-      ghc-options: "-DswiftJSON"
-
   build-depends:
       QuickCheck ==2.14.*
     , aeson ==2.0.*
@@ -119,6 +115,8 @@ library
     , x509 ==1.7.*
     , x509-store ==1.6.*
     , x509-validation ==1.6.*
+  if flag(swift)
+    ghc-options: -DswiftJSON
   default-language: Haskell2010
 
 executable smp-agent
@@ -171,6 +169,8 @@ executable smp-agent
     , x509 ==1.7.*
     , x509-store ==1.6.*
     , x509-validation ==1.6.*
+  if flag(swift)
+    ghc-options: -DswiftJSON
   default-language: Haskell2010
 
 executable smp-server
@@ -226,6 +226,8 @@ executable smp-server
     , x509 ==1.7.*
     , x509-store ==1.6.*
     , x509-validation ==1.6.*
+  if flag(swift)
+    ghc-options: -DswiftJSON
   default-language: Haskell2010
 
 test-suite smp-server-test
@@ -294,4 +296,6 @@ test-suite smp-server-test
     , x509 ==1.7.*
     , x509-store ==1.6.*
     , x509-validation ==1.6.*
+  if flag(swift)
+    ghc-options: -DswiftJSON
   default-language: Haskell2010