From 31b80abcc6ccda2e94d8ffb3bf08582fc38a3f4c Mon Sep 17 00:00:00 2001
From: Harendra Kumar <harendra@composewell.com>
Date: Mon, 8 Aug 2022 18:04:51 +0530
Subject: [PATCH] Add use-native build flag

---
 src/Streamly/Internal/System/Process.hs |  2 --
 streamly-process.cabal                  | 19 ++++++++++++++-----
 2 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/src/Streamly/Internal/System/Process.hs b/src/Streamly/Internal/System/Process.hs
index a923d44d..cc9ac8af 100644
--- a/src/Streamly/Internal/System/Process.hs
+++ b/src/Streamly/Internal/System/Process.hs
@@ -93,8 +93,6 @@ module Streamly.Internal.System.Process
     )
 where
 
--- #define USE_NATIVE
-
 import Control.Exception (Exception(..), catch, throwIO)
 import Control.Monad (void, unless)
 import Control.Monad.Catch (MonadCatch, throwM)
diff --git a/streamly-process.cabal b/streamly-process.cabal
index e2c0c097..7c9ae4cf 100644
--- a/streamly-process.cabal
+++ b/streamly-process.cabal
@@ -48,6 +48,11 @@ flag use-gauge
   manual: True
   default: False
 
+flag use-native
+  description: Do not depend on the process package
+  manual: True
+  default: False
+
 common compile-options
   default-language: Haskell2010
   ghc-options:
@@ -70,6 +75,8 @@ common optimization-options
     -fdicts-strict
     -fspec-constr-recursive=16
     -fmax-worker-args=16
+  if flag(use-native)
+    cpp-options: -DUSE_NATIVE
 
 library
   import: compile-options, optimization-options
@@ -78,18 +85,20 @@ library
     Streamly.System.Process
     Streamly.Internal.System.Process
     Streamly.Internal.System.Command
-  if !os(windows)
+  if flag (use-native) && !os(windows)
     exposed-modules:
       Streamly.Internal.System.Process.Posix
   build-depends:
       base              >= 4.8   && < 5
     , exceptions        >= 0.8   && < 0.11
-    , process           >= 1.0   && < 1.7
     -- Uses internal APIs
     , streamly          == 0.9.0.*
-  if !os(windows)
-    build-depends:
-      unix              >= 2.5   && < 2.8
+  if !flag(use-native)
+    build-depends: process >= 1.0 && < 1.7
+  else
+     if !os(windows)
+       build-depends:
+         unix >= 2.5 && < 2.8
 
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