From 7e74ec53da20c288f9a45047e67e8227d95b2a55 Mon Sep 17 00:00:00 2001
From: Robert Helgesson <robert@rycee.net>
Date: Thu, 8 Dec 2022 13:07:14 +0100
Subject: [PATCH 1/2] libwebsockets: use multiple outputs
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This considerably lowers the closure size of packages that just need
the libraries at runtime. The difference is roughly 60–70MiB.
---
 pkgs/development/libraries/libwebsockets/default.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libwebsockets/default.nix b/pkgs/development/libraries/libwebsockets/default.nix
index 0b8d8d8e5817..b2839de387a2 100644
--- a/pkgs/development/libraries/libwebsockets/default.nix
+++ b/pkgs/development/libraries/libwebsockets/default.nix
@@ -20,6 +20,8 @@ stdenv.mkDerivation rec {
     hash = "sha256-why8LAcc4XN0JdTJ1JoNWijKENL5mOHBsi9K4wpYr2c=";
   };
 
+  outputs = [ "out" "dev" ];
+
   buildInputs = [ openssl zlib libuv ];
 
   nativeBuildInputs = [ cmake ];
@@ -34,7 +36,14 @@ stdenv.mkDerivation rec {
   ++ lib.optional withExternalPoll "-DLWS_WITH_EXTERNAL_POLL=ON";
 
   postInstall = ''
-    rm -r ${placeholder "out"}/share/libwebsockets-test-server
+    # Fix path that will be incorrect on move to "dev" output.
+    substituteInPlace "$out/lib/cmake/libwebsockets/LibwebsocketsTargets-release.cmake" \
+      --replace "\''${_IMPORT_PREFIX}" "$out"
+
+    # The package builds a few test programs that are not usually necessary.
+    # Move those to the dev output.
+    moveToOutput "bin/libwebsockets-test-*" "$dev"
+    moveToOutput "share/libwebsockets-test-*" "$dev"
   '';
 
   # $out/share/libwebsockets-test-server/plugins/libprotocol_*.so refers to crtbeginS.o

From 7fb1be82f4e180da9b53fb06de4d91c43b605b0f Mon Sep 17 00:00:00 2001
From: Robert Helgesson <robert@rycee.net>
Date: Wed, 28 Dec 2022 16:34:01 +0100
Subject: [PATCH 2/2] libwebsockets: build static library only when necessary

---
 pkgs/development/libraries/libwebsockets/default.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libwebsockets/default.nix b/pkgs/development/libraries/libwebsockets/default.nix
index b2839de387a2..a535763b8c19 100644
--- a/pkgs/development/libraries/libwebsockets/default.nix
+++ b/pkgs/development/libraries/libwebsockets/default.nix
@@ -33,7 +33,13 @@ stdenv.mkDerivation rec {
     "-DDISABLE_WERROR=ON"
     "-DLWS_BUILD_HASH=no_hash"
   ] ++ lib.optional (stdenv.hostPlatform != stdenv.buildPlatform) "-DLWS_WITHOUT_TESTAPPS=ON"
-  ++ lib.optional withExternalPoll "-DLWS_WITH_EXTERNAL_POLL=ON";
+  ++ lib.optional withExternalPoll "-DLWS_WITH_EXTERNAL_POLL=ON"
+  ++ (
+    if stdenv.hostPlatform.isStatic then
+      [ "-DLWS_WITH_SHARED=OFF" ]
+    else
+      [ "-DLWS_WITH_STATIC=OFF" "-DLWS_LINK_TESTAPPS_DYNAMIC=ON" ]
+  );
 
   postInstall = ''
     # Fix path that will be incorrect on move to "dev" output.