sexp: init at 0.8.6 (#240252)

This is a dependency of the [next version](https://github.com/rnpgp/rnp/releases/tag/v0.17.0)
of [rnp](a04b45f10e/pkgs/tools/security/rnp/default.nix (L17)).

(cherry picked from commit d8c6a48180)

Co-authored-by: Jeffrey Lau <jeffrey.lau@ribose.com>

pkgs/development/libraries/sexp/default.nix

@@ -0,0 +1,48 @@
+{ lib
+, stdenv
+, bzip2
+, cmake
+, fetchFromGitHub
+, gtest
+, pkg-config
+, zlib
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "sexp";
+  version = "0.8.6";
+
+  src = fetchFromGitHub {
+    owner = "rnpgp";
+    repo = "sexp";
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-NpDSoBxEM8g/SugLmT8E5+YZPDFIGHa4eXLjdzQxaiw=";
+  };
+
+  buildInputs = [ zlib bzip2 ];
+
+  cmakeFlags = [
+    "-DCMAKE_INSTALL_PREFIX=${placeholder "out"}"
+    "-DBUILD_SHARED_LIBS=on"
+    "-DWITH_SEXP_TESTS=on"
+    "-DDOWNLOAD_GTEST=off"
+    "-DWITH_SEXP_CLI=on"
+    "-DWITH_SANITIZERS=off"
+  ];
+
+  nativeBuildInputs = [ cmake gtest pkg-config ];
+
+  outputs = [ "out" "lib" "dev" ];
+
+  preConfigure = ''
+    echo "v${finalAttrs.version}" > version.txt
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/rnpgp/sexp";
+    description = "S-expressions parser and generator C++ library, fully compliant to [https://people.csail.mit.edu/rivest/Sexp.txt]";
+    license = licenses.mit;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ ribose-jeffreylau ];
+  };
+})

pkgs/top-level/all-packages.nix

@@ -11337,6 +11337,8 @@ with pkgs;
 
   sewer = callPackage ../tools/admin/sewer { };
 
+  sexp = callPackage ../development/libraries/sexp { };
+
   sfeed = callPackage ../tools/misc/sfeed { };
 
   sftpman = callPackage ../tools/filesystems/sftpman { };