From 8e2cb03c2cc2094b7b07d2b3e35e52b6103af1ed Mon Sep 17 00:00:00 2001
From: Green Sky <green@g-s.xyz>
Date: Sat, 17 Feb 2024 22:52:55 +0100
Subject: [PATCH] add zstd dep

---
 external/CMakeLists.txt | 19 +++++++++++++++++++
 flake.nix               |  3 +++
 2 files changed, 22 insertions(+)

diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 0748b3fd..cbcdf2c6 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -28,3 +28,22 @@ if (NOT TARGET nlohmann_json::nlohmann_json)
 	FetchContent_MakeAvailable(json)
 endif()
 
+if (NOT TARGET zstd::zstd)
+	# TODO: try find_package() first
+	# TODO: try pkg-config next (will work on most distros)
+
+	set(ZSTD_BUILD_STATIC ON)
+	set(ZSTD_BUILD_SHARED OFF)
+	set(ZSTD_BUILD_PROGRAMS OFF)
+	set(ZSTD_BUILD_CONTRIB OFF)
+	set(ZSTD_BUILD_TESTS OFF)
+	FetchContent_Declare(zstd
+		URL "https://github.com/facebook/zstd/releases/download/v1.5.5/zstd-1.5.5.tar.gz"
+		DOWNLOAD_EXTRACT_TIMESTAMP TRUE
+		SOURCE_SUBDIR build/cmake
+		EXCLUDE_FROM_ALL
+	)
+	FetchContent_MakeAvailable(zstd)
+
+	add_library(zstd::zstd ALIAS libzstd_static)
+endif()
diff --git a/flake.nix b/flake.nix
index 00ac5f76..0d09b128 100644
--- a/flake.nix
+++ b/flake.nix
@@ -58,8 +58,11 @@
         cmakeFlags = [
           "TOMATO_ASAN=1"
           "CMAKE_BUILD_TYPE=RelWithDebInfo"
+
           "-DFETCHCONTENT_SOURCE_DIR_JSON=${pkgs.nlohmann_json.src}" # we care less about version here
           # do we really care less about the version? do we need a stable abi?
+
+          "-DFETCHCONTENT_SOURCE_DIR_ZSTD=${pkgs.zstd.src}"
         ];
 
         # TODO: replace with install command