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build(nix): use nixpkgs libdatachannel (no cmake/fetchFromGitHub)

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libdatachannel-src fetchFromGitHub + manual cmake build fails: GitHub tarball
does not include git submodules (deps/plog, libjuice, libsrtp, usrsctp) →
CMake 'source directory does not contain CMakeLists.txt'.

Switch to pkgs.libdatachannel (0.24.1): nixpkgs builds submodules + ships
lib/dev outputs. In the Nix sandbox everything is consistent (store glibc),
so the GLIBC_ABI_GNU2_TLS issue that blocks host-local use of 0.24.1 does
not apply to the Nix build. binding.gyp defaults stay on local 0.24.0 for
dev; Nix sets LDC_INCLUDE/LDC_LIB to the store paths.
This commit is contained in:
asepharyana
2026-08-11 18:45:51 +07:00
parent edec2edf82
commit 3deca91ffe
1 changed files with 11 additions and 28 deletions
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flake.nix
+11 -28
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@@ -11,15 +11,10 @@
let
pkgs = import nixpkgs { inherit system; };
# libdatachannel 0.24.0 — the version the GoLive N-API binding links
# against. nixpkgs 0.24.1 was built against a newer glibc (ABI
# GLIBC_ABI_GNU2_TLS missing on this host), so pin 0.24.0 explicitly.
libdatachannel-src = pkgs.fetchFromGitHub {
owner = "paullouisageneau";
repo = "libdatachannel";
rev = "v0.24.0";
sha256 = "1jk53qsrihg1bsc0dmr5rajkgp3hi7d98pvpr0qnpk15b7ilb6fy";
};
# libdatachannel for the GoLive N-API binding. nixpkgs 0.24.1 is built
# against this host's glibc and ships both lib + dev headers, so the
# binding links cleanly inside the Nix sandbox (no manual cmake build).
libdatachannel = pkgs.libdatachannel;
# Source filter: `path:` literals do NOT respect .gitignore by default,
# so a dirty local out/ (stale chunks from previous builds) leaks into
@@ -172,6 +167,7 @@ WRAPPER
pkgs.pkg-config
pkgs.openssl
pkgs.openssl.dev
libdatachannel.dev # rtc/rtc.hpp headers for the GoLive binding
pkgs.git # libdatachannel FetchContent clones from GitHub
pkgs.cacert
];
@@ -201,29 +197,16 @@ WRAPPER
done
echo "=== Building libdatachannel-min N-API binding ==="
# The GoLive screen-share stack uses a minimal N-API binding
# (native/libdatachannel-min) over libdatachannel 0.24.0 built from
# source. node-gyp links against the libdatachannel .so.
# (native/libdatachannel-min) over nixpkgs libdatachannel.
(
cd native/libdatachannel-min
# libdatachannel 0.24.0 fetched from GitHub (see flake inputs) —
# build with CMake, then node-gyp links against the .so.
mkdir -p build/ldc
cd build/ldc
OPENSSL_ROOT_DIR="${opensslDevEnv}" cmake -DCMAKE_BUILD_TYPE=Release \
-DNO_EXAMPLES=ON -DNO_TESTS=ON -DNO_WEBSOCKET=ON \
-DNO_MEDIA=OFF \
-DCMAKE_INSTALL_PREFIX=$PWD/install \
${libdatachannel-src} 2>&1 || true
make -j"$NIX_BUILD_CORES" 2>&1 || true
LDC_DIR=$PWD
cd ../..
# binding.gyp resolves include/lib from env (LDC_INCLUDE = source
# dir with rtc/rtc.hpp, LDC_LIB = cmake build dir with the .so,
# NAPI_INCLUDE = node-addon-api include root).
# binding.gyp resolves include/lib from env (LDC_INCLUDE = .dev
# include root, LDC_LIB = lib output dir, NAPI_INCLUDE =
# node-addon-api include root).
NAPI_INCLUDE=$(find ../../node_modules/.pnpm -maxdepth 3 \
-type d -path "*node_modules/node-addon-api" | head -1)
echo "NAPI_INCLUDE=$NAPI_INCLUDE"
LDC_INCLUDE=${libdatachannel-src} LDC_LIB=$LDC_DIR \
LDC_INCLUDE=${libdatachannel.dev} LDC_LIB=${libdatachannel.lib} \
NAPI_INCLUDE=$NAPI_INCLUDE \
npx node-gyp rebuild 2>&1 || true
ls -la build/Release/datachannel_min.node 2>/dev/null \
@@ -288,7 +271,7 @@ WRAPPER
#!${pkgs.runtimeShell}
cd $out/lib/gmw-discord-gateway
export PATH=${pkgs.ffmpeg-headless}/bin:${pkgs.yt-dlp}/bin:\$PATH
export LD_LIBRARY_PATH=$out/lib/gmw-discord-gateway/native/libdatachannel-min/build/ldc:\$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=${libdatachannel.lib}/lib:\$LD_LIBRARY_PATH
exec ${nodejs}/bin/node dist/index.js
WRAPPER
chmod +x $out/bin/gmw-discord-gateway