Replay.io on NixOS

replay-hashes.json

{
  "replay": { 
     "url": "https://static.replay.io/downloads/linux-gecko-20220331-59d0a686993f-ffd8d6280276.tar.bz2",
     "sha256": "0pf1ihxkx8dr1hn8v84sb8pgyg4xwpvjlk6jlp5bkpzp5zhyskqy"
  },
  "recordreplay-lib": { 
     "url": "https://static.replay.io/downloads/linux-recordreplay-ffd8d6280276.tgz",
     "sha256": "1sif40b7zk5mxibqpncdv00yxp7kh6jl37jq12ggm36nswwr9l7g"
  }
}

replay-update.sh

#!/usr/bin/env sh

# e.g. linux-gecko-20220331-59d0a686993f-ffd8d6280276
BUILD_ID=$( #
    curl https://static.replay.io/downloads/linux-replay.tar.bz2 -o - \
    | tar xj replay/libxul.so --to-stdout \
    | strings \
    | grep linux-gecko
)
REVISION=$(echo $BUILD_ID | sed 's/^.*-//')

REPLAY_DL=https://static.replay.io/downloads/${BUILD_ID}.tar.bz2
LIB_DL=https://static.replay.io/downloads/linux-recordreplay-${REVISION}.tgz

REPLAY_HASH=$(nix-prefetch-url --unpack --type sha256 "${REPLAY_DL}")
LIB_HASH=$(nix-prefetch-url --type sha256 "${LIB_DL}")

cat >replay-hashes.json <<EOF 
{
  "replay": { 
     "url": "${REPLAY_DL}",
     "sha256": "${REPLAY_HASH}"
  },
  "recordreplay-lib": { 
     "url": "${LIB_DL}",
     "sha256": "${LIB_HASH}"
  }
}
EOF

replay.nix

{stdenv, lib, fetchurl, autoPatchelfHook, makeWrapper, libcxx, libX11, libXt, libXdamage, glib, gtk3, dbus-glib, openssl }:
let 
    pinned = lib.importJSON ./replay-hashes.json;
    recordreplay = fetchurl pinned.recordreplay-lib;
in
stdenv.mkDerivation rec { 
    name = "replay.io";
    version = "master";
    binaryName = "replay";
    src = fetchTarball pinned.replay;
    buildInputs = [
        autoPatchelfHook
        makeWrapper
        dbus-glib 
        glib
        gtk3
        libX11
        libXdamage
        libXt
        libcxx
        openssl
    ];
    postUnpack = ''
        cp ${recordreplay} source/linux-recordreplay.so
    '';
    patchPhase = ''
        patchelf --set-interpreter ${stdenv.cc.bintools.dynamicLinker} ${binaryName}
    '';
    installPhase = ''
        mkdir -p $out
        cp -r * $out
        mkdir $out/bin
        makeWrapper $out/replay \
          $out/bin/replay-io \
          --set "RECORD_REPLAY_DRIVER" "$out/linux-recordreplay.so"
    '';
}