From b17f3a3832a7bb53cb27643d75011cb56532e7a0 Mon Sep 17 00:00:00 2001
From: Rory& <root@rory.gay>
Date: Fri, 13 Mar 2026 02:00:13 +0100
Subject: [PATCH] nix: cache builds

---
 default.nix | 124 ++++++++++++++++++++++++++++++++--------------------
 1 file changed, 76 insertions(+), 48 deletions(-)

diff --git a/default.nix b/default.nix
index ee058e59c..940b89051 100644
--- a/default.nix
+++ b/default.nix
@@ -22,51 +22,49 @@ let
       )
     );
   };
-in
-pkgs.stdenv.mkDerivation {
-  pname = "spacebar-server-ts";
-  nodejs = pkgs.nodejs_24;
-  version = "1.0.0-" + rVersion;
 
-  meta = with lib; {
-    description = "Spacebar server, a FOSS reimplementation of the Discord backend.";
-    homepage = "https://github.com/spacebarchat/server";
-    license = licenses.agpl3Plus;
-    platforms = platforms.all;
-    mainProgram = "start-bundle";
-    maintainers = with maintainers; [ RorySys ];
-  };
+  revsFile = pkgs.writeText "spacebar-server-rev.json" (
+    builtins.toJSON {
+      rev = self.sourceInfo.rev or self.sourceInfo.dirtyRev;
+      shortRev = self.sourceInfo.shortRev or self.sourceInfo.dirtyShortRev;
+      lastModified = self.sourceInfo.lastModified;
+    }
+  );
 
-  src = filteredSrc;
-  dontStrip = true;
+  srcHash = builtins.substring 11 32 (toString filteredSrc);
+  unwrapped = pkgs.stdenv.mkDerivation {
+    pname = "spacebar-server-ts-unwrapped";
+    nodejs = pkgs.nodejs_24;
+    version = "1.0.0-" + srcHash;
 
-  nativeBuildInputs = with pkgs; [
-    nodejs
-    makeWrapper
-    (pkgs.python3.withPackages (ps: with ps; [ setuptools ]))
-  ];
+    meta = with lib; {
+      description = "Spacebar server, a FOSS reimplementation of the Discord backend.";
+      homepage = "https://github.com/spacebarchat/server";
+      license = licenses.agpl3Plus;
+      platforms = platforms.all;
+      mainProgram = "start-bundle";
+      maintainers = with maintainers; [ RorySys ];
+    };
 
-  configurePhase = ''
-    cp -r --no-preserve=ownership,timestamps ${pkgs.callPackage ./node-modules.nix { }} node_modules
-    chown $USER:$GROUP node_modules -R
-    chmod +w node_modules -R
-  '';
+    src = filteredSrc;
+    dontStrip = true;
 
-  buildPhase = ''
-    npm run build:tsgo
-  '';
+    nativeBuildInputs = with pkgs; [
+      nodejs
+      (pkgs.python3.withPackages (ps: with ps; [ setuptools ]))
+    ];
 
-  installPhase =
-    let
-      revsFile = pkgs.writeText "spacebar-server-rev.json" (
-        builtins.toJSON {
-          rev = self.sourceInfo.rev or self.sourceInfo.dirtyRev;
-          shortRev = self.sourceInfo.shortRev or self.sourceInfo.dirtyShortRev;
-          lastModified = self.sourceInfo.lastModified;
-        }
-      );
-    in
-    ''
+    configurePhase = ''
+      cp -r --no-preserve=ownership,timestamps ${pkgs.callPackage ./node-modules.nix { }} node_modules
+      chown $USER:$GROUP node_modules -R
+      chmod +w node_modules -R
+    '';
+
+    buildPhase = ''
+      npm run build:tsgo
+    '';
+
+    installPhase = ''
       runHook preInstall
       # set -x
 
@@ -80,19 +78,49 @@ pkgs.stdenv.mkDerivation {
       echo "Installing package into $out"
       mkdir -p $out
       cp -r assets dist node_modules package.json $out/
-      cp ${revsFile} $out/.rev
-
-      # Create wrappers for start scripts
-      echo "Creating wrappers for start scripts"
-      for i in dist/**/start.js
-      do
-        makeWrapper ${pkgs.nodejs_24}/bin/node $out/bin/start-`dirname ''${i/dist\//}` --prefix NODE_PATH : $out/node_modules --add-flags --enable-source-maps --add-flags $out/$i
-      done
-      makeWrapper ${pkgs.nodejs_24}/bin/node $out/bin/apply-migrations --prefix NODE_PATH : $out/node_modules --add-flags --enable-source-maps --add-flags $out/dist/apply-migrations.js
 
       # set +x
       runHook postInstall
     '';
 
+    passthru.tests = pkgs.testers.runNixOSTest (import ./nix/tests/test-bundle-starts.nix self);
+  };
+in
+pkgs.stdenv.mkDerivation {
+  pname = "spacebar-server-ts";
+  nodejs = unwrapped.nodejs;
+  version = "1.0.0-" + rVersion;
+  meta = unwrapped.meta;
+
+  nativeBuildInputs = with pkgs; [
+    makeWrapper
+  ];
+
+  # this isnt a real builder, we dont need these at all
+  dontUnpack = true;
+  dontBuild = true;
+  dontPatch = true;
+  dontConfigure = true;
+  dontStrip = true;
+  dontFixup = true;
+
+  installPhase = ''
+    # Copy outputs
+    echo "Installing package into $out"
+    mkdir -p $out
+    cp -r --no-preserve=ownership,timestamps ${unwrapped}/. $out/
+
+    # add version info
+    cp ${revsFile} $out/.rev
+
+    # Create wrappers for start scripts
+    echo "Creating wrappers for start scripts"
+    for i in dist/**/start.js
+    do
+      makeWrapper ${pkgs.nodejs_24}/bin/node $out/bin/start-`dirname ''${i/dist\//}` --prefix NODE_PATH : $out/node_modules --add-flags --enable-source-maps --add-flags $out/$i
+    done
+    makeWrapper ${pkgs.nodejs_24}/bin/node $out/bin/apply-migrations --prefix NODE_PATH : $out/node_modules --add-flags --enable-source-maps --add-flags $out/dist/apply-migrations.js
+  '';
+
   passthru.tests = pkgs.testers.runNixOSTest (import ./nix/tests/test-bundle-starts.nix self);
 }