Add overseer host package for UI support

overlays/overseer.nix

@@ -1,9 +1,9 @@
 {inputs}: final: prev: let
 	manifest = (prev.lib.importTOML "${inputs.overseer}/overseer/Cargo.toml").package;
-in {
-	overseer =
+
+	overseer-cli =
 		prev.rustPlatform.buildRustPackage {
-			pname = manifest.name;
+			pname = "overseer-cli";
 			version = manifest.version;
 
 			cargoLock.lockFile = "${inputs.overseer}/overseer/Cargo.lock";
@@ -22,4 +22,80 @@ in {
 
 			doCheck = false;
 		};
+
+	overseer-host =
+		prev.buildNpmPackage {
+			pname = "overseer-host";
+			version = manifest.version;
+
+			src = "${inputs.overseer}/host";
+
+			npmDepsHash = "sha256-WIjx6N8vnH3C6Kxn4tiryi3bM0xnov5ok2k9XrndIS0=";
+
+			buildPhase = ''
+				runHook preBuild
+				npm run build
+				runHook postBuild
+			'';
+
+			installPhase = ''
+				runHook preInstall
+				mkdir -p $out
+				cp -r dist $out/
+				cp -r node_modules $out/
+				cp package.json $out/
+				runHook postInstall
+			'';
+		};
+
+	overseer-ui =
+		prev.buildNpmPackage {
+			pname = "overseer-ui";
+			version = manifest.version;
+
+			src = "${inputs.overseer}/ui";
+
+			npmDepsHash = "sha256-krOsSd8OAPsdCOCf1bcz9c/Myj6jpHOkaD/l+R7PQpY=";
+
+			buildPhase = ''
+				runHook preBuild
+				npm run build
+				runHook postBuild
+			'';
+
+			installPhase = ''
+				runHook preInstall
+				mkdir -p $out
+				cp -r dist $out/
+				runHook postInstall
+			'';
+		};
+in {
+	# The CLI looks for host/dist/index.js and ui/dist relative to the binary
+	# Using paths like: exe_dir.join("../@dmmulroy/overseer/host/dist/index.js")
+	# So we create: bin/os and @dmmulroy/overseer/host/dist/index.js
+	overseer =
+		prev.runCommand "overseer-${manifest.version}" {
+			nativeBuildInputs = [prev.makeWrapper];
+		} ''
+			# Create npm-like structure that the CLI expects
+			mkdir -p $out/bin
+			mkdir -p $out/@dmmulroy/overseer/host
+			mkdir -p $out/@dmmulroy/overseer/ui
+
+			# Copy host files
+			cp -r ${overseer-host}/dist $out/@dmmulroy/overseer/host/
+			cp -r ${overseer-host}/node_modules $out/@dmmulroy/overseer/host/
+			cp ${overseer-host}/package.json $out/@dmmulroy/overseer/host/
+
+			# Copy UI files
+			cp -r ${overseer-ui}/dist $out/@dmmulroy/overseer/ui/
+
+			# Copy CLI binary
+			cp ${overseer-cli}/bin/os $out/bin/os
+
+			# Make wrapper that ensures node is available
+			wrapProgram $out/bin/os \
+				--prefix PATH : ${prev.nodejs}/bin
+		'';
 }