fix: ship the plugin sdk and serialport in desktop builds

src/backend/tests/electron/after-pack.test.ts

@@ -0,0 +1,56 @@
+import { createRequire } from "node:module";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+
+const require = createRequire(import.meta.url);
+const { copyPluginSdk } =
+  require("../../../../packaging/build/after-pack.cjs") as {
+    copyPluginSdk: (resourcesDir: string, sdkDir?: string) => string;
+  };
+
+let dir: string;
+afterEach(() => {
+  if (dir) fs.rmSync(dir, { recursive: true, force: true });
+});
+
+describe("afterPack plugin SDK copy", () => {
+  it("ships the SDK package.json and dist where the packaged backend resolves it", () => {
+    dir = fs.mkdtempSync(path.join(os.tmpdir(), "termix-after-pack-"));
+    const sdk = path.join(dir, "sdk");
+    fs.mkdirSync(path.join(sdk, "dist"), { recursive: true });
+    fs.mkdirSync(path.join(sdk, "src"));
+    fs.writeFileSync(
+      path.join(sdk, "package.json"),
+      '{"name":"@termix/plugin-sdk"}',
+    );
+    fs.writeFileSync(path.join(sdk, "dist", "settings.js"), "export {};");
+    fs.writeFileSync(path.join(sdk, "src", "settings.ts"), "");
+    const resources = path.join(dir, "resources");
+
+    const target = copyPluginSdk(resources, sdk);
+
+    expect(target).toBe(
+      path.join(
+        resources,
+        "app.asar.unpacked",
+        "node_modules",
+        "@termix",
+        "plugin-sdk",
+      ),
+    );
+    expect(fs.readdirSync(target).sort()).toEqual(["dist", "package.json"]);
+    expect(fs.existsSync(path.join(target, "dist", "settings.js"))).toBe(true);
+  });
+
+  it("stops the build when the SDK was never built", () => {
+    dir = fs.mkdtempSync(path.join(os.tmpdir(), "termix-after-pack-"));
+    const sdk = path.join(dir, "sdk");
+    fs.mkdirSync(sdk);
+    fs.writeFileSync(path.join(sdk, "package.json"), "{}");
+    expect(() => copyPluginSdk(path.join(dir, "resources"), sdk)).toThrow(
+      "npm run build:sdk",
+    );
+  });
+});