Node.js: remove the build-from-source install fallback

The slint-ui package had an npm install lifecycle script
(build-on-demand.mjs) that built the native module from source when no
prebuilt binary loaded. pnpm >= 10 ignores dependency build scripts and
newer versions fail the installation over them (ERR_PNPM_IGNORED_BUILDS),
even though the prebuilt binary was installed just fine via
optionalDependencies and resolved at require-time.

Remove the fallback: drop the install script and its helper, and move
@napi-rs/cli to devDependencies - it was a runtime dependency only so
the fallback's build could find the napi binary in a consumer's
node_modules.

The registry e2e test asserts that pnpm installs slint-ui without
ignored build scripts.

Author: tronical

CHANGELOG.md

@@ -86,6 +86,8 @@ All notable changes to this project are documented in this file.
  - exposed StyledText markdown parsing API.
  - Added `ArrayModel.splice` to remove and/or insert values at a given index, following the semantics of `Array.prototype.splice`.
  - Added public API to create `keys`
+ - `npm install slint-ui` no longer falls back to building from source when no pre-built binary matches the
+   platform; the install script that did this made pnpm >= 10 fail the installation.
 
 ### Python
 

api/node/README.md

@@ -30,11 +30,14 @@ Slint is available via NPM, so you can install by running the following command:
 npm install slint-ui
 ```
 
-### Dependencies
+This requires **[Node.js](https://nodejs.org/download/release/)** (v20 or newer). Pre-built binaries are
+included for Linux (x86-64 and ARM64, glibc), macOS (ARM64), and Windows (x86-64 and ARM64).
 
-You need to install the following components:
+### Building from Source
+
+On platforms without pre-built binaries, build Slint-node from a checkout of this repository by running
+`pnpm install && pnpm build` in `api/node`. You need to install the following components:
 
-  * **[Node.js](https://nodejs.org/download/release/)** (v20 or newer)
   * **[pnpm](https://www.pnpm.io/)**
   * **[Rust compiler](https://www.rust-lang.org/tools/install)**
 

api/node/__test__/registry/e2e.test.mts

@@ -277,7 +277,15 @@ async function binaryInstalled(dir: string): Promise<boolean> {
 for (const pm of ["npm", "pnpm"] as const) {
     test(`${pm}: installing slint-ui pulls in the binary and loads`, async () => {
         const dir = await consumerProject(`${pm}-prod`);
-        await install(pm, dir, [`slint-ui@${VERSION}`]);
+        const { stdout, stderr } = await install(pm, dir, [
+            `slint-ui@${VERSION}`,
+        ]);
+        // pnpm >= 10 ignores dependency build scripts and (in newer versions)
+        // fails the install over them; slint-ui must not have any.
+        assert.ok(
+            !`${stdout}${stderr}`.includes("Ignored build scripts"),
+            "the install must not trip over ignored build scripts",
+        );
         // The matching platform binary package is installed automatically…
         assert.ok(
             await binaryInstalled(dir),

api/node/build-on-demand.mjs

@@ -30,9 +30,13 @@ To use Slint with Deno, ensure the following programs are installed:
 
 ### Building from Source
 
-Slint-node comes with pre-built binaries for macOS, Linux, and Windows. If you'd like to use Slint-node on a system
-without pre-built binaries, you need to additional software:
+Slint-node comes with pre-built binaries for Linux (x86-64 and ARM64, glibc), macOS (ARM64), and
+Windows (x86-64 and ARM64). On other systems, installing the `slint-ui` package succeeds, but loading it
+fails because no matching binary is found. `npm install` does not build Slint-node from source automatically;
+instead, build it yourself from a checkout of the [Slint repository](https://github.com/slint-ui/slint)
+(run `pnpm install && pnpm build` in `api/node`). This requires:
 
+  * **[pnpm](https://www.pnpm.io/)**
   * **[Rust compiler](https://www.rust-lang.org/tools/install)**
   * Depending on your operating system, you may need additional components. For a list of required system libraries,
     see <https://github.com/slint-ui/slint/blob/master/docs/building.md#prerequisites>.

api/node/cover.md

@@ -21,6 +21,7 @@
   "description": "Slint is a declarative GUI toolkit to build native user interfaces for desktop and embedded applications.",
   "devDependencies": {
     "@biomejs/biome": "catalog:",
+    "@napi-rs/cli": "3.7.0",
     "@types/capture-console": "1.0.5",
     "@types/node": "catalog:",
     "capture-console": "1.0.2",
@@ -40,7 +41,6 @@
     "build:minimal": "napi build --platform --js rust-module.cjs --dts rust-module.d.cts -c binaries.json --no-default-features",
     "build:debug": "napi build --platform --js rust-module-dev.cjs --dts rust-module.d.cts -c binaries-dev.json --features system-testing,mcp && pnpm compile",
     "build:testing": "napi build --platform --js rust-module.cjs --dts rust-module.d.cts -c binaries.json --features testing && pnpm compile",
-    "install": "node build-on-demand.mjs",
     "docs": "pnpm build && pnpm -C ../../docs/nodejs run build",
     "docs:dev": "pnpm build && pnpm -C ../../docs/nodejs run dev",
     "docs:debug": "pnpm build:debug && pnpm -C ../../docs/nodejs run build",
@@ -50,8 +50,5 @@
     "lint": "biome lint",
     "lint:fix": "biome lint --fix",
     "test": "vitest run"
-  },
-  "dependencies": {
-    "@napi-rs/cli": "3.7.0"
   }
 }