Create structure for Node.js node-gyp native module

nodejs/.gitignore

@@ -1,7 +1,6 @@
-/dist/*
-/native/target
-/native/index.node
-/native/artifacts.json
+/build/
+/index.node
 /native/Cargo.lock
+/native/target
 node_modules/
-package-lock.json
+/package-lock.json

nodejs/binding.c

@@ -0,0 +1,8 @@
+#include <stdlib.h>
+
+#define NAPI_VERSION 4
+#include <node_api.h>
+
+typedef struct Cfg Cfg;
+
+#include <minify_html_ffi.h>

nodejs/binding.gyp

@@ -0,0 +1,24 @@
+{
+  "targets": [
+    {
+      "target_name": "index",
+      "sources": [
+        "binding.c"
+      ],
+      "include_dirs": [
+        "native/target/release/",
+      ],
+      "actions": [
+        {
+          "action_name": "build minify-html-ffi static library",
+          "inputs": ["native/src/lib.rs"],
+          "outputs": ["native/target/release/libminify_html_ffi.a", "native/target/release/minify_html_ffi.h"],
+          "action": ["cargo", "build", "--manifest-path", "native/Cargo.toml", "--release"],
+        },
+      ],
+      "libraries": [
+        "../native/target/release/libminify_html_ffi.a",
+      ],
+    },
+  ],
+}

nodejs/native/Cargo.toml

@@ -1,20 +1,18 @@
 [package]
 publish = false
-name = "minify-html-nodejs"
+name = "minify-html-ffi"
 version = "0.2.6"
 authors = ["Wilson Lin <code@wilsonl.in>"]
 license = "MIT"
-build = "build.rs"
-exclude = ["artifacts.json", "index.node"]
 edition = "2018"
 
 [lib]
-name = "minify_html_nodejs_lib"
-crate-type = ["cdylib"]
+name = "minify_html_ffi"
+crate-type = ["staticlib"]
 
 [build-dependencies]
-neon-build = "0.4.0"
+cbindgen = "0.14"
 
 [dependencies]
+libc = "0.2"
 minify-html = { path = "../..", features = ["js-esbuild"] }
-neon = "0.4.0"

nodejs/native/build.rs

@@ -1,3 +1,13 @@
+use std::env;
+
 fn main() {
-    neon_build::setup();
+    let crate_dir = env!("CARGO_MANIFEST_DIR");
+    let profile = env::var("PROFILE").unwrap();
+
+    cbindgen::Builder::new()
+        .with_language(cbindgen::Language::C)
+        .with_crate(crate_dir)
+        .generate()
+        .expect("generate C bindings")
+        .write_to_file(format!("target/{}/minify_html_ffi.h", profile));
 }

nodejs/native/src/lib.rs

@@ -1,18 +1,54 @@
-use neon::prelude::*;
+use std::{mem, ptr, slice};
 use minify_html::{Cfg, Error, in_place};
 
-fn minify(mut cx: FunctionContext) -> JsResult<JsNumber> {
-    let mut buffer = cx.argument::<JsBuffer>(0)?;
-    let cfg_obj = cx.argument::<JsObject>(1)?;
-    let cfg = Cfg {
-        minify_js: cfg_obj.get(&mut cx, "minifyJs")?.downcast::<JsBoolean>().or_throw(&mut cx)?.value(),
-    };
-    match cx.borrow_mut(&mut buffer, |code| in_place(code.as_mut_slice::<u8>(), &cfg)) {
-        Ok(out_len) => Ok(cx.number(out_len as f64)),
-        Err(Error { error_type, position }) => cx.throw_error(format!("{} [Character {}]", error_type.message(), position)),
-    }
+#[no_mangle]
+pub extern "C" fn ffi_create_cfg(minify_js: bool) -> *mut Cfg {
+    Box::into_raw(Box::new(Cfg {
+        minify_js,
+    }))
 }
 
-register_module!(mut cx, {
-    cx.export_function("minify", minify)
-});
+#[no_mangle]
+pub extern "C" fn ffi_drop_cfg(cfg: *mut Cfg) -> () {
+    unsafe {
+        Box::from_raw(cfg);
+    };
+}
+
+#[repr(C)]
+pub struct ffi_error {
+    message: *mut u8,
+    message_len: usize,
+    position: usize,
+}
+
+#[no_mangle]
+pub extern "C" fn ffi_drop_ffi_error(ffi_error_ptr: *mut ffi_error) -> () {
+    unsafe {
+        let ffi_error = Box::from_raw(ffi_error_ptr);
+        let _ = String::from_raw_parts(ffi_error.message, ffi_error.message_len, ffi_error.message_len);
+    };
+}
+
+#[no_mangle]
+pub extern "C" fn ffi_in_place(code: *mut u8, code_len: usize, cfg: *const Cfg, out_min_len: *mut usize) -> *const ffi_error {
+    let code_slice = unsafe { slice::from_raw_parts_mut(code, code_len) };
+    match in_place(code_slice, unsafe { &*cfg }) {
+        Ok(min_len) => unsafe {
+            *out_min_len = min_len;
+            ptr::null()
+        }
+        Err(Error { error_type, position }) => {
+            let mut msg = error_type.message();
+            msg.shrink_to_fit();
+            let msg_ptr = msg.as_mut_ptr();
+            let msg_len = msg.len();
+            mem::forget(msg);
+            Box::into_raw(Box::new(ffi_error {
+                message: msg_ptr,
+                message_len: msg_len,
+                position,
+            }))
+        }
+    }
+}

nodejs/package.json

@@ -7,7 +7,7 @@
     "postinstall.js"
   ],
   "scripts": {
-    "build": "neon build --release && mv native/index.node index.node",
+    "build": "node-gyp build && mv build/Release/index.node index.node",
     "postinstall": "node postinstall.js"
   },
   "repository": {
@@ -25,7 +25,7 @@
   },
   "homepage": "https://github.com/wilsonzlin/minify-html#readme",
   "devDependencies": {
-    "neon-cli": "^0.4.0"
+    "node-gyp": "^7.0.0"
   },
   "keywords": [
     "build",