cmake-ts

A CMake-based build system for native NodeJS and Electron addons.

This project is loosely inspired by cmake-js but attempts to fix several design flaws.

It is intended to prebuild addons for different versions of NodeJS and Electron and ship a binary version.

Example

See zeromq.js for an real-world example of how to use this module.

Getting Started

Create your CMakeLists.txt file based on the example and run the following command to build your project.

``bash
cmake-ts build
`

cmake-ts can build the projects with built-in configurations that are selected depending on the arguments and the environment. This includes cross-compilation for different architectures, including Windows arm64, Linux arm64, etc.

`bash
cmake-ts build --config debug
`

You can cross-compile by specifying the built-in cross configs:

`bash
cmake-ts build --config cross-win32-arm64-release
`

Or by specifying the npm_config_target_os and npm_config_target_arch environment variables:

`bash
npm_config_target_os=linux npm_config_target_arch=arm64 cmake-ts build
`

$3

build command:

`sh
Usage: cmake-ts build [options]

Build the project

Options:
--config, --configs
Named config(s) to build, which could be from default configs or the ones defined in the config file (package.json)

If no config is provided, it will build for the current runtime on the current system with the Release build type

The default configs are combinations of , , , and .

- : the runtime to use

e.g.: node, electron, iojs

- : the cmake build type (optimization level)

e.g.: debug, release, relwithdebinfo, or minsizerel

- : the target platform

e.g.: win32, linux, darwin, aix, android, freebsd, haiku, openbsd, sunos, cygwin, netbsd

- : the target architecture

e.g.: x64, arm64, ia32, arm, loong64, mips, mipsel, ppc, ppc64, riscv64, s390, s390x

Any combination of , , , and is valid. Some examples:

- release
- debug
- relwithdebinfo
- node-release
- node-debug
- electron-release
- electron-debug
- win32-x64
- win32-x64-debug
- linux-x64-debug
- linux-x64-node-debug
- linux-x64-electron-release
- darwin-x64-node-release
- darwin-arm64-node-release
- darwin-arm64-electron-relwithdebinfo

To explicitly indicate cross-compilation, prefix the config name with cross-:

- cross-win32-ia32-node-release
- cross-linux-arm64-node-release
- cross-darwin-x64-electron-relwithdebinfo

You can also define your own configs in the config file (package.json).

- : the name of the config

e.g.: my-config

The configs can also be in format of named-, which builds the configs that match the property.

- named-os: build all the configs in the config file that have the same OS
- named-os-dev: build all the configs in the config file that have the same OS and dev is true
- named-all: build all the configs in the config file


The configs can be combined with , or multiple --configs flags. They will be merged together.
(default: [])
-h, --help display help for command
`

Runtime Addon Loader

The runtime addon loader allows you to load the addon for the current runtime during runtime.

In ES modules:

`ts
import { loadAddon } from 'cmake-ts/build/loader.mjs';
import path from 'path';
import { fileURLToPath } from 'url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));

const addon = loadAddon(path.resolve(__dirname, '..', 'build'));
`

or in CommonJS:

`js
const { loadAddon } = require('cmake-ts/build/loader.js');

const addon = loadAddon(path.resolve(__dirname, '..', 'build'));
`

You can pass the types of the addon to the loader to get type safety:

`ts
type MyAddon = {
myFunction: (name: string) => void;
};

const addon = loadAddon(path.resolve(__dirname, '..', 'build'));
`

Configuration File

Configuration is done entirely via package.json. You can specify multiple build configurations under the cmake-ts key:

`js
"cmake-ts": {
"nodeAPI": "node-addon-api" // Specify the node API package such as node-addon-api, nan, or the path to a directory that has the nodeAPI header. Default is node-addon-api, a warning is emitted if nan is used
"configurations": [
{
"name": "win-x64", // name for named-configs mode
"os": "win32", // win32, linux and darwin are supported
"arch": "x64", // x64, x86 should work
"runtime": "electron", // node or electron
"runtimeVersion": "4.0.1", // Version of the runtime which it is built
"toolchainFile": "/windows.cmake", // CMake Toolchain file to use for crosscompiling
"CMakeOptions": [ //Same syntax as for the globalCMakeOptions
{
"name": "MY_CMAKE_OPTION",
"value": "my_value",
}
],
"addonSubdirectory": "avx2-generic" // if you build addons for multiple architectures in high performance scenarios, you can put the addon inside another subdirectory
}, // more build configurations...
{
"dev": true, // whether this configuration is eligible to be used in a dev test build
"os": "linux", // win32, linux and darwin are supported
"arch": "x64", // x64, x86 should work
"runtime": "node", // node or electron
"runtimeVersion": "10.3.0", // Version of the runtime which it is built
} // more build configurations ...
],
"targetDirectory": "build", // where to build your project
"buildType": "Release", // Debug or Release build, most likely set it to Release
"projectName": "addon" // The name of your CMake project.
"globalCMakeOptions": [{ // this might be omitted of no further options should be passed to CMake
"name": "CMAKE_CXX_FLAGS",
"value": "-Og"
}, {
"name": "CMAKE_CXX_FLAGS",
"value": "-I$ROOT$/include", // $ROOT$ will be replaced by the package.json directory
}, {
"name": "CMAKE_EXPORT_COMPILE_COMMANDS",
"value": "1"
}]
}
`

Workflow

While it is desirable to perform a full build (all configurations) within a CI environment, long build times hinder local package development. Therefore cmake-ts knows multiple build modes:

- TODO nativeonly -> Builds the native code only for the runtime cmake-ts is currently running on, ignoring all previously specified configurations. This is useful if you'd like to run some unit tests against the compiled code. When running cmake-ts nativeonly, cmake-ts will determine the runtime, ABI, and platform from the environment, and build only the configuration required to run on this platform.
- _Example using the configuration above_
- You run cmake-ts nativeonly on NodeJS 11.7 on MacOS, cmake-ts will ignore all specified configurations above and build the native addon for NodeJS 11.7 on MacOS
- TODO osonly -> Builds the native code for all configurations which match the current operating system. This is useful for those developing for example an electron addon and want to test their code in electron. In such a case, you would specify electron and NodeJS runtimes for several platforms in your configuration and you can use cmake-ts osonly to build a local package you can install in your application.
- _Example using the configuration above_
- You run cmake-ts osonly on NodeJS 11.7 on Linux, cmake-ts will ignore all configurations above where os != linux and build the native addon for all remaining configurations, in this case it will build for NodeJS 10.3 on Linux.
- TODO HINT: For both osonly and nativeonly, the specified CMake Toolchain files are ignored since I assume you got your toolchain set up correctly for your own operating system.
- None / Omitted: Builds all configs
- dev-os-only builds the first config that has dev == true and os matches the current OS
- named-configs arg1 arg2 ... builds all configs for which name` is one of the args

Cross Compilation

This module supports cross-compilation from Linux to macOS and Windows, given a correct toolchain setup. There is a docker container that has a cross-toolchain based on CLang 7 setup for Windows and macOS which might be used in a CI.

Docker Image