build.js

#!/usr/bin/env node

/**
 * recrypt-node-binding NPM build script
 * ==================================
 *
 * This script is responsible for compiling and building the NPM release bundle for this repo. The following steps are taken:
 *
 * + Clean up any existing Rust builds by running `cargo clean`.
 * + Run `cargo update` to make sure all dependencies are available.
 * + Compile rust code into index.node file.
 * + Run unit tests to ensure the library is in good shape for publishing.
 * + Move all expected content into a `dist` directory.
 * + Generate a binary distribution in `bin-package`.
 */

const fs = require("fs");
const path = require("path");
const shell = require("shelljs");

//Fail this script if any of these commands fail
shell.set("-e");
//Ensure that our directory is set to the root of the repo
const rootDirectory = path.dirname(process.argv[1]);
shell.cd(rootDirectory);
const isPreRelease = process.argv.slice(2).indexOf("--prerelease") !== -1;

// Cleanup any previous Rust builds, update deps, and compile
shell.exec("yarn install --ignore-scripts");
shell.exec("yarn clean");
shell.exec("yarn compile");

// As long as rustc's output is consistent, this should be fine
const host = shell
    .exec("rustc -vV")
    .toString()
    .split("\n")
    .find((line) => line.startsWith("host:"))
    .split(" ")[1];
const cargoTarget = process.env.CARGO_BUILD_TARGET;
// Skip running tests with a cross compiled binary, we know they'll fail to run
if (host === cargoTarget || cargoTarget === "" || cargoTarget === undefined) {
    shell.exec("yarn test");
}
shell.mkdir("./dist");

shell.cp(["README.md", "package.json", "index.d.ts", "index.js", "LICENSE"], "./dist");

//Add a NPM install script to the package.json that we push to NPM so that when consumers pull it down it
//runs the expected node-pre-gyp step.
const npmPackageJson = require("./dist/package.json");
npmPackageJson.scripts.install = "node-pre-gyp install";
fs.writeFileSync("./dist/package.json", JSON.stringify(npmPackageJson, null, 2));

//Use a fully qualified path to pre-gyp binary for Windows support
const cwd = shell.pwd().toString();
const replacementArch = process.env.PRE_GYP_ARCH ? `--target_arch=${process.env.PRE_GYP_ARCH}` : "";
const replacementPlatform = process.env.PRE_GYP_PLATFORM ? `--target_platform=${process.env.PRE_GYP_PLATFORM}` : "";
shell.exec(`${cwd}/node_modules/@mapbox/node-pre-gyp/bin/node-pre-gyp package ${replacementArch} ${replacementPlatform}`);
var tgz = shell.exec("find ./build -name *.tar.gz");
shell.cp(tgz, "./bin-package/");
shell.echo("build.js COMPLETE");