nw/src/postinstall.js

An installer for NW.js

import fs from "node:fs";
import process from "node:process";
import path from "node:path";
import url from "node:url";

import get from "@nwutils/getter";
import semver from "semver";

import util from "./util.js";

await postinstall()
    .catch((error) => {
        if (error.code === "EPERM") {
            console.error("Unable to create symlink since user did not run as Administrator.");
        } else {
            console.error(error)
        }
    });

async function postinstall() {
    const __dirname = path.dirname(url.fileURLToPath(import.meta.url));
    /**
     * @type {fs.PathLike}
     */
    const nodeManifestPath = path.resolve(__dirname, "..", "package.json");
    /**
     * @type {object}
     */
    const nodeManifest = JSON.parse(await fs.promises.readFile(nodeManifestPath));
    const parsedVersion = semver.parse(nodeManifest.version);
    let version = [
        parsedVersion.major,
        parsedVersion.minor,
        parsedVersion.patch
    ].join(".");

    let flavor = process.env.npm_config_nwjs_build_type || process.env.NWJS_BUILD_TYPE || "normal";

    /**
     * If `parsedVersion` is `null`, then prerelease is `"null"`.
     * If `parsedVersion?.prerelease` is `[]`, then prerelease is `"undefined"`.
     * If `parsedVersion?.prerelease[0]` is `"N-sdk"` where N represents a build number, then prerelease is `"N-sdk"`.
     *
     * @type {"null" | "undefined" | "N-sdk" | ""}
     */
    const prerelease = String(parsedVersion?.prerelease[0]);
    /* Check build flavor and slice that off the `version`. */
    if (prerelease.endsWith("sdk")) {
        flavor = "sdk";
    }

    const platform = util.PLATFORM_KV[process.env.npm_config_nwjs_platform || process.env.NWJS_PLATFORM || process.platform];
    const arch = util.ARCH_KV[process.env.npm_config_nwjs_process_arch || process.env.NWJS_ARCH || process.arch];
    const downloadUrl = process.env.npm_config_nwjs_urlbase || process.env.NWJS_URLBASE || "https://dl.nwjs.io";
    const manifestUrl = process.env.npm_config_nwjs_manifest_url || process.env.NWJS_MANIFEST_URL || "https://nwjs.io/versions.json";
    const cacheDir = process.env.npm_config_nwjs_cache_dir || process.env.NWJS_CACHE_DIR || ".";
    const cache = process.env.npm_config_nwjs_cache !== "false" && process.env.NWJS_CACHE !== "false";
    const ffmpeg = process.env.npm_config_nwjs_ffmpeg === "true" || process.env.NWJS_FFMPEG === "true";
    const nativeAddon = (process.env.npm_config_nwjs_native_addon === "gyp" || process.env.NWJS_NATIVE_ADDON === "gyp") ? "gyp" : false;
    const shaSum = process.env.npm_config_nwjs_shasum !== "false" && process.env.NWJS_SHASUM !== "false";

    await get({
        version,
        flavor,
        platform,
        arch,
        downloadUrl,
        manifestUrl,
        cacheDir,
        cache,
        ffmpeg,
        nativeAddon,
        shaSum,
    });
}