postinstall.js

"use strict";
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    o["default"] = v;
});
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    if (mod && mod.__esModule) return mod;
    var result = {};
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};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * A postinstall script runs after `@swc/core` is installed.
 *
 * It checks if corresponding optional dependencies for native binary is installed and can be loaded properly.
 * If it fails, it'll internally try to install `@swc/wasm` as fallback.
 */
const fs_1 = require("fs");
const assert = __importStar(require("assert"));
const path = __importStar(require("path"));
const child_process = __importStar(require("child_process"));
const fs = __importStar(require("fs"));
function removeRecursive(dir) {
    for (const entry of fs.readdirSync(dir)) {
        const entryPath = path.join(dir, entry);
        let stats;
        try {
            stats = fs.lstatSync(entryPath);
        }
        catch (_a) {
            continue; // Guard against https://github.com/nodejs/node/issues/4760
        }
        if (stats.isDirectory())
            removeRecursive(entryPath);
        else
            fs.unlinkSync(entryPath);
    }
    fs.rmdirSync(dir);
}
/**
 * Trying to validate @swc/core's native binary installation, then installs if it is not supported.
 */
const validateBinary = () => __awaiter(void 0, void 0, void 0, function* () {
    var _a;
    try {
        const { name } = require(path.resolve(process.env.INIT_CWD, 'package.json'));
        if (name === '@swc/core') {
            return;
        }
    }
    catch (_) {
        return;
    }
    // TODO: We do not take care of the case if user try to install with `--no-optional`.
    // For now, it is considered as deliberate decision.
    let binding;
    try {
        binding = require('./binding');
        // Check if binding binary actually works.
        // For the latest version, checks target triple. If it's old version doesn't have target triple, use parseSync instead.
        const triple = binding.getTargetTriple ? binding.getTargetTriple() : binding.parseSync('console.log()', Buffer.from(JSON.stringify({ syntax: "ecmascript" })));
        assert.ok(triple, 'Failed to read target triple from native binary.');
    }
    catch (error) {
        // if error is unsupported architecture, ignore to display.
        if (!((_a = error.message) === null || _a === void 0 ? void 0 : _a.includes('Unsupported architecture'))) {
            console.warn(error);
        }
        console.warn(`@swc/core was not able to resolve native bindings installation. It'll try to use @swc/wasm as fallback instead.`);
    }
    if (!!binding) {
        return;
    }
    // User choose to override the binary installation. Skip remanining validation.
    if (!!process.env["SWC_BINARY_PATH"]) {
        console.warn(`@swc/core could not resolve native bindings installation, but found manual override config SWC_BINARY_PATH specified. Skipping remaning validation.`);
        return;
    }
    // Check if top-level package.json installs @swc/wasm separately already
    let wasmBinding;
    try {
        wasmBinding = require.resolve(`@swc/wasm`);
    }
    catch (_) {
    }
    if (!!wasmBinding && (0, fs_1.existsSync)(wasmBinding)) {
        return;
    }
    const env = Object.assign(Object.assign({}, process.env), { npm_config_global: undefined });
    const { version } = require(path.join(path.dirname(require.resolve('@swc/core')), 'package.json'));
    // We want to place @swc/wasm next to the @swc/core as if normal installation was done,
    // but can't directly set cwd to INIT_CWD as npm seems to acquire lock to the working dir.
    // Instead, create a temporary inner and move it out.
    const coreDir = path.dirname(require.resolve('@swc/core'));
    const installDir = path.join(coreDir, 'npm-install');
    try {
        fs.mkdirSync(installDir);
        fs.writeFileSync(path.join(installDir, 'package.json'), '{}');
        // Instead of carrying over own dependencies to download & resolve package which increases installation sizes of `@swc/core`,
        // assume & relies on system's npm installation.
        child_process.execSync(`npm install --no-save --loglevel=error --prefer-offline --no-audit --progress=false @swc/wasm@${version}`, { cwd: installDir, stdio: 'pipe', env });
        const installedBinPath = path.join(installDir, 'node_modules', `@swc/wasm`);
        // INIT_CWD is injected via npm. If it doesn't exists, can't proceed.
        fs.renameSync(installedBinPath, path.resolve(process.env.INIT_CWD, 'node_modules', `@swc/wasm`));
    }
    catch (error) {
        console.error(error);
        console.error(`Failed to install fallback @swc/wasm@${version}. @swc/core will not properly.
Please install @swc/wasm manually, or retry whole installation.
If there are unexpected errors, please report at https://github.com/swc-project/swc/issues`);
    }
    finally {
        try {
            removeRecursive(installDir);
        }
        catch (_) {
            // Gracefully ignore any failures. This'll make few leftover files but it shouldn't block installation.
        }
    }
});
validateBinary().catch((error) => {
    // for now just throw the error as-is.
    throw error;
});