package-preview/lib/index.js

Creates a production preview of a package

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const exec_1 = require("@pnpm/exec");
const path = require("path");
const writeJsonFile = require("write-json-file");
const getPreviewDir_1 = require("./getPreviewDir");
const publishToDir_1 = require("./publishToDir");
const DEFAULT_OPTIONS = {
    skipPrepack: false,
    skipPrepare: false,
    skipPrepublish: false,
    skipPrepublishOnly: false,
};
async function default_1(what, where, maybeOpts) {
    const opts = { ...DEFAULT_OPTIONS, ...maybeOpts };
    const pkgDir = path.resolve(what);
    where = path.resolve(where);
    if (alreadyRunsFor(pkgDir)) {
        throw new Error('package-preview cannot be executed inside another package-preview. ' +
            'You might have a loop somewhere. Try running package-preview with --skip-prepublish or --skip-prepublishOnly flag');
    }
    const subenv = Object.create(process.env);
    subenv.PREVIEW_IS_RUNNING = process.env.PREVIEW_IS_RUNNING
        ? process.env.PREVIEW_IS_RUNNING + path.delimiter + pkgDir
        : pkgDir;
    const previewDir = await getPreviewDir_1.default(where, path.basename(pkgDir));
    const pkg = require(path.join(pkgDir, 'package.json'));
    const distDir = path.join(previewDir, pkg.name);
    await publishToDir_1.default(pkgDir, distDir, { ...opts, env: subenv });
    const wrapperPkg = {
        dependencies: pkg.peerDependencies || {},
    };
    // Would be better to install the package dirrectly from the tarball
    // in that case this hack would not be needed
    if (pkg.scripts) {
        delete pkg.scripts.prepare;
        delete pkg.scripts.prepublish;
    }
    await writeJsonFile(path.join(distDir, 'package.json'), pkg);
    await writeJsonFile(path.join(previewDir, 'package.json'), wrapperPkg);
    // This is where the peer dependencies are installed
    await exec_1.default(['install', '--production'], {
        cwd: previewDir,
        env: subenv,
    });
    // Dependencies in the preview folder are installed during linking
    await exec_1.default(['link', '--production', path.relative(where, distDir)], {
        cwd: where,
        env: subenv,
    });
}
exports.default = default_1;
function alreadyRunsFor(pkgDir) {
    const pkgs = typeof process.env.PREVIEW_IS_RUNNING === 'string'
        ? process.env.PREVIEW_IS_RUNNING.split(path.delimiter)
        : [];
    return pkgs.indexOf(pkgDir) !== -1;
}
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