plugin-preloader/src/index.ts

This library dynamically preloads and installs Babel and ESLint plugins and presets based on your configuration, streamlining the build process without the need to include them as dependencies in your project.

import { MapEntityWithVersions, Preload } from "./types";
import { babelMap, eslintMap } from "./maps";
import getEntitiesMapWithVersions from "./getEntitiesMapWithVersions";
import { wrappers, transform } from "@core/utils";
import log from "fancy-log";

function preload({ babel, eslint }: Preload) {
  const checkedEntities: MapEntityWithVersions[] = [];

  if (babel) {
    const pluginsAndPresets = transform.babelConfig(babel);
    const pluginsAndPresetsMap = getEntitiesMapWithVersions(pluginsAndPresets, {
      ...babelMap.plugins,
      ...babelMap.presets,
    });
    checkedEntities.push(...Object.values(pluginsAndPresetsMap));
  }

  if (eslint) {
    const pluginsExtendsAndParser = transform.eslintConfig(eslint);
    const pluginsExtendsAndParserMap = getEntitiesMapWithVersions(pluginsExtendsAndParser, {
      ...eslintMap.extendsMap,
      ...eslintMap.parser,
      ...eslintMap.plugins,
    });
    checkedEntities.push(...Object.values(pluginsExtendsAndParserMap));
  }

  if (checkedEntities.length) {
    log("Packages to install:");
  } else {
    log("No packages need to be installed");
    return;
  }

  const packagesToInstall = checkedEntities.reduce((acc, { nameInRegistry, desiredVersion }) => {
    const packageWithVersion = `${nameInRegistry}@${desiredVersion}`;
    log(`- ${packageWithVersion}`);
    return acc + `${packageWithVersion} `;
  }, "");

  const command = `npm install ${packagesToInstall.trim()} --no-save --no-audit`;

  const output = wrappers.syncExec(command, { encoding: "utf8" });

  log(output.trim());
}

export default preload;