@homer0/package-info/dist/esm/index.js

Gets the content of the project's package.json

import * as fsSync from "fs";
import * as fsPromises from "fs/promises";
import { pathUtils } from "@homer0/path-utils";
import { deferred } from "@homer0/deferred";
import { providerCreator, injectHelper } from "@homer0/jimple";
const deps = injectHelper();
class PackageInfo {
  /**
   * A deferred promise that resolves when the package.json file is read. It will be
   * `undefined` if the file hasn't been read yet, or the contents are already saved in
   * the service.
   */
  defer;
  /**
   * This property will store the contents of the file once it is read.
   */
  contents;
  /**
   * The absolute path to the package.json file.
   */
  filepath;
  constructor({ inject = {} } = {}) {
    const usePathUtils = deps.get(inject, "pathUtils", () => pathUtils());
    this.filepath = usePathUtils.join("package.json");
  }
  /**
   * Gets the contents of the implementation's package.json file.
   */
  async get() {
    if (this.contents) return this.contents;
    if (this.defer) return this.defer.promise;
    this.defer = deferred();
    const packageJson = await fsPromises.readFile(this.filepath, "utf8");
    return this.updateContents(packageJson);
  }
  /**
   * Synchronously gets the contents of the implementation's package.json file.
   */
  getSync() {
    if (this.contents) return this.contents;
    const packageJson = fsSync.readFileSync(this.filepath, "utf8");
    return this.updateContents(packageJson);
  }
  /**
   * This is a helper that takes care of updating the property with the file contents, and
   * if the deferred promise exists, resolve it and delete it.
   *
   * @param contents  The contents of the package.json file.
   */
  updateContents(contents) {
    this.contents = JSON.parse(contents);
    if (this.defer) {
      this.defer.resolve(this.contents);
      this.defer = void 0;
    }
    return this.contents;
  }
}
const packageInfo = (...args) => new PackageInfo(...args);
const packageInfoProvider = providerCreator(
  ({ serviceName = "packageInfo", ...rest } = {}) => (container) => {
    container.set(serviceName, () => {
      const { services = {} } = rest;
      const inject = deps.resolve(["pathUtils"], container, services);
      return new PackageInfo({ inject });
    });
  }
);
export {
  PackageInfo,
  packageInfo,
  packageInfoProvider
};
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