1.0.33

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@pushrocks/smartnpm",
-  "version": "1.0.18",
+  "version": "1.0.33",
   "private": false,
   "description": "interface with npm to retrieve package information",
   "main": "dist_ts/index.js",
@@ -12,19 +12,22 @@
     "build": "(tsbuild --web)"
   },
   "devDependencies": {
-    "@gitzone/tsbuild": "^2.1.24",
+    "@gitzone/tsbuild": "^2.1.25",
     "@gitzone/tsrun": "^1.2.12",
-    "@gitzone/tstest": "^1.0.33",
+    "@gitzone/tstest": "^1.0.54",
-    "@pushrocks/tapbundle": "^3.2.1",
+    "@pushrocks/tapbundle": "^3.2.14",
-    "@types/node": "^14.0.14",
+    "@types/node": "^15.0.1",
-    "tslint": "^6.1.2",
+    "tslint": "^6.1.3",
     "tslint-config-prettier": "^1.18.0"
   },
   "dependencies": {
     "@pushrocks/consolecolor": "^2.0.1",
-    "@pushrocks/smartarchive": "^1.0.12",
+    "@pushrocks/levelcache": "^1.0.9",
-    "@pushrocks/smartfile": "^7.0.12",
+    "@pushrocks/smartarchive": "^2.0.4",
-    "@pushrocks/smartrequest": "^1.1.47",
+    "@pushrocks/smartfile": "^8.0.10",
+    "@pushrocks/smartpromise": "^3.1.5",
+    "@pushrocks/smartrequest": "^1.1.51",
+    "@pushrocks/smartversion": "^2.0.7",
     "package-json": "^6.5.0"
   },
   "files": [

test/test.ts

@@ -37,10 +37,169 @@ tap.test('should get package from verdaccio', async () => {
 });
 
 tap.test('should get a specific file from a package', async () => {
-  const bundleFile = await verdaccioRegistry.getFileFromPackage(
+  const wantedFile = await verdaccioRegistry.getFileFromPackage(
     '@pushrocks/websetup',
-    'dist_bundle/bundle.js'
+    'ts/index.ts'
   );
+  console.log(wantedFile.contentBuffer.toString());
+});
+
+tap.test('should get a specific file from a package', async () => {
+  const wantedFiles = await verdaccioRegistry.getFilesFromPackage(
+    '@pushrocks/websetup',
+    'ts/'
+  );
+  for(const file of wantedFiles) {
+    console.log(file.path);
+  }
 });
 
 tap.start();
+
+const hi = {
+  _id: '@pushrocks/smartversion',
+  _rev: '2-93b6e6391f7209fcbd1db76c92164777',
+  name: '@pushrocks/smartversion',
+  'dist-tags': { latest: '2.0.4' },
+  versions: {
+    '2.0.0': {
+      name: '@pushrocks/smartversion',
+      version: '2.0.0',
+      private: false,
+      description: 'handle semver with easy',
+      main: 'dist/index.js',
+      typings: 'dist/index.d.ts',
+      author: { name: 'Lossless GmbH' },
+      license: 'MIT',
+      scripts: { test: '(tstest test/)', build: '(tsbuild)' },
+      devDependencies: {
+        '@gitzone/tsbuild': '^2.0.22',
+        '@gitzone/tsrun': '^1.1.12',
+        '@gitzone/tstest': '^1.0.15',
+        '@pushrocks/tapbundle': '^3.0.5',
+        '@types/node': '^10.9.4',
+      },
+      dependencies: { '@types/semver': '^5.5.0', semver: '^5.5.1' },
+      gitHead: 'df6b1a9730551884aa4c4fae5577b2b11058f508',
+      _id: '@pushrocks/smartversion@2.0.0',
+      _npmVersion: '6.2.0',
+      _nodeVersion: '10.9.0',
+      _npmUser: { name: 'lossless', email: 'npm@lossless.com' },
+      dist: {
+        integrity:
+          'sha512-+loQHivWzEO39X/PEzi+UOptDveez0n8Eu/bDIht55wkjhav33HkNjab8MeK/g76gOia3ZHoPyqLTvD4yvXDiA==',
+        shasum: 'd663a39d77950de1a743adb0c2eb00e325d230df',
+        tarball: 'https://registry.npmjs.org/@pushrocks/smartversion/-/smartversion-2.0.0.tgz',
+        fileCount: 12,
+        unpackedSize: 12011,
+        'npm-signature':
+          '-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: https://openpgpjs.org\r\n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\nBWac\r\n=0NZU\r\n-----END PGP SIGNATURE-----\r\n',
+      },
+      maintainers: [{ name: 'lossless', email: 'npm@lossless.com' }],
+      directories: {},
+      _npmOperationalInternal: {
+        host: 's3://npm-registry-packages',
+        tmp: 'tmp/smartversion_2.0.0_1535884499821_0.9273118882229912',
+      },
+      _hasShrinkwrap: false,
+    },
+    '2.0.3': {
+      name: '@pushrocks/smartversion',
+      version: '2.0.3',
+      private: false,
+      description: 'handle semver with easy',
+      main: 'dist/index.js',
+      typings: 'dist/index.d.ts',
+      author: { name: 'Lossless GmbH' },
+      license: 'MIT',
+      scripts: { test: '(tstest test/)', build: '(tsbuild)' },
+      devDependencies: {
+        '@gitzone/tsbuild': '^2.1.17',
+        '@gitzone/tsrun': '^1.2.8',
+        '@gitzone/tstest': '^1.0.24',
+        '@pushrocks/tapbundle': '^3.0.13',
+        '@types/node': '^12.7.5',
+      },
+      dependencies: { '@types/semver': '^6.0.2', semver: '^6.3.0' },
+      gitHead: 'e364545d0ef6ef7fa1b8467fb48d2b67f09f2d07',
+      _id: '@pushrocks/smartversion@2.0.3',
+      _nodeVersion: '12.10.0',
+      _npmVersion: '6.11.3',
+      dist: {
+        integrity:
+          'sha512-nhauxBGMxjJtXj+k1Z7H2yB184ZhWhU0NKN5ATwlgfEM4zbbZNjCFRLVg/7sOXvbS2b0QU1aStRQ+6QGC2hW4A==',
+        shasum: '9272da89412556946c5a3d5ba3b6a253154de6ae',
+        tarball: 'https://registry.npmjs.org/@pushrocks/smartversion/-/smartversion-2.0.3.tgz',
+        fileCount: 9,
+        unpackedSize: 9127,
+        'npm-signature':
+          '-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: https://openpgpjs.org\r\n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\n9L6F\r\n=yVBx\r\n-----END PGP SIGNATURE-----\r\n',
+      },
+      maintainers: [{ name: 'lossless', email: 'npm@lossless.com' }],
+      _npmUser: { name: 'lossless', email: 'npm@lossless.com' },
+      directories: {},
+      _npmOperationalInternal: {
+        host: 's3://npm-registry-packages',
+        tmp: 'tmp/smartversion_2.0.3_1568216607132_0.9216415895294796',
+      },
+      _hasShrinkwrap: false,
+    },
+    '2.0.4': {
+      name: '@pushrocks/smartversion',
+      version: '2.0.4',
+      private: false,
+      description: 'handle semver with easy',
+      main: 'dist/index.js',
+      typings: 'dist/index.d.ts',
+      author: { name: 'Lossless GmbH' },
+      license: 'MIT',
+      scripts: { test: '(tstest test/)', build: '(tsbuild)' },
+      devDependencies: {
+        '@gitzone/tsbuild': '^2.1.17',
+        '@gitzone/tsrun': '^1.2.8',
+        '@gitzone/tstest': '^1.0.24',
+        '@pushrocks/tapbundle': '^3.0.13',
+        '@types/node': '^12.7.5',
+        tslint: '^5.20.0',
+        'tslint-config-prettier': '^1.18.0',
+      },
+      dependencies: { '@types/semver': '^6.0.2', semver: '^6.3.0' },
+      gitHead: 'bb8e7cb608f3a116e7bfb0b52dd5ce9a7c4eaec1',
+      _id: '@pushrocks/smartversion@2.0.4',
+      _nodeVersion: '12.10.0',
+      _npmVersion: '6.11.3',
+      dist: {
+        integrity:
+          'sha512-LrtaWRn1DD2zIUr8nVAsKwZ+Y55TFIVZ0z3xjwAQ46SoiTrFWooeQ2Xw18DqsEo1cEqMZyGAskaJkOaRkXHtUA==',
+        shasum: '7c6297f9c596e729001c2b6e2a8fa72c40ed42a9',
+        tarball: 'https://registry.npmjs.org/@pushrocks/smartversion/-/smartversion-2.0.4.tgz',
+        fileCount: 9,
+        unpackedSize: 9263,
+        'npm-signature':
+          '-----BEGIN PGP SIGNATURE-----\r\nVersion: OpenPGP.js v3.0.4\r\nComment: https://openpgpjs.org\r\n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\nhmej\r\n=eqby\r\n-----END PGP SIGNATURE-----\r\n',
+      },
+      maintainers: [{ name: 'lossless', email: 'npm@lossless.com' }],
+      _npmUser: { name: 'lossless', email: 'npm@lossless.com' },
+      directories: {},
+      _npmOperationalInternal: {
+        host: 's3://npm-registry-packages',
+        tmp: 'tmp/smartversion_2.0.4_1568216754658_0.06886864906713819',
+      },
+      _hasShrinkwrap: false,
+    },
+  },
+  time: {
+    created: '2018-09-02T10:34:59.735Z',
+    '2.0.0': '2018-09-02T10:34:59.913Z',
+    modified: '2019-09-11T15:45:58.404Z',
+    '2.0.3': '2019-09-11T15:43:27.294Z',
+    '2.0.4': '2019-09-11T15:45:54.786Z',
+  },
+  maintainers: [{ name: 'lossless', email: 'npm@lossless.com' }],
+  description: 'handle semver with easy',
+  author: { name: 'Lossless GmbH' },
+  license: 'MIT',
+  readme:
+    '# @pushrocks/smartversion\nhandle semver with easy\n\n## Availabililty and Links\n* [npmjs.org (npm package)](https://www.npmjs.com/package/@pushrocks/smartversion)\n* [gitlab.com (source)](https://gitlab.com/pushrocks/smartversion)\n* [github.com (source mirror)](https://github.com/pushrocks/smartversion)\n* [docs (typedoc)](https://pushrocks.gitlab.io/smartversion/)\n\n## Status for master\n[![build status](https://gitlab.com/pushrocks/smartversion/badges/master/build.svg)](https://gitlab.com/pushrocks/smartversion/commits/master)\n[![coverage report](https://gitlab.com/pushrocks/smartversion/badges/master/coverage.svg)](https://gitlab.com/pushrocks/smartversion/commits/master)\n[![npm downloads per month](https://img.shields.io/npm/dm/@pushrocks/smartversion.svg)](https://www.npmjs.com/package/@pushrocks/smartversion)\n[![Known Vulnerabilities](https://snyk.io/test/npm/@pushrocks/smartversion/badge.svg)](https://snyk.io/test/npm/@pushrocks/smartversion)\n[![TypeScript](https://img.shields.io/badge/TypeScript->=%203.x-blue.svg)](https://nodejs.org/dist/latest-v10.x/docs/api/)\n[![node](https://img.shields.io/badge/node->=%2010.x.x-blue.svg)](https://nodejs.org/dist/latest-v10.x/docs/api/)\n[![JavaScript Style Guide](https://img.shields.io/badge/code%20style-prettier-ff69b4.svg)](https://prettier.io/)\n\n## Usage\n\nUse TypeScript for best in class instellisense.\n\nFor further information read the linked docs at the top of this readme.\n\n> MIT licensed | **©** [Lossless GmbH](https://lossless.gmbh)\n| By using this npm module you agree to our [privacy policy](https://lossless.gmbH/privacy)\n\n[![repo-footer](https://lossless.gitlab.io/publicrelations/repofooter.svg)](https://maintainedby.lossless.com)\n',
+  readmeFilename: 'readme.md',
+};

ts/smartnpm.classes.npmpackage.ts

@@ -1,13 +1,35 @@
 import * as plugins from './smartnpm.plugins';
 import { NpmRegistry } from './smartnpm.classes.npmregistry';
+import { PackageDisttag } from './smartnpm.classes.packagedisttag';
+import { PackageVersion, IVersionData } from './smartnpm.classes.packageversion';
 
 export class NpmPackage {
-  public static async createFromFullMetadata(
+  public static async createFromFullMetadataAndVersionData(
     npmRegistryArg: NpmRegistry,
-    fullMetadata: plugins.packageJson.FullMetadata
+    fullMetadataArg: plugins.packageJson.FullMetadata,
+    versionsDataArg: {
+      name: string;
+      'dist-tags': { [key: string]: string };
+      versions: { [key: string]: IVersionData };
+    }
   ) {
     const npmPackage = new NpmPackage(npmRegistryArg);
-    Object.assign(npmPackage, fullMetadata);
+    Object.assign(npmPackage, fullMetadataArg);
+    npmPackage.allVersions = [];
+    npmPackage.allDistTags = [];
+    for (const versionArg of Object.keys(versionsDataArg.versions)) {
+      const packageVersion = PackageVersion.createFromVersionData(
+        versionsDataArg.versions[versionArg]
+      );
+      npmPackage.allVersions.push(packageVersion);
+    }
+    for (const distTagArg of Object.keys(versionsDataArg['dist-tags'])) {
+      const packageDistTag = new PackageDisttag(
+        distTagArg,
+        versionsDataArg['dist-tags'][distTagArg]
+      );
+      npmPackage.allDistTags.push(packageDistTag);
+    }
     return npmPackage;
   }
 
@@ -15,6 +37,8 @@ export class NpmPackage {
   public name: string = null;
   public scope: string = null;
   public version: string = null;
+  public allVersions: PackageVersion[];
+  public allDistTags: PackageDisttag[];
   public description: string = null;
   public keywords: string[] = null;
   public date: string;
@@ -48,9 +72,9 @@ export class NpmPackage {
   } = null;
   public searchScore: number = null;
 
-  public npmRegistry: NpmRegistry;
+  public npmRegistryRef: NpmRegistry;
   constructor(npmRegistryArg: NpmRegistry) {
-    this.npmRegistry = npmRegistryArg;
+    this.npmRegistryRef = npmRegistryArg;
   }
 
   /**
@@ -58,6 +82,105 @@ export class NpmPackage {
    */
   public async saveToDisk(targetDir: string) {
     const smartarchiveInstance = new plugins.smartarchive.SmartArchive();
-    await smartarchiveInstance.extractArchiveFromUrl(this.dist.tarball, targetDir);
+    await smartarchiveInstance.extractArchiveFromUrlToFs(this.dist.tarball, targetDir);
+  }
+
+  /**
+   * saves the complete package to cache
+   */
+  public async saveToCache() {}
+
+  /**
+   * get files from package
+   */
+  public async getFilesFromPackage(
+    filePath: string,
+    optionsArg: {
+      distTag?: string;
+      version?: string;
+    },
+    returnOnFirstArg = false
+  ): Promise<plugins.smartfile.Smartfile[]> {
+    const done = plugins.smartpromise.defer<plugins.smartfile.Smartfile[]>();
+    const smartarchiveInstance = new plugins.smartarchive.SmartArchive();
+    let tarballUrl = this.dist?.tarball;
+    if (optionsArg?.version || optionsArg?.distTag) {
+      if (optionsArg.distTag && optionsArg.version) {
+        throw new Error('Please either specify version OR disttag, not both.');
+      }
+      let targetVersionString: string;
+      if (optionsArg.distTag) {
+        const targetDistTag = this.allDistTags.find((distTag) => {
+          return distTag.name === optionsArg.distTag;
+        });
+        if (targetDistTag) {
+          targetVersionString = targetDistTag.targetVersion;
+        }
+      } else {
+        targetVersionString = optionsArg.version;
+      }
+
+      // lets find the best matching release
+      const bestMatchingVersion = this.getBestMatchingVersion(targetVersionString);
+      if (!bestMatchingVersion) {
+        return null;
+      }
+      tarballUrl = this.allVersions.find(
+        (packageVersion) => packageVersion.version === bestMatchingVersion
+      ).dist.tarball;
+    }
+    const fileObservable = await smartarchiveInstance.extractArchiveFromUrlToObservable(tarballUrl);
+    const wantedFilePath = plugins.path.join('package', filePath);
+    const allMatchingFiles: plugins.smartfile.Smartfile[] = [];
+    const subscription = fileObservable.subscribe(
+      (fileArg) => {
+        // returnOnFirstArg requires exact match
+        if (returnOnFirstArg && fileArg.path === wantedFilePath) {
+          // lets resolve with the wanted file
+          done.resolve([fileArg]);
+          subscription.unsubscribe();
+        } else if(!returnOnFirstArg && fileArg.path.startsWith(wantedFilePath)) {
+          allMatchingFiles.push(fileArg);
+        }
+      },
+      (err) => {
+        console.log(err);
+      },
+      () => {
+        done.resolve(allMatchingFiles);
+        subscription.unsubscribe();
+      }
+    );
+    return done.promise;
+  }
+
+  /**
+   * get files from package
+   */
+   public async getFileFromPackage(
+    filePath: string,
+    optionsArg?: {
+      distTag?: string;
+      version?: string;
+    }
+  ): Promise<plugins.smartfile.Smartfile> {
+    const result = await this.getFilesFromPackage(filePath, optionsArg, true);
+    return result[0];
+  }
+
+  /**
+   * updates the package with information from the registry
+   */
+  update() {}
+
+  /** */
+  public getBestMatchingVersion(versionArg: string): string {
+    // lets find the best matching release
+    const targetVersion = plugins.smartversion.SmartVersion.fromFuzzyString(versionArg);
+    const versionStrings = this.allVersions.map((packageVersion) => packageVersion.version);
+    const bestMatchingVersion = targetVersion.getBestMatch(versionStrings);
+    if (!bestMatchingVersion) {
+      return null;
+    }
   }
 }

ts/smartnpm.classes.npmregistry.ts

@@ -6,6 +6,7 @@ import { ISearchObject } from './smartnpm.interfaces';
 
 // classes
 import { NpmPackage } from './smartnpm.classes.npmpackage';
+import { RegistryCache } from './smartnpm.classes.registrycache';
 
 export interface INpmRegistryConstructorOptions {
   npmRegistryUrl?: string;
@@ -13,7 +14,7 @@ export interface INpmRegistryConstructorOptions {
 
 export class NpmRegistry {
   public options: INpmRegistryConstructorOptions;
-  public registry: string;
+  public registryCache: RegistryCache;
   private searchDomain = 'https://api.npms.io/v2/search?q=';
 
   constructor(optionsArg: INpmRegistryConstructorOptions = {}) {
@@ -24,6 +25,7 @@ export class NpmRegistry {
       ...defaultOptions,
       ...optionsArg,
     };
+    this.registryCache = new RegistryCache(this);
   }
 
   /**
@@ -34,8 +36,15 @@ export class NpmRegistry {
     const fullMetadata = await plugins.packageJson(packageName, {
       registryUrl: this.options.npmRegistryUrl,
       fullMetadata: true,
+    }).catch(err => {
+      console.log(err);
+      return null;
     });
-    const npmPackage = await NpmPackage.createFromFullMetadata(this, fullMetadata);
+    const versionData = await plugins.packageJson(packageName, {
+      registryUrl: this.options.npmRegistryUrl,
+      allVersions: true
+    });
+    const npmPackage = await NpmPackage.createFromFullMetadataAndVersionData(this, fullMetadata, versionData as any);
     return npmPackage;
   }
 
@@ -45,6 +54,7 @@ export class NpmRegistry {
    * @param targetDir
    */
   public async savePackageToDisk(packageName: string, targetDir: string): Promise<void> {
+    plugins.smartfile.fs.ensureDirSync(paths.nogitDir);
     const npmPackage = await this.getPackageInfo(packageName);
     await npmPackage.saveToDisk(targetDir);
   }
@@ -52,15 +62,56 @@ export class NpmRegistry {
   /**
    * gets a file from a package as Smartfile
    */
-  public async getFileFromPackage(packageName: string, filePath: string) {
+  public async getFileFromPackage(packageNameArg: string, filePath: string, optionsArg?: {
-    const baseDir = plugins.path.join(paths.nogitDir, packageName.replace('/', '__'));
+    distTag?: string;
+    version?: string;
+  }): Promise<plugins.smartfile.Smartfile> {
+    const fileId = `${this.options.npmRegistryUrl}//+//${packageNameArg}//+//${filePath}//+//${optionsArg?.distTag || optionsArg?.version}`;
+    const cachedFile: plugins.smartfile.Smartfile = await this.registryCache.getCachedFile(fileId);
+    if (!cachedFile) {
+      const npmPackage = await this.getPackageInfo(packageNameArg);
+      if (!optionsArg?.version && !optionsArg?.distTag) {
+        const latestAvailable = npmPackage.allDistTags.find(packageArg => packageArg.name === 'latest');
+        if (!latestAvailable) {
+          optionsArg = {
+            version: npmPackage.getBestMatchingVersion('*')
+          };
+        }
+      }
+      const fileResult = await npmPackage.getFileFromPackage(filePath, optionsArg);
+      this.registryCache.cacheSmartFile(fileId, fileResult);
+      return fileResult;
+    } else {
+      return cachedFile;
+    }
+  }
+
+  public async getFilesFromPackage(packageNameArg: string, filePath: string, optionsArg?: {
+    distTag?: string;
+    version?: string;
+  }): Promise<plugins.smartfile.Smartfile[]> {
+    const npmPackage = await this.getPackageInfo(packageNameArg);
+    if (!optionsArg?.version && !optionsArg?.distTag) {
+      const latestAvailable = npmPackage.allDistTags.find(packageDistTagArg => packageDistTagArg.name === 'latest');
+      if (!latestAvailable) {
+        optionsArg = {
+          version: npmPackage.getBestMatchingVersion('*')
+        };
+      }
+    }
+    return npmPackage.getFilesFromPackage(filePath, optionsArg);
+  }
+
+  public async getPackageAsSmartfileVirtualDir(packageNameArg: string): Promise<plugins.smartfile.VirtualDirectory> {
+    /**
+     * TODO: rewrite as memory only
+     */
+    const baseDir = plugins.path.join(paths.nogitDir, packageNameArg.replace('/', '__'));
     await plugins.smartfile.fs.ensureDir(baseDir);
-    await this.savePackageToDisk(packageName, baseDir);
+    await this.savePackageToDisk(packageNameArg, baseDir);
-    const smartfile = await plugins.smartfile.Smartfile.fromFilePath(
+    const virtualDir = await plugins.smartfile.VirtualDirectory.fromFsDirPath(baseDir);
-      plugins.path.join(baseDir, 'package', filePath)
-    );
     await plugins.smartfile.fs.remove(baseDir);
-    return smartfile;
+    return virtualDir;
   }
 
   /**

ts/smartnpm.classes.packagedisttag.ts

@@ -0,0 +1,11 @@
+import * as plugins from './smartnpm.plugins';
+
+export class PackageDisttag {
+  name: string;
+  targetVersion: string;
+
+  constructor(nameArg: string, targetVersionArg: string) {
+    this.name = nameArg;
+    this.targetVersion = targetVersionArg;
+  }
+}

ts/smartnpm.classes.packageversion.ts

@@ -0,0 +1,31 @@
+import * as plugins from './smartnpm.plugins';
+
+export interface IVersionData {
+  name: string;
+  version: string;
+  dependencies: { [key: string]: string };
+  devDependencies: { [key: string]: string };
+  dist: {
+    integrity: string;
+    shasum: string;
+    tarball: string;
+  };
+}
+
+export class PackageVersion implements IVersionData {
+  public static createFromVersionData(versionDataArg: IVersionData) {
+    const packageVersion = new PackageVersion();
+    Object.assign(packageVersion, versionDataArg);
+    return packageVersion;
+  }
+
+  name: string;
+  version: string;
+  dependencies: { [key: string]: string };
+  devDependencies: { [key: string]: string };
+  dist: {
+    integrity: string;
+    shasum: string;
+    tarball: string;
+  };
+}

ts/smartnpm.classes.registrycache.ts

@@ -0,0 +1,32 @@
+import { NpmRegistry } from './smartnpm.classes.npmregistry';
+import * as plugins from './smartnpm.plugins';
+
+export class RegistryCache {
+  npmregistryRef: NpmRegistry;
+  public levelCache: plugins.levelcache.LevelCache;
+
+  constructor(npmRegistryRefArg: NpmRegistry) {
+    this.npmregistryRef = npmRegistryRefArg;
+    this.levelCache = new plugins.levelcache.LevelCache({
+      cacheId: encodeURIComponent(this.npmregistryRef.options.npmRegistryUrl),
+      
+    });
+  }
+
+  public async getCachedFile (fileId: string): Promise<plugins.smartfile.Smartfile> {
+    const cacheEntry = await this.levelCache.retrieveCacheEntryByKey(fileId);
+    if (cacheEntry) {
+      return plugins.smartfile.Smartfile.fromFoldedJson(cacheEntry.contents.toString());
+    }
+    return null;
+  }
+
+  public async cacheSmartFile (fileIdArg: string, smartfileArg: plugins.smartfile.Smartfile) {
+    if (smartfileArg) {
+      await this.levelCache.storeCacheEntryByKey(fileIdArg, new plugins.levelcache.CacheEntry({
+        contents: Buffer.from(smartfileArg.foldToJson()),
+        ttl: 60000
+      }));
+    }
+  }
+}

ts/smartnpm.paths.ts

@@ -2,4 +2,3 @@ import * as plugins from './smartnpm.plugins';
 
 export const packageDir = plugins.path.join(__dirname, '../');
 export const nogitDir = plugins.path.join(packageDir, '.nogit/');
-plugins.smartfile.fs.ensureDirSync(nogitDir);

ts/smartnpm.plugins.ts

@@ -5,11 +5,14 @@ export { path };
 
 // @pushrocks scope
 import * as consolecolor from '@pushrocks/consolecolor';
+import * as levelcache from '@pushrocks/levelcache';
 import * as smartarchive from '@pushrocks/smartarchive';
 import * as smartfile from '@pushrocks/smartfile';
+import * as smartpromise from '@pushrocks/smartpromise';
 import * as smartrequest from '@pushrocks/smartrequest';
+import * as smartversion from '@pushrocks/smartversion';
 
-export { consolecolor, smartarchive, smartfile, smartrequest };
+export { consolecolor, levelcache, smartarchive, smartfile, smartpromise, smartrequest, smartversion };
 
 // third party scope
 import packageJson from 'package-json';