Migrate server to ESM

Sorry for the very big commit that may lead to git log issues and merge
conflicts, but it's a major step forward:

 * Server can be faster at startup because imports() are async and we can
   easily lazy import big modules
 * Angular doesn't seem to support ES import (with .js extension), so we
   had to correctly organize peertube into a monorepo:
    * Use yarn workspace feature
    * Use typescript reference projects for dependencies
    * Shared projects have been moved into "packages", each one is now a
      node module (with a dedicated package.json/tsconfig.json)
    * server/tools have been moved into apps/ and is now a dedicated app
      bundled and published on NPM so users don't have to build peertube
      cli tools manually
    * server/tests have been moved into packages/ so we don't compile
      them every time we want to run the server
 * Use isolatedModule option:
   * Had to move from const enum to const
     (https://www.typescriptlang.org/docs/handbook/enums.html#objects-vs-enums)
   * Had to explictely specify "type" imports when used in decorators
 * Prefer tsx (that uses esbuild under the hood) instead of ts-node to
   load typescript files (tests with mocha or scripts):
     * To reduce test complexity as esbuild doesn't support decorator
       metadata, we only test server files that do not import server
       models
     * We still build tests files into js files for a faster CI
 * Remove unmaintained peertube CLI import script
 * Removed some barrels to speed up execution (less imports)

1 files changed, 0 insertions, 58 deletions

diff --git a/server/lib/files-cache/video-previews-simple-file-cache.ts b/server/lib/files-cache/video-previews-simple-file-cache.ts
deleted file mode 100644
index a05e80e16..000000000
--- a/server/lib/files-cache/video-previews-simple-file-cache.ts
+++ /dev/null
@@ -1,58 +0,0 @@
-import { join } from 'path'
-import { FILES_CACHE } from '../../initializers/constants'
-import { VideoModel } from '../../models/video/video'
-import { AbstractSimpleFileCache } from './shared/abstract-simple-file-cache'
-import { doRequestAndSaveToFile } from '@server/helpers/requests'
-import { ThumbnailModel } from '@server/models/video/thumbnail'
-import { ThumbnailType } from '@shared/models'
-import { logger } from '@server/helpers/logger'
-
-class VideoPreviewsSimpleFileCache extends AbstractSimpleFileCache <string> {
-
-  private static instance: VideoPreviewsSimpleFileCache
-
-  private constructor () {
-    super()
-  }
-
-  static get Instance () {
-    return this.instance || (this.instance = new this())
-  }
-
-  async getFilePathImpl (filename: string) {
-    const thumbnail = await ThumbnailModel.loadWithVideoByFilename(filename, ThumbnailType.PREVIEW)
-    if (!thumbnail) return undefined
-
-    if (thumbnail.Video.isOwned()) return { isOwned: true, path: thumbnail.getPath() }
-
-    return this.loadRemoteFile(thumbnail.Video.uuid)
-  }
-
-  // Key is the video UUID
-  protected async loadRemoteFile (key: string) {
-    const video = await VideoModel.loadFull(key)
-    if (!video) return undefined
-
-    if (video.isOwned()) throw new Error('Cannot load remote preview of owned video.')
-
-    const preview = video.getPreview()
-    const destPath = join(FILES_CACHE.PREVIEWS.DIRECTORY, preview.filename)
-    const remoteUrl = preview.getOriginFileUrl(video)
-
-    try {
-      await doRequestAndSaveToFile(remoteUrl, destPath)
-
-      logger.debug('Fetched remote preview %s to %s.', remoteUrl, destPath)
-
-      return { isOwned: false, path: destPath }
-    } catch (err) {
-      logger.info('Cannot fetch remote preview file %s.', remoteUrl, { err })
-
-      return undefined
-    }
-  }
-}
-
-export {
-  VideoPreviewsSimpleFileCache
-}