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)

server/server/lib/video-file.ts

@@ -0,0 +1,144 @@
+import { FfprobeData } from 'fluent-ffmpeg'
+import { VideoFileMetadata, VideoResolution } from '@peertube/peertube-models'
+import { logger } from '@server/helpers/logger.js'
+import { VideoFileModel } from '@server/models/video/video-file.js'
+import { MVideoWithAllFiles } from '@server/types/models/index.js'
+import { getFileSize, getLowercaseExtension } from '@peertube/peertube-node-utils'
+import { ffprobePromise, getVideoStreamDimensionsInfo, getVideoStreamFPS, isAudioFile } from '@peertube/peertube-ffmpeg'
+import { lTags } from './object-storage/shared/index.js'
+import { generateHLSVideoFilename, generateWebVideoFilename } from './paths.js'
+import { VideoPathManager } from './video-path-manager.js'
+
+async function buildNewFile (options: {
+  path: string
+  mode: 'web-video' | 'hls'
+}) {
+  const { path, mode } = options
+
+  const probe = await ffprobePromise(path)
+  const size = await getFileSize(path)
+
+  const videoFile = new VideoFileModel({
+    extname: getLowercaseExtension(path),
+    size,
+    metadata: await buildFileMetadata(path, probe)
+  })
+
+  if (await isAudioFile(path, probe)) {
+    videoFile.resolution = VideoResolution.H_NOVIDEO
+  } else {
+    videoFile.fps = await getVideoStreamFPS(path, probe)
+    videoFile.resolution = (await getVideoStreamDimensionsInfo(path, probe)).resolution
+  }
+
+  videoFile.filename = mode === 'web-video'
+    ? generateWebVideoFilename(videoFile.resolution, videoFile.extname)
+    : generateHLSVideoFilename(videoFile.resolution)
+
+  return videoFile
+}
+
+// ---------------------------------------------------------------------------
+
+async function removeHLSPlaylist (video: MVideoWithAllFiles) {
+  const hls = video.getHLSPlaylist()
+  if (!hls) return
+
+  const videoFileMutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+
+  try {
+    await video.removeStreamingPlaylistFiles(hls)
+    await hls.destroy()
+
+    video.VideoStreamingPlaylists = video.VideoStreamingPlaylists.filter(p => p.id !== hls.id)
+  } finally {
+    videoFileMutexReleaser()
+  }
+}
+
+async function removeHLSFile (video: MVideoWithAllFiles, fileToDeleteId: number) {
+  logger.info('Deleting HLS file %d of %s.', fileToDeleteId, video.url, lTags(video.uuid))
+
+  const hls = video.getHLSPlaylist()
+  const files = hls.VideoFiles
+
+  if (files.length === 1) {
+    await removeHLSPlaylist(video)
+    return undefined
+  }
+
+  const videoFileMutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+
+  try {
+    const toDelete = files.find(f => f.id === fileToDeleteId)
+    await video.removeStreamingPlaylistVideoFile(video.getHLSPlaylist(), toDelete)
+    await toDelete.destroy()
+
+    hls.VideoFiles = hls.VideoFiles.filter(f => f.id !== toDelete.id)
+  } finally {
+    videoFileMutexReleaser()
+  }
+
+  return hls
+}
+
+// ---------------------------------------------------------------------------
+
+async function removeAllWebVideoFiles (video: MVideoWithAllFiles) {
+  const videoFileMutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+
+  try {
+    for (const file of video.VideoFiles) {
+      await video.removeWebVideoFile(file)
+      await file.destroy()
+    }
+
+    video.VideoFiles = []
+  } finally {
+    videoFileMutexReleaser()
+  }
+
+  return video
+}
+
+async function removeWebVideoFile (video: MVideoWithAllFiles, fileToDeleteId: number) {
+  const files = video.VideoFiles
+
+  if (files.length === 1) {
+    return removeAllWebVideoFiles(video)
+  }
+
+  const videoFileMutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+  try {
+    const toDelete = files.find(f => f.id === fileToDeleteId)
+    await video.removeWebVideoFile(toDelete)
+    await toDelete.destroy()
+
+    video.VideoFiles = files.filter(f => f.id !== toDelete.id)
+  } finally {
+    videoFileMutexReleaser()
+  }
+
+  return video
+}
+
+// ---------------------------------------------------------------------------
+
+async function buildFileMetadata (path: string, existingProbe?: FfprobeData) {
+  const metadata = existingProbe || await ffprobePromise(path)
+
+  return new VideoFileMetadata(metadata)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  buildNewFile,
+
+  removeHLSPlaylist,
+  removeHLSFile,
+  removeAllWebVideoFiles,
+  removeWebVideoFile,
+
+  buildFileMetadata
+}