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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| import chokidar, { FSWatcher } from 'chokidar'; | ||
| import { ChokidarOptions } from '../rollup/types'; | ||
| import { Task } from './watch'; | ||
|
|
||
| export class FileWatcher { | ||
| private chokidarOptions: ChokidarOptions; | ||
| private task: Task; | ||
| private transformWatchers = new Map<string, FSWatcher>(); | ||
| private watcher: FSWatcher; | ||
|
|
||
| constructor(task: Task, chokidarOptions: ChokidarOptions) { | ||
| this.chokidarOptions = chokidarOptions; | ||
| this.task = task; | ||
| this.watcher = this.createWatcher(null); | ||
| } | ||
|
|
||
| close() { | ||
| this.watcher.close(); | ||
| for (const watcher of this.transformWatchers.values()) { | ||
| watcher.close(); | ||
| } | ||
| } | ||
|
|
||
| unwatch(id: string) { | ||
| this.watcher.unwatch(id); | ||
| const transformWatcher = this.transformWatchers.get(id); | ||
| if (transformWatcher) { | ||
| this.transformWatchers.delete(id); | ||
| transformWatcher.close(); | ||
| } | ||
| } | ||
|
|
||
| watch(id: string, isTransformDependency: boolean) { | ||
| if (isTransformDependency) { | ||
| const watcher = this.transformWatchers.get(id) || this.createWatcher(id); | ||
| watcher.add(id); | ||
| this.transformWatchers.set(id, watcher); | ||
| } else { | ||
| this.watcher.add(id); | ||
| } | ||
| } | ||
|
|
||
| private createWatcher(transformWatcherId: string | null): FSWatcher { | ||
| const handleChange = transformWatcherId | ||
| ? () => { | ||
| // unwatching and watching fixes an issue with chokidar where on certain systems, | ||
| // a file that was unlinked and immediately recreated would create a change event | ||
| // but then no longer any further events | ||
| watcher.unwatch(transformWatcherId); | ||
| watcher.add(transformWatcherId); | ||
| this.task.invalidate(transformWatcherId, true); | ||
| } | ||
| : (id: string) => { | ||
| watcher.unwatch(id); | ||
| watcher.add(id); | ||
| this.task.invalidate(id, false); | ||
| }; | ||
| const watcher = chokidar | ||
| .watch([], this.chokidarOptions) | ||
| .on('change', handleChange) | ||
| .on('unlink', handleChange); | ||
| return watcher; | ||
| } | ||
| } |
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