@type {WatchMethod}
( files, directories, missing, startTime, options, callback, callbackUndelayed )
| 34 | |
| 35 | /** @type {WatchMethod} */ |
| 36 | watch( |
| 37 | files, |
| 38 | directories, |
| 39 | missing, |
| 40 | startTime, |
| 41 | options, |
| 42 | callback, |
| 43 | callbackUndelayed |
| 44 | ) { |
| 45 | if (!files || typeof files[Symbol.iterator] !== "function") { |
| 46 | throw new Error("Invalid arguments: 'files'"); |
| 47 | } |
| 48 | if (!directories || typeof directories[Symbol.iterator] !== "function") { |
| 49 | throw new Error("Invalid arguments: 'directories'"); |
| 50 | } |
| 51 | if (!missing || typeof missing[Symbol.iterator] !== "function") { |
| 52 | throw new Error("Invalid arguments: 'missing'"); |
| 53 | } |
| 54 | if (typeof callback !== "function") { |
| 55 | throw new Error("Invalid arguments: 'callback'"); |
| 56 | } |
| 57 | if (typeof startTime !== "number" && startTime) { |
| 58 | throw new Error("Invalid arguments: 'startTime'"); |
| 59 | } |
| 60 | if (typeof options !== "object") { |
| 61 | throw new Error("Invalid arguments: 'options'"); |
| 62 | } |
| 63 | if (typeof callbackUndelayed !== "function" && callbackUndelayed) { |
| 64 | throw new Error("Invalid arguments: 'callbackUndelayed'"); |
| 65 | } |
| 66 | const oldWatcher = this.watcher; |
| 67 | this.watcher = new Watchpack(options); |
| 68 | |
| 69 | if (callbackUndelayed) { |
| 70 | this.watcher.once("change", callbackUndelayed); |
| 71 | } |
| 72 | |
| 73 | const fetchTimeInfo = () => { |
| 74 | /** @type {TimeInfoEntries} */ |
| 75 | const fileTimeInfoEntries = new Map(); |
| 76 | /** @type {TimeInfoEntries} */ |
| 77 | const contextTimeInfoEntries = new Map(); |
| 78 | if (this.watcher) { |
| 79 | this.watcher.collectTimeInfoEntries( |
| 80 | fileTimeInfoEntries, |
| 81 | contextTimeInfoEntries |
| 82 | ); |
| 83 | } |
| 84 | return { fileTimeInfoEntries, contextTimeInfoEntries }; |
| 85 | }; |
| 86 | const directoriesSet = |
| 87 | directories instanceof Set ? directories : new Set(directories); |
| 88 | |
| 89 | // Watchpack reports a watched directory (a context dependency) in |
| 90 | // `changes` whenever its contents change, alongside the individual |
| 91 | // file events. The default `fs.purge(dir)` matches cache keys by |
| 92 | // prefix, so it would wipe the stat cache of every file inside the |
| 93 | // directory even though only file-level events actually invalidate |