/
watch.ts
273 lines (245 loc) · 7.05 KB
/
watch.ts
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import { resolve } from 'node:path';
import process from 'node:process';
import { createFilter } from '@rollup/pluginutils';
import { rollupInternal } from '../rollup/rollup';
import type {
ChangeEvent,
MergedRollupOptions,
OutputOptions,
RollupBuild,
RollupCache,
RollupWatcher,
WatcherOptions
} from '../rollup/types';
import { mergeOptions } from '../utils/options/mergeOptions';
import type { GenericConfigObject } from '../utils/options/options';
import { FileWatcher } from './fileWatcher';
const eventsRewrites: Record<ChangeEvent, Record<ChangeEvent, ChangeEvent | 'buggy' | null>> = {
create: {
create: 'buggy',
delete: null, //delete file from map
update: 'create'
},
delete: {
create: 'update',
delete: 'buggy',
update: 'buggy'
},
update: {
create: 'buggy',
delete: 'delete',
update: 'update'
}
};
export class Watcher {
readonly emitter: RollupWatcher;
private buildDelay = 0;
private buildTimeout: NodeJS.Timer | null = null;
private closed = false;
private readonly invalidatedIds = new Map<string, ChangeEvent>();
private rerun = false;
private running = true;
private readonly tasks: Task[];
constructor(configs: readonly GenericConfigObject[], emitter: RollupWatcher) {
this.emitter = emitter;
emitter.close = this.close.bind(this);
this.tasks = configs.map(config => new Task(this, config));
this.buildDelay = configs.reduce(
(buildDelay, { watch }) =>
watch && typeof (watch as WatcherOptions).buildDelay === 'number'
? Math.max(buildDelay, (watch as WatcherOptions).buildDelay!)
: buildDelay,
this.buildDelay
);
process.nextTick(() => this.run());
}
async close(): Promise<void> {
if (this.closed) return;
this.closed = true;
if (this.buildTimeout) clearTimeout(this.buildTimeout);
for (const task of this.tasks) {
task.close();
}
await this.emitter.emit('close');
this.emitter.removeAllListeners();
}
invalidate(file?: { event: ChangeEvent; id: string }): void {
if (file) {
const prevEvent = this.invalidatedIds.get(file.id);
const event = prevEvent ? eventsRewrites[prevEvent][file.event] : file.event;
if (event === 'buggy') {
//TODO: throws or warn? Currently just ignore, uses new event
this.invalidatedIds.set(file.id, file.event);
} else if (event === null) {
this.invalidatedIds.delete(file.id);
} else {
this.invalidatedIds.set(file.id, event);
}
}
if (this.running) {
this.rerun = true;
return;
}
if (this.buildTimeout) clearTimeout(this.buildTimeout);
this.buildTimeout = setTimeout(async () => {
this.buildTimeout = null;
try {
await Promise.all(
[...this.invalidatedIds].map(([id, event]) => this.emitter.emit('change', id, { event }))
);
this.invalidatedIds.clear();
await this.emitter.emit('restart');
this.emitter.removeListenersForCurrentRun();
this.run();
} catch (error: any) {
this.invalidatedIds.clear();
await this.emitter.emit('event', {
code: 'ERROR',
error,
result: null
});
await this.emitter.emit('event', {
code: 'END'
});
}
}, this.buildDelay);
}
private async run(): Promise<void> {
this.running = true;
await this.emitter.emit('event', {
code: 'START'
});
for (const task of this.tasks) {
await task.run();
}
this.running = false;
await this.emitter.emit('event', {
code: 'END'
});
if (this.rerun) {
this.rerun = false;
this.invalidate();
}
}
}
export class Task {
cache: RollupCache = { modules: [] };
watchFiles: string[] = [];
private closed = false;
private readonly fileWatcher: FileWatcher;
private filter: (id: string) => boolean;
private invalidated = true;
private readonly options: MergedRollupOptions;
private readonly outputFiles: string[];
private readonly outputs: OutputOptions[];
private skipWrite: boolean;
private watched = new Set<string>();
private readonly watcher: Watcher;
constructor(watcher: Watcher, config: GenericConfigObject) {
this.watcher = watcher;
this.skipWrite = Boolean(config.watch && (config.watch as GenericConfigObject).skipWrite);
this.options = mergeOptions(config);
this.outputs = this.options.output;
this.outputFiles = this.outputs.map(output => {
if (output.file || output.dir) return resolve(output.file || output.dir!);
return undefined as never;
});
const watchOptions: WatcherOptions = this.options.watch || {};
this.filter = createFilter(watchOptions.include, watchOptions.exclude);
this.fileWatcher = new FileWatcher(this, {
...watchOptions.chokidar,
disableGlobbing: true,
ignoreInitial: true
});
}
close(): void {
this.closed = true;
this.fileWatcher.close();
}
invalidate(id: string, details: { event: ChangeEvent; isTransformDependency?: boolean }): void {
this.invalidated = true;
if (details.isTransformDependency) {
for (const module of this.cache.modules) {
if (!module.transformDependencies.includes(id)) continue;
// effective invalidation
module.originalCode = null as never;
}
}
this.watcher.invalidate({ event: details.event, id });
}
async run(): Promise<void> {
if (!this.invalidated) return;
this.invalidated = false;
const options = {
...this.options,
cache: this.cache
};
const start = Date.now();
await this.watcher.emitter.emit('event', {
code: 'BUNDLE_START',
input: this.options.input,
output: this.outputFiles
});
let result: RollupBuild | null = null;
try {
result = await rollupInternal(options, this.watcher.emitter);
if (this.closed) {
return;
}
this.updateWatchedFiles(result);
this.skipWrite || (await Promise.all(this.outputs.map(output => result!.write(output))));
await this.watcher.emitter.emit('event', {
code: 'BUNDLE_END',
duration: Date.now() - start,
input: this.options.input,
output: this.outputFiles,
result
});
} catch (error: any) {
if (!this.closed) {
if (Array.isArray(error.watchFiles)) {
for (const id of error.watchFiles) {
this.watchFile(id);
}
}
if (error.id) {
this.cache.modules = this.cache.modules.filter(module => module.id !== error.id);
}
}
await this.watcher.emitter.emit('event', {
code: 'ERROR',
error,
result
});
}
}
private updateWatchedFiles(result: RollupBuild) {
const previouslyWatched = this.watched;
this.watched = new Set();
this.watchFiles = result.watchFiles;
this.cache = result.cache!;
for (const id of this.watchFiles) {
this.watchFile(id);
}
for (const module of this.cache.modules) {
for (const depId of module.transformDependencies) {
this.watchFile(depId, true);
}
}
for (const id of previouslyWatched) {
if (!this.watched.has(id)) {
this.fileWatcher.unwatch(id);
}
}
}
private watchFile(id: string, isTransformDependency = false) {
if (!this.filter(id)) return;
this.watched.add(id);
if (this.outputFiles.some(file => file === id)) {
throw new Error('Cannot import the generated bundle');
}
// this is necessary to ensure that any 'renamed' files
// continue to be watched following an error
this.fileWatcher.watch(id, isTransformDependency);
}
}