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inclusive-node-watch-file-system.ts
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inclusive-node-watch-file-system.ts
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import { extname } from 'path';
import type { FSWatcher } from 'chokidar';
import chokidar from 'chokidar';
import minimatch from 'minimatch';
import type { Compiler } from 'webpack';
import { clearFilesChange, updateFilesChange } from '../files-change';
import { getInfrastructureLogger } from '../infrastructure-logger';
import type { ForkTsCheckerWebpackPluginState } from '../plugin-state';
import type { WatchFileSystem } from './watch-file-system';
const BUILTIN_IGNORED_DIRS = ['.git'];
function createIsIgnored(
ignored: string | RegExp | (string | RegExp)[] | undefined,
excluded: string[]
): (path: string) => boolean {
const ignoredPatterns = ignored ? (Array.isArray(ignored) ? ignored : [ignored]) : [];
const ignoredFunctions = ignoredPatterns.map((pattern) => {
// ensure patterns are valid - see https://github.com/TypeStrong/fork-ts-checker-webpack-plugin/issues/594
if (typeof pattern === 'string') {
return (path: string) => minimatch(path, pattern);
} else if (pattern instanceof RegExp) {
return (path: string) => pattern.test(path);
} else {
// fallback to no-ignore function
return () => false;
}
});
ignoredFunctions.push((path: string) =>
excluded.some((excludedPath) => path.startsWith(excludedPath))
);
ignoredFunctions.push((path: string) =>
BUILTIN_IGNORED_DIRS.some(
(ignoredDir) => path.includes(`/${ignoredDir}/`) || path.includes(`\\${ignoredDir}\\`)
)
);
return function isIgnored(path: string) {
return ignoredFunctions.some((ignoredFunction) => ignoredFunction(path));
};
}
class InclusiveNodeWatchFileSystem implements WatchFileSystem {
get watcher() {
return this.watchFileSystem.watcher || this.watchFileSystem.wfs?.watcher;
}
private readonly dirsWatchers: Map<string, FSWatcher | undefined>;
private paused = true;
private deletedFiles: Set<string>;
constructor(
private watchFileSystem: WatchFileSystem,
private compiler: Compiler,
private pluginState: ForkTsCheckerWebpackPluginState
) {
this.dirsWatchers = new Map();
this.deletedFiles = new Set();
}
watch: WatchFileSystem['watch'] = (
files,
dirs,
missing,
startTime,
options,
callback,
callbackUndelayed
) => {
const { debug } = getInfrastructureLogger(this.compiler);
clearFilesChange(this.compiler);
const isIgnored = createIsIgnored(
options?.ignored,
this.pluginState.lastDependencies?.excluded || []
);
// use standard watch file system for files and missing
const standardWatcher = this.watchFileSystem.watch(
files,
dirs,
missing,
startTime,
options,
callback,
callbackUndelayed
);
this.watcher?.on('change', (file: string) => {
if (typeof file !== 'string') {
return;
}
if (!isIgnored(file)) {
debug('Detected file change', file);
this.deletedFiles.delete(file);
updateFilesChange(this.compiler, { changedFiles: [file] });
} else {
debug("Detected file change but it's ignored", file);
}
});
this.watcher?.on('remove', (file: string) => {
if (typeof file !== 'string') {
return;
}
if (this.deletedFiles.has(file)) {
debug('Skipping duplicated remove event.');
return;
}
if (!isIgnored(file)) {
debug('Detected file remove', file);
this.deletedFiles.add(file);
updateFilesChange(this.compiler, { deletedFiles: [file] });
} else {
debug("Detected file remove but it's ignored", file);
}
});
// calculate what to change
const prevDirs = Array.from(this.dirsWatchers.keys());
const nextDirs = Array.from(this.pluginState.lastDependencies?.dirs || []);
const dirsToUnwatch = prevDirs.filter((prevDir) => !nextDirs.includes(prevDir));
const dirsToWatch = nextDirs.filter(
(nextDir) => !prevDirs.includes(nextDir) && !isIgnored(nextDir)
);
// update dirs watcher
dirsToUnwatch.forEach((dirToUnwatch) => {
this.dirsWatchers.get(dirToUnwatch)?.close();
this.dirsWatchers.delete(dirToUnwatch);
});
dirsToWatch.forEach((dirToWatch) => {
const interval = typeof options?.poll === 'number' ? options.poll : undefined;
const dirWatcher = chokidar.watch(dirToWatch, {
ignoreInitial: true,
ignorePermissionErrors: true,
ignored: (path: string) => isIgnored(path),
usePolling: options?.poll ? true : undefined,
interval: interval,
binaryInterval: interval,
alwaysStat: true,
atomic: true,
awaitWriteFinish: true,
});
dirWatcher.on('add', (file, stats) => {
if (this.paused) {
return;
}
const extension = extname(file);
const supportedExtensions = this.pluginState.lastDependencies?.extensions || [];
if (!supportedExtensions.includes(extension)) {
debug('Detected new file add but extension is not supported', file);
return;
}
debug('Detected new file add', file);
this.deletedFiles.delete(file);
updateFilesChange(this.compiler, { changedFiles: [file] });
this.watcher?._onChange(dirToWatch, stats?.mtimeMs || stats?.ctimeMs || 1, file, 'rename');
});
dirWatcher.on('unlink', (file) => {
if (this.paused) {
return;
}
const extension = extname(file);
const supportedExtensions = this.pluginState.lastDependencies?.extensions || [];
if (!supportedExtensions.includes(extension)) {
debug('Detected new file remove but extension is not supported', file);
return;
}
if (this.deletedFiles.has(file)) {
debug('Skipping duplicated unlink event.');
return;
}
debug('Detected new file remove', file);
this.deletedFiles.add(file);
updateFilesChange(this.compiler, { deletedFiles: [file] });
this.watcher?._onRemove(dirToWatch, file, 'rename');
});
this.dirsWatchers.set(dirToWatch, dirWatcher);
});
this.paused = false;
return {
...standardWatcher,
close: () => {
clearFilesChange(this.compiler);
if (standardWatcher) {
standardWatcher.close();
}
this.dirsWatchers.forEach((dirWatcher) => {
dirWatcher?.close();
});
this.dirsWatchers.clear();
this.paused = true;
},
pause: () => {
if (standardWatcher) {
standardWatcher.pause();
}
this.paused = true;
},
};
};
}
export { InclusiveNodeWatchFileSystem };