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chore(polyfills): Start moving Node.js code into polyfills (#2669)
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modules/loader-utils/src/lib/filesystems/node-filesystem.browser.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| import {FileSystem, RandomAccessReadFileSystem} from '@loaders.gl/loader-utils'; | ||
| import fs from 'fs'; | ||
| import fsPromise from 'fs/promises'; | ||
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| // import {fetchFile} from "../fetch/fetch-file" | ||
| // import {selectLoader} from "../api/select-loader"; | ||
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| type Stat = { | ||
| size: number; | ||
| isDirectory: () => boolean; | ||
| info?: fs.Stats; | ||
| }; | ||
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| type ReadOptions = { | ||
| buffer?: Buffer; | ||
| offset?: number; | ||
| length?: number; | ||
| position?: number; | ||
| }; | ||
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| /** | ||
| * FileSystem pass-through for Node.js | ||
| * Compatible with BrowserFileSystem. | ||
| * @param options | ||
| */ | ||
| export class NodeFileSystem implements FileSystem, RandomAccessReadFileSystem { | ||
| // implements FileSystem | ||
| constructor(options: {[key: string]: any}) { | ||
| this.fetch = options._fetch; | ||
| } | ||
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| async readdir(dirname = '.', options?: {}): Promise<any[]> { | ||
| return await fsPromise.readdir(dirname, options); | ||
| } | ||
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| async stat(path: string, options?: {}): Promise<Stat> { | ||
| const info = await fsPromise.stat(path, options); | ||
| return {size: Number(info.size), isDirectory: () => false, info}; | ||
| } | ||
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| async fetch(path: string, options: {[key: string]: any}) { | ||
| // Falls back to handle https:/http:/data: etc fetches | ||
| // eslint-disable-next-line | ||
| const fallbackFetch = options.fetch || this.fetch; | ||
| return fallbackFetch(path, options); | ||
| } | ||
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| // implements IRandomAccessFileSystem | ||
| async open(path: string, flags: string | number, mode?: any): Promise<number> { | ||
| return (await fsPromise.open(path, flags)) as unknown as number; | ||
| } | ||
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| async close(fd: number): Promise<void> { | ||
| fs.close(fd); | ||
| } | ||
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| async fstat(fd: number): Promise<Stat> { | ||
| return await new Promise((resolve, reject) => | ||
| fs.fstat(fd, (err, info) => (err ? reject(err) : resolve(info))) | ||
| ); | ||
| } | ||
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| async read( | ||
| fd: number, | ||
| // @ts-ignore Possibly null | ||
| {buffer = null, offset = 0, length = buffer.byteLength, position = null}: ReadOptions | ||
| ): Promise<{bytesRead: number; buffer: Uint8Array}> { | ||
| let totalBytesRead = 0; | ||
| // Read in loop until we get required number of bytes | ||
| while (totalBytesRead < length) { | ||
| const {bytesRead} = await new Promise<{bytesRead: number; buffer: Buffer}>( | ||
| // eslint-disable-next-line no-loop-func | ||
| (resolve, reject) => | ||
| fs.read( | ||
| fd, | ||
| buffer, | ||
| offset + totalBytesRead, | ||
| length - totalBytesRead, | ||
| position + totalBytesRead, | ||
| (err, bytesRead, buffer) => (err ? reject(err) : resolve({bytesRead, buffer})) | ||
| ) | ||
| ); | ||
| totalBytesRead += bytesRead; | ||
| } | ||
| return {bytesRead: totalBytesRead, buffer}; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // loaders.gl, MIT License | ||
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| import {allSettled} from './promise/all-settled'; | ||
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| if (!('allSettled' in Promise)) { | ||
| // @ts-ignore | ||
| Promise.allSettled = allSettled; | ||
| } | ||
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| // eslint-disable-next-line @typescript-eslint/no-empty-function | ||
| export function installFilePolyfills() {} | ||
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| // Dummy export to avoid import errors in browser tests | ||
| export const NodeFileSystem = null; |
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