30 lines
650 B
TypeScript
30 lines
650 B
TypeScript
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import { FileSystem } from './types';
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export function createFileSystem(fs?: any): FileSystem {
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let requireFsError = ''
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if (!fs) {
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try {
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fs = require('fs')
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} catch (err) {
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requireFsError = err.toString()
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}
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}
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const readFile = fs
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? function(filePath: string) {
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return new Promise<Buffer>((res, rej) => {
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fs.readFile(filePath, function(err: any, buffer: Buffer) {
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return err ? rej(err) : res(buffer)
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})
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})
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}
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: function() {
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throw new Error(`readFile - failed to require fs in nodejs environment with error: ${requireFsError}`)
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}
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return {
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readFile
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}
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}
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