index.js•1.9 kB
let _fs
try {
_fs = require('graceful-fs')
} catch (_) {
_fs = require('fs')
}
const universalify = require('universalify')
const { stringify, stripBom } = require('./utils')
async function _readFile (file, options = {}) {
if (typeof options === 'string') {
options = { encoding: options }
}
const fs = options.fs || _fs
const shouldThrow = 'throws' in options ? options.throws : true
let data = await universalify.fromCallback(fs.readFile)(file, options)
data = stripBom(data)
let obj
try {
obj = JSON.parse(data, options ? options.reviver : null)
} catch (err) {
if (shouldThrow) {
err.message = `${file}: ${err.message}`
throw err
} else {
return null
}
}
return obj
}
const readFile = universalify.fromPromise(_readFile)
function readFileSync (file, options = {}) {
if (typeof options === 'string') {
options = { encoding: options }
}
const fs = options.fs || _fs
const shouldThrow = 'throws' in options ? options.throws : true
try {
let content = fs.readFileSync(file, options)
content = stripBom(content)
return JSON.parse(content, options.reviver)
} catch (err) {
if (shouldThrow) {
err.message = `${file}: ${err.message}`
throw err
} else {
return null
}
}
}
async function _writeFile (file, obj, options = {}) {
const fs = options.fs || _fs
const str = stringify(obj, options)
await universalify.fromCallback(fs.writeFile)(file, str, options)
}
const writeFile = universalify.fromPromise(_writeFile)
function writeFileSync (file, obj, options = {}) {
const fs = options.fs || _fs
const str = stringify(obj, options)
// not sure if fs.writeFileSync returns anything, but just in case
return fs.writeFileSync(file, str, options)
}
const jsonfile = {
readFile,
readFileSync,
writeFile,
writeFileSync
}
module.exports = jsonfile