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
|
