var _fs
|
try {
|
_fs = require('graceful-fs')
|
} catch (_) {
|
_fs = require('fs')
|
}
|
|
function readFile (file, options, callback) {
|
if (callback == null) {
|
callback = options
|
options = {}
|
}
|
|
if (typeof options === 'string') {
|
options = {encoding: options}
|
}
|
|
options = options || {}
|
var fs = options.fs || _fs
|
|
var shouldThrow = true
|
if ('throws' in options) {
|
shouldThrow = options.throws
|
}
|
|
fs.readFile(file, options, function (err, data) {
|
if (err) return callback(err)
|
|
data = stripBom(data)
|
|
var obj
|
try {
|
obj = JSON.parse(data, options ? options.reviver : null)
|
} catch (err2) {
|
if (shouldThrow) {
|
err2.message = file + ': ' + err2.message
|
return callback(err2)
|
} else {
|
return callback(null, null)
|
}
|
}
|
|
callback(null, obj)
|
})
|
}
|
|
function readFileSync (file, options) {
|
options = options || {}
|
if (typeof options === 'string') {
|
options = {encoding: options}
|
}
|
|
var fs = options.fs || _fs
|
|
var shouldThrow = true
|
if ('throws' in options) {
|
shouldThrow = options.throws
|
}
|
|
try {
|
var 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
|
}
|
}
|
}
|
|
function stringify (obj, options) {
|
var spaces
|
var EOL = '\n'
|
if (typeof options === 'object' && options !== null) {
|
if (options.spaces) {
|
spaces = options.spaces
|
}
|
if (options.EOL) {
|
EOL = options.EOL
|
}
|
}
|
|
var str = JSON.stringify(obj, options ? options.replacer : null, spaces)
|
|
return str.replace(/\n/g, EOL) + EOL
|
}
|
|
function writeFile (file, obj, options, callback) {
|
if (callback == null) {
|
callback = options
|
options = {}
|
}
|
options = options || {}
|
var fs = options.fs || _fs
|
|
var str = ''
|
try {
|
str = stringify(obj, options)
|
} catch (err) {
|
// Need to return whether a callback was passed or not
|
if (callback) callback(err, null)
|
return
|
}
|
|
fs.writeFile(file, str, options, callback)
|
}
|
|
function writeFileSync (file, obj, options) {
|
options = options || {}
|
var fs = options.fs || _fs
|
|
var str = stringify(obj, options)
|
// not sure if fs.writeFileSync returns anything, but just in case
|
return fs.writeFileSync(file, str, options)
|
}
|
|
function stripBom (content) {
|
// we do this because JSON.parse would convert it to a utf8 string if encoding wasn't specified
|
if (Buffer.isBuffer(content)) content = content.toString('utf8')
|
content = content.replace(/^\uFEFF/, '')
|
return content
|
}
|
|
var jsonfile = {
|
readFile: readFile,
|
readFileSync: readFileSync,
|
writeFile: writeFile,
|
writeFileSync: writeFileSync
|
}
|
|
module.exports = jsonfile
|
