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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
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