blob: b2b4b4380a359c6945d14d748e203e77b83edc34 [file] [log] [blame]
/*!
* write <https://github.com/jonschlinkert/write>
*
* Copyright (c) 2014-2017, Jon Schlinkert.
* Released under the MIT License.
*/
'use strict';
var fs = require('fs');
var path = require('path');
var mkdirp = require('mkdirp');
/**
* Asynchronously writes data to a file, replacing the file if it already
* exists and creating any intermediate directories if they don't already
* exist. Data can be a string or a buffer. Returns a promise if a callback
* function is not passed.
*
* ```js
* var writeFile = require('write');
* writeFile('foo.txt', 'This is content...', function(err) {
* if (err) console.log(err);
* });
*
* // promise
* writeFile('foo.txt', 'This is content...')
* .then(function() {
* // do stuff
* });
* ```
* @name writeFile
* @param {string|Buffer|integer} `filepath` filepath or file descriptor.
* @param {string|Buffer|Uint8Array} `data` String to write to disk.
* @param {object} `options` Options to pass to [fs.writeFile][fs]{#fs_fs_writefile_file_data_options_callback} and/or [mkdirp][]
* @param {Function} `callback` (optional) If no callback is provided, a promise is returned.
* @api public
*/
function writeFile(filepath, data, options, cb) {
if (typeof options === 'function') {
cb = options;
options = {};
}
if (typeof cb !== 'function') {
return writeFile.promise.apply(null, arguments);
}
if (typeof filepath !== 'string') {
cb(new TypeError('expected filepath to be a string'));
return;
}
mkdirp(path.dirname(filepath), options, function(err) {
if (err) {
cb(err);
return;
}
fs.writeFile(filepath, data, options, cb);
});
};
/**
* The promise version of [writeFile](#writefile). Returns a promise.
*
* ```js
* var writeFile = require('write');
* writeFile.promise('foo.txt', 'This is content...')
* .then(function() {
* // do stuff
* });
* ```
* @name .promise
* @param {string|Buffer|integer} `filepath` filepath or file descriptor.
* @param {string|Buffer|Uint8Array} `val` String or buffer to write to disk.
* @param {object} `options` Options to pass to [fs.writeFile][fs]{#fs_fs_writefile_file_data_options_callback} and/or [mkdirp][]
* @return {Promise}
* @api public
*/
writeFile.promise = function(filepath, val, options) {
if (typeof filepath !== 'string') {
return Promise.reject(new TypeError('expected filepath to be a string'));
}
return new Promise(function(resolve, reject) {
mkdirp(path.dirname(filepath), options, function(err) {
if (err) {
reject(err);
return;
}
fs.writeFile(filepath, val, options, function(err) {
if (err) {
reject(err);
return;
}
resolve(val);
});
});
});
};
/**
* The synchronous version of [writeFile](#writefile). Returns undefined.
*
* ```js
* var writeFile = require('write');
* writeFile.sync('foo.txt', 'This is content...');
* ```
* @name .sync
* @param {string|Buffer|integer} `filepath` filepath or file descriptor.
* @param {string|Buffer|Uint8Array} `data` String or buffer to write to disk.
* @param {object} `options` Options to pass to [fs.writeFileSync][fs]{#fs_fs_writefilesync_file_data_options} and/or [mkdirp][]
* @return {undefined}
* @api public
*/
writeFile.sync = function(filepath, data, options) {
if (typeof filepath !== 'string') {
throw new TypeError('expected filepath to be a string');
}
mkdirp.sync(path.dirname(filepath), options);
fs.writeFileSync(filepath, data, options);
};
/**
* Uses `fs.createWriteStream` to write data to a file, replacing the
* file if it already exists and creating any intermediate directories
* if they don't already exist. Data can be a string or a buffer. Returns
* a new [WriteStream](https://nodejs.org/api/fs.html#fs_class_fs_writestream)
* object.
*
* ```js
* var fs = require('fs');
* var writeFile = require('write');
* fs.createReadStream('README.md')
* .pipe(writeFile.stream('a/b/c/other-file.md'))
* .on('close', function() {
* // do stuff
* });
* ```
* @name .stream
* @param {string|Buffer|integer} `filepath` filepath or file descriptor.
* @param {object} `options` Options to pass to [mkdirp][] and [fs.createWriteStream][fs]{#fs_fs_createwritestream_path_options}
* @return {Stream} Returns a new [WriteStream](https://nodejs.org/api/fs.html#fs_class_fs_writestream) object. (See [Writable Stream](https://nodejs.org/api/stream.html#stream_class_stream_writable)).
* @api public
*/
writeFile.stream = function(filepath, options) {
mkdirp.sync(path.dirname(filepath), options);
return fs.createWriteStream(filepath, options);
};
/**
* Expose `writeFile`
*/
module.exports = writeFile;