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# fs-write-stream-atomic Like `fs.createWriteStream(...)`, but atomic. Writes to a tmp file and does an atomic `fs.rename` to move it into place when it's done. First rule of debugging: **It's always a race condition.** ## USAGE ```javascript var fsWriteStreamAtomic = require('fs-write-stream-atomic') // options are optional. var write = fsWriteStreamAtomic('output.txt', options) var read = fs.createReadStream('input.txt') read.pipe(write) // When the write stream emits a 'finish' or 'close' event, // you can be sure that it is moved into place, and contains // all the bytes that were written to it, even if something else // was writing to `output.txt` at the same time. ``` ### `fsWriteStreamAtomic(filename, [options])` * `filename` {String} The file we want to write to * `options` {Object} * `chown` {Object} User and group to set ownership after write * `uid` {Number} * `gid` {Number} * `encoding` {String} default = 'utf8' * `mode` {Number} default = `0666` * `flags` {String} default = `'w'`