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