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| author | ruki <waruqi@gmail.com> | 2018-11-08 00:38:48 +0800 |
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| committer | ruki <waruqi@gmail.com> | 2018-11-07 21:53:09 +0800 |
| commit | 26105034da4fcce7ac883c899d781f016559310d (patch) | |
| tree | c459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/write-file-atomic/README.md | |
| parent | 2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff) | |
| download | xmake-docs-26105034da4fcce7ac883c899d781f016559310d.tar.gz xmake-docs-26105034da4fcce7ac883c899d781f016559310d.zip | |
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| -rw-r--r-- | node_modules/write-file-atomic/README.md | 49 |
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diff --git a/node_modules/write-file-atomic/README.md b/node_modules/write-file-atomic/README.md new file mode 100644 index 00000000..af385f3b --- /dev/null +++ b/node_modules/write-file-atomic/README.md @@ -0,0 +1,49 @@ +write-file-atomic +----------------- + +This is an extension for node's `fs.writeFile` that makes its operation +atomic and allows you set ownership (uid/gid of the file). + +### var writeFileAtomic = require('write-file-atomic')<br>writeFileAtomic(filename, data, [options], callback) + +* filename **String** +* data **String** | **Buffer** +* options **Object** + * chown **Object** + * uid **Number** + * gid **Number** + * encoding **String** | **Null** default = 'utf8' + * fsync **Boolean** default = true + * mode **Number** default = 438 (aka 0666 in Octal) + * Promise **Object** default = native Promise object +callback **Function** + +Atomically and asynchronously writes data to a file, replacing the file if it already +exists. data can be a string or a buffer. + +The file is initially named `filename + "." + murmurhex(__filename, process.pid, ++invocations)`. +If writeFile completes successfully then, if passed the **chown** option it will change +the ownership of the file. Finally it renames the file back to the filename you specified. If +it encounters errors at any of these steps it will attempt to unlink the temporary file and then +pass the error back to the caller. +If multiple writes are concurrently issued to the same file, the write operations are put into a queue and serialized in the order they were called, using Promises. Native promises are used by default, but you can inject your own promise-like object with the **Promise** option. Writes to different files are still executed in parallel. + +If provided, the **chown** option requires both **uid** and **gid** properties or else +you'll get an error. + +The **encoding** option is ignored if **data** is a buffer. It defaults to 'utf8'. + +If the **fsync** option is **false**, writeFile will skip the final fsync call. + +Example: + +```javascript +writeFileAtomic('message.txt', 'Hello Node', {chown:{uid:100,gid:50}}, function (err) { + if (err) throw err; + console.log('It\'s saved!'); +}); +``` + +### var writeFileAtomicSync = require('write-file-atomic').sync<br>writeFileAtomicSync(filename, data, [options]) + +The synchronous version of **writeFileAtomic**. |
