mirror of
https://github.com/JamesIves/github-pages-deploy-action.git
synced 2023-12-15 20:03:39 +08:00
315 lines
9.1 KiB
Markdown
315 lines
9.1 KiB
Markdown
# Tmp
|
|
|
|
A simple temporary file and directory creator for [node.js.][1]
|
|
|
|
[](https://travis-ci.org/raszi/node-tmp)
|
|
[](https://david-dm.org/raszi/node-tmp)
|
|
[](https://badge.fury.io/js/tmp)
|
|
[](https://raszi.github.io/node-tmp/)
|
|
[](https://snyk.io/test/npm/tmp)
|
|
|
|
## About
|
|
|
|
This is a [widely used library][2] to create temporary files and directories
|
|
in a [node.js][1] environment.
|
|
|
|
Tmp offers both an asynchronous and a synchronous API. For all API calls, all
|
|
the parameters are optional. There also exists a promisified version of the
|
|
API, see (5) under references below.
|
|
|
|
Tmp uses crypto for determining random file names, or, when using templates,
|
|
a six letter random identifier. And just in case that you do not have that much
|
|
entropy left on your system, Tmp will fall back to pseudo random numbers.
|
|
|
|
You can set whether you want to remove the temporary file on process exit or
|
|
not, and the destination directory can also be set.
|
|
|
|
## How to install
|
|
|
|
```bash
|
|
npm install tmp
|
|
```
|
|
|
|
## Usage
|
|
|
|
Please also check [API docs][4].
|
|
|
|
### Asynchronous file creation
|
|
|
|
Simple temporary file creation, the file will be closed and unlinked on process exit.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.file(function _tempFileCreated(err, path, fd, cleanupCallback) {
|
|
if (err) throw err;
|
|
|
|
console.log('File: ', path);
|
|
console.log('Filedescriptor: ', fd);
|
|
|
|
// If we don't need the file anymore we could manually call the cleanupCallback
|
|
// But that is not necessary if we didn't pass the keep option because the library
|
|
// will clean after itself.
|
|
cleanupCallback();
|
|
});
|
|
```
|
|
|
|
### Synchronous file creation
|
|
|
|
A synchronous version of the above.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
var tmpobj = tmp.fileSync();
|
|
console.log('File: ', tmpobj.name);
|
|
console.log('Filedescriptor: ', tmpobj.fd);
|
|
|
|
// If we don't need the file anymore we could manually call the removeCallback
|
|
// But that is not necessary if we didn't pass the keep option because the library
|
|
// will clean after itself.
|
|
tmpobj.removeCallback();
|
|
```
|
|
|
|
Note that this might throw an exception if either the maximum limit of retries
|
|
for creating a temporary name fails, or, in case that you do not have the permission
|
|
to write to the directory where the temporary file should be created in.
|
|
|
|
### Asynchronous directory creation
|
|
|
|
Simple temporary directory creation, it will be removed on process exit.
|
|
|
|
If the directory still contains items on process exit, then it won't be removed.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.dir(function _tempDirCreated(err, path, cleanupCallback) {
|
|
if (err) throw err;
|
|
|
|
console.log('Dir: ', path);
|
|
|
|
// Manual cleanup
|
|
cleanupCallback();
|
|
});
|
|
```
|
|
|
|
If you want to cleanup the directory even when there are entries in it, then
|
|
you can pass the `unsafeCleanup` option when creating it.
|
|
|
|
### Synchronous directory creation
|
|
|
|
A synchronous version of the above.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
var tmpobj = tmp.dirSync();
|
|
console.log('Dir: ', tmpobj.name);
|
|
// Manual cleanup
|
|
tmpobj.removeCallback();
|
|
```
|
|
|
|
Note that this might throw an exception if either the maximum limit of retries
|
|
for creating a temporary name fails, or, in case that you do not have the permission
|
|
to write to the directory where the temporary directory should be created in.
|
|
|
|
### Asynchronous filename generation
|
|
|
|
It is possible with this library to generate a unique filename in the specified
|
|
directory.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.tmpName(function _tempNameGenerated(err, path) {
|
|
if (err) throw err;
|
|
|
|
console.log('Created temporary filename: ', path);
|
|
});
|
|
```
|
|
|
|
### Synchronous filename generation
|
|
|
|
A synchronous version of the above.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
var name = tmp.tmpNameSync();
|
|
console.log('Created temporary filename: ', name);
|
|
```
|
|
|
|
## Advanced usage
|
|
|
|
### Asynchronous file creation
|
|
|
|
Creates a file with mode `0644`, prefix will be `prefix-` and postfix will be `.txt`.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.file({ mode: 0644, prefix: 'prefix-', postfix: '.txt' }, function _tempFileCreated(err, path, fd) {
|
|
if (err) throw err;
|
|
|
|
console.log('File: ', path);
|
|
console.log('Filedescriptor: ', fd);
|
|
});
|
|
```
|
|
|
|
### Synchronous file creation
|
|
|
|
A synchronous version of the above.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
var tmpobj = tmp.fileSync({ mode: 0644, prefix: 'prefix-', postfix: '.txt' });
|
|
console.log('File: ', tmpobj.name);
|
|
console.log('Filedescriptor: ', tmpobj.fd);
|
|
```
|
|
|
|
### Controlling the Descriptor
|
|
|
|
As a side effect of creating a unique file `tmp` gets a file descriptor that is
|
|
returned to the user as the `fd` parameter. The descriptor may be used by the
|
|
application and is closed when the `removeCallback` is invoked.
|
|
|
|
In some use cases the application does not need the descriptor, needs to close it
|
|
without removing the file, or needs to remove the file without closing the
|
|
descriptor. Two options control how the descriptor is managed:
|
|
|
|
* `discardDescriptor` - if `true` causes `tmp` to close the descriptor after the file
|
|
is created. In this case the `fd` parameter is undefined.
|
|
* `detachDescriptor` - if `true` causes `tmp` to return the descriptor in the `fd`
|
|
parameter, but it is the application's responsibility to close it when it is no
|
|
longer needed.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.file({ discardDescriptor: true }, function _tempFileCreated(err, path, fd, cleanupCallback) {
|
|
if (err) throw err;
|
|
// fd will be undefined, allowing application to use fs.createReadStream(path)
|
|
// without holding an unused descriptor open.
|
|
});
|
|
```
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.file({ detachDescriptor: true }, function _tempFileCreated(err, path, fd, cleanupCallback) {
|
|
if (err) throw err;
|
|
|
|
cleanupCallback();
|
|
// Application can store data through fd here; the space used will automatically
|
|
// be reclaimed by the operating system when the descriptor is closed or program
|
|
// terminates.
|
|
});
|
|
```
|
|
|
|
### Asynchronous directory creation
|
|
|
|
Creates a directory with mode `0755`, prefix will be `myTmpDir_`.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.dir({ mode: 0750, prefix: 'myTmpDir_' }, function _tempDirCreated(err, path) {
|
|
if (err) throw err;
|
|
|
|
console.log('Dir: ', path);
|
|
});
|
|
```
|
|
|
|
### Synchronous directory creation
|
|
|
|
Again, a synchronous version of the above.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
var tmpobj = tmp.dirSync({ mode: 0750, prefix: 'myTmpDir_' });
|
|
console.log('Dir: ', tmpobj.name);
|
|
```
|
|
|
|
### mkstemp like, asynchronously
|
|
|
|
Creates a new temporary directory with mode `0700` and filename like `/tmp/tmp-nk2J1u`.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.dir({ template: '/tmp/tmp-XXXXXX' }, function _tempDirCreated(err, path) {
|
|
if (err) throw err;
|
|
|
|
console.log('Dir: ', path);
|
|
});
|
|
```
|
|
|
|
### mkstemp like, synchronously
|
|
|
|
This will behave similarly to the asynchronous version.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
var tmpobj = tmp.dirSync({ template: '/tmp/tmp-XXXXXX' });
|
|
console.log('Dir: ', tmpobj.name);
|
|
```
|
|
|
|
### Asynchronous filename generation
|
|
|
|
The `tmpName()` function accepts the `prefix`, `postfix`, `dir`, etc. parameters also:
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.tmpName({ template: '/tmp/tmp-XXXXXX' }, function _tempNameGenerated(err, path) {
|
|
if (err) throw err;
|
|
|
|
console.log('Created temporary filename: ', path);
|
|
});
|
|
```
|
|
|
|
### Synchronous filename generation
|
|
|
|
The `tmpNameSync()` function works similarly to `tmpName()`.
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
var tmpname = tmp.tmpNameSync({ template: '/tmp/tmp-XXXXXX' });
|
|
console.log('Created temporary filename: ', tmpname);
|
|
```
|
|
|
|
## Graceful cleanup
|
|
|
|
One may want to cleanup the temporary files even when an uncaught exception
|
|
occurs. To enforce this, you can call the `setGracefulCleanup()` method:
|
|
|
|
```javascript
|
|
var tmp = require('tmp');
|
|
|
|
tmp.setGracefulCleanup();
|
|
```
|
|
|
|
## Options
|
|
|
|
All options are optional :)
|
|
|
|
* `mode`: the file mode to create with, it fallbacks to `0600` on file creation and `0700` on directory creation
|
|
* `prefix`: the optional prefix, fallbacks to `tmp-` if not provided
|
|
* `postfix`: the optional postfix, fallbacks to `.tmp` on file creation
|
|
* `template`: [`mkstemp`][3] like filename template, no default
|
|
* `dir`: the optional temporary directory, fallbacks to system default (guesses from environment)
|
|
* `tries`: how many times should the function try to get a unique filename before giving up, default `3`
|
|
* `keep`: signals that the temporary file or directory should not be deleted on exit, default is `false`, means delete
|
|
* Please keep in mind that it is recommended in this case to call the provided `cleanupCallback` function manually.
|
|
* `unsafeCleanup`: recursively removes the created temporary directory, even when it's not empty. default is `false`
|
|
|
|
[1]: http://nodejs.org/
|
|
[2]: https://www.npmjs.com/browse/depended/tmp
|
|
[3]: http://www.kernel.org/doc/man-pages/online/pages/man3/mkstemp.3.html
|
|
[4]: https://raszi.github.io/node-tmp/
|
|
[5]: https://github.com/benjamingr/tmp-promise
|