f29f525c77
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35 lines
1.2 KiB
Markdown
35 lines
1.2 KiB
Markdown
unique-filename
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===============
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Generate a unique filename for use in temporary directories or caches.
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```js
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const uniqueFilename = require('unique-filename')
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// returns something like: '/tmp/c5b28f47'
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const randomTmpfile = uniqueFilename(os.tmpdir())
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// returns something like: '/tmp/my-test-51a7b48d'
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const randomPrefixedTmpfile = uniqueFilename(os.tmpdir(), 'my-test')
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// returns something like: '/my-tmp-dir/testing-7ddd44c0'
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const uniqueTmpfile = uniqueFilename('/my-tmp-dir', 'testing', '/my/thing/to/uniq/on')
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```
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### uniqueFilename(*dir*, *fileprefix*, *uniqstr*) → String
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Returns the full path of a unique filename that looks like:
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`dir/prefix-7ddd44c0`
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or `dir/7ddd44c0`
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*dir* – The path you want the filename in. `os.tmpdir()` is a good choice for this.
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*fileprefix* – A string to append prior to the unique part of the filename.
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The parameter is required if *uniqstr* is also passed in but is otherwise
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optional and can be `undefined`/`null`/`''`. If present and not empty
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then this string plus a hyphen are prepended to the unique part.
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*uniqstr* – Optional, if not passed the unique part of the resulting
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filename will be random. If passed in it will be generated from this string
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in a reproducible way.
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