https://github.com/joehand/hyperdrive-duplicate

check if a file is a duplicate to a hyperdrive entry
https://github.com/joehand/hyperdrive-duplicate

Last synced: 3 months ago
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check if a file is a duplicate to a hyperdrive entry

• Host: GitHub
• URL: https://github.com/joehand/hyperdrive-duplicate
• Owner: joehand
• License: mit
• Created: 2016-11-08T01:18:13.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2017-11-30T19:46:14.000Z (over 7 years ago)
• Last Synced: 2025-03-23T22:13:24.813Z (4 months ago)
• Language: JavaScript
• Size: 12.7 KB
• Stars: 2
• Watchers: 1
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-dat - hyperdrive-duplicate - check if a file is a duplicate to a hyperdrive archive entry (Outdated / Other Related Dat Project Modules)

README

        
# hyperdrive-duplicate

[![Travis](https://img.shields.io/travis/joehand/hyperdrive-duplicate.svg?style=flat-square)](https://travis-ci.org/joehand/hyperdrive-duplicate) [![npm](https://img.shields.io/npm/v/hyperdrive-duplicate.svg?style=flat-square)](https://npmjs.org/package/hyperdrive-duplicate)

Check if a file on the filesystem is the same as an entry in hyperdrive by comparing `stat` objects and file contents.

* Compare `archive.stat` and `fs.stat` first, then

* Compare `archive.createReadStream` and `fs.createReadStream` (will fail as soon as stream differs).

**Warning! Can be decrease performance to check duplicates of many large files.**

## Usage

```js

var isDuplicate = require('hyperdrive-duplicate')

var archive = hyperdrive(ram)

archive.writeFile('example.js', fs.readFileSync('example.js'), function (err) {

  if (err) throw err

  // example.js is now in the archive

  // we can see if the fs file is duplicate

  isDuplicate(archive, 'example.js', function (err, duplicate) {

    if (err) throw err

    if (duplicate) console.log('example.js is duplicate!')

  })

  isDuplicate(archive, 'index.js', 'example.js', function (err, duplicate) {

    // index.js is a file on our fs

    // example.js is the file in our archive

    if (err) throw err

    if (duplicate) console.log('index.js not a duplicate of example.js!')

  })

})

```

## API

### isDuplicate(archive, filePath, [entryName], cb)

Callback returns `(err, isDuplicate)` where `isDuplicate` is a boolean, true if the file is a duplicate.

If `filePath` is different from the entry name in hyperdrive, specify both.

## License

MIT