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watchr

4.0.1 • Public • Published

watchr

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Watchr provides a normalised API the file watching APIs of different node versions, nested/recursive file and directory watching, and accurate detailed events for file/directory creations, updates, and deletions.

Install

NPM

  • Install: npm install --save watchr
  • Module: require('watchr')
  • Editions

    This package is published with the following editions:

    Older environments may need Babel's Polyfill or something similar.

    Usage

    API Documentation

    There are two concepts in watchr, they are:

    • Watcher - this wraps the native file system watching, makes it reliable, and supports deep watching
    • Stalker - this wraps the watcher, such that for any given path, there can be many stalkers, but only one watcher

    The simplest usage is:

    // Import the watching library
    var watchr = require('watchr')
     
    // Define our watching parameters
    var path = process.cwd()
    function listener (changeType, fullPath, currentStat, previousStat) {
        switch ( changeType ) {
            case 'update':
                console.log('the file', fullPath, 'was updated', currentStat, previousStat)
                break
            case 'create':
                console.log('the file', fullPath, 'was created', currentStat)
                break
            case 'delete':
                console.log('the file', fullPath, 'was deleted', previousStat)
                break
        }
    }
    function next (err) {
        if ( err )  return console.log('watch failed on', path, 'with error', err)
        console.log('watch successful on', path)
    }
     
    // Watch the path with the change listener and completion callback
    var stalker = watchr.open(path, listener, next)
     
    // Close the stalker of the watcher
    stalker.close()

    More advanced usage is:

    // Create the stalker for the path
    var stalker = watchr.create(path)
     
    // Listen to the events for the stalker/watcher
    // http://rawgit.com/bevry/watchr/master/docs/index.html#watcher
    stalker.on('change', listener)
    stalker.on('log', console.log)
    stalker.once('close', function (reason) {
        console.log('closed', path, 'because', reason)
        stalker.removeAllListeners()  // as it is closed, no need for our change or log listeners any more
    })
     
    // Set the default configuration for the stalker/watcher
    // http://rawgit.com/bevry/watchr/master/docs/index.html#Watcher%23setConfig
    stalker.setConfig({
        stat: null,
        interval: 5007,
        persistent: true,
        catchupDelay: 2000,
        preferredMethods: ['watch', 'watchFile'],
        followLinks: true,
        ignorePaths: false,
        ignoreHiddenFiles: false,
        ignoreCommonPatterns: true,
        ignoreCustomPatterns: null
    })
     
    // Start watching
    stalker.watch(next)
     
    // Stop watching
    stalker.close()

    History

    Discover the release history by heading on over to the HISTORY.md file.

    Contribute

    Discover how you can contribute by heading on over to the CONTRIBUTING.md file.

    Backers

    Maintainers

    These amazing people are maintaining this project:

    Sponsors

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    Patreon donate button Open Collective donate button Gratipay donate button Flattr donate button PayPal donate button Bitcoin donate button Wishlist browse button

    Contributors

    These amazing people have contributed code to this project:

    Discover how you can contribute by heading on over to the CONTRIBUTING.md file.

    License

    Unless stated otherwise all works are:

    and licensed under:

    install

    npm i watchr

    Downloadsweekly downloads

    73,058

    version

    4.0.1

    license

    MIT

    repository

    githubgithub

    last publish

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