CommandBox : CLI, Package Manager, REPL & More
5.4.0
5.4.0
  • Introduction
  • About This Book
  • Authors
  • Overview
  • Release History
    • 5.x Versions
      • What's New in 5.4.2
      • What's New in 5.4.1
      • What's New in 5.4.0
      • What's New in 5.3.1
      • What's New in 5.3.0
      • What's New in 5.2.1
      • What's New in 5.2.0
      • What's New in 5.1.1
      • What's New in 5.1.0
      • What's New in 5.0.0
    • 4.x Versions
      • What's new in 4.8.0
      • What's New in 4.7.0
      • What's New in 4.6.0
      • What's New in 4.5.0
      • What's New in 4.4.0
      • What's New in 4.3.0
      • What's New in 4.2.0
      • What's New in 4.1.0
      • What's New in 4.0.0
    • 3.x Versions
      • What's New in 3.9.0
      • What's New in 3.8.0
      • What's New in 3.7.0
      • What's New in 3.6.0
      • What's New in 3.5.0
      • What's New in 3.4.0
      • What's New in 3.3.0
      • What's New in 3.2.0
      • What's New in 3.1.1
      • What's New in 3.0.1
      • What's New in 3.0.0
    • 2.x Versions
      • What's New in 2.2.0
      • What's New in 2.1.1
      • What's New in 2.1.0
      • What's New in 2.0.0
    • 1.x Versions
      • What's in 1.0.0
  • Getting Started Guide
  • Setup
    • Requirements
    • Download
    • Installation
    • Light and Thin Binaries
    • Non-Oracle JREs
    • Upgrading
    • Common Errors
  • Usage
    • Execution
      • Recipes
      • CFML Files
        • Using a DB in CFML scripts
      • OS Binaries
      • CFML Functions
      • Exit Codes
    • Commands
    • Parameters
      • Escaping Special Characters
      • File Paths
      • Globbing Patterns
      • Piping into Commands
      • Expressions
    • Command Help
    • Environment Variables
    • System Settings
    • System Setting Expansion Namespaces
    • Ad-hoc Command Aliases
    • Default Command Parameters
    • REPL
    • Tab Completion
    • Interactive Shell Features
    • forEach Command
    • watch Command
    • jq Command
    • printTable Command
    • sql Command
    • Auto Update Checks
    • Bullet Train Prompt
    • 256 Color Support
    • A Little Fun
  • IDE Integrations
    • Sublime Text
    • Visual Studio Code
  • Config Settings
    • Module Settings
    • Proxy Settings
    • Endpoint Settings
    • Server Settings
    • JSON Settings
    • Misc Settings
    • Task Runner Settings
    • Env Var Overrides
  • Embedded Server
    • Multi-Engine Support
    • Server Versions
    • Start HTML Server
    • Offline Server Starts
    • Debugging Server Starts
    • Server Processes
    • Manage Servers
    • FusionReactor
    • Server Logs
    • Configuring Your Server
      • Server Profiles
      • Server Rules
        • Baked in Rules
        • Allowed Static Files
        • Rule Language
        • Custom Predicates/Handlers
        • Rule Examples
        • Debugging Server Rules
      • JVM Args
      • Server Port and Host
      • SSL Certs
      • HTTPS Redirect/HSTS
      • URL Rewrites
      • Aliases
      • Custom Error Pages
      • Welcome Files
      • Basic Authentication
      • Custom Java Version
      • Adding Custom Libs
      • GZip Compression
      • REST Servlet
      • Performance Tuning
      • Undertow Options
      • Custom Tray Menus
      • Ad-hoc Env Vars
      • server.json Env Var overrides
      • Server Home
      • web.xml Overrides
      • Experimental Features
    • External Web Server
    • Starting as a Service
    • Single Server Mode
    • Server.json
      • Working with server.json
      • Packaging Your Server
      • Using Multiple server.json Files
  • Package Management
    • Installing Packages
      • Installation Path
      • Installation Options
      • Advanced Installation
    • Private Packages
    • System Modules
    • Code Endpoints
      • ForgeBox
      • HTTP(S)
      • File
      • Folder
      • Git
      • Java
      • S3
      • CFLib
      • Jar (via HTTP)
      • Lex (via HTTP or File)
      • Gist
    • Package Scripts
    • Dependencies
    • Semantic Versioning
    • Updating Packages
    • Creating Packages
      • Editing Package Properties
      • Publishing Lucee Extensions to ForgeBox
    • Artifacts
    • Box.json
      • Basic Package Data
      • Extended Package Data
      • Package URLs
      • Installation
      • Embedded Server
      • Dependencies
      • TestBox
    • Managing Version
  • Task Runners
    • Task Anatomy
    • BaseTask Super Class
    • Task Target Dependencies
    • Passing Parameters
    • Using Parameters
    • Task Output
      • Printing tables
    • Lifecycle Events
    • Threading/Async
    • Task Interactivity
    • Shell Integration
    • Downloading Files
    • Running Other Commands
    • Error Handling
    • Hitting Your Database
    • Sending E-mail
    • Interactive Jobs
    • Watchers
    • Property Files
    • Running other Tasks
    • Loading Ad hoc Jars
    • Loading Ad-hoc Modules
    • Cancel Long Tasks
    • Progress Bar
    • Caching Task Runners
  • Helpful Commands
    • Token Replacements
    • Checksums
    • Code Quality Tools
    • ask and confirm
  • Deploying CommandBox
    • Github Actions
    • Docker
    • Heroku
    • Amazon Lightsail
  • TestBox Integration
    • Test Runner
    • Test Watcher
  • Developing For CommandBox
    • Modules
      • Installation and Locations
      • Configuration
        • Public Properties
        • Configure() Method
        • Lifecycle Methods
      • Conventions
      • User Settings
      • Linking Modules
    • Commands
      • Aliases
      • Using Parameters
        • Using File Globs
        • Dynamic Parameters
      • Command Output
      • Tab Completion & Help
      • Interactivity
      • Watchers
      • Shell integration
      • Running Other Commands
      • Error handling
      • Watchers
      • Loading Ad hoc Jars
    • Interceptors
      • Core Interception Points
        • CLI Lifecycle
        • Command Execution Lifecycle
        • Module Lifecycle
        • Server Lifecycle
        • Error Handling
        • Package Lifecycle
      • Custom Interception Points
    • Injection DSL
    • Example Project
    • FusionReactor for the CLI
  • ForgeBox Enterprise
    • Introduction
    • Storage
    • Commands
      • List
      • Register
      • Login
      • Set Default
      • Remove
    • Usage
Powered by GitBook
On this page

Was this helpful?

Edit on Git
Export as PDF
  1. Developing For CommandBox
  2. Commands

Watchers

CommandBox has a powerful utility that can be used to watch a folder of files for changes and fire arbitrary code when changes happen. The utility will block execution of the command until the user stops it with Ctrl+C. To use a watcher in your command, there is a method called watch() in the base command class that you can call. It has a nice DSL of chainable methods to configure it.

watch()
    .paths( '**.cfc' )
    .inDirectory( getCWD() )
    .withDelay( 5000 )
    .onChange( function() {

        print.line( 'Something changed!' );
        command( 'testbox run' )
            .run();

    } )
    .start();

Here's a rundown of the methods used above in the DSL.

  • paths( ... ) - Receives a comma-delimited list of globbing patterns to watch for changes. (defaults to **) Note that the "paths" here work more like .gitignore entries and less like bash paths. Specifically:

    • A path with a leading slash (or backslash), will be evaluated relative to the current working directory. E.g. watch /foo will only watch files in the directory at ./foo, but not in directories like ./bar/foo.

    • A path without a leading slash (or backslash) will be applied as a glob filter to all files within the current working directory. E.g. watch foo will result in the entire working directory being watched, but only files matching the glob **foo will be processed.

      If your watcher seems slow, unresponsive, or is failing to notice some file change events, it is likely that you have it watching too many files. Try specifying more specific paths to the files you want to process, and use leading slashes in your arguments to avoid watching all files in the current working directory.

  • inDirectory( ... ) - Set the base directory that the file globs are relative to. (defaults to current working directory)

  • withDelay( ... ) - Set the number of milliseconds between polling the file system. (defaults to 500 ms)

  • onChange( ... ) - Pass a closure to be executed when a change has occurred.

  • start() - Starts the watcher. Always call this at the end of the DSL chain

PreviousError handlingNextLoading Ad hoc Jars

Last updated 3 years ago

Was this helpful?