dcli
  • Introduction
  • What does DCli do?
  • Install DCli
    • Installing on Windows
  • Writing your first CLI app
  • Add DCli to your project
  • pub.dev
  • github
  • Dart basics
    • Dart lambda functions
    • Function Arguments
    • Futures
    • stdin/stdout/stderr a primer
  • Tour
    • Overview
    • Using DCli functions
    • User input
      • Ask Validators
    • Displaying information
    • Managing Files And Directories
    • Environment variables
    • Calling apps
    • Redirecting output
    • Command Line Arguments
    • Paths
    • Glob Expansion
    • Piping
    • Locking
    • Fetch
    • The evils of CD
    • Assets/Resources
    • Cross Platform
      • Posix
      • Windows
      • Docker
        • Detecting Docker
        • Add DCli to a Docker Container
        • Example DCli app in Docker
  • Elevated Privileges
    • Sudo
  • Performance
  • Dependency Management
    • Dependency Management
    • Pubspec Managment
  • DCli Tools
    • DCli tools
    • Use a shebang #!
    • DCli Compile
    • DCli Clean
    • DCli Create
    • DCli Doctor
    • DCli Install
    • DCli Run
    • DCli Warmup
    • DCli Pack
    • Upgrade DCli
  • Internal Workings
    • Internal Workings
    • waitForEx
  • Contributing
    • Creating a release
    • Running Unit tests
    • Implemention support for a shell
    • Templates
  • References
  • Examples
    • Projects
    • Code
      • hello world.
      • dcompress
      • dpath
      • dmysql
      • dshell
      • dwhich
      • dipaddr
      • gnome launcher
  • Articles
    • build CLI apps in dart - part 1
    • build CLI apps in dart - part 2
    • Dealing with permissions
    • 3rd Party console packages
  • Dart on Linux - the perfect CLI tooling
  • Improving your build environment
    • Existing tooling
    • Building with Dart
    • A home for your build tools
  • Olivier Revial - CLI apps made easy
  • Video: package of the week
Powered by GitBook
On this page

Was this helpful?

  1. Tour

Piping

PreviousGlob ExpansionNextLocking

Last updated 1 year ago

Was this helpful?

Piping

For complete API documentation refer to:

Now let's pipe the output of one cli command to another.

('grep import *.dart' | 'head -n 5').forEach((line) => print(line)) ;

The above command launches 'grep' and 'head' to find all import lines in any Dart file and then trim the list (via head) to the first five lines and finally print those lines.

Note: when you use pipe you MUST surround the pipe commands with parentheses () due to a precedence issue. In the above example note the parentheses just before the .forEach and the matching one at the start of the line.

What we have now is the power of Bash and the elegance of Dart.

pub.dev