NAME

       yarnpkg - Fast, reliable and secure npm alternative

SYNOPSIS

       yarnpkg command [package]@[version]

DESCRIPTION

       Fast:  Yarnpkg  caches  every  package  it  downloads  so  it  never needs to again. It also parallelizes
       operations to maximize resource utilization so install times are faster than ever.

       Reliable: Using a detailed, but concise, lockfile format, and a  deterministic  algorithm  for  installs,
       Yarnpkg  is able to guarantee that an install that worked on one system will work exactly the same way on
       any other system.

       Secure: Yarnpkg uses checksums to verify the integrity of every installed  package  before  its  code  is
       executed.

EXAMPLES

       Here are some of the most common commands you’ll need.

       Starting a new project

         yarn init

       Adding a dependency

         yarn add [package]
         yarn add [package]@[version]
         yarn add [package]@[tag]

       Updating a dependency

         yarn upgrade [package]
         yarn upgrade [package]@[version]
         yarn upgrade [package]@[tag]

       Removing a dependency

         yarn remove [package]

       Installing all the dependencies of project

         yarn

       or

         yarn install

COMMANDS

       Yarn  provides a rich set of command-line commands to help you with various aspects of your Yarn package,
       including installation, administration, publishing, etc.

       Some of the more popular commands are:

       • yarn add: adds a package to use in your current package.

       • yarn init: initializes the development of a package.

       • yarn install: installs all the dependencies defined in a package.json file.

       • yarn publish: publishes a package to a package manager.

       • yarn remove: removes an unused package from your current package.

   Default Command
       Running yarn with no command will run yarn install, passing through any provided flags.

       ###Concurrency and --mutex

       When running multiple instances of yarn as the same user on the same server,  you  can  ensure  only  one
       instance runs at any given time (and avoid conflicts) by passing the global flag --mutex followed by file
       or network.

       When using file Yarn will write/read a mutex file .yarn-single-instance in the current working  directory
       by default. You can also specify an alternate or global filename.

         --mutex file
         --mutex file:/tmp/.yarn-mutex

       When  using network Yarn will create a server at port 31997 by default. You can also specify an alternate
       port.

         --mutex network
         --mutex network:30330

AUTHOR

       The Yarn Contributors

COPYRIGHT

       This manual page was written by Paolo Greppi <paolo.greppi@libpf.com> for the Debian project (and may  be
       used by others), based on material from the yarnpkg project itself.