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.