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.