How to find where gem files are installed

Question

I can finds gems that are installed using gem list  but it doesn t show me where the gems are installed   How can I find where the gems are  and how can I know before installing a gem where it will be installed

User · Answer

This works and gives you the installed at path for each gem. This super helpful when trying to do multi-stage docker builds.. You can copy in the specific directory post-bundle install.

bash-4.4# gem list -d

Output::

aasm (5.0.6)
    Authors: Thorsten Boettger, Anil Maurya
    Homepage: https://github.com/aasm/aasm
    License: MIT
    Installed at: /usr/local/bundle

  State machine mixin for Ruby objects

User · Answer

To complete other answers  the gem-path gem can find the installation path of a particular gem   Installation   gem install gem-path   Usage   gem path rails   gt   home cbliard  rvm gems ruby-2 1 5 gems rails-4 0 13 gem path rails   lt  4    gt   home cbliard  rvm gems ruby-2 1 5 gems rails-3 2 21   This is really handy as you can use it to grep or edit files   grep -R  Internal server error     gem path thin   subl    gem path thin

User · Answer

The gem env lists where gems can be installed  but this can be 10 or more locations  If you want to know where a particular gem is installed  you can execute   gem list -d  lt gemname gt    Example output   tilt  2 0 9      Author  Ryan Tomayko     Homepage  http   github com rtomayko tilt      License  MIT     Installed at   opt rubies ruby-2 5 3 lib ruby gems 2 5 0      Generic interface to multiple Ruby template engines

User · Answer

You can trick gem open into displaying the gem path   VISUAL echo gem open gem-name   Example   VISUAL echo gem open rails   gt   usr local opt asdf installs ruby 2 4 3 lib ruby gems 2 4 0 gems rails-5 1 4   It just works  and no third party gem is necessary

User · Answer

if you are using rvm tool you can run this command to print gem path   rvm gemdir   OR  echo  GEM HOME

User · Answer

After installing the gems  if you want to know where a particular gem is  Try typing   gem list  You will be able to see the list of gems you have installed  Now use bundle show and name the gem you  want to know the path for  like this   bundle show  lt gemName gt   Or  as of younger versions of bundler    bundle info  lt gemName gt

User · Answer

gem env works just like gem environment  Saves some typing     gem env RubyGems Environment    - RUBYGEMS VERSION  2 0 14   - RUBY VERSION  2 0 0  2014-02-24 patchlevel 451   i686-linux    - INSTALLATION DIRECTORY   usr local lib ruby gems 2 0 0   - RUBY EXECUTABLE   usr local bin ruby   - EXECUTABLE DIRECTORY   usr local bin   - RUBYGEMS PLATFORMS      - ruby     - x86-linux   - GEM PATHS       -  usr local lib ruby gems 2 0 0      -  root  gem ruby 2 0 0   - GEM CONFIGURATION       -  update sources   gt  true      -  verbose   gt  true      -  backtrace   gt  false      -  bulk threshold   gt  1000   - REMOTE SOURCES       - https   rubygems org

User · Answer

I found it useful to get a location of the library file with   gem which  gemname

User · Answer

Use gem environment to find out about your gem environment   RubyGems Environment    - RUBYGEMS VERSION  2 1 5   - RUBY VERSION  2 0 0  2013-06-27 patchlevel 247   x86 64-darwin12 4 0    - INSTALLATION DIRECTORY   Users ttm  rbenv versions 2 0 0-p247 lib ruby gems 2 0 0   - RUBY EXECUTABLE   Users ttm  rbenv versions 2 0 0-p247 bin ruby   - EXECUTABLE DIRECTORY   Users ttm  rbenv versions 2 0 0-p247 bin   - SPEC CACHE DIRECTORY   Users ttm  gem specs   - RUBYGEMS PLATFORMS      - ruby     - x86 64-darwin-12   - GEM PATHS       -  Users ttm  rbenv versions 2 0 0-p247 lib ruby gems 2 0 0      -  Users ttm  gem ruby 2 0 0   - GEM CONFIGURATION       -  update sources   gt  true      -  verbose   gt  true      -  backtrace   gt  false      -  bulk threshold   gt  1000   - REMOTE SOURCES       - https   rubygems org    - SHELL PATH       -  Users ttm  rbenv versions 2 0 0-p247 bin      -  Users ttm  rbenv libexec      -  Users ttm  rbenv plugins ruby-build bin      -  Users ttm perl5 perlbrew bin      -  Users ttm perl5 perlbrew perls perl-5 18 1 bin      -  Users ttm  pyenv shims      -  Users ttm  pyenv bin      -  Users ttm  rbenv shims      -  Users ttm  rbenv bin      -  Users ttm bin      -  usr local mysql-5 6 12-osx10 7-x86 64 bin      -  Users ttm libsmi bin      -  usr local bin      -  usr bin      -  bin      -  usr sbin      -  sbin      -  usr local bin   Notice the two sections for    INSTALLATION DIRECTORY GEM PATHS

User · Answer

You can check it from your command prompt by running gem help commands and then selecting the proper command   kirti kirti-Aspire-5733Z     gem help commands GEM commands are       build                  Build a gem from a gemspec     cert                   Manage RubyGems certificates and signing settings     check                  Check a gem repository for added or missing files     cleanup                Clean up old versions of installed gems in the local                            repository     contents               Display the contents of the installed gems     dependency             Show the dependencies of an installed gem     environment            Display information about the RubyGems environment     fetch                  Download a gem and place it in the current directory     generate index         Generates the index files for a gem server directory     help                   Provide help on the  gem  command     install                Install a gem into the local repository     list                   Display gems whose name starts with STRING     lock                   Generate a lockdown list of gems     mirror                 Mirror all gem files  requires rubygems-mirror      outdated               Display all gems that need updates     owner                  Manage gem owners on RubyGems org      pristine               Restores installed gems to pristine condition from                            files located in the gem cache     push                   Push a gem up to RubyGems org     query                  Query gem information in local or remote repositories     rdoc                   Generates RDoc for pre-installed gems     regenerate binstubs    Re run generation of executable wrappers for gems      search                 Display all gems whose name contains STRING     server                 Documentation and gem repository HTTP server     sources                Manage the sources and cache file RubyGems uses to                            search for gems     specification          Display gem specification  in yaml      stale                  List gems along with access times     uninstall              Uninstall gems from the local repository     unpack                 Unpack an installed gem to the current directory     update                 Update installed gems to the latest version     which                  Find the location of a library file you can require     yank                   Remove a specific gem version release from                            RubyGems org  For help on a particular command  use  gem help COMMAND    Commands may be abbreviated  so long as they are unambiguous  e g   gem i rake  is short for  gem install rake   kirti kirti-Aspire-5733Z       Now from the above I can see the command environment is helpful  So I would do   kirti kirti-Aspire-5733Z    gem help environment Usage  gem environment  arg   options      Common Options      -h  --help                       Get help on this command     -V  -- no- verbose               Set the verbose level of output     -q  --quiet                      Silence commands         --config-file FILE           Use this config file instead of default         --backtrace                  Show stack backtrace on errors         --debug                      Turn on Ruby debugging     Arguments      packageversion  display the package version     gemdir          display the path where gems are installed     gempath         display path used to search for gems     version         display the gem format version     remotesources   display the remote gem servers     platform        display the supported gem platforms      lt omitted gt        display everything    Summary      Display information about the RubyGems environment    Description      The RubyGems environment can be controlled through command line arguments      gemrc files  environment variables and built-in defaults       Command line argument defaults and some RubyGems defaults can be set in a        gemrc file for individual users and a  etc gemrc for all users  These     files are YAML files with the following YAML keys          sources  A YAML array of remote gem repositories to install gems from        verbose  Verbosity of the gem command  false  true  and  really are the                 levels        update sources  Enable disable automatic updating of repository metadata        backtrace  Print backtrace when RubyGems encounters an error        gempath  The paths in which to look for gems        disable default gem server  Force specification of gem server host on     push        lt gem command gt   A string containing arguments for the specified gem command      Example          verbose  false       install  --no-wrappers       update  --no-wrappers        disable default gem server  true      RubyGems  default local repository can be overridden with the GEM PATH and     GEM HOME environment variables  GEM HOME sets the default repository to     install into  GEM PATH allows multiple local repositories to be searched for     gems       If you are behind a proxy server  RubyGems uses the HTTP PROXY      HTTP PROXY USER and HTTP PROXY PASS environment variables to discover the     proxy server       If you would like to push gems to a private gem server the RUBYGEMS HOST     environment variable can be set to the URI for that server       If you are packaging RubyGems all of RubyGems  defaults are in     lib rubygems defaults rb   You may override these in     lib rubygems defaults operating system rb kirti kirti-Aspire-5733Z       Finally to show you what you asked  I would do   kirti kirti-Aspire-5733Z    gem environment gemdir  home kirti  rvm gems ruby-2 0 0-p0 kirti kirti-Aspire-5733Z    gem environment gempath  home kirti  rvm gems ruby-2 0 0-p0  home kirti  rvm gems ruby-2 0 0-p0 global kirti kirti-Aspire-5733Z

[ruby] How to find where gem files are installed

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