Respuestas:
Úselo gem environmentpara conocer su entorno de gemas:
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 => true
- :verbose => true
- :backtrace => false
- :bulk_threshold => 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/binObserve las dos secciones para:
INSTALLATION DIRECTORYGEM PATHSgem envpara abreviar
EXECUTABLE DIRECTORY.
EXECUTABLE DIRECTORYcontiene las versiones ejecutables CLI instalados por las gemas, pero no es de los propios gemas.
Me resultó útil obtener una ubicación del archivo de la biblioteca con:
gem which *gemname*gem which 'logstash/inputs/tcp.rb'
Después de instalar las gemas, si quieres saber dónde está una gema en particular. Intenta escribir:
gem listPodrá ver la lista de gemas que ha instalado. Ahora usa bundle showy nombra la gema para la que quieres conocer el camino, así:
bundle show <gemName>Could not locate Gemfile or .bundle/ directory.
gem env) muestra sólo la carpeta principal de la gemscarpeta: /home/test/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0. Hay una serie de carpetas en su interior y su gema puede estar ubicada en casi cualquiera de ellas, eso es lo que se bundle show <gemName>muestra exactamente (y gem env) no.
Para completar otras respuestas, la gema de ruta de gema puede encontrar la ruta de instalación de una gema en particular.
Instalación:
gem install gem-pathUso:
gem path rails
=> /home/cbliard/.rvm/gems/ruby-2.1.5/gems/rails-4.0.13
gem path rails '< 4'
=> /home/cbliard/.rvm/gems/ruby-2.1.5/gems/rails-3.2.21Esto es realmente útil ya que puede usarlo para grep o editar archivos:
grep -R 'Internal server error' "$(gem path thin)"
subl "$(gem path thin)"Puede verificarlo desde el símbolo del sistema ejecutando gem help commandsy luego seleccionando el comando adecuado:
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:~$ Ahora de lo anterior puedo ver que el comando environmentes útil. Entonces yo haría:
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
<omitted> 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
<gem_command>: 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:~$ Finalmente para mostrarte lo que pediste, haría:
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:~$ gem help commands. Y debería haber escrito que estoy usando rbenv.
Puedes engañar gem openpara mostrar la ruta de la gema:
VISUAL=echo gem open gem-nameEjemplo:
VISUAL=echo gem open rails
=> /usr/local/opt/asdf/installs/ruby/2.4.3/lib/ruby/gems/2.4.0/gems/rails-5.1.4Simplemente funciona, y no es necesaria una gema de terceros.
-eopción ( -e echo), si es más fácil que configurar una variable de entorno.
gem envfunciona igual gem environment. Guarda algo de tipeo.
# 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 => true
- :verbose => true
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- https://rubygems.org/gem help commandsdevuelve "Los comandos se pueden abreviar, siempre y cuando no sean ambiguos. Por ejemplo, 'gem i rake' es la abreviatura de 'gem install rake' " . En otras palabras gem environment, gem envy gem etodo funciona pero gem environmentes autodocumentado para aquellos que no saben qué está haciendo, así que deberíamos usar eso para los novatos.
Las gem envlistas donde se pueden instalar gemas , pero pueden ser 10 o más ubicaciones. Si quieres saber dónde está instalada una gema en particular , puedes ejecutar:
gem list -d <gemname>Salida de ejemplo:
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 enginesEsto funciona y te da la ruta instalada para cada gema. Esto es muy útil cuando intentas hacer compilaciones de acopladores de varias etapas. Puedes copiar en el directorio específico posterior a la instalación del paquete.
bash-4.4# gem list -d
Salida::
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
GEM PATHSsolo se usa el primero. ¿Está bien?