In my rails application
ruby -v
ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]
When I run
rvm gemset list
It specifies my gemset which i'm using
global
=> blackapp
now i do bundle install and gems are installed successfully.when i do gem list, it shows * LOCAL GEMS * as empty.When i run rvm gem list it shows all the gems.So what could be the reason that gem list is not working.
I think I used bundle pack and that could be the reason as it shows .
Your bundle is complete! It was installed into ./vendor/bundle
How to overcome this?
bundle install will install the gems to the vendor/cache directory within a rails app, which does not install them in the gems directory. To list the gems installed by bundler, use bundle list
use gem list --local instead of using gem list local
you also have to make sure you have selected your specific gemset you want the gems installed into. I see that you did this, but this is the number one reason for 'disappearing' gems. People forget to select the gemset prior to doing the install of gems, then end up installed in the 'default' gemset (which is used when no gemset is selected), and then they select their gemset and wonder why they're not there.
Also, do NOT use rvm to install to system. System rubies are NOT managed at ALL by RVm and the only reason why RVM supports
rvm use system
is simply to allow people to select the system ruby. RVM is not and will not be responsible for changes to the system ruby and its environment as this is usually managed by the OS's package manager. Using RVM to manage this is a Bad Idea(Tm) as a result.
Related
As the question states - where does the gem install?
Is it installing within the app directory that I'm working in (i.e. user/sites/sample_app)? Or is it being installed on my computer? If the latter where exactly?
Thanks!
gem install process
first download gem and save desktop
1.next step open command prompt and set location that means c:/desktop> gem install --local "gemname"
2.next step com to rails consoler and type $bundle install --local.
3. type the gem name on gem list
I have two questions:
Where do you install your ruby?
Did you use RVM or rbenv?
Now I will explain your question using my situation as an example.
I use RVM to manage rubies on my mac os.
now the ruby install in path
/Users/pin/.rvm/rubies/ruby-2.1.1
and these will be a gems directory under .rvm path. In this directory,
/Users/pin/.rvm/gems
there are many gems group, I have a group named
ruby-2.1.1#global
which is used by the default ruby version.
This is a directory and there will be a gems directory under it.
/Users/pin/.rvm/gems/ruby-2.1.0/gems
In this directory, you will find all of the gems you installed using cmd
bundle install
If you don't use ruby version management tools like rvm or rbenv, you may find the gems
around your ruby path. If you still can't find them, you can post the details of how you
install the rubies and other system configs, so that we can discuss here.
If you are using rvm then its get installed in
/home/user/.rvm/gems/ruby-version#global/ or /home/user/.rvm/gems/ruby-version/
If you are using specific gemset for gems then
/home/user/.rvm/gems/ruby-version#gemset_name/
If you want to know where gem is installed use gem which *gem_name* e.g.:
gem which rails
If you installed your gems with bundle install use bundle show *gem name* e.g.:
bundle show rails
Gems
If you use gem install x, you're adding the gem to the local ruby version on your system. This is a system-wide installation, and will be stored in your rubylib/ruby/gems dir:
The install command downloads and installs the gem and any necessary
dependencies then builds documentation for the installed gems.
Bundler
Using the bundle install command (when you have a Gemfile & use bundler), you basically tell bundler to install the gems relative to your specific applicaiton:
Bundler makes sure that Ruby can find all of the gems in the Gemfile
(and all of their dependencies). If your app is a Rails 3 app, your
default application already has the code necessary to invoke bundler.
If it is a Rails 2.3 app, please see Setting up Bundler in Rails 2.3.
For example, if you have a Rails 3.2 app, and a Rails 4.1 app on your system, using bundler allows you to instal the dependencies (gems) for each app independently
If you use gem install x, it will install the gem for all applications, and should only be used for things like rmagick and the database connection gems
What I did:
I installed rails by mistake to the wrong gemset.
$ rvm use 1.9.3
Using /home/username/.rvm/gems/ruby-1.9.3-p125
$ gem env gemdir
/home/username/.rvm/gems/ruby-1.9.3-p125
$ gem install rails
It should have gone into the global gemset.
$ rvm use 1.9.3
Using /home/username/.rvm/gems/ruby-1.9.3-p125
$ rvm gemset use global
Using ruby-1.9.3-p125 with gemset global
$ gem env gemdir
/home/username/.rvm/gems/ruby-1.9.3-p125#global
$ gem install rails
Questions:
How can I uninstall the whole list of gems installed with rails as well as rdoc and ri without affecting other gems installed in the same gemset? Can I also clean the cache/ folder in the same step?
As far as I understood it is best practice to install common gems
into the global gemset, while project specific gems will go into
the specific gemset of that project. Is that correct?
By the way, what is the "wrong" gemset under /home/username/.rvm/gems/ruby-1.9.3-p125 good for anyways?
I am aware of similar questions like these.
Uninstall Rails 3 with dependencies?
Uninstalling rails and gems, getting error "cannot uninstall, check 'gem list -d ...'
How to completely uninstall rails 3.0.0.beta3 and all its dependencies?
How do I completely uninstall rails, ruby and rubygems?
Though, I do not want to reinstall or update rails. I simply want to remove it from that particular gemset.
Approximation / question 1:
I only found an answer to the first question. Thus, it does not remove rails and its dependencies but all gems. This is what I did following the example given. I left off the name since there is no specific name, as far as I understand.
rvm use 1.9.3
Using /home/username/.rvm/gems/ruby-1.9.3-p125
rvm gemset empty
This removed the files under doc/ and gems/. However, the cache/ folder is still filled.
How can I uninstall the whole list of gems as well as rdoc and ri?
gem uninstall gemname1 gemname2 ...
will also remove ri and rdoc, just list the gem's names without any commas. (you can list all be using "gem list")
UPDATE:
"rvm gemset empty" works faster indeed.
As far as I understood it is best practice to install common gems into the global gemset, while project specific gems will go into the specific gemset of that project. Is that correct?
Yes, it's correct. Global gemset is reached by all Gemsets from the same Ruby version.
By the way, what is the "wrong" gemset under /home/username/.rvm/gems/ruby-1.9.3-p125 good for anyways?
I think it's global. Try "gemset list" to which one is that. There will be a = sign before the current one in use and a > sign before default gemset.
I think maybe your gemset is not wrong, it's probably how you want it. Try to make a new Gemset, and change to it and list all gems, probably you're gonna see all your gems.
You can remove a whole gemset anytime (except global) by:
gemset delete gemsetname
Also you might want to install rails without ri and rdoc:
gem install rails --no-ri --no-rdoc
I got confused of some Rails' concepts like: gemset, rubygems, bundler . I have following three questions:
1. After I installed the RVM tool, what are the correct steps to setup the development enviroment for creating a rails project (say rails v2.3 project)
2. What is the difference between "gem install XXX" and "bundle install"? Can I understand it in the way that "bundle install" install all gems needed in the app at once while "gem install XXX" only install the specified "XXX" gem ? Are there any other difference? Why not use bundler to install specific rails then?
3. If I want to use rails v3.0 for project_one, and use rails v2.3 for project_two. How to create the two projects with the specific rails versions? How about different ruby versions for different projects? Do I only need to specify the needed version in Gemfile or install the needed version under the project path?
RVM allows you to create different gemsets alongside different ruby versions.
You can install different versions of ruby with rvm install.
rvm install 1.8.7
rvm install 1.9.2
rvm list known will tell you the available ruby implementations you can install.
Say, you have two projects: project_one and project_two, and both of them have different gem dependencies. So you'll want to create two empty gemsets with, say, Ruby 1.9.2.
rvm gemset create 1.9.2#project_one
rvm gemset create 1.9.2#project_two
To use project_two's gemset, you can use rvm use to select the gemset.
rvm use 1.9.2#project_two
You can also add the above command into a file called .rvmrc in the root path of your rails application, which rvm will load automatically whenever you cd into the app's root directory.
If you want to use Rails 2.3.8 for project_one,
rvm use 1.9.2#project_one
gem install rails -v 2.3.8
and Rails 3.1.0 for project_two,
rvm use 1.9.2#project_two
gem install rails -v 3.1.0
The difference between gem install and bundle install is that gem install installs only the specified gem into your gemset, while bundle install installs all the gems located in your app's Gemfile.
1) If you have a rvm setup I propose add in in your app file .rvmrc
and in that file:
rvm --create ree-1.8.7-2011.03#myappname
This will alway use specify version of ruby (in that case 'ree-1.8.7-2011.03') and all gems will be installed in rvm gemset named: myappname. This file will always make sure every time you go to that folder from bash_console it will point rvm to correct environment.
2) If you have rvm setup then:
gem install XXX creates gem in specify rvm gemset or if not global rvm gemset
sudo gem install XXX will add gems to you Global gems
Like you said, you should always use Bundle install, and group gems for development,test, production.
3) This can achieve like I said in point 1) just create this file in your app
I am following these instructions: https://github.com/phifty/agraph/blob/master/README.rdoc,
and there is a step to install a gem using this command:
gem install agraph
I am new to RoR, but I have RVM and Bundler. I am not sure which I should use. Should I install this using RVM or Bundler? What should be the command?
RVM is Ruby Version Manager. It lets you maintain separate installs of Ruby side-by-side without conflicts, easily. One of the requisites for doing this is keeping gems for each version of Ruby separate since the installers can "toggle" based on which version of Ruby you're running.
Gem is a command that lets you install gems. It's the core of the whole infrastructure – it doesn't call out to a lower-level "packager" to do its work.
Bundler runs "on top" of Gem. It makes managing gem versions easier, much like RVM does for Rubies (versions of Ruby). It'll automatically install gems that aren't installed, so you don't need to explicitly run gem install gem-name before running bundle (or bundle install).
Gem, Bundler, and RVM all cross paths if you start using RVM's gemsets. They allow you to further isolate and control your environment by creating a separate "gem environment" of sorts. The primary use for this is so that you can keep gems for different projects separate, which aids in managing versions. If you use Bundler, this isn't really as important or useful as in pre-Bundler days where Rails/Sinatra/etc. would require the most recent version of a gem.
Does that answer your question?
If you are using Rails 3 you should put the command in your application Gemfile
gem 'agraph'
then run bundle install. This will take care of dependency resolution and bundling the gem on your production servers when you deploy.
For RVM the only thing you might want to do is set an RVM gemset for your application. You can do this by creating a .rvmrc file in your application directory, which will automatically set the RVM ruby version and gemset when you enter into that directory. You should not manually install gems for your application using RVM.
I want to switch between rails 2.3.10 as the "active" gem for my OS, so that I can invoke it at the command line.
Is it possible to do this? I'm not using rvm. Maybe it's time to start.
I tried gem install rails --version=2.3.10, but that just makes sure that version of the gem is installed, it doesn't put it in /usr/bin/rails.
(I do already use bundler for my apps -- but haven't needed any precise control over gems at the OS level until now)
If your problem is to run binaries of a certain version, then:
rails --version # => the latest version
rails _2.3.10_ --version # => Rails 2.3.10
This pattern (gem-binary _gem-version_) works for any gem binary.
Use RVM
RVM allows you to manage different versions of Ruby and Gems. You can install a version of ruby using, for example
rvm install 1.9.2
You can then use it using:
rvm use 1.9.2
Use specific gems on a per project basis with gemsets.
If you want further namespacing you can set up gemsets; directories which will contain specific gems for a specific project.
rvm gemset create myproject
then you can use them like so:
rvm use 1.9.2#myproject
Automation
To automate the process of switching gems, pop .ruby-version and .ruby-gemset files in your project root. Pop the version of Ruby and name of the gemset you want to use inside them and RVM wil select the correct gemset when you cd into your project directory.
Installing gems into your gemset
Install your gems into your gemset in the usual way using bundler if you are using it:
bundle install
or just using the regular old:
gem install mygem
The gems will go in the right gemset.
RVM Alternatives
You might also want to check out rbenv, which does similar job.
You can use RVM
Then you can also use Bundler afterwards, which manages gem dependencies fine.
In your Gemfile
gem "rails", "2.3.10"
and in your application
require 'rubygems'
require 'bundler/setup'
and you're done.
EDIT: Just saw your RVM mention in the post. Definitely the way to go.
You're going to want to install RVM -- it's an amazing package that will let you manage different Rubys and different sets of gems on the same machine. You can switch back and forth with total ease.
Here's the installation guide: http://rvm.beginrescueend.com/rvm/install/
Once you got everything get up, you can see all of your installed rubys at the command line with with rvm list, and switch with rvm use ruby-head, for example. RVM keeps the gems on each ruby separate, which should help with your question.