I want to install ruby on rails in offline mode (i.e. without internet connection). So I downloaded railsinstaller-3.2.0.exe from http://railsinstaller.org/en and installed it. By the end, I had ruby installed but in order to have rails installed I ran
gem install rails
and faced these errors: (meaning command needs internet connection)
ERROR: Loading command: install (ArgumentError)
unknown encoding name - CP720
ERROR: While executing gem ... (NoMethodError)
undefined method 'invoke_with_build_args' for nil:NilClass
I mean is there any solution like downloading gems with another computer connected to internet and then copying files in the proper location in the installed directory of gems.
Please help me if you have any idea.
As said in a comment, it's a gem (lib) dependency issue.
You might want to look into installing the bundler gem library to manage dependencies for you, with bundler you would just have to run, bundle install and it would download all the required gems for you including any gem dependencies.
You can install bundler simply, just run
gem install bundler
Then in your rails project directory, just run bundle install.
Often to run a project (like rails for example) you might have to start it with
bundle exec rails start
To install Gem's on a non-internet connect computer you might want to refer to this answer on just that problem.
This is the website where you can find all available ruby gems. Ruby
gems download. Find the one you are interested and download it.
Then move the gem in a directory of your choice and cd into that from
the command prompt. I am using C:/ruby193/bin/pony-1.4.gem
Let's say that the gem we are interested in is the pony gem (smtp
email).
Just type gem install pony-1.4.gem
and you should get it installed manually unless you have a restricted
acc with not adequate administrative privileges.
You can also refer to the official documentation on the matter.
Related
I am learning Ruby on Rails and I find it annoying having to install and worry about gems and other dependencies for the apps I build . Does Rails have a way to install all your gems and dependencies for you ?
Yes. You have a file called Gemfile in the directory of your application.
Put all the gem you want to use in it.
And then just run bundle install to install all in one time (with dependencies) and later bundle update to update all your gem installed.
You can see Bundler: The best way to manage a Ruby application's gems and Ruby on Rails Tutorial for more informations.
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
Generally, if I need a gem, I put it in the Gemfile and bundle install. However, I don't understand if there is a benefit to downloading the gems locally first with gem install _____. Is there any benefit to this? Does bundle install no longer have to connect to the net in that situation?
Bundler installs the gems located in your Gemfile locally the same as if you ran gem install for each of those gems.
Gem install needed for gems that can be used outside of bundler applications. For example request-log-analyzer need to be installed outside of any apps for be available in command line.
I myself use gem install _______ then i use bundle install --local which doesn't require internet connection if the gem is found locally but will return an error if the gem was not found locally...
I find this method faster in downloading and installing gems, plus if the gems are found locally then i have also the benefit of altering the gemfile and install the gems without having internet connection.
This has driven me crazy. I changed laptop and tried getting my Rails environment working again. Mac OS X has its own ruby, but I used brew and installed new. I installed rails 3.0.5, ran:
bundle install
Then:
rails s
I got this error:
Could not find aws-s3-0.6.2 in any of the sources
Run `bundle install` to install missing gems.
After bashing my head against a wall for a couple hours, I tried just manually installing the gems and it worked! So, apparently, rails and bundler are looking at different places for my gems. Both are from my brew install.
How can I figure out what each is looking at so I can use "bundle install" again?
Rails and Bundle are looking at the gems providing they are in the bundle.
Use the
bundle show
command to see the gems Rails is having access to via bundler.
Also you can examine the Gemfile.lock file.
The gemfile sources mainly from rubygems.org as supposed to rubyforge (which came up when i searched that gem on google). I think the gem command will check both. You can specify additional sources, as mentioned in the readme: http://gembundler.com/man/gemfile.5.html
Are you using pow? I've been having this issue with Pow starting up with one version of ruby, but not the version that I have RVM currently set to.
I have not tried it yet, but this issue on Github mentions the problem and refers people to the Pow trouble shooting here. I've pasted the contents below:
RVM
Incorrect ruby or gemset is being used
Create a .rvmrc at your project root. See rvmrc docs.
System-wide RVM install
If you have a system-wide RVM install and are getting the error LoadError: no such file to load -- bundler/setup, run rvm info to find out where rvm is installed on your machine, then do this:
echo "export POW_RVM_PATH=/usr/local/rvm/scripts/rvm" >> ~/.powconfig
Where /usr/local/rvm/ is the location of your rvm installation.
Then restart POW by killing it in the Activity Monitor or in Terminal.
I'm a newbie to Ruby on Rails. I had a quick question about installing gems.
I'm using a windows 7 64 bit machine with Ruby 1.9.2 and Rails 3.0 and I'm trying to install the gravatar_image_tag gem.
gem install gravatar_image_tag
After I run that it says its succcessful. But when I try to do this:
gravatar_image_tag -v
It says that 'gravatar_image_tag' is not recognized as an internal or external command, operable program or batch file'
When i looked into my ruby192/bin file there are batch files for rails, annotate etc etc that work fine but there's not batch file for gravatar_image_tag.
I was wondering where I'm going wrong with this.
Thanks in advance.
Not all gems are executable from the command line. The best way to see if a gem is installed (as well as its version) is to run:
gem list
If you want to use a gem inside your rails 3 project, you should add it to your Gemfile (in the root of your project). Something like this
gem "gravatar_image_tag"
then run bundle install.
The gravatar_image_tag should placed somewhere in your view, to generate the correct html.
More information can be found on their github page.
[EDIT] Maybe my answer was not too the point. To check if the gem was correctly installed, you either type
gem list gravatar_image_tag
or
bundle show gravatar_image_tag
if you installed the gem using bundler.
Not all gems install a batch-file, and according to the documentation this doesn't either.