I have installed many flavors of ruby on rvm, and using following command to change rvm ruby versions.
rvm use 1.9.3
then ruby -v gives me following result
ruby 1.9.3p551 (2014-11-13 revision 48407) [i686-linux]
but when i try to run any commands like rails s or bundle install
it gives me following error
Your Ruby version is 2.3.1, but your Gemfile specified 1.9.3
Using
rvm list
you can get list of ruby version on your system along with current & default versions.
If ruby version is not specified in Gemfile, then it is generally considering default rvm version.
But if it is specified in Gemfile, then that version of ruby should be installed in your system along with its bundler.
First make sure ruby version either installing or using it,
rvm install '1.9.3'
rvm use '1.9.3'
To install bundle of required ruby version, run this command
gem install bundler
That's can happens, when you trying to use fresh installed ruby without bundler, all newest installed ruby should also include bundler installation.
$> rvm use 1.9.3 && gem install bundler # may terminal reload needed
$> bundle install
$> bundle exec rails s
Related
$ ruby --version
ruby 2.7.2p137 (2020-10-01 revision 5445e04352) [x86_64-linux]
$ which ruby
/usr/local/rvm/rubies/ruby-2.7.2/bin/ruby
$ which gem
/usr/local/rvm/rubies/ruby-2.7.2/bin/gem
$ sudo gem install pg
ERROR: Error installing pg:
pg requires Ruby version >= 2.2.
Error installing pg, requires Ruby version >= 2.2 even if ruby is >=2.2.
When using RVM, it is necessary for some environment variables to be loaded to RVM (and RVM-installed Rubies) to find its code.
When running your gem install command with sudo however, sudo will reset your $PATH and unset the required environment variables before executing the gem command with the sanitized $PATH. With that, you will likely use your system ruby rather than your RVM-installed ruby.
In general, you should not use sudo to install Rubies or any gems when using RVM. Instead, you generally can and should just use your normal user.
If you do have to use sudo with RVM for some reason, there is a special rvmsudo command which retains your RVM environment in the evaluated context. See https://rvm.io/integration/sudo for details. However, as written above, you should try to avoid using this!
I have two versions of Ruby installed.
How can I install my ruby gem so that it gets installed in the version specified.
Normally you need to specify which Ruby you're using first, then call the appropriate gem command once that's set.
RVM, rbenv and others all work in different ways. For example, with RVM:
rvm use 2.4.1
gem install xyz -v 1.2.3
For rbenv it's a bit different:
rbenv local 2.4.1
gem install xyz -v 1.2.3
Where that generates a .ruby-version file in your current directory.
Since the gem command itself is Ruby, the proper Ruby environment must be set, which is where the multi-Ruby version managers come in.
I'm using OS X 10.10.5 (Yosemite). I'm trying to clone the github repo for MacDown. The instructions in the README say that after cloning one should do
git submodule init
git submodule update
bundle install
bundle exec pod install
I'm not a ruby programmer, so I had to install Bundler. The first two steps ran fine, but when I tried to run bundle install I got the error
activesupport-5.0.0.1 requires ruby version >= 2.2.2, which is incompatible with the current version, ruby 2.0.0p481
So I tried brew install ruby and now I have
saul#miniMac ✓ ruby --version
ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin14]
However, bundle install gives me the same error message as before. It's clear that it's finding the ruby at /usr/bin/ruby instead of the one at /usr/local/bin/ruby. How do I correct this?
I thought that perhaps the problem was that I had installed bundler before upgrading ruby, neither sudo gem uninstall bundler nor sudo gem uninstall bundle has any effect, and I don't know what else to try.
Here is all the output, in case it's relevant:
saul#miniMac ✓ bundle install
Fetching gem metadata from https://rubygems.org/..........
Fetching version metadata from https://rubygems.org/..
Fetching dependency metadata from https://rubygems.org/.
Resolving dependencies...
activesupport-5.0.0.1 requires ruby version >= 2.2.2, which is incompatible with
the current version, ruby 2.0.0p481
EDIT:
Thanks for the suggestions. I tried gem install bundler again, but it didn't help. I got the same error message. Here's what I get from bundle env
saul#miniMac ✗ bundle env
Environment
Bundler 1.13.6
Rubygems 2.0.14
Ruby 2.0.0p481 (2014-05-08 revision 45883) [universal.x86_64-darwin14]
Git 2.5.4 (Apple Git-61)
Gemfile
source 'https://rubygems.org'
gem 'cocoapods', '0.39.0'
Gemfile.lock
<No /Users/saul/Projects/macdown/Gemfile.lock found>
EDIT 2:
saul#miniMac ✓ which -a bundle
/usr/local/bin/bundle
/usr/bin/bundle
It seems that your PATH may have an entry that points to your older version of Ruby and despite having a newer version (2.3.1) it gets to use the first ruby binary it finds in one of the entries it finds in your PATH, which happens to be the old version. You could try to add your latest Ruby path as the first entry of your PATH variable, but in case a sub-shell is run and the default PATH is loaded the path to your latest Ruby would be overwritten. That being said, I think the easiest would be to use rvm here to make sure your environment is all set up with the version you intend to use at any given time. RVM can manage multiple versions of ruby in the same system. Read more about RVM here.
Run all the following commands in the same terminal window:
Install rvm: curl -sSL https://get.rvm.io | bash -s stable
Add rvm binary to PATH: export PATH="$PATH:$HOME/.rvm/bin"
Install ruby version you need: rvm install 2.3.1
Configure the current shell to use a specific version of Ruby like so: rvm use 2.3.1
Run bundle install again
What's the best way to upgrade to Ruby 2.3 through rvm while keeping all your gems installed on previous version (e.g. json, nokogiri, etc)?
EDIT
This question has an answer here: RVM: How to use gems from a different ruby?
$ rvm gemset copy $oldversion 2.3.0 ## Assign or replace $oldversion with old version name
ORIGINAL
Before installing Ruby 2.3, get a list of your installed gems and their versions using gem list. Then, after you install Ruby 2.3, use rvm to set 2.3 as the new default:
$ rvm install 2.3.0
$ rvm --default use 2.3.0
If you use Bundler, gem install bundler and then bundle install in all your project directories. This should install all of the gems relevant to your work.
If you don't use Bundler, or if you have gems installed that aren't part of any project's Gemfile, then you will want to go through the list of gems and their versions that you made earlier and gem install each of them, using -v to specify the version.
I'm trying to install github pages gem on my Mac OS X (yosemite).
I get following error:
Gem::InstallError: github-pages requires Ruby version ~> 2.0.0.
An error occurred while installing github-pages (4), and Bundler cannot continue.
Make sure that `gem install github-pages -v '4'` succeeds before bundling.
I checked my Ruby version by running following command -
ruby --version
And it says
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin13.0]
So I definitely have Ruby version ~> 2.0.0
Any assistance on this issue would be greatly appreciated!
There is a possible lack of important information here. Looking at your Ruby version, are you using rbenv or rvm?
I could imagine this happening if you use rbenv or rvm and then su or sudo to gem install github-pages. rbenv and rvm are specific to your user account and your shell environment. If you su or sudo to root, rbenv and rvm are no longer active.
The other possibility is that you are running it inside of a Bundler managed app that specifies another Ruby version in the Gemfile using the ruby x.x.x syntax.
If neither of these is the case, try running gem env to see what exactly rubygems thinks the story is. Also post the exact commands you are using to get this error.