I've forked the redis depository on github to https://github.com/lmirosevic/redis-rb
I added it to my Gemfile:
gem 'redis', :github => 'lmirosevic/redis-rb'
And I require the gem inside my Sinatra app:
require 'redis'
However it fails with the following error:
/app/vendor/ruby-2.0.0/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require': cannot load such file -- redis (LoadError)
Any suggestions on what could be wrong? It seems like it should work!
EDIT
I should note that the bundler phase is fine. The problem seems to be in the require step.
Bundler gives me this output:
Using redis (3.0.4) from git://github.com/lmirosevic/redis-rb (at master)
I should also say that my directory structure is something like this. Not sure if this makes a difference.
/
.env
Gemfile
Gemfile.lock
Procfile
/lib
my_sinatra_app.rb
/config
...
You must have
require 'bundler/setup'
in your app or else you're not really using bundler: this is what ensures that the gem versions loaded are the ones in your gemfile and sets up load paths for anything not installed globally.
Calling Bunder.setup allows you to control what groups are used, but if just using the default group is fine then you don't need to do this.
If you aren't setting up bundler then your gemfile is used to install the required versions of the gems but then bundler is no longer used - your app will used whatever gems are installed, whether the versions match or not and you won't be able to use gems that aren't installed in the default gem load paths.
Related
I am trying to include the ruby-mysql gem in my ruby script. I have installed the gem using bundler but when I run bundle exec ./mysql_connector, I receive the error ./mysql_connector:4:in ``require': cannot load such file -- ruby-mysql (LoadError). Can you please help me troubleshoot what the problem is?
What I did
Installed rails in my home directory.
I do not have root access to the server so I have installed rails in my local directory by following the instructions here:
http://www.r-bloggers.com/installing-ruby-on-linux-as-a-user-other-than-root/
Created a directory for my application.
My application resides in my home directory in a folder called connector. It has a Gemfile that looks like this:
source 'https://rubygems.org'
gem 'ruby-mysql'
Call bundle install.
Using ruby-mysql 2.9.14
Using bundler 1.11.2
Bundle complete! 1 Gemfile dependency, 2 gems now installed.
Bundled gems are installed into ./vendor/bundle.
Add dependencies to my script. My script is in connector/mysql_connector and it reads:
#!/home/dcox/bin/ruby
require 'rubygems'
require 'bundler/setup'
require 'ruby-mysql'
Make script executable. I saw that you need to run bundle exec using an executable file, so I followed the instructions here to make my script executable: http://commandercoriander.net/blog/2013/02/16/making-a-ruby-script-executable/
Run the script. I execute using bundle exec mysql_connector and see:
/home/dcox/bin/mysql_connector:4:in `require': cannot load such file -- ruby-mysql (LoadError)
from /home/dcox/bin/mysql_connector:4:in `<main>'
Is it the $LOAD_PATH? After searching around for answers, I discovered a lot of SO answers as well as a blog post (https://codedecoder.wordpress.com/2013/09/23/require-and-load-in-ruby-loaderror-cannot-load-such-file/) that seem to suggest the problem is that the gem is not installed in a directory on the $LOAD_PATH. Here is what I see when I run $LOAD_PATH from IRB:
irb(main):002:0> $LOAD_PATH
=> ["/home/dcox/lib/ruby/site_ruby/2.1.0",
"/home/dcox/lib/ruby/site_ruby/2.1.0/x86_64-linux",
"/home/dcox/lib/ruby/site_ruby", "/home/dcox/lib/ruby/vendor_ruby/2.1.0",
"/home/dcox/lib/ruby/vendor_ruby/2.1.0/x86_64-linux",
"/home/dcox/lib/ruby/vendor_ruby", "/home/dcox/lib/ruby/2.1.0",
"/home/dcox/lib/ruby/2.1.0/x86_64-linux"]
Next I checked to see the location of ruby-mysql:
dcox#analytics1:~/connector$ bundle show ruby-mysql
/data/home/dcox/connector/vendor/bundle/ruby/2.1.0/gems/ruby-mysql-2.9.14
Obviously my connector/vendor/bundle path is not on the $LOAD_PATH. I could add it, but I have a feeling I am missing something simple here because bundler is supposed to work as long as you follow the instructions, right?
Any advice or help is very much appreciated! Thanks!!
If you just want to require this specific gem, require 'mysql' should work (e.g., https://github.com/tmtm/ruby-mysql/blob/master/test/test_mysql.rb#L10).
Your file should call Bundler.setup http://bundler.io/bundler_setup.html
Better yet, if you instead call Bundler.require(:default) it will setup and require all the gems in your Gemfile for you.
I'm deploying my rails project to production server. There is only 1.9.3 version of ruby (I developed on 2.1.2) so there is few compatibility problems in gems versions. More over, I downloaded one of gems to vendor/gem_name and made necessary fixes in its sources, so I need to use exactly my version of that gem and, as you understand, It's not possible to update it.
in Gemfile
require 'gem_name', :path => 'vendor/gem_name'
So after cloning project to server I run
bundle install --path vendor/bundle
and it created bundle directory in vendor folder with gems versions, needed to me, inside it.
After that I tried to run fetching script to fill db with some data by command
ruby *_fetch.rb
inside *_fetch.rb:
require 'gem_name'
And it fails with error
You have already activated gem_name older_version, but your Gemfile requires
gem_name newest_version. Using bundle exec may solve this. (Gem::LoadError)
from /usr/local/rvm/gems/ruby-1.9.3-p374/gems/bundler-1.3.5/lib/bundler/runtime.rb:19:in `setup'
So how could I specify script to require my edited local gem?
Run it with bundle exec That's exactly what bundle exec is for.
I'm developing a gem with Jeweler in a custom directory.
I want to be able to require the gem within any app (and also the executables files from $PATH), and without needing to build and install the gem each time I modify it.
I thought about 2 ways:
I make a symlink to $GEM_HOME/gems and $GEM_HOME/bin
I add the bin directory to $PATH and the lib directory to rubygems to be loaded.
But I bet there is a proper way to do this.
You can specify a local path in the gem command:
gem 'your-gem', '1.2.3', :path => 'path/to/your-gem'
Update: As #Nick points out in the comments,
This is specific to using bundler. In general, it's just require '/path/to/your-gem.
I'd like to add, however, that if you're using a custom-developed gem, bundle will probably make your life easier if you're not already using it. This is because with bundler, when you're done developing the gem (or at a stable/release point) you can load a gem directly from a github repository like this:
gem 'your-gem', :git => 'git#github.com:you/your-gem.git'
No need to mess around with your Gemfile
require 'bundler/setup' will put the right gem into your $LOAD_PATH and allow you to require it on the next line.
#!/usr/bin/env ruby
require 'bundler/setup'
require '<gem-name>'
For some reason when I run bundle install it installs to production:
Your bundle is complete! It was installed into ./RAILS_ENV=production
Arrrghh, how do I switch back to development??
Notes:
I haven't modified any environment files
When I run Rails.env from the console I get "development"
Gem file:
source 'http://rubygems.org'
gem 'rails', '3.0.3'
gem 'sqlite3-ruby', '1.3.2', :require => 'sqlite3'
group :development do
gem 'rspec-rails'
gem 'nokogiri'
gem 'will_paginate'
end
group :test do
gem 'rspec'
end
Also worth noting, it creates a folder in my app called RAILS_ENV=production which I posted a question about here which now I guess is linked to this issue.
Update
When I run bundle config I get the following information, you can clearly see the Path is set to the culprit! Any ideas how I change this? I tried re-installing the bundler gem but to no avail, maybe this is a bug within Bundler?
$ bundle config
Settings are listed in order of priority. The top value will be used.
disable_shared_gems
Set for your local app (/Users/zinc/ror/site/.bundle/config): "1"
path
Set for your local app (/Users/zinc/ror/site/.bundle/config): "RAILS_ENV=production"
The explanation to that is in in the bundler manual. Read the heading Grouping Your Dependencies. Specifically
Bundler will remember that you installed the gems using --without production. For curious readers, bundler stores the flag in APP_ROOT/.bundle/config. You can see all of the settings that bundler saved there by running bundle config, which will also print out global settings (stored in ~/.bundle/config), and settings set via environment variables. For more information on configuring bundler, please see Advanced Usage: Configuring Bundler.
And the solution is to pass a different value for the property or remove the file APP_ROOT/.bundle/config.
Ok I fixed this.
I simply removed the path from my bundle config file and it seems to default back to my original path. I somehow set this accidentally I guess.
Your bundle config file is located in:
APP_ROOT/.bundle/config
I am trying to use the instructions here to install a pre-released version of a gem with bundler.
The "bundle install" output lists the gem as getting installed, but "gem list" fails to find it.
My Gemfile:
source :gemcutter
gem 'sinatra', '1.1.0', :git => 'http://github.com/sinatra/sinatra.git'
gem 'RedCloth', '4.2.3'
Here is a gist with the rest of my sample code.
Has anyone gotten this scenario to work?
NOTE: I am also using RVM (on OS X). bundle show does list the gem (and dependencies) as existing, but I am not able to properly resolve them.
Thanks.
I would look at the load paths, and further debug from there, example:
...(master) $ irb
irb(main):001:0> $LOAD_PATH.count
=> 8
irb(main):004:0> require 'bundler/setup'
=> true
irb(main):005:0> $LOAD_PATH.count
=> 112
irb(main):006:0>
Bundler configures the load path for you, this means not all the gems are included on your load path by default.
Additionally, from the bundler git help:
Because Rubygems lacks the ability to handle gems from git, any gems installed from a git repository will not show up in gem list. They will, however, be available after running Bundler.setup.
Best regards, hope this helps
ED
Bundler might have installed it locally to your app. This could vary wildly, depending on OS and whether you are using RVM.
What is the output of bundle show sinatra?
In my case, sinatra was installed here:
/home/marshall/.rvm/gems/ruby-1.8.7-p302#3846859/bundler/gems/sinatra-9cfa74a7f352
Sinatra doesn't show in the gems list, but the server launches correctly if I execute rackup.
Gems installed via bundler on Engine Yard go to a different folder to isolate them.
it's usually /data/APP_NAME/shared/bundled_gems
To be sure, check your .bundle/config file on your APP folder at Engine Yard
It looks like there is an issue using Shotgun and Bundler (git repositories only).
If I use rackup to start up my app, all is well. I am going to investigate a little more and then file a bug with one (or both) of the projects.