Something strange is happening, everything used to work fine a few hours ago.
I have a private gem as dependency to a project. I've added the private gem git repo as follows:
gem 'my-awesome-gem', '>=1.2.3', git: 'https://john:pass123#bitbucket.org/johndoe/my-awesome-gem'
When doing bundle install it shows:
...
Using my-awesome-gem 1.2.3 from https://john:pass123#bitbucket.org/johndoe/my-awesome-gem (at master#bc19e27)
Bundle complete! 5 Gemfile dependencies, 21 gems now installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.
But this gem doesn't show when I do gem list. Also, when I do pry -r my-awesome-gem or require it in the project it returns:
! Unable to load application: LoadError: cannot load such file -- my-awesome-gem
/Users/johndoe/.rbenv/versions/2.4.1/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- my-awesome-gem (LoadError)
...
I've been playing around for a few hours but can't find the problem. I've tried reinstalling ruby via rbenv. I'm using Ruby 2.4.1 via rbenv.
What am I doing wrong?
When using Bundler you must engage Bundler in any code you use. That means either:
require 'bundler/setup'
require 'my-awesome-gem'
Or:
pry -r bundler/setup -r my-awesome-gem
The gem is installed, it's just not in your $LOAD_PATH until you get Bundler to load in the Gemfile and find all the dependencies.
Related
I'm not a Ruby person, so this may be a 101 question. I'm just trying to use a utility that happens to be written in Ruby.
I'm using tilemaker, a utility in the openstreetmap ecosystem. It creates tiles in the mbtiles format. The repository comes with a simple utility to serve the tiles on a browser to test the files you create. This utility is written in Ruby, and is what I'm having trouble with.
The repo's README has instructions for the server utility. The installation instructions read:
(If you don't already have them, you'll need to install Ruby and the required gems to run the demonstration server. On Ubuntu, for example, sudo apt install sqlite3 libsqlite3-dev ruby ruby-dev and then sudo gem install sqlite3 cgi glug rack.)
I'm on Debian 11 (on Qubes, so I don't mind running sudo gem install as they recommend). I hope this is close enough to Ubuntu but maybe this is related to the problem.
This is what I get:
$ ruby server.rb ~/countries-raster.mbtiles
Starting local server
Traceback (most recent call last):
3: from server.rb:22:in `<main>'
2: from server.rb:118:in `<class:MapServer>'
1: from /usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb:85:in `require'
/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb:85:in `require': cannot load such file -- rack/handler (LoadError)
What am I missing here? Thanks.
It appears that the issue is that you are using a 3.X release of rack.
According to the CHANGELOG as of version 3.0 Rack::Handler was removed from rack and pulled out into its own gem (rackup).
To resolve the issue you will need to either use an older version of rack
gem 'rack', '~> 2.2'
Or you will need to add the rackup gem as a dependency:
gem 'rack'
gem 'rackup'
Either option will provide access to rack/handler:
rack (2.2.5) - Source
rackup (0.2.3) - Source
for a better setup under your user, this could be done:
ensure to have ruby running under your user by:
ruby -v # 2.7 or higher is better
then create a file besides your script server.rb called Gemfile:
# Gemfile
source "https://rubygems.org"
gem "rack"
gem "sqlite3"
gem "cgi"
gem "glug"
After that, ensure to have bundler installed (this is a gem to manage gem versioning), by:
gem install bundler
If you face a permission error, is because your ruby program is under root user. So you can use via sudo bundle install, but anything else must be run under sudo, or you can install and setup rvm which will install and configure ruby under your user.
After installing you can call:
bundle install
# will install all the gems needed and will lock the latest versions for you inside Gemfile.lock
run your server by:
bundle exec ruby server.rb
by running via bundle exec your telling to ruby to use the gems installed and versioned by the Gemfile.lock. This guarantees to your software to require the specific versions and avoid collisions or anything else.
I have a project where we are building a custom gem which is hosted on a private gemserver (gemfury). This gem is a dependency in multiple Gemfiles where I need to run tests.
So I have a Gemfile that looks like this:
source "https://rubygems.org"
source 'https://gem.fury.io/custom/' do
gem 'my-custom-gem', '0.0.42'
end
gem 'aws-sdk-iotdataplane', '~>1.15.0'
gem 'bson', '~>4.4.2'
gem 'mongoid', '~>6.1.1'
.
.
.
I build and install the gem locally with rake install (which works fine) and then attempt to run bundle install on the above Gemfile.
I get the following error:
$ bundle install
Fetching gem metadata from https://gem.fury.io/custom/..
Could not find gem 'my-custom-gem (= 0.0.42)' in rubygems repository https://gem.fury.io/custom/ or installed locally.
The source contains the following versions of 'my-custom-gem': 0.0.1, 0.0.4
It is my understanding that if the gem is installed locally on the system, bundler should not attempt to fetch it from the source.
Is this correct?
If I remove the custom source block from around the gem line, it will use the local gem and the fact that the error message says "... or installed locally" really seems to suggest this should work.
I've had some trouble with gems from a local source before, so set up a simple test project. I haven't had simple-rss installed before. This is my Gemfile:
source 'https://rubygems.org'
gem 'simple-rss', :path => '~/code/simple-rss'
I then run bundle install, it tells me:
Using simple-rss 1.2.3 from source at `~/code/simple-rss`
Using bundler 1.12.4
Bundle complete! 1 Gemfile dependency, 2 gems now installed.
So then I make test.rb in the same folder as the Gemfile. The test.rb file only has the require right now:
require 'simple-rss'
I run ruby test.rb, and get this error:
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- simple-rss (LoadError)
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from test.rb:1:in `<main>'
So that's the first evidence of a problem. I then do:
sudo gem install simple-rss
That successfully installs it. I do ruby test.rb again, and get no issues. So it's able to run the gem from the original source once it's been installed with gem install, but not from the local source after running with Bundler.
If you want to use the gems dictated in your Gemfile, I suggest prefixing your commands with bundle exec, eg. bundle exec ruby test.rb. Otherwise your Ruby will not know about them.
I cannot require a custom gem I developed to a ruby project. I use RVM. Here's what I've done:
I added gem locally via Gemfile:
gem 'my-gem', git: 'https://github.com/username/my-gem.git'
I installed the gem:
bundle
Fetching https://github.com/username/my-gem.git
Fetching gem metadata from https://rubygems.org/............
Fetching version metadata from https://rubygems.org/..
Resolving dependencies...
Using my-gem 0.1.0 https://github.com/username/my-gem.git (at master#dcdac02)
Using bundler 1.11.2
Bundle complete! 1 Gemfile dependency, 2 gems now installed.
I confirmed it was installed:
bundle show my-gem
/Users/myuser/.rvm/gems/ruby-2.2.2/bundler/gems/my-gem-dcdac02a8b69
I confirmed my gem paths:
GEM PATHS:
- /Users/myuser/.rvm/gems/ruby-2.2.2
- /Users/myuser/.rvm/gems/ruby-2.2.2#global
When I run gem list, my gem is missing. When I require 'my-gem', the gem cannot be found.
When I run gem which my-gem, I get:
ERROR: Can't find ruby library file or shared library my-gem
I'm not really sure what else to try. Any ideas?
Rubygems have no concept of git installed gems, so Bundler includes a specific mechanism for loading these paths into the GEMPATH, you need to do the following before you can require them:
require 'bundler'
Bundler.setup
See the Bundler git gems docs for more info.
I would make sure the installed version of the gem has all the files you expect, especially lib and its contents. This past discussion might help you:
gem which cannot find gem despite it being installed
I found a similar issue
bundle show kubernetes_metadata_filter
/fluentd/vendor/bundle/ruby/2.3.0/bundler/gems/fluent-plugin-kubernetes_metadata_filter-0cd7e29eacec
while the rest of my gems were install here:
/fluentd/vendor/bundle/ruby/2.3.0/gems/
notice the subtle difference between 2.3.0/bundler/gems/... and 2.3.0/gems/......
HACKY SOLUTION:
after bundle install, i did the following:
gem install specific_install
gem specific_install -l <url to a github gem>
That did the trick and installed the gem to the gems directory, and not just bundler. I beleive the correct fix is the project needs to require bundler on startup, then it will get the bundler installed gems as well, but not all projects are well suited for that solution. good luck!
I just got Ruby motion, and I wanted to try out Cocoapods. I installed it just as it asks on the website:
http://www.rubymotion.com/developer-center/articles/cocoapods/
I add
require 'motion-cocoapods' to my simple 'Hello' project. And I get this error when trying to rake it:
rake aborted!
Unable to activate cocoapods-0.16.1, because rake-10.0.3 conflicts with rake (~> 0.9.4)
I guess this has something to do with my version of rake, but I have no idea what I need to do to fix this problem. Please help!
This is caused by having a version of rake newer than 0.9.x installed. When you just run rake, it loads up the newest version (10.0.3 in your case). Then, when the cocoapod gem tries to load, it tries to activate rake 0.9.x and fails (the ~> 0.9.4 means that it will accept any version starting with 0.9.).
One solution would be to completely remove the rake gem and install the 0.9.4 version explicitly:
gem uninstall rake
gem install rake --version '0.9.6'
However, this could become an issue if you have any other projects that require a newer version of rake. A better solution would be to use Bundler:
gem install bundler
Create a Gemfile in your project folder containing:
source :rubygems
gem 'rake'
gem 'motion-cocoapods'
Add the following to Rakefile, immediately under the require 'motion/project' line:
require 'bundler'
Bundler.require
Then run bundle install from the console. This will lock this specific project on rake 0.9.6. The only catch is that you'll probably need to prefix all of your rake commands with bundle exec.
I was able to solve this issue by following the steps on this japanese blog:
http://blog.amacou.net/post/37702092871/rubymotion-cocoapods-rake
First uninstall:
gem uninstall motion-cocoapods
gem uninstall cocoapods
download cocoapods :
git clone git://github.com/CocoaPods/CocoaPods.git
find the gemspec file
and change this:
s.add_runtime_dependency 'rake', '~> 0.9.4'
to this:
s.add_runtime_dependency 'rake', '> 0.9.4'
then install it as a gem
rake gem:install
then reinstall motion-cocoapods:
gem install motion-cocoapods
My feeling is this is a hack though, and I'm worried it could cause problems else where. If anyone has a better answer, please post it.