To help understand the source code of various gems I often want to place various puts statements in the source code or even try using the ruby debugger.
But whats the best way of doing this?
Do you clone the project from github and make changes locally, if so how do you "force" the use of the local cloned code over the local gem on your machine. Do I just create some scripts that explicitly require the path of the cloned repos folder?
Or do should I use rvm to create a temp gemset, download the gem and modify it directly?
Are there any other methods ive overlooked? How would this change for gems designed for use within rails projects.
The way I usually do it when I want to make changes to a Gem:
Fork the repository on Github
Check it out and create a new branch for local changes
Use Bundler to manage dependencies for the project which uses the Gem
Change one line in the Gemfile to make it use the forked version of the Gem:
gem "thegem", :git => "git://github.com/name/thegem.git", :branch => 'mybranch'
or
gem "thegem", :git => "file:///path/to/thegem", :branch => 'mybranch'
with /path/to/thegem being the path to your local working copy.
The advantage is that you now already have a the perfect infrastructure set up for contributing your changes through a pull request :)
With Bundler.
In a Rails app simply edit the Gemfile and add:
gem "gem_name", :path => "~/MyGems/gem_name"
PS: Bundler work with any Ruby project.
You can use rvm to create a temp gemset, download the gem and modify it directly. A fast way to view/modify a gem is using gemedit :
Install:
gem install gemedit
Usage:
gem edit devise
or: gem edit devise -e mate
Related
I added some gem I wrote in my local gem repo (some ~/.rvm/gems/ruby-2.0.0-p195/gems path), but when I require it in my RubyMine project, it is not found and indeed it does not appear in my RubyMine loaded gems, and I can't find how to add it. How can I circumvent this ?
There may be several things to try here - hard to tell what you have already done.
In RubyMine Tools > Bundler > Update
make sure you've got the gem in your Gemfile - either locally, or on a specific github repo...
gem 'mygemname', :path => '../myGem'
gem 'myGitGem', :git => 'git#github.com:MYREPOS/mygitgem.git'
Where are the gem files located ?
I'm new to rails and trying o understand how the whole gem functionality works.
My question is how can i follow a gem installation in order to confirm a gem is been installed ?
Where are the installed files located ?
From within your rails app, you can list out all of the gems being used, their versions, and the local path:
bundle show --paths
There's no reason to modify any of these files though. Configuration is typically done through an initializer in /app/initializers, but it depends on the gem being used.
If you need to modify something about the gem, you should fork it on Github and then reference the git location in your Gemfile until your pull request makes it back into the gem:
gem 'some_gem', '4.1.1', git: 'https://github.com/some_github_repo/some_gem.git'
I want to use cloudmade gem but it is not stored in rubyforge so I have to download the .gem and to gem install cloudmade.gem.
Questions:
1)Is it wise to commit this to git repo so that others can use it as well?
1a) If yes, where should I put the gem in my rails app?
1b) If not, how should I share this with other people so that they won't have error when they do 'bundle install'
Best way IMHO :
clone the repo in Github,
in your Gemfile, add the path to your git depo using something like :
gem "abc", :git => "https://github.com........"
So that your team will be able to work on the project.
Try to contact the author of the gem to know if you can be the new maintainer of the gem.
Then upload it on Rubygems if you want.
I want to use ebayapi gem (https://github.com/codyfauser/ebay) with my rails 3.1 application.
If I add the gem in the Gemfile, rails doesn't run.
/Users/ssk/.rvm/gems/ree-1.8.7-2011.03/gems/money-1.7.1/lib/support/cattr_accessor.rb:7:in `cattr_reader': undefined method `id2name' for {:instance_writer=>true}:Hash (NoMethodError)
I removed the ebayapi gem and tried "require 'ebay'" but it said that "no such file to load".
Ebayapi gem works only with money 1.7.1 and I think that conflicts with rails 3.1 (maybe 3.0 as well).
Is there a way to workaround?
Thanks.
Sam
If it's truly incompatible, and you're up to fixing it yourself, then fork the projects in question on github, and update your Gemfile to point to your git repo (or even a local path to make editing a lot easier).
Here's an example:
gem 'money', :path => "~/dev/ruby/gems/money"
# or
gem 'money', :git => "git://github.com/my_account/money.git"
Once you've fixed it, send a pull request to the original project so they can include the fix.
Let's say I want to add some new features to Rails. According to the Rails Guide on how to contribute to Rails, I should clone the main repository, create a branch, then make my changes in that branch.
My question is: after I've done all of that, how do I go about testing my changes in an actual Rails application? That is, how do I get a Rails application running on my machine to use the Rails code from my branch rather than the Rails code installed on my system?
The simplest approach I can think of is to simply replace the "rails" folder in my gems folder with the code from my branch, but it seems like there should be a cleaner way to do this.
If you're using bundler, just point to your modified version in your Gemfile by specifying either the path of the gem on the filesystem or your forked git repo. Like this:
gem 'rails', :path => '/full/path/to/mofidied/rails'
or for git:
gem 'rails', :git => git://github.com/github_user/your_rails.git
If you change the minor revision number and install it in your gems folder you can specify that new version when you create a new app
rails _3.0.x_ new newappname