“gem.add_dependency” for another local gem

问题:

I am creating a gem, which has a dependency on another published gem. In my_gem.gemspec, I have added the dependency to the other gem:

gem.add_dependency "other_gem", "~> 1.0.0"

Now, I found a feature that can be tweaked in other_gem, so I forked the repository, made my changes and committed it to the fork (It has not been pulled into the original repository).

My question is how do I tell my_gem to lookup other_gem locally? The below code snippet is not valid, as :path is not an option in add_dependency call, as mentioned in Gem Specification Reference:

gem.add_dependency "other_gem", "~> 1.0.0", :path => '/path/to/local/other_gem

回答1:

Locally it's much easier: while you're doing development, you can include:

gem "other_gem", :path => '/path/to/local/other_gem'

or

gem "other_gem", :git => "[e-mail]:/your_github/other_gem.git"

in your gemfile, as this should override the gemspec

回答2:

Locally it is not likely possible to give path to the gem dependency because if you are doing so that means you are imposing a restriction to the self made gem that it is depending locally to any other gem.

This is not desirable as when you will upload it, this will not work. So the solution is to add remote dependency in your own plugin's gemspec.

See my SO post for the same here.

回答3:

I would create and install a new other_gem-version, e.g. '1.0.0.Subash_fix' and use it as

gem.add_dependency "other_gem", "= 1.0.0.Subash_fix"

When there is a new official version of the gem with your patch you switch back to the official one:

gem.add_dependency "other_gem", "~> 1.0.1"