If you ever want to exclude or block a specific version of a gem in Bundler, you can.
The syntax for excluding a particular gem version in bundler is super simple:
gem 'gemname', '!= 1.0.1'
This is most useful if you have a gem version that is broken and you want to
exclude it, but don't want to exclude all upgrades. A typical Gemfile
using
this might look like:
gem 'gemname', ['~> 1.0', '!= 1.0.1']
This will allow any versions of gemname
in the 1.x.x
series, except for 1.0.1
.
When the maintainers of gemname
incorporate a fix (hopefully based on your
pull request and release gemname
1.0.2
, you can quickly update your
Gemfile.lock
by running bundle update gemname
. It will automatically stop
the upgrade until there is a version after 1.0.1
.
Here's the code in Bundler that defines the DSL in lib/bundler/version_ranges.rb
in version 1.16
:
ranges = requirement.requirements.map do |op, v|
case op
when "=" then ReqR.new(ReqR::Endpoint.new(v, true), ReqR::Endpoint.new(v, true))
when "!=" then NEq.new(v)
when ">=" then ReqR.new(ReqR::Endpoint.new(v, true), ReqR::Endpoint.new(ReqR::INFINITY, false))
when ">" then ReqR.new(ReqR::Endpoint.new(v, false), ReqR::Endpoint.new(ReqR::INFINITY, false))
when "<" then ReqR.new(ReqR::Endpoint.new(ReqR::ZERO, true), ReqR::Endpoint.new(v, false))
when "<=" then ReqR.new(ReqR::Endpoint.new(ReqR::ZERO, true), ReqR::Endpoint.new(v, true))
when "~>" then ReqR.new(ReqR::Endpoint.new(v, true), ReqR::Endpoint.new(v.bump, false))
else raise "unknown version op #{op} in requirement #{requirement}"
end
end.uniq
{: data-start="46"}
This feature is undocumented in bundler, so thought it worth highlighting briefly.
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