Bundler reports that gemspec is not valid

[temyers]

Attempting to build serverspec-aws fails with the following error

WARNING:  See http://guides.rubygems.org/specification-reference/ for help
ERROR:  While executing gem ... (Gem::InvalidSpecificationException)
    duplicate dependency on aws-sdk (~> 2), (~> 2) use:
    add_runtime_dependency 'aws-sdk', '~> 2', '~> 2'

Here's my environment:

$ gem list

**\* LOCAL GEMS ***

ansible_spec (0.2.8, 0.2.6)
ast (2.2.0)
aws-sdk (2.2.18, 2.2.16)
aws-sdk-core (2.2.18, 2.2.16)
aws-sdk-resources (2.2.18, 2.2.16)
aws-sdk-v1 (1.66.0)
bigdecimal (1.2.6)
builder (3.2.2)
bundler (1.11.2)
bundler-unload (1.0.2)
ci_reporter (2.0.0)
ci_reporter_rspec (1.0.0)
ci_reporter_test_unit (1.0.0)
coderay (1.1.1)
diff-lcs (1.2.5)
executable-hooks (1.3.2)
ffi (1.9.10)
formatador (0.2.5)
gem-wrappers (1.2.7)
guard (2.13.0)
guard-compat (1.2.1)
guard-rspec (4.6.4)
guard-rubocop (1.2.0)
hostlist_expression (0.2.1)
io-console (0.4.3)
jmespath (1.1.3)
json (1.8.3, 1.8.1)
listen (3.0.6)
lumberjack (1.0.10)
method_source (0.8.2)
mini_portile2 (2.0.0)
multi_json (1.11.2)
nenv (0.3.0)
net-scp (1.2.1)
net-ssh (3.0.2)
net-telnet (0.1.1)
netaddr (1.5.1, 1.5.0)
nokogiri (1.6.7.2)
notiffany (0.0.8)
oj (2.14.5, 2.14.3)
parser (2.3.0.6)
powerpack (0.1.1)
pry (0.10.3)
psych (2.0.8)
rainbow (2.1.0)
rake (10.5.0, 10.4.2)
rb-fsevent (0.9.7)
rb-inotify (0.9.7)
rdoc (4.2.0)
require_all (1.3.3)
rspec (3.4.0)
rspec-core (3.4.3, 3.4.2, 3.4.1)
rspec-expectations (3.4.0)
rspec-its (1.2.0)
rspec-mocks (3.4.1, 3.4.0)
rspec-support (3.4.1)
rubocop (0.37.2)
ruby-progressbar (1.7.5)
rubygems-bundler (1.4.4)
rvm (1.11.3.9)
serverspec (2.29.2, 2.29.0, 2.27.0)
sfl (2.2)
shellany (0.0.1)
slop (3.6.0)
specinfra (2.51.1, 2.49.0, 2.47.1)
test-unit (2.5.5)
thor (0.19.1)
unicode-display_width (0.3.1)
yard (0.8.7.6)

$ ruby --version
ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-linux]

[SaltwaterC]

Hi. Sorry about that. Should probably take out the gemspec file out of the repo. It is generated by a rake task using jeweler. And, of course, fix the task to generate a proper gemspec.

[SaltwaterC]

Found the issue. jeweler is not checking for duplicates when sourcing the dependencies. It can do this from both the rake task itself and from the supplied Gemfile. The issue is: when a dependency is specified in both places, it'll end up twice in the generated gemspec.

I also removed the gemspec from the repo. To generate a fresh one:

bundle install --with development
rake gemspec

However, the issue was not discovered for so long as I was using the rest of the rake tasks supplied by jeweler which don't use the generated gemspec to build/install the gem. From rake -T:

rake build                 # Build gem into pkg/
rake install               # Build and install gem using `gem install`

Also: for the moment I am not pushing this gem to RubyGems as the integration testing against AWS resources got delayed for quite a while and I don't feel like the work for this gem is complete.

[temyers]

Don't know if this is a separate issue, but according to:

https://github.com/bundler/bundler/issues/1880

In order to include a gem from source, it needs to include a gemspec - even if it's generated.

Or should I be using a different process I'm unaware of?

[SaltwaterC]

I can publish the gem to RubyGems to make things easier for everybody. I'll do this after dealing with your PR #3.

[temyers]

Ok that would be great thanks