Error when build gem with exe/command on bundler 1.8.0

[sanemat]

I try to use exe/command, but I met error when I was building gem.

$ bundle gem your-task -b
Creating gem 'your-task'...
      create  your-task/Gemfile
      create  your-task/.gitignore
      create  your-task/lib/your/task.rb
      create  your-task/lib/your/task/version.rb
      create  your-task/your-task.gemspec
      create  your-task/Rakefile
      create  your-task/README.md
      create  your-task/bin/console
      create  your-task/bin/setup
      create  your-task/CODE_OF_CONDUCT.md
      create  your-task/LICENSE.txt
      create  your-task/.travis.yml
      create  your-task/.rspec
      create  your-task/spec/spec_helper.rb
      create  your-task/spec/your/task_spec.rb
      create  your-task/exe/your-task
Initializing git repo in /Users/sane/work/tmp/your-task
$ cd your-task/
$ git commit -m 'initial commit'
$ bundle exec rake build --trace
** Invoke build (first_time)
** Execute build
rake aborted!
WARNING:  See http://guides.rubygems.org/specification-reference/ for help
ERROR:  While executing gem ... (Gem::InvalidSpecificationException)
    ["bin/your-task"] are not files
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/bundler-1.8.0/lib/bundler/gem_hel
per.rb:155:in `sh'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/bundler-1.8.0/lib/bundler/gem_hel
per.rb:70:in `build_gem'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/bundler-1.8.0/lib/bundler/gem_hel
per.rb:39:in `block in install'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/task.rb:240:
in `call'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/task.rb:240:
in `block in execute'  
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/task.rb:235:
in `each'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/task.rb:235:
in `execute'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/2.2.0/monitor.rb:211:in `mon_synchronize'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/task.rb:172:in `invoke_with_call_chain'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/task.rb:165:in `invoke'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:150:in `invoke_task'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `each'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `block in top_level'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:115:in `run_with_threads'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:100:in `top_level'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:78:in `block in run'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/lib/rake/application.rb:75:in `run'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/rake-10.4.2/bin/rake:33:in `<top (required)>'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/bin/rake:23:in `load'
/Users/sane/.anyenv/envs/rbenv/versions/2.2.0/bin/rake:23:in `<main>'
Tasks: TOP => build

my env:

$ bundle env
Environment

    Bundler   1.8.0
    Rubygems  2.4.5
    Ruby      2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin13]
    Git       2.2.1

Bundler settings

    gem.coc
      Set for the current user (/Users/sane/.bundle/config): "true"
    gem.mit
      Set for the current user (/Users/sane/.bundle/config): "true"
    gem.test
      Set for the current user (/Users/sane/.bundle/config): "rspec"

Gemfile

    source 'https://rubygems.org'

    # Specify your gem's dependencies in your-task.gemspec
    gemspec

Gemfile.lock

    PATH
      remote: .
      specs:
        your-task (0.1.0)

    GEM
      remote: https://rubygems.org/
      specs:
        rake (10.4.2)  

    PLATFORMS
      ruby

    DEPENDENCIES
      bundler (~> 1.8) 
      rake (~> 10.0)   
      your-task!

[TimMoore]

Yep, you found a bug in the template.

To fix your gem, you need to add spec.bindir = 'exe' to your gemspec and run chmod +x exe/* in the shell.

Thanks for the report!

[TimMoore]

There's a fix at #3395.

[TimMoore]

Fixed in 1.8.1.