Auto merge of #3968 - pmenglund:gem_push_host, r=indirect

make it able to specify gem host with GEM_HOST env

when you in your `.gemspec` specify

```
  if spec.respond_to?(:metadata)
    spec.metadata['allowed_push_host'] = 'https://gems.example.com'
  end
```

you can't use the `bundler` rake tasks, as it can't specify the alternate host. This change picks up the `allowed_push_host` and uses it when pushing.

1 files changed, 8 insertions, 2 deletions

diff --git a/lib/bundler/gem_helper.rb b/lib/bundler/gem_helper.rb
index ab7bcc27a0..ba1323356a 100644
--- a/lib/bundler/gem_helper.rb
+++ b/lib/bundler/gem_helper.rb
@@ -92,8 +92,14 @@ module Bundler
 
     def rubygem_push(path)
       if Pathname.new("~/.gem/credentials").expand_path.exist?
-        sh("gem push '#{path}'")
-        Bundler.ui.confirm "Pushed #{name} #{version} to rubygems.org."
+        allowed_push_host = nil
+        gem_command = "gem push '#{path}'"
+        if spec.respond_to?(:metadata)
+          allowed_push_host = @gemspec.metadata["allowed_push_host"]
+          gem_command << " --host #{allowed_push_host}" if allowed_push_host
+        end
+        sh(gem_command)
+        Bundler.ui.confirm "Pushed #{name} #{version} to #{allowed_push_host ? allowed_push_host : "rubygems.org."}"
       else
         raise "Your rubygems.org credentials aren't set. Run `gem push` to set them."
       end