pull: better handle missing bottles.

If we make a PR in which we're building many formulae (e.g.
https://github.com/Homebrew/homebrew-core/pull/9249) then we may want
to pull those that built and publish their bottles and discard those
that did not. Instead of saying bottles will be published when they
won't and then blowing up just avoid publishing them and print a warning
instead.

Library/Homebrew/dev-cmd/pull.rb

@@ -248,7 +248,6 @@ module Homebrew
       changed_formulae_names.each do |name|
         f = Formula[name]
         next if f.bottle_unneeded? || f.bottle_disabled?
-        ohai "Publishing on Bintray: #{f.name} #{f.pkg_version}"
         publish_bottle_file_on_bintray(f, bintray_creds)
         published << f.full_name
       end
@@ -408,7 +407,12 @@ module Homebrew
     if info.nil?
       raise "Failed publishing bottle: failed reading formula info for #{f.full_name}"
     end
+    unless info.bottle_info_any
+      opoo "No bottle defined in formula #{package}"
+      return
+    end
     version = info.pkg_version
+    ohai "Publishing on Bintray: #{package} #{version}"
     curl "-w", '\n', "--silent", "--fail",
          "-u#{creds[:user]}:#{creds[:key]}", "-X", "POST",
          "-H", "Content-Type: application/json",