gem2rpm fails for google-protobuf

[Hextremist]

This is in fedora 27. Looks like gem2rpm makes some assumptions about the name of the gem file which is not right for this package.

$ cd ~/rpmbuild/SPECS
$ gem fetch google-protobuf
Fetching: google-protobuf-3.5.1.2-x86_64-linux.gem (100%)
Downloaded google-protobuf-3.5.1.2-x86_64-linux
$ gem2rpm google-protobuf-3.5.1.2-x86_64-linux.gem  >~/rpmbuild/SPECS/protobuf.spec
$ rpmbuild -bs ~/rpmbuild/SPECS/protobuf.spec
error: File /home/kjell/rpmbuild/SOURCES/google-protobuf-3.5.1.2.gem: No such file or directory

[voxik]

This is more or less RubyGems which makes some assumption and prefers platform specific version of gem. But for packaging, you should always do gem fetch google-protobug --platform=ruby for gems which provides platform specific versions of gems.

However, not sure if gem2rpm -f google-protobuf > ~/rpmbuild/SPECS/protobuf.spec (the -f param makes gem2rpm to fetch the package) is doing the right thing.

[Hextremist]

Hi,
You are right, and I am sorry :) -f seems to work fine. May I still suggest failing with an error message instead of generating a .spec file that does not work?

[voxik]

I don't target 100% success rate for gem2rpm. But this is definitely interesting case, so I'll keep this ticket open and will see what we can do about it.