Fix single source file in binary predicate

[blackm00n]

Fixing #376 issue.

“ 1| <NUMBER>|<CODE>” line (corresponds to Xcode 9.3 xcrun llvm-cov show output) should be detected as !path_on_first_line?. Previous path_on_first_line? implementation returns true for that example failing to process single source binary.

[coveralls]

Coverage remained the same at 95.732% when pulling 4fa17e2 on blackm00n:fix.single.source.file.predicate into 720adee on SlatherOrg:master.

[blackm00n]

@ksuther could you please take a look when you have time? Thank you!

[ksuther]

Will do, thanks for the PR!

[ksuther]

Thank you!

[svendr]

Awesome work, would be great to get a release for this!

[jn-se]

Seems not to work for me.

I found three places in code that needs to be fixed:

./usr/local/lib/ruby/gems/2.4.0/gems/slather-2.4.5/lib/slather/profdata_coverage_file.rb:45:in source_file_pathname': undefined method each' for nil:NilClass (NoMethodError)

./usr/local/lib/ruby/gems/2.4.0/gems/slather-2.4.5/lib/slather/coverage_info.rb:74:in source_file_pathname_relative_to_repo_root': undefined method realpath' for nil:NilClass (NoMethodError)

./usr/local/lib/ruby/gems/2.4.0/gems/slather-2.4.5/lib/slather/coverage_service/cobertura_xml_output.rb:35:in `dirname': no implicit conversion of nil into String (TypeError)

[blackm00n]

@jn-se I have a similar problem on Xcode 9.3.1 now, investigating now

[dunyakirkali]

I also have the same issue on 9.3.1

[mkchoi212]

Same here. I'm on 9.3.1. and getting
Errno::ENOENT: No such file or directory @ realpath_rec - /Users/mikechoi/project_name 1| |