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Bug #9988
closedCSV does not write headers when :write_headers is true and no rows are added
ruby -v:
ruby -v: ruby 2.1.2p95 (2014-05-08 revision 45877) [i386-openbsd]
Backport:
Description
When the CSV :write_headers option is used, headers are only added if at least one row is added:
$ ruby -r csv -e "p CSV.generate(:headers=>%w'a b c', :write_headers=>true){|csv|}"
""
$ ruby -r csv -e "p CSV.generate(:headers=>%w'a b c', :write_headers=>true){|csv| csv << []}"
"a,b,c\n\n"
This seems like a bug to me. It should write the headers even if there are no rows. The attached patch does that:
$ ruby -I lib -r csv -e "p CSV.generate(:headers=>%w'a b c', :write_headers=>true){|csv|}"
"a,b,c\n"
The attached patch should probably be refactored to avoid the duplication, but I think that is best left to the csv maintainer.
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