[ruby-core:104367] [Ruby master Bug#12436] newline argument of File.open seems not respected on Windows

Issue #12436 has been updated by jeremyevans0 (Jeremy Evans).


This issue dates to the introduction of the newline code in commit:c26ab1ef1c1129198695edf2212774a084147228.  It looks like `newline: :lf` was originally planned, but never implemented.  However, the state it was left in resulted in `newline: :lf` not raising an ArgumentError (as all other invalid :newline option values do), but just being ignored.  Since I think the behavior that would be desired for `newline: :lf` is already present in `newline: :universal`, it's simple to `newline: :lf` an alias for that.  I submitted a pull request that does that: https://github.com/ruby/ruby/pull/4590

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Bug #12436: newline argument of File.open seems not respected on Windows
https://bugs.ruby-lang.org/issues/12436#change-92603

* Author: Eregon (Benoit Daloze)
* Status: Open
* Priority: Normal
* ruby -v: ruby 2.2.4p230 (2015-12-16 revision 53155) [i386-mingw32]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
----------------------------------------
~~~ruby
File.open("abc", "wt", newline: :lf) { |f|
  f.write "a\n"
  f.puts "b"
}
~~~

will create a file with CRLF newlines, ignoring the newline conversion argument.
It should write only LF instead, like on other platforms when the newline conversion is specified.



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