Cannot write to stdout in binary mode in Windows

[DartBot]

This issue was originally filed by @seaneagan

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See: http://stackoverflow.com/questions/24129102/dart-print-newline-without-carriage-return-on-windows

There are many use cases for writing binary output to stdout. My particular use case is just turning off the newline conversion from LF to CRLF on windows. I want to output unix line endings from a windows dart vm, which is necessary to make certain things work correctly in cygwin (unix-like environment for windows), for example.

Ruby:

http://www.ruby-doc.org/core-2.1.2/IO.html#method-i-binmode

Python:

https://docs.python.org/3.0/library/sys.html#sys.stdout

I noticed IOSink.add already turns off encoding conversion, maybe it could turn off newline conversion as well?

Or maybe add a getter on stdout which returns an IOSink in binary mode?

Something which doesn't mutate the global stdout would be preferable.

[kasperl]

Added Area-Library, Library-IO, Triaged labels.

[nex3]

Issue #23303 has been merged into this issue.

[nex3]

Issue #22471 has been merged into this issue.

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cc @sgjesse.

[nex3]

This is also important for use-cases like emitting actual binary data on stdout, or piping the output from subprocesses that emit their own CR/LF sequences.

Also, as issue #22471 points out, other than Notepad no programs on Windows have trouble with raw LFs in practice.

[kevmoo]

@sgjesse We're hitting this with test. Breaking anything that is using Process.start

[sgjesse]

Fixed in 4205b29.

[nex3]

Awesome, thanks Søren!