JRuby IRB readline issue on linux under a non-forked PTY #5005
Comments
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IRB is unlikely to work properly within a PTY due to the jline library we normally use. I suspect this would work ok if you run with rb-readline which on JRuby will use true native descriptors and readline-equivalent operations. @enebo We should talk about whether to make our readline be rb-readline on platforms where we can do native IO. |
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Marking for 9.2 since fixing this would likely require moving away from jline. |
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@headius is there something @byteit101 could try like replace |
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Move readline issues to 9.3. |
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This issue is only indirectly related to IRB and has been superseded by #6552, which I discovered while fixing issues in our FFI-based io-console, which I was doing to support the new IRB. |
Environment
rspecandffigems installedTest
I wrote this RSpec test that passes 3/3 on MRI, yet only passes 1/3 on JRuby:
https://gist.github.com/byteit101/241c5bb712c0d28930163ff0d88dc878
Note I had to patch PTY.open to avoid #5004
I think that the cases are fairly self explanatory, but in short it seems that IRB in some instances doesn't interactively support the arrow keys, and double echos, though if you press the keysequence blind and then hit enter, it works despite showing the escape characters.
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