[BUG] powerline-shell prompt eats stdout

Question

[BUG] powerline-shell prompt eats stdout

Opened this issue 6 years ago · 5 comments

As you see, the prompt is eating a line from stdout:

upper -u | cat

My .powerline-shell.json:

{
  "segments": [
    "time",
    "username",
    "ssh",
    "cwd",
    "git",
    "hg",
    "jobs",
    "exit_code",
    "read_only",
    "newline",
    "root"
  ],
  "theme": "~/anaconda/lib/python3.6/site-packages/powerline_shell/themes/solarized_light.py"
}

Answer 1 · 2018-03-29T13:12:53.000Z

What is this upper command?

Answer 2 · 2018-03-29T18:24:13.000Z

It's just the example from the docs, converts a string to uppercase. I can see that it works before the new prompt shows itself.

…

On Thu, Mar 29, 2018 at 5:42 PM, Jakub Dundalek ***@***.***> wrote: What is this upper command? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#68 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/Aii--rUtYOeVoQmsRmxqESELu_zdMuCaks5tjN3XgaJpZM4S_Vc2> .

Answer 3 · 2018-03-29T18:25:28.000Z

@dundalek

(defcmd upper clojure.string/upper-case)

Answer 4 · 2018-03-29T18:48:41.000Z

I see, it is indeed a bug. However, it is not caused by powerline, it is just a bug in the pipeline implementation. I will look into it when I have some more time.

Answer 5 · 2018-04-14T11:09:45.000Z

After some digging it really seems to be caused by a combination of readline+powerline. If the last line of the output does not end with newline, the prompt gets placed on the same line, therefore "eating" the line. The simplest case to reproduce is echo -n x. The bug does not happen with the default plain prompt.