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I have this script here:

tmux send-keys "${@:1}" Enter sleep 2.5; tmux capture-pane -p -S -32767

This script captures the tmux pane and prints the output. I noticed that if the tmux pane isn't opened, the output would look like this:

L 05/15/2018 - 16:07:43 : "thebravelittleMercen ary<348><[U:1:313493299 ]><Blue>" say "!resizem ytorso" BOI: !resizemyhands L 05/15/2018 - 16:07:44 : "BOI<377><[U:1:453920 082]><Red>" say "!resiz emyhands"

In reality, it should look like this: 

L 05/15/2018 - 16:07:43: "thebravelittleMercenary<348><[U:1:313493299]><Blue>" say "!resizemytorso" BOI: !resizemyhands L 05/15/2018 - 16:07:44: "BOI<377><[U:1:453920082]><Red>" say "!resizemyhands"

It is worth mentioning that when I do tmux attach and capture the pane, the output lines have the same length as my console width: http://i.cubeupload.com/Rp1BEU.png

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  • 1
    Maybe try capture-pane -J... Commented May 16, 2018 at 0:35
  • 1
    Oh that worked. I probably skipped through some important stuff in the manual Commented May 17, 2018 at 0:02
  • In some manual pages the option is buried, so possibly not easy to find either :) Commented May 18, 2018 at 4:41

1 Answer 1

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9

The output is "wrapped" in the pane, so you'll want to use:

capture-pane -J

-J joins wrapped lines and preserves trailing spaces at each line's end.

↳ https://docs.oracle.com/cd/E86824_01/html/E54763/tmux-1.html

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On tmux 3.1c -J adds a bunch of trailing spaces to the end of most lines, seems to pad everything to 68 chars on a minimal terminal test with just echo a, so it's not ideal either.

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