iTerm2 Shell Integrations don't play well with show-mode-prompt in Bash

By magic...@overblown.net on February 27, 2015 01:25 (imported from Google Code)

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Recent versions of Bash (>= 4.3, I believe) have added support for the Readline option 'show-mode-prompt'. Adding Recent versions of Bash (>= 4.3, I believe) have added support for the Readline option 'show-mode-prompt'. Adding set show-mode-prompt onRecent versions of Bash (>= 4.3, I believe) have added support for the Readline option 'show-mode-prompt'. Adding `set show-mode-prompt on to your ~/.inputrc or /etc/inputrc file will cause Bash to prepend your prompt with a character indicating the current Readline mode: "@" for emacs, ":" for vi command, or "+" for vi insertion.

I've found that if I have iTerm2's shell integrations installed, then my prompt will be re-displayed every time the mode character changes.

The expected behavior is that, with Recent versions of Bash (>= 4.3, I believe) have added support for the Readline option 'show-mode-prompt'. Adding set show-mode-prompt on to your ~/.inputrc or /etc/inputrc file will cause Bash to prepend your prompt with a character indicating the current Readline mode: "@" for emacs, ":" for vi command, or "+" for vi insertion.

I've found that if I have iTerm2's shell integrations installed, then my prompt will be re-displayed every time the mode character changes.

The expected behavior is that, with set editing-mode viRecent versions of Bash (>= 4.3, I believe) have added support for the Readline option 'show-mode-prompt'. Adding set show-mode-prompt on to your ~/.inputrc or /etc/inputrc file will cause Bash to prepend your prompt with a character indicating the current Readline mode: "@" for emacs, ":" for vi command, or "+" for vi insertion.

I've found that if I have iTerm2's shell integrations installed, then my prompt will be re-displayed every time the mode character changes.

The expected behavior is that, with `set editing-mode vi in my ~/.inputrc, my prompt will start with a "+" in front of it. Then, if I press "esc" to enter vi command mode, that "+" will turn into a ":", without anything else changing.

Instead, with the shell integrations installed, my shell opens with "+" displayed on the line above my prompt, not next to it. Then, when I press "esc", a ":" character overwrites the first character of my current prompt, then my cursor moves down a line my prompt is re-printed (without any mode character). If I have text on the current line and change modes, my cursor is still in the same horizontal position, but moved down vertically.

I am running "Build 2.9.20150224-nightly" on Mac OS X 10.9.5. My Bash version is "4.3.33(1)-release", and my Readline version is "stable 6.3.8 (bottled)", both installed via HomeBrew.

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com.googlecode.iterm2.plist

debuglog.txt.gz

Comment 1 by gnach... on March 01, 2015 23:48

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I'm trying to reproduce the issue. Here's what my environment looks like:

bash-4.3$ which bash
/usr/local/bin/bash
bash-4.3$ echo

There was an error rendering this math block. KaTeX parse error: Undefined control sequence: \s at position 7: PS1 \̲s̲-\v\$ bash-4.…

cat ~/.inputrc
set show-mode-prompt on
bash-4.3$ bash --version
GNU bash, version 4.3.33(1)-release (x86_64-apple-darwin14.1.0)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

But my prompt remains unchanged:

Milestone changed to Ship 3.0

Reassigned to @gnachman

Assignee removed

Status changed to closed

I've reproduced the issue. When my ~/.inputrc was empty and executed the "set show-mode-prompt on" command nothing happened. The mode prompt didn't get enabled.

Last login: Tue Feb  7 09:10:12 on ttys000
-bash-4.4$ which bash
/usr/local/bin/bash
-bash-4.4$ echo $PS1
\s-\v$
-bash-4.4$ cat ~/.inputrc
-bash-4.4$ cat ~/.bashrc
PS1="\s-\v\$ "
-bash-4.4$ set show-mode-in-prompt on
-bash-4.4$ bash --version
GNU bash, 4.4.12(1)-release (x86_64-apple-darwin16.3.0) verzió
Copyright (C) 2016 Free Software Foundation, Inc.
A licenc GPLv3+: a GNU GPL 3. vagy újabb változata
<http://gnu.org/licenses/gpl.html>

Ez egy szabad szoftver, terjesztheti és/vagy módosíthatja.
NINCS GARANCIA, a törvény által engedélyezett mértékig.
-bash-4.4$

When my ~/.inputrc contained "set show-mode-prompt on" the mode prompt was enabled from the start.

Last login: Tue Feb  7 09:06:10 on ttys000
@
-bash-4.4$ which bash
/usr/local/bin/bash
@
-bash-4.4$ echo $PS1
\s-\v$
@
-bash-4.4$ cat ~/.inputrc
set show-mode-in-prompt on
@
-bash-4.4$ cat ~/.bashrc
PS1="\s-\v\$ "
@
-bash-4.4$ bash --version
GNU bash, 4.4.12(1)-release (x86_64-apple-darwin16.3.0) verzió
Copyright (C) 2016 Free Software Foundation, Inc.
A licenc GPLv3+: a GNU GPL 3. vagy újabb változata
<http://gnu.org/licenses/gpl.html>

Ez egy szabad szoftver, terjesztheti és/vagy módosíthatja.
NINCS GARANCIA, a törvény által engedélyezett mértékig.
@
-bash-4.4$

• iTerm2 version: Build 3.0.20170205-nightly
• OS version: macOS 10.12.3

com.googlecode.iterm2.plist

without_inputrc_-_debuglog.txt

with_inputrc_-_debuglog.txt

Please see the solution here: https://groups.google.com/forum/#!msg/iterm2-discuss/ptHw9f_QRho/A9kFGjaEAAAJ

reopened

Awesome! Thanks!

changed milestone to %Review for next version

The fix doesn't work on the current iterm2 version (3.0.15)

@c44u4me I bet something else is interfering. With an empty .bashrc and an .inputrc that contains only set show-mode-in-prompt on and Insert newline before start of command prompt if needed turned off, 3.0.15 works correctly.