Vimteractive

vimteractive:	send commands from text files to interactive programs via vim
Author:	Will Handley
Version:	2.7.1
Homepage:	https://github.com/williamjameshandley/vimteractive
Documentation:	:help vimteractive

Vimteractive was inspired by the workflow of the vim-ipython plugin.

This plugin is designed to extend a subset of the functionality of vim-ipython to other REPLs (including ipython). It is based around the unix philosophy of "do one thing and do it well". Vimteractive aims to provide a robust and simple link between text files and language shells. Vimteractive will never aim to do things like autocompletion, leaving that to other, more developed tools such as YouCompleteMe or Copilot.

The activating commands are:

• ipython :Iipython
• julia :Ijulia
• maple :Imaple
• mathematica :Imathematica
• bash :Ibash
• zsh :Izsh
• python :Ipython
• clojure :Iclojure
• apl :Iapl
• R :IR
• sgpt :Isgpt
• gpt-command-line :Igpt
• autodetect based on filetype :Iterm

Commands may be sent from a text file to the chosen REPL using CTRL-S. If there is no REPL, CTRL-S will automatically open one for you using :Iterm.

For some terminals, the output of the last command may be retrieved with CTRL-Y.

Note: it's highly recommended to use IPython as your default Python interpreter. You can set it like this:

let g:vimteractive_default_shells = { 'python': 'ipython' }

Installation

Since this package leverages the native vim interactive terminal, vimteractive is only compatible with vim 8 or greater.

Installation should be relatively painless via the usual routes such as Vundle, Pathogen or the vim 8 native package manager (:help packages). If you're masochistic enough to use Arch/Manjaro, you can install vimteractive via the aur. For old-school users, there is also a package on the vim repo. Depending on your package manager, you may need to run :helptags <path/to/repo/docs> to install the help documentation.

Motivation

IPython and Jupyter are excellent tools for exploratory analyses in python. They leverage the interactivity of the python kernel to allow you to keep results of calculations in memory whilst developing further code to process them.

However, I can't stand typing into anything other than vim. Anywhere else, my screen fills with hjklEB, or worse, I close the window with a careless <C-w>. I want a technique that allows me to operate on plain text files, but still be able to work interactively with the interpreter with minimal effort.

Many Projects achieve this with a varying level of functionality. Vimteractive aims to create the simplest tool for sending things from text to interpreter, and making it easy to add additional interpreters. In particular, my main aim in starting this was to get a vim-ipython like interface to the command line maple.

Usage

To use the key-bindings, you should first disable the CTRL-S default, which is a terminal command to freeze the output. You can disable this by putting

stty -ixon

into your .bashrc (or equivalent shell profile file).

Example usage:

Create a python file test.py with the following content:

import matplotlib.pyplot as plt
import numpy

fig, ax = plt.subplots()
x = numpy.linspace(-2,2,1000)
y = x**3-x
ax.plot(x, y)
ax.set_xlabel('$x$')
ax.set_ylabel('$y$')

Now start an ipython interpreter in vim with :Iipython. You should see a preview window open above with your ipython prompt. Position your cursor over the first line of test.py, and press CTRL-S. You should see this line now appear in the first prompt of the preview window. Do the same with the second and fourth lines. At the fourth line, you should see a figure appear once it's constructed with plt.subplots(). Continue by sending lines to the interpreter. You can send multiple lines by doing a visual selection and pressing CTRL-S.

If you switch windows with CTRL-W+k, you will see the terminal buffer switch to a more usual looking normal-mode buffer, from which you can perform traditional normal mode commands. However, if you try to insert, you will enter the REPL, and be able to enter commands interactively into the prompt as if you had run it in the command line. You can save this buffer if you wish to a new file if it contains valuable output

You may want to send lines to one REPL from two buffers. To achieve that, run :Iconn <buffer_name> where <buffer_name> is a name of buffer containing REPL. If there is only one REPL, you can use just :Iconn.

Supported REPLs

• :Iipython Activate an ipython REPL
• :Ijulia Activate a julia REPL
• :Imaple Activate a maple REPL
• :Imathematica Activate a mathematica REPL
• :Ibash Activate a bash REPL
• :Izsh Activate a zsh REPL
• :Ipython Activate a python REPL
• :Iclojure Activate a clojure REPL
• :Iapl Activate an apl REPL
• :IR Activate an R REPL
• :Isgpt Activate an sgpt REPL
• :Igpt Activate an gpt-command-line REPL
• :Iterm Activate default REPL for this filetype

Sending commands

CTRL-S sends lines of text to the interpreter in a mode-dependent manner:

In Normal mode, CTRL-S sends the line currently occupied by the cursor to the REPL.

In Insert mode, CTRL-S sends the line currently being edited, and then returns to insert mode at the same location.

In Visual mode, CTRL-S sends the current selection to the REPL.

ALT-S sends all lines from the start to the current line.

Retrieving command outputs

CTRL-Y retrieves the output of the last command sent to the REPL. This only implemented in a subset of terminas (:Iipython, :Isgpt and :Igpt)

In Normal-mode, CTRL-Y retrieves the output of the last command sent to the REPL and places it in the current buffer.

In Insert-mode, CTRL-Y retrieves the output of the last command sent to the REPL and places it in the current buffer, and then returns to insert mode after the output.

Connecting to an existing REPL

:Iconn [{buffer] connects current buffer to REPL in {buffer}. You can connect any number of buffers to one REPL. {buffer} can be omitted if there is only one REPL.

]v and [v can be used to cycle between connected buffers in the style of unimpaired.

Common issues

Bracketed paste

If you see strange symbols like ^[[200~ when sending lines to your new interpreter, you may be on an older system which does not have bracketed paste enabled, or have other shell misbehaviour issues. You can change the default setting with

let g:vimteractive_bracketed_paste_default = 0

Options

These options can be put in your .vimrc, or run manually as desired:

let g:vimteractive_vertical = 1        " Vertically split REPLs
let g:vimteractive_autostart = 0       " Don't start REPLs by default

Extending functionality

This project is very much in an beta phase, so if you have any issues that arise on your system, feel free to leave an issue or create a fork and pull request with your proposed changes

You can easily add your interpreter to Vimteractive, using the following code in your .vimrc:

" Mapping from Vimterpreter command to shell command
" This would give you :Iasyncpython command
let g:vimteractive_commands = {
    \ 'asyncpython': 'python3 -m asyncio'
    \ }

" If you see strange symbols like ^[[200~ when sending lines
" to your new interpreter, disable bracketed paste for it.
" You can also try it when your shell is misbehaving some way.
" It's needed for any standard Python REPL including
" python3 -m asyncio
let g:vimteractive_bracketed_paste = {
    \ 'asyncpython': 0
    \ }

" If you want to set interpreter as default (used by :Iterm),
" map filetype to it. If not set, :Iterm will use interpreter
" named same with filetype.
let g:vimteractive_default_shells = {
    \ 'python': 'asyncpython'
    \ }

" If your interpreter startup time is big, you may want to
" wait before sending commands. Set time in milliseconds in
" this dict to do it. This is not needed for python3, but
" can be useful for other REPLs like Clojure.
let g:vimteractive_slow_prompt = {
    \ 'asyncpython': 200
    \ }

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