VIM: Save and Run at the same time?

Question

I do a lot of Python quick simulation stuff and I'm constantly saving (:w) and then running (:!!). I'm wondering, is there a way to combine these actions. Maybe a "save and run" command.

Thanks for your help.

Answer 1

Option 1:

Write a function similar to this and place it in your startup settings:

function myex()
   execute ':w'
   execute ':!!'
endfunction

You could even map a key combo to it-- look a the docs.

---

Option 2 (better):

Look at the documentation for remapping keystrokes - you may be able to accomplish it through a simple key remap. The following works, but has "filename.py" hardcoded. Perhaps you can dig in and figure out how to replace that with the current file?

:map <F2> <Esc>:w<CR>:!filename.py<CR>

After mapping that, you can just press F2 in command mode.

imap, vmap, etc... are mappings in different modes. The above only applies to command mode. The following should work in insert mode also:

:imap <F2> <Esc>:w<CR>:!filename.py<CR>a

Section 40.1 of the VIM manual is very helpful.

Answer 2

Okay, the simplest form of what you're looking for is the pipe command. It allows you to run multiple cmdline commands on the same line. In your case, the two commands are write `w` and execute current file `! %:p`. If you have a specific command you run for you current file, the second command becomes, e.g. `!python %:p`. So, the simplest answer to you question becomes:

:w | ! %:p
 ^ ^ ^
 | | |--Execute current file
 | |--Chain two commands
 |--Save current file

One last thing to note is that not all commands can be chained. According to the Vim docs, certain commands accept a pipe as an argument, and thus break the chain...

Answer 3

Use the autowrite option:

:set autowrite

Write the contents of the file, if it has been modified, on each :next, :rewind, :last, :first, :previous, :stop, :suspend, :tag, :!, :make, CTRL-] and CTRL-^ command [...]

Answer 4

Command combination seems to work through | character, so perhaps something like aliasing :w|!your-command-here to a distinct key combination?

Answer 5

Here you go:

:nmap <F1> :w<cr>:!%<cr>

save & run (you have to be in n mode though - just add esc and a for i mode)

Answer 6

Another possibility:

au BufWriteCmd *.py write | !!

Though this will run every time you save, which might not be what you want.

Answer 7

This is what I put in my .vimrc and works like a charm

nnoremap <leader>r :w<CR>:!!<CR>

Of course you need to run your shell command once before this so it knows what command to execute.

Ex:

:!node ./test.js

Answer 8

In vim, you could simply redirect any range of your current buffer to an external command (be it bash, python, or you own python script).

# redirect whole buffer to python
:%w !python

suppose your current buffer contain two lines as below,

import numpy as np
print np.arange(12).reshape(3,4)

then :%w !python will run it, be it saved or not. and print something like below on your terminal,

[[ 0  1  2  3]
 [ 4  5  6  7]
 [ 8  9 10 11]]

Of course, you could make something persistent, eg, some keymaps.

nnoremap <F8> :.w !python<CR>
vnoremap <F8> :w !python<CR>

first one run current line, second one run visual selection, via python interpreter.

#!! be careful, in vim ':w!python' and ':.w !python' are very different, the
first write (create or overwrite) a file named 'python' with contents of
current buffer, the second redirect the selected cmdline range (here dot .,
which mean current line) to external command (here 'python').

for cmdline range, see

:h cmdline-ranges

not below one, which concerning normal command, not cmdline one.

:h command-range

inspired by https://stackoverflow.com/a/19883963/3625404

Answer 9

I got the following from the vim tips wiki:

command! -complete=file -nargs=+ shell call s:runshellcommand(<q-args>)
function! s:runshellcommand(cmdline)
  botright vnew
  setlocal buftype=nofile bufhidden=wipe nobuflisted noswapfile nowrap
  call setline(1,a:cmdline)
  call setline(2,substitute(a:cmdline,'.','=','g'))
  execute 'silent $read !'.escape(a:cmdline,'%#')
  setlocal nomodifiable
  1
endfunction

but changed new to vnew on the third line, then for python i have the following

map <F9> :w:Shell python %<cr><c-w>

hitting f9 saves, runs, and dumps the output into a new vertically split scratch buffer, for easy yanking/saving etc ... also hits c-w so i only have to press h/c to close it / move back to my code.

Answer 10

Try making it inside the Bash.

In case of a C file called t.c, this is very convenient:

vi t.c &&  cc t.c -o t && ./t

The and symbols (&&) ensure that one error message breaks the command chain.

For Python this might be even easier:

vi t.py && python t.py

Answer 11

This will work in insert mode too...

" F5 => Save & Run python3 "
nnoremap <F5> :w <CR> :!sh -c 'python3 %' <CR>
inoremap <F5> <Esc> :w <CR> :!sh -c 'python3 %' <CR>

I use it all the time to test stuff that is just too long to retype in the interpreter ^^

Answer 12

1. Consider switching to IDLE. F5 does everything.

2. Consider switching to Komodo. You can define a command so that F5 does everything.