Capturing output of shell command in Vim

Question

I'm trying to write a function that will accept a gem name and run Ctrl-P in the directory of that gem based on what Bundler shows. Right now I'm stuck on how to capture the output from the shell command.

So far I have:

function! GemCtrlP(gem_name)
   execute '!bundle list ' . a:gem_name
endfunction

I want to save the output of the of that bundle call and then pipe that into CtrlP. I can do the CtrlP part, but I'm not sure how to capture the shell output

Any ideas?

Christian Brabandt · Accepted Answer · 2015-03-04 18:00:36Z

6

Capturing arbitrary vim commands can be achieved by using the :redir command. For shell commands, it is usually easier to use the system() function.

See the help at

:h :redir
:h system

There should be enough examples in the help (or look at some plugins).

answered Mar 4, 2015 at 18:00

Christian Brabandt

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4 Comments

Josh Bodah Over a year ago

It seems like system is actually showing a null character or something: async_job-7ba2b1e64340^@. Is there a way to strip that extra ^@ out? I'm looking at ag.vim for examples, but I can't seem to figure it out

Christian Brabandt Over a year ago

Those are probably binary nulls. Recent Vims replace those by SOH (0x01). You should be able to strip those using substitute() function

Josh Bodah Over a year ago

Was able to just pipe it into tr

Christian Brabandt Over a year ago

@576i indeed, but you not always want to have the output thrown into your actual document.

Josh Bodah · Accepted Answer · 2015-03-04 19:55:01Z

1

More thorough version of what Christian posted:

function! GemCtrlP(gem_name)
  let path = system('bundle list ' . a:gem_name . ' | tr -d "\n"')
  execute 'CtrlP ' . path
endfunction

edited Mar 4, 2015 at 19:55

answered Mar 4, 2015 at 18:31

Josh Bodah

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