Running git commands from ruby script

Question

Kind of a stupid question, but I'm not able to run git commands from a ruby script. Do I need to be sourcing something?

Simple example of script:

   checkout = %x("/usr/bin/git version")
puts checkout

Output:

sh: /usr/bin/git version: No such file or directory

If I run the command from the cmd line it works:

git version 1.7.9.5

Any input appreciated. Thanks.

Use which git to figure out where your git actually resides. — user229044
– user229044 ♦, Commented Apr 3, 2014 at 14:28
This is a bit late, but the reason for the error is the quotes inside your %x, had you done %x(/usr/bin/git version) instead then you would have gotten the git version — jjg
– jjg, Commented Jul 13, 2022 at 23:38

Roman Kiselenko · Accepted Answer · 2014-04-03 14:30:41Z

11

you can use Kernel#system or Kernel#exec or this quotes ``:

  $> irb
  => `git status`
  => "# On branch develop\nnothing to commit, working directory clean\n"
  => system('git version')
  => git version 1.8.3.4 (Apple Git-47)
  => exec('git version')
  => git version 1.8.3.4 (Apple Git-47)

in script:

#!/usr/bin/env ruby
puts system('git version')
puts `git version`
puts exec('git version')

output:

git version 1.8.3.4 (Apple Git-47)
true
git version 1.8.3.4 (Apple Git-47)
git version 1.8.3.4 (Apple Git-47)

edited Apr 3, 2014 at 14:30

answered Apr 3, 2014 at 14:25

Roman Kiselenko

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3 Comments

user797963 Over a year ago

Nah, I need to run git commands on arguments I pass to a script. irb won't work for me here...

user229044 Over a year ago

@user797963 IRB is just being used as an example, anything you write in IRB can be copy-pasted into a Ruby script and run from there. It's identical.

akatakritos Over a year ago

Be warned that exec will not return. If you plan to do anything with the results of your git call, you need to use a different method like system or the backticks.

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