Ruby: Run script from bash script?

Question

I'm trying to call a Ruby script from a bash script, but no luck.

#!/bin/bash
ruby -v

works just fine, so I know that it's not Ruby, but

#!/bin/bash
ruby bash_test.rb

does not. Here's the fun part:

john@starfire:~/Desktop$ bash ubuntu_cmds.sh
(LoadError)h file or directory -- bash_test.rb
john@starfire:~/Desktop$ ls *.rb
bash_test.rb

Both files are sitting on my desktop.

ruby bash_test.rb

works just fine, too.

I'm new to bash scripting, so I'm pretty sure that I'm just making a stupid error.

I'm running Ubuntu 10.10 with Ruby 1.8.7. Thanks in advance for any help or advice.

EDIT: Deleted the .sh and the .rb and started over, and made sure to chmod +x the .sh, and it worked on the first try. I have no idea why. Thanks for the help, though.

Please see my edit; the best way to format blocks of code is to indent them by 4 spaces, or select them and press the {} button. — user229044
– user229044 ♦, Commented Mar 8, 2011 at 18:10
For the benefit of those looking for the {} button on their keyboard, @meagar's referring to the icon above the question editor. — Andrew Grimm
– Andrew Grimm, Commented Mar 8, 2011 at 22:16

rubyprince · Accepted Answer · 2011-03-08 18:20:43Z

5

try

#!/bin/bash
ruby ~/Desktop/bash_test.rb

answered Mar 8, 2011 at 18:20

rubyprince

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1 Comment

eckza Over a year ago

(LoadError)h file or directory -- /home/john/Desktop/bash_test.rb :P Should've mentioned that I tried that already.

Chaim Geretz · Accepted Answer · 2011-03-08 19:12:13Z

3

Do you have a carriage return in the bash script after the file name ?

EDITED

Double check how the filename is being passed to ruby in the bash script.

Error output should be as below if the file wasn't found

ruby: No such file or directory -- bash_test.rb (LoadError)

From what you are displaying as an error it appears that there is a carriage return that is being assumed by ruby as part of the filename so you are getting the following error output.

 (LoadError)h file or directory -- bash_test.rb

edited Mar 8, 2011 at 19:12

answered Mar 8, 2011 at 18:34

Chaim Geretz

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2 Comments

Dennis Williamson Over a year ago

@kivetros: It's not "do you" it's "you do". Run dos2unix against your script.

eckza Over a year ago

I ended up just deleting both the script and the .rb and starting over... mysteriously enough, both worked just fine on the first try. dos2unix is really cool, though - thanks for the heads-up on that.

Andrew Grimm · Accepted Answer · 2011-03-08 22:18:50Z

3

You may have to do ruby ./bash_test.rb, as sometimes . isn't in your $PATH.

answered Mar 8, 2011 at 22:18

Andrew Grimm

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