Something is wrong with `#!`(shebang)(hashbang) in ruby script

Question

I have a ruby script with following content:

#!/data1/thirdparty/ruby/bin/ruby -I/data1/thirdparty/ruby/lib/ruby/2.0.0 -I/data1/thirdparty/ruby/lib/ruby/gems/2.0.0/gems/ruby-net-ldap-0.0.4 -I/data1/thirdparty/ruby/lib/ruby/site_ruby/2.0.0 -I/data1/thirdparty/ruby/lib/ruby/2.0.0/i686-linux

When I ran the script it throws the following error:

<internal:gem_prelude>:1:in `require': cannot load such file -- rubygems.rb (LoadError)
        from <internal:gem_prelude>:1:in `<compiled>'

I took an strace of the program and found this in the strace:

open("/data1/thirdparty/ruby/lib/ruby/2.0.0 -I/data1/thirdparty/enc/encdb.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or directory)

So it seems like ruby is not able to handle -I properly because it is including it in the file path itself. How can I force the script to use -I as an include path directive?

This has nothing to do with Ruby. It is about how to use your operating system properly, and thus belongs on [SuperUser](http://superuser.com/). It's basically just a variation of "how do I call programs in my shell". — Jörg W Mittag, Oct 05 '15 at 06:56

score 1 · Answer 1 · edited Jun 20 '20 at 09:12

I would work with rvm and bundler. You can then call your script with a rvm-wrapper (for example if run in a cron job), or with bundle exec for development. You will need to have your *.gemspec well configured (for an example run bundle new mygem and look at mygem.gemspec).

The other possibility would be to write a shell script including

/data1/thirdparty/ruby/bin/ruby -I/data1/thirdparty/ruby/lib/ruby/2.0.0 -I/data1/thirdparty/ruby/lib/ruby/gems/2.0.0/gems/ruby-net-ldap-0.0.4 -I/data1/thirdparty/ruby/lib/ruby/site_ruby/2.0.0 -I/data1/thirdparty/ruby/lib/ruby/2.0.0/i686-linux <yourfile.rb>

.

Btw. the #! line is called a shebang or hashbang, in case you want to research what happens.

score 1 · Accepted Answer · answered Oct 05 '15 at 09:22

Try this one:

#!/bin/bash
exec /data1/thirdparty/ruby/bin/ruby -I/data1/thirdparty/ruby/lib/ruby/2.0.0 -I/data1/thirdparty/ruby/lib/ruby/gems/2.0.0/gems/ruby-net-ldap-0.0.4 -I/data1/thirdparty/ruby/lib/ruby/site_ruby/2.0.0 -I/data1/thirdparty/ruby/lib/ruby/2.0.0/i686-linux -x "$0" "$@"

#!ruby
p "this is my ruby code"

Something is wrong with `#!`(shebang)(hashbang) in ruby script

2 Answers2