Ssh to execute remote ruby script

ruby-talk
1

I'm using 'net/ssh' to ssh into a OS X server and run a ruby script,
like this:

  Net::SSH.start( "xxx.xxx.xxx", :username => 'xxx', :password => 'xxx'
) do | session |
    shell = session.shell.open
    shell.exec "ruby /usr/local/pgsql/share/migrate.rb
#{params['host']}"
  end

The migrate.rb looks like this:

  require 'rubygems'
  ...some ruby code

For some reason, the script fails to execute anything after the require
'rubygems' line. If I remove that line, the script will run, but
obviously I cannot use any gems, which I need.

If I ssh via terminal to the server, I can run the script fine with:
ruby /usr/local/pgsql/share/migrate.rb 1

I can't figure out why, when ssh'ing via the net/ssh package, the remote
script cannot include rubygems.

Any ideas?

···

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Posted via http://www.ruby-forum.com/.

2

the remote machine has two rubys, one which has rubygems installed and one without - when you ssh into a machine you may or may not have your environment configured correctly and, thus, may or may not have your 'normal' PATH set. try your command with the full path to the ruby you are expecting to use. note that any

   system 'something'

may also fail if the PATH setting is indeed the cause.

this is a wild ass guess.

a @ http://codeforpeople.com/

···

On May 15, 2008, at 9:53 AM, Blake Miller wrote:

I can't figure out why, when ssh'ing via the net/ssh package, the remote
script cannot include rubygems.

--
we can deny everything, except that we have the possibility of being better. simply reflect on that.
h.h. the 14th dalai lama

3

Maybe some environment variables is not set properly when logged in as
non-interactive session? It seems interactive shell and non-interactive
ones do not run the same bunch of start up scripts. like ~/.profile,
~/.bashrc , etc.

···

On Thu, May 15, 2008 at 11:53 PM, Blake Miller <blakeage@hotmail.com> wrote:

I'm using 'net/ssh' to ssh into a OS X server and run a ruby script,
like this:

Net::SSH.start( "xxx.xxx.xxx", :username => 'xxx', :password => 'xxx'
) do | session |
   shell = session.shell.open
   shell.exec "ruby /usr/local/pgsql/share/migrate.rb
#{params['host']}"
end

The migrate.rb looks like this:

require 'rubygems'
...some ruby code

For some reason, the script fails to execute anything after the require
'rubygems' line. If I remove that line, the script will run, but
obviously I cannot use any gems, which I need.

If I ssh via terminal to the server, I can run the script fine with:
ruby /usr/local/pgsql/share/migrate.rb 1

I can't figure out why, when ssh'ing via the net/ssh package, the remote
script cannot include rubygems.

Any ideas?
--
Posted via http://www.ruby-forum.com/\.

--
pluskid

4

ara.t.howard wrote:

try your command with the full path to the ruby you are expecting to use.

That worked...the new code uses the ruby in /usr/local/bin/ruby:

shell.exec "/usr/local/bin/ruby /usr/local/pgsql/share/migrate.rb
#{params['host']}"

···

--
Posted via http://www.ruby-forum.com/\.