Initialize rbenv and run ruby script from shell script - ruby

Question

Initialize rbenv and run ruby script from shell script
I want svnserve to run pre-commit hook, written on ruby. As the svnserve is run as root user, it knows nothing about user rbenv installation.
I set a soft link /usr/bin/ruby -> /home/admin/.rbenv/shims/ruby .
As result, when i try
#!/usr/bin/ruby
puts "Pre-commit hook!"
It shows error:
Transmitting file data .svn: Commit failed (details follow):
svn: Commit blocked by pre-commit hook (exit code 255) with no output.
When i run manually on Server:
admin $ sudo ./pre-commit
/usr/bin/ruby: line 4: exec: rbenv: not found
So, i suppose, that rbenv initialization is needed, but how?

Answer 1

In hooks path:
pre-commit:
#!/bin/bash
export HOME=/home/user
if [ -d $HOME/.rbenv ]; then
export PATH="$HOME/.rbenv/shims:$PATH"
eval "$(rbenv init -)"
fi
$0.rb $*
pre-commit.rb:
#!/usr/bin/env ruby
ARGV.each_with_index { |arg, index| puts "Index #{index}: Argument #{arg}" }

Answer 2

you should initialize rbenv before using it.
/path/to/user/home/.rbenv/bin/rbenv init
then set ruby version globally:
rbenv global DESIRED-RUBY-VERSION
or localy:
rbenv local DESIRED-RUBY-VERSION
or per shell:
rbenv shell DESIRED-RUBY-VERSION
though not sure shell setting will work without a tty.
so you could create a shell script, pre-commit.sh and register it as a svn hook.
inside it initialize rbenv and call your pre-commit.rb file