Problem when installing Ruby using RVM

Question

I am having a hard time trying to reinstall Ruby (1.9.2-p136) on my ubuntu machine, using RVM.

Basically I just do:

rvm install 1.9.2-p136

And during the Compiling step, it fails with the following error message:

(NoMethodError) undefined method `set_encoding' for RDoc::Parser:Class

I tried to look for this on Stackoverflow and Google but it didn't help!

Any idea?

Thanks!

EDIT: To be clear, I am not using Ubuntu but Linux Mint 9 which is based on Ubuntu 10.04.

Answer 1

Well, oddly enough, RDoc was rev'd last week to a new version. So, I suspect you're running into a snag with it, maybe Ruby 1.9.2-p136, and maybe RVM.

I'd recommend contacting the author of RVM; You can email him at the address that appears when you do rvm -v . Include the output of rvm info .

I'll do an install to a VM on my machine here and see how it goes. I have the same Ruby version, but it's been in place since it came out, so when RDoc updated there was an existing Ruby. I have the most recent Mint, which I assume is 9, based on Ubuntu 10 I think it said.

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EDIT:

I just built a Mint 10 VM, then installed rvm, then installed 1.8.7-p330 and 1.9.2-p136. Neither had any problems.

One thing I didn't do, that Wayne Seguin told me is important, is to rvm notes after installing it, before installing Ruby. That will display any OS-specific things needed. For instance, on Mint 10 it says:

dependencies:

For RVM

rvm: bash curl git

For Ruby (MRI & ree) you should install the following OS dependencies:

ruby: /usr/bin/aptitude install build-essential bison openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev

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EDIT:

An additional thing you might run into is a zlib warning when installing gems, which is handled on the RVM site in Zlib

Answer 2

I don't know what your problem is, but I've had to install rails to a couple of ubuntu machines and it was a nightmare compiling everything. I recently found:

http://thechangelog.com/post/2857400260/railsready-setup-script-to-get-ruby-and-rails-running

This is the only way I would install rails in ubuntu.