Questions[rails](ubuntu)

I don't know if this question belongs here, but I'll take a shot. Hi. I'm running ubuntu 11.10 dual-boot with windows vista on my machine. On Ubuntu, I've installed RVM, rails gem, & PostgreSQL (the postgres server, client, & other packages like libpq5, because I installed it via Software Center).

I'm trying to deploy my app on heroku, but seems like i need to install pg gem. I tried to install it, but got this error instead:

ERROR: Failed to build gem native extension.

/home/pcr/.rvm/rubies/ruby-1.9.3-p0/bin/ruby extconf.rb checking for pg_config... yes

Using config values from /usr/bin/pg_config

You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application. You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.

checking for libpq-fe.h... * extconf.rb failed *

After searching google & stackoverflow for a while, many people said that libpq-dev has to be installed. I tried, via software center but fail do to unmet dependencies. I tried via apt-get, it said that I need libkrb5-dev and krb5-multidev. I tried sudo apt-get install libpq-dev libkrb5-dev krb5-multidev, and got this:

The following packages have unmet dependencies: krb5-multidev :

Depends: libkrb5-3 (= 1.9.1+dfsg-1ubuntu1) but 1.9.1+dfsg-1ubuntu2.1 is to be installed

Depends: libk5crypto3 (= 1.9.1+dfsg-1ubuntu1) but 1.9.1+dfsg-1ubuntu2.1 is to be installed

Depends: libgssapi-krb5-2 (= 1.9.1+dfsg-1ubuntu1) but 1.9.1+dfsg-1ubuntu2.1 is to be installed E: Unable to correct problems, you have held broken packages.

But I already have libkrb5-3, libk5crypto3, and libgssapi-krb5-2 (all with version 1.9.1+dfsg-1ubuntu2.1) on my system! I think maybe the version needed is 1.9.1+dfsg-1ubuntu1. So, maybe I have to remove the 1.9.1+dfsg-1ubuntu2.1 packages first. Do you think it's safe for me to remove it? I tried to remove one of them, but software center warns me that it will also remove postgres, openssl-client, smbclient, cups, and many other packages.

What should I do to resolve this? And, is pg gem really necessary to be installed on my local machine to create rails app with postgres as the dbms? Is there a way to "hand over" the responsibility to include pg gem to heroku instead?

I have to install Sphinx on my Ubuntu 11.10 for it to work on a ruby app.

I managed to install it through synaptics, however when I run my sphinx (rake ts:rebuild) I get an error message saying:

Sphinx cannot be found on your system. You may need to configure the following
settings in your config/sphinx.yml file:
* bin_path
* searchd_binary_name
* indexer_binary_name

I guess I just need to edit the sphinx.yml file with the right info but hey, I can't seem to find out where sphinx is. Any help?

When I try to use tab completion with rake, only files are suggested:

$ rails test-app | grep -v create; cd test-app
$ rake <TAB><TAB>
app/      db/       lib/      public/   README    test/     vendor/   
config/   doc/      log/      Rakefile  script/   tmp/    

The package rake-0.8.7-2 includes a Bash completion configuration file,

$ debsums -e rake
/etc/bash_completion.d/rake                                         OK

so I expect that pressing tab should suggest the tasks available to rake:

$ rake --tasks
(in ~/sandbox/test-app)
rake db:abort_if_pending_migrations       # Raises an error if there are pending migrations
rake db:charset                           # Retrieves the charset for the current environment's database
rake db:collation                         # Retrieves the collation for the current environment's database
rake db:create                            # Create the database defined in config/database.yml for the current RAIL...
rake db:create:all                        # Create all the local databases defined in config/database.yml
rake db:drop                              # Drops the database for the current RAILS_ENV
...

What am I doing wrong?

The problem persists after reinstalling rake and restarting my computer. My ~/.bashrc contains:

if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
    . /etc/bash_completion
fi

but completion for rake doesn't appear to be registered:

$ complete | grep rake
$

Explicitly running . /etc/bash_completion in the shell doesn't solve the problem, but running the following command does enable completion for rake temporarily:

$ grep complete /etc/bash_completion.d/rake
[ -n "${have:-}" ] && complete -F _rake $filenames rake
$ complete -F _rake rake
$ rake <TAB><TAB>
db:abort_if_pending_migrations       db:version                           rails:update
db:charset                           doc:app                              rails:update:application_controller
db:collation                         doc:clobber_app                      rails:update:configs
db:create                            doc:clobber_plugins                  rails:update:generate_dispatchers
db:create:all                        doc:clobber_rails                    rails:update:javascripts
db:drop                              doc:guides                           rails:update:scripts
...

I am trying to get my ruby on rails up and running but i can't seem to install sqlite3-ruby gem . When i run it i get this error :

Fetching: sqlite-ruby-2.2.3.gem (100%) Building native extensions. This could take a while... ERROR: Error installing sqlite-ruby: ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb checking for main() in -lsqlite... no checking for sqlite.h... no * extconf.rb failed * Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.

any solutions ?

I am interested in setting up a Ruby on Rails environment on my 10.10 laptop.

Is there anything special I need to keep in mind for installation (i.e. that could be new or unique to 10.10)?

Are there any suggested walkthroughs that I could follow along with?

Thanks in advance.