#linecache

[lunacodes]

Python: the linecache module is so wonderful!!  linecache.getline() - so helpful!!

[devcartel-blog]

Fixing the linecache 0.45 issue under Ruby 1.8.7

June 11th there was an update to the linecache gem the starts pitching an error about require_relative. Adding require_relative or something similar to below fixes the issue. I attempted to lock the linecache gem down to the 0.43 but was getting different errors in my project. 

if RUBY_VERSION < "1.9"     gem 'require_relative'     gem "ruby-debug"   else     gem "ruby-debug19" end

[1bag-blog]

linecache nonsense

I have taken an old ubuntu machine out of hibernation and am trying to clone a github project of mine onto it to continue development but am running into some problems i have cloned my project down from github no problem i go into the folder and just to check i try to see what version of rails is there:

toast@buntubox:~/ruby/rails_projects/onebag$ rails -v Could not find linecache19-0.5.11 in any of the sources

Try running `bundle install`. so i take its advice and try running bundle install

... Installing linecache19 (0.5.11) with native extensions /usr/local/lib/site_ruby/1.8/rubygems/installer.rb:533:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError) ;/usr/bin/ruby1.8 extconf.rb  *** 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. OK... i guess i should have checked the ruby version first as well: toast@buntubox:~$ ruby -v ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]

ok so its off to RVM to try to install Ruby 1.9.2 - why RVM? I'm not sure, but the internet pretty much agrees that RVM should be used so who am i to argue.

$ rvm install ruby-1.9.2

and then bundle install, which unfortunatly crashed with the following:

Using ruby_core_source (0.1.4) Installing linecache19 (0.5.11) with native extensions /home/toast/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/installer.rb:533:in `rescue in block in build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError) /home/toast/.rvm/rubies/ruby-1.9.2-p180/bin/ruby extconf.rb *** 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. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/home/toast/.rvm/rubies/ruby-1.9.2-p180/bin/ruby /home/toast/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': no such file to load -- openssl (LoadError)

we can see at the bottom what the problem is  - not loading openssl, this should have been installed with ruby but for some reason not, so we have to:

$ rvm remove 1.9.2 $ rvm package install openssl $ rvm install 1.9.2 --with-openssl-dir=$HOME/.rvm/usr

and this finally seemed to do the trick - on to my rake db:migrate issues. More info on RVM and openssl here  http://rvm.beginrescueend.com/packages/openssl/