Question

I am writing a template for Rails 3 (you can find it here), and I’m having troubles with the following lines:

# 8. config/database.yml modifications
if yes?("Do you want to set the database host to '/var/run/postgresql'?")
  inject_into_file "config/database.yml", " host: /var/run/postgresql\n", :after => "development:\n"


  # FIXME these two won't work :(((( why????
  # inject_into_file "config/database.yml", " host: /var/run/postgresql\n", :after => "production:\n"
  # inject_into_file "config/database.yml", " host: /var/run/postgresql\n", :after => "test:\n"


  # Not finding other solutions, I rewrite the two blocks above with two seds
  run %q(sed -i '/test:/a\ \ host: /var/run/postgresql' config/database.yml)
  run %q(sed -i '/production:/a\ \ host: /var/run/postgresql' config/database.yml)
end

That is, the first inject_to_file works, and in config/database.yml I have

development:
  host: /var/run/postgresql

but the other two inject_to_file are successfully applied, but don’t modify config/database.yml! So I have

test:
  adapter: postgresql

and

production:
  adapter: postgresql

Answer 1

You have to specify the :force => true option to inject the same text multiple times.
See:

http://rdoc.info/github/wycats/thor/master/Thor/Actions#insert_into_file-instance_method

This version works for me:

https://gist.github.com/2573325

Don’t ask me why that option makes any sense, tho.