Is there an easy way to test if the current directory is inside a rails project? Clearly Rails itself tests this in order to use the rails subcommands (generate, scaffold, etc.), so presumably there's a straight-forward way to test this.
I'm looking for something similar to how you would test if you're inside a Git repo.
I know you already have a solution in ruby, but here's one written in bash, which should be a bit faster.
Assuming you're using Bundler:
grep 'rails' 'Gemfile' >/dev/null 2>&1
if [ $? -eq 0 ]; then
echo "It's a Rails project!"
fi
This is what that snippet does:
grep 'rails' 'Gemfile' will return a status code of 2 if a file named 'Gemfile' doesn't exist in the current directory. grep will return a status code of 1 if the found a 'Gemfile' but it doesn't contain 'rails'.
For Rails 2 without Bundler this should work:
if [ -f script/rails ]; then
echo "It's a Rails 2 project!"
fi
All that does is test if the script/rails file exists.
I hope this helps someone who's hoping to do it bash instead of ruby.
There are no file or directory specific to Rails. so you can't really know if you are or not in a rails directory.
The better solution can be to know if you have rails or railities gem dependencies in your Gemfile.
bundle list | grep 'rail'
Upon further investigation, I was able to dig into the rails command itself and based a solution on part of the railties gem (<railties>/lib/rails/script_rails_loader.rb):
#!/usr/bin/env ruby
require 'pathname'
SCRIPT_RAILS = File.join('script', 'rails')
def self.in_rails_application?
File.exists?(SCRIPT_RAILS)
end
def self.in_rails_application_subdirectory?(path = Pathname.new(Dir.pwd))
File.exists?(File.join(path, SCRIPT_RAILS)) || !path.root? && in_rails_application_subdirectory?(path.parent)
end
if in_rails_application? || in_rails_application_subdirectory?
exit(0)
else
exit(1)
end