This cleanup aims to fix a build failure:
https://travis-ci.org/rails/rails/jobs/3515951/#L482
Since travis always have both ENV vars set to "test", a test is failing
where it's expected to output the default env "development", but "test"
is the result due to RACK_ENV being set when we expect it to not be.
By cleaning this duplication we ensure that changing any of these env
variables will pick the right expected value.
When using sqlite3 it was attempting to find the database file based on
Rails.root, the problem is that Rails.root is not always present because
we try to first manually load "config/database.yml" instead of loading
the entire app, to make "rails db" faster.
This means that when we're in the root path of the app, calling "rails db"
won't allow us to use Rails.root, making the command fail for sqlite3
with the error:
./rails/commands/dbconsole.rb:62:in `start':
undefined method `root' for Rails:Module (NoMethodError)
The fix is to simply not pass any dir string to File.expand_path, which
will make it use the current directory of the process as base, or the
root path of the app, which is what we want.
When we are in any other subdirectory, calling "rails db" should work
just fine, because "config/database.yml" won't be found, thus "rails db"
will fallback to loading the app, making Rails.root available.
Closes#8257.
Rails uses sqlit3 db file with a path relative to the rails root. It
allows to execute server not from rails root only. For example you
can fire `./spec/dummy/script/rails s` to start dummy application
server if you develop some engine gem.
Now the `rails db` command uses relative paths also and you can explore
your dummy db via `./spec/dummy/script/rails db` command.
rails server takes `-e` as an argument to specify RAILS_ENV, rails console currently does not have the same interface. This commit fixes this disparity so developers can manually specify `RAILS_ENV` or can pass in an environment with a `-e`.
When launching rails server from the command line with a rails environment specified such as `rails server RAILS_ENV=production` an error would occur since rails will try to use `RAILS_ENV=production` as it's server.
When launching rails with a specified server such as thin `rails server thin RAILS_ENV=production` no error will be thrown, but rails will not start up in the specified environment.
This fixes both of those cases
