Ifdef

Ifdef parses Ruby files, removing conditional branches that will never execute. You provide a set of statements that are known to be true or false (Eg. Rails.production? will be true in production), and Ifdef uses that to decide which branches will run and which to delete.

Ifdef analyses conditionals for if, unless and ternary statements. It can handle some logic in conditionals. For example, if Rails.production? is true, Ifdef will understand that !Rails.production? is false, and Rails.production? || some_other_statement is true. A statement is only considered to be true if it is known to be true. For example Rails.production? && some_other_statement will be true or false depending on the value of some_other_statement. Ifdef will not rewrite branches of this conditional.

Usage: ifdef [options] file
-a, --true=MANDATORY             A comma separated list of statements to treat as true
-b, --false=MANDATORY            A comma separated list of statements to treat as false
-c, --config=MANDATORY           The path to a JSON truth config file
-h, --help                       Show this message

ifdef -a "Rails.production?" -b "Rails.test?" ./app/controllers/application_controller.rb

• gem install ifdef