How to set Ruby's load path externally

Question

I have a custom Ruby library directory that I\'d like to have automatically added to Ruby\'s load path whenever Ruby is executed. I know I can use the -I optio

Answer 1

See the "Ruby and Its World" chapter from The Pickaxe Book, specifically the section on environment variables. Excerpt:

RUBYLIB 
  Additional search path for Ruby programs ($SAFE must be 0).
DLN_LIBRARY_PATH
  Search path for dynamically loaded modules.
RUBYLIB_PREFIX
  (Windows only) Mangle the RUBYLIB search path by adding this
  prefix to each component.