问题
what is the best way to make JRuby to run in 1.9 mode by default?
i.e, I want to run rake test instead of jruby --1.9 -S rake test
Thank you
回答1:
Use the JRUBY_OPTS environment variable. JRUBY_OPTS holds a list of arguments that are added to any arguments specified on the command line.
For example (on Linux):
$ jruby -v jruby 1.6.0.RC1 (ruby 1.8.7 patchlevel 330) (2011-01-10 769f847) (Java HotSp... $ export JRUBY_OPTS=--1.9 $ jruby -v jruby 1.6.0.RC1 (ruby 1.9.2 trunk 136) (2011-01-10 769f847) (Java HotSpot(TM... $ export JRUBY_OPTS=--1.8 $ jruby -v jruby 1.6.0.RC1 (ruby 1.8.7 patchlevel 330) (2011-01-10 769f847) (Java HotSpo...
回答2:
An alternative solution is to put the following line (and other settings) in your ~/.jrubyrc file
compat.version=1.9
回答3:
RVM allows now building JRuby/Rubinius with default mode set by default:
rvm install jruby-1.6.7-d19 --1.9
rvm install rbx-2.0.testing-d19 --1.9
The suffix -d19 can be omitted, I use it only to distinguish between 1.8 and 1.9 mode rubies.
The --1.9 mode will become the default in next major releases of JRuby/Rubinius, so you can make sure you will use 1.8 with --1.8 rvm switch.
UPDATE 2012-05-25: Jruby 1.7.0.preview1 is out, it is 1.9 by default!
回答4:
In Windows, use
set JRUBY_OPTS=--1.9 instead.
回答5:
When using warbler to package an app as a war file, the version can be set by running:
warble config
which creates a config/warble.rb file. This file contains lots of comments on how to configure warbler, and in particular:
# Set JRuby to run in 1.9 mode.
# config.webxml.jruby.compat.version = "1.9"
Uncomment the second line by removing the #, and re-package your war with the warble command.
回答6:
If you're creating jruby from java:
RubyInstanceConfig config = new RubyInstanceConfig();
config.setCompatVersion(CompatVersion.Ruby1_9);
Ruby runtime = Ruby.newInstance(config)
(Thanks to bbrowning on the #jrubyc irc channel)
来源：https://stackoverflow.com/questions/4755900/how-to-make-jruby-1-6-default-to-ruby-1-9