When executing an Ant build.xml file, the Ant executable should not be required
to live on the environment's $PATH
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Key: JRUBY-6250
URL: https://jira.codehaus.org/browse/JRUBY-6250
Project: JRuby
Issue Type: Bug
Components: Java Integration
Affects Versions: JRuby 1.6.5
Environment: RHEL6
Reporter: John Ryding
Priority: Minor
When trying to re-use a pre-built build.xml file, the following code is used:
def exec_ant(arg_list)
ant arg_list
end
When executed in this way, JRuby's Ant library makes a shell call to execute
Ant. This is done at lib/ruby/site_ruby/shared/ant/ant.rb:172.
The problem is that the path to the ant executable (e.g. /opt/apache-ant/bin)
is required to live on the environment's $PATH. This is a problem for systems
that get automatically deployed by configuration management systems like Chef
because is is difficult for a script to permanently set the $PATH variable to
live on after its process is done. Also, external systems like build engines
may screw up the $PATH. For example, the build system that my team uses sets
its own $PATH when it executes a new build, which requires us to have our
scripts explicitly know where the Ant binary lives in order to utilize
Jruby+Ant.
A better method to execute ant from an sh command would be to use some other
environment variable the same way Java is required to ($JAVA_HOME).
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