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From Nicolas Lalevée (JIRA) <j...@apache.org>
Subject [jira] [Resolved] (IVY-1367) Support Conditional Setting of a Property
Date Mon, 13 Aug 2012 21:04:38 GMT

     [ https://issues.apache.org/jira/browse/IVY-1367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nicolas Lalevée resolved IVY-1367.
----------------------------------

       Resolution: Fixed
    Fix Version/s: trunk
         Assignee: Nicolas Lalevée
    
> Support Conditional Setting of a Property
> -----------------------------------------
>
>                 Key: IVY-1367
>                 URL: https://issues.apache.org/jira/browse/IVY-1367
>             Project: Ivy
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: 2.2.0
>            Reporter: J.C. Hamlin
>            Assignee: Nicolas Lalevée
>            Priority: Minor
>             Fix For: trunk
>
>
> Please allow a way to make conditional use of environment variables in ivysettings.xml.
If the environment variable is set, then set the property, otherwise, don't set the property.
This can be generalized into a general test to set a property only if another property is
set.
> Something like this, where the "ifset" is the new attribute of the property element.
>   <properties environment="env"/>
>   <property name="ivy.repos.server" value="${env.IVY_SERVER}" override="false" ifset="env.IVY_SERVER"
/>
>   <property name="ivy.repos.server" value="http://ivy:8081" override="false"/>
> In ant, you do something like this, which is very similar (but more verbose):
>   <condition property="ivy.repos.server" value="${env.IVY_SERVER}">
>     <isset property="env.IVY_SERVER"/>
>   </condition>
>   <property name="ivy.repos.server" value="http://ivy:8081"/>
> So, if a user defines an environment variable it will override the default value provided
by the system. And if the environment variable is not defined in the environment, then the
system default value can apply.

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