[jira] Created: (IVY-609) Add a new trigger event to ivysettings what will be called immediately.

[John Gill (JIRA)]

Add a new trigger event to ivysettings what will be called immediately.
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                 Key: IVY-609
                 URL: https://issues.apache.org/jira/browse/IVY-609
             Project: Ivy
          Issue Type: New Feature
          Components: Core
    Affects Versions: 2.0.0-alpha-2
            Reporter: John Gill


h3. Use Case
In our legacy build system, we have an ant file which has a series of property 
set in it which specify the versions of the dependencies in it. Basically, 
something like this:

{code:xml|title=depends.xml}
<project>
    <property name="projectA" value="1.2.3"/>
    <property name="projectB" value="4.5.6"/>
</project>
{code}

Unfortunately, these properties cannot be used in the ivy settings, as the ivy 
settings only supports reading of properties files via the <properties/> 
element.

What is needed is a new type of ivy trigger which is called immediately (as 
soon as it is defined) which can be used to call an ANT target which in my case 
can be used to read in our depends.xml and  convert it to a properties file.

It is suggested that this new type of trigger event be called "*now*".

h3. Example

{code:xml|title=ivysettings.xml}
<ivysettings>
    <triggers>
        <ant-build antfile="${ivy.settings.dir}/build.xml" 
target="make-ivy-properties" event="now"/>
        <properties file="ivy.properties" override="true"/>
    </triggers>
</ivysettings>
{code}

{code:xml|title=build.xml}
<project name="projectX">
    <target name="make-ivy-properties">
        <copy file="depends.xml" tofile="ivy.properties">
            <filterchain>
                <replaceregex pattern='&ltproperty="(.*)" value="(.*)"' 
replace="\1=\2" flags="gi"/>
            </filterchain>
        </copy>
    <target>
</project>
{code}

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