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https://issues.apache.org/jira/browse/MNG-3558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17939602#comment-17939602
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Guillaume Nodet commented on MNG-3558:
--------------------------------------
This is actually doable in Maven 4.
For model properties, the syntax is the following
{code:xml}
<properties>
<tmp-prop>$\{my-prop\}</tmp-prop>
</properties>
{code}
For the antrun plugin configuration, one needs to escape for ant in addition to
escape for Maven, so:
{code:xml}
<echo>How to print my property placeholder #5 (working):
$$\{my-prop\}</echo>
{code}
Starting from Maven 4.0.0-beta-5, the output is the following:
{code}
[WARNING] [echo] How to print my property placeholder #5 (working):
${my-prop}
{code}
> Add a property substitution escaping mechanism
> ----------------------------------------------
>
> Key: MNG-3558
> URL: https://issues.apache.org/jira/browse/MNG-3558
> Project: Maven
> Issue Type: New Feature
> Components: General
> Affects Versions: 2.0.9, 3.1.1
> Reporter: Christophe DENEUX
> Priority: Minor
> Fix For: 4.0.0
>
>
> Hi,
> Developping a maven plugin, it is possible to initialize plugin parameters to
> "$\{artifactId}-$\{version}" without property substitution, using:
> {{@parameter expression="$$\{artifactId}-$$\{version}.$$\{extension}"}}
> at the parameter declaration.
> But, in a POM file, it seems to me that it is not possible to redefine the
> value of a such parameter without property substitution.
> I had tried without success:
> * <parameter>$\{dollar}\{artifactId}</parameter> with the property "dollar"
> set to "$", replaced by value of artifactId,
> * <parameter>$$\{artifactId}</parameter>, replaced by "$" followed by
> artifactId value,
> * <parameter>\$\{artifactId}</parameter>, replaced by "\" followed by
> artifactId value,
> * <parameter><!\[CDATA\[$\{artifactId}]]></parameter>, replaced by value of
> artifactId.
> Please, add a property substitution escaping mechanism.
> Thanks,
> Christophe
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