Apache Ant - Props Antlib

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# Props Antlib

This is a library of supplementary handlers for Ant properties resolution.

The types provided are instances of `org.apache.tools.ant.PropertyHelper.Delegate` and can be invoked using the `<propertyhelper>` task provided in Ant 1.8.0.

Delegate | Delegate Type | Description
--- | --- | ---
nested | PropertyExpander | Implements nested property expansion; e.g. `${${double-expand-me}}`.
stringops | PropertyEvaluator | Implements *nix shell-inspired string operations.
refs | PropertyEvaluator | Given `ref:refid`, resolves reference `refid`.
types | PropertyEvaluator | Given `type(arg)`, attempts to invoke `type` constructor `(project, arg)`, then `(arg)`.