Mikhail Polivakha created MNG-7833:
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Summary: Re-evaluate properties before execution
Key: MNG-7833
URL: https://issues.apache.org/jira/browse/MNG-7833
Project: Maven
Issue Type: New Feature
Affects Versions: 4.0.0-alpha-7
Reporter: Mikhail Polivakha
This Jira ticket is inspired by GitHub issue:
[https://github.com/mojohaus/properties-maven-plugin/issues/39]
The problem: there are some plugins online, like `properties-maven-plugin` for
instance, that load maven properties from different locations. And developers
often want to use such plugins like this:
# Load some varaibles from file
# Dynamically apply this varaibles as a plugin configuration parameter
The problem is that the DOM of pm.xml seems to be parsed before any plugin took
place which is perfectly reasonable to assume. But I think we should improve on
that: Can we re-evaluate tags values when it is actaully used?
What do I mean - let's say we declare `properties-maven-plugin` that laod
proeprties at `validate` stage. After that we have an `assembly-maven-plugin`
at `package` stage, which assembles the tar archive. The name of the archive is
detemrmined in the `<configuration>` by `tar.archive.name` variable. But
currently it does not matter if this variable was loaded by
`proeprties-maven-plugin` - we evaluated pom.xml DOM before any build. The
point of this Jira ticket is to change that and, if `tar.archive.name` was
declared in the file loaded by `properties-maven-plugin` to be re-evaluated
when `assembly-maven-plugin` actually gets executed
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