Just forwarding this response back to the users list, so everyone has
a chance to read.
-john
Begin forwarded message:
From: John Casey <[EMAIL PROTECTED]>
Date: May 24, 2007 9:55:28 AM EDT
To: "Maven Developers List" <[EMAIL PROTECTED]>
Subject: Re: Settings Variable expansion
System properties are basically the only thing available at the
time that the settings.xml is read. Since profile definitions are
read from the settings, it causes a sort of chicken-and-egg
scenario to try variable expansion with variables defined in profiles.
Also, if we took a second round of processing, this time including
properties from profiles, we could in turn activate more profiles
(or deactivate some that had already donated new variables)...which
seems like an ambiguous, recursive mess.
Also note that plugin configuration goes through a second round of
variable expansion, using values from the current build state in
addition to those used during initial POM and settings
interpolation. Anything that isn't resolved through direct variable
expansion in the settings or POM then has another chance at
resolution here...just FWIW. That will not include Repository
instances and so forth, which have already been constructed with
their various value expressions...only direct plugin configuration.
Oh, and you also have the option of performing additional variable
expansion steps inside your own plugin, using that
RegexBasedInterpolator if you like...
HTH,
-john
On May 24, 2007, at 12:56 AM, Timothy Reilly wrote:
I am reposting this question to dev list based on a (very) vague
understanding of how it working now:
I see the settings runs through
org.codehaus.plexus.util.interpolation.RegexBasedInterpolator so I
think
the answer to my question is that only system properties are
available
for variable expansion in the settings files? And properties from an
activated profile would not be?
Also, without really obsorbing the code yet... Would a second
round of
processing be a valid enhancement request?
(In the second round I assume there is a different ValueSource which
would take properties defined by an activated profile?)
-----Original Message-----
From: Timothy Reilly
Sent: Tuesday, May 22, 2007 5:21 PM
To: users@maven.apache.org
Subject: Settings Variable expansion
Based on this information
http://maven.apache.org/settings.html
<http://maven.apache.org/settings.html>
<http://maven.apache.org/settings.html
<http://maven.apache.org/settings.html> > I thought that
variables and variable expansion would be available anywhere
in a POM _and_ settings files?
Is this not the case - is it only pom xml that does expansion?
<quot>
They come in five different styles, _all accessible from the
settings.xml_ </quot> Currently my settings.xml has:
<settings xmlns=http://maven.apache.org/POM/4.0.0
xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/settings-1.0.0.xsd
<http://maven.apache.org/xsd/settings-1.0.0.xsd> "> <profiles>
<!-- desktop profile -->
<profile>
<id>windows</id>
<activation>
<activeByDefault>false</activeByDefault>
<os>
<family>windows</family>
</os>
</activation>
<properties>
<environment>UNIT</environment>
</properties>
</profile>
<profile>
<id>test-resolution</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<repositories>
<repository>
<id>my-unit</id>
<layout>default</layout>
<name>my-unit</name>
<releases>
<enabled>true</enabled>
<checksumPolicy>warn</checksumPolicy>
<updatePolicy>daily</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
<url>
http://myurl:18080/my/${environment}/release
<http://myurl:18080/my/${environment}/release>
</url>
</repository>
</repositories>
</profile>
</profiles>
</settings>
But help:effective-settings shows the ${environment} isn't
expanding.
<repository>
<releases>
<updatePolicy>daily</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
<id>my-unit</id>
<name>my-unit</name>
<url>http://myurl:18080/my/${environment}/release</url>
</repository>
Am I doing something incorrectly?
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---
John Casey
Committer and PMC Member, Apache Maven
mail: jdcasey at commonjava dot org
blog: http://www.ejlife.net/blogs/john
---
John Casey
Committer and PMC Member, Apache Maven
mail: jdcasey at commonjava dot org
blog: http://www.ejlife.net/blogs/john
