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https://issues.apache.org/jira/browse/ARCHETYPE-492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16292219#comment-16292219
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Matthias Hanisch commented on ARCHETYPE-492:
--------------------------------------------
Just to let everybody else know my workaround:
In archetype-metadata I created a requiredProperty like this:
{noformat}
<requiredProperty key="underscoreArtifactId">
<defaultValue>_${artifactId}</defaultValue>
</requiredProperty>
{noformat}
The above filename can be now written as
errors___underscoreArtifactId___.properties.
This avoids the triple-underscore-problem
> Underscore in filenames problematic due to greedy regex
> -------------------------------------------------------
>
> Key: ARCHETYPE-492
> URL: https://issues.apache.org/jira/browse/ARCHETYPE-492
> Project: Maven Archetype
> Issue Type: Bug
> Components: Plugin
> Affects Versions: 2.4
> Environment: Windows 7, Sun JDK
> Reporter: Oliver Dungey
>
> If you have a file in a project with an underscore adjacent to a substitution
> variable, the substitution will fail i.e.
> if {{artifactId}} is 'Test' and a target file is to be named
> {{something_test.txt}} the file in the template should be named
> {{something____artifactId__.txt}} (3 underscores in the middle) but the
> result is an error stating that the property {{_artifactId}} cannot be found.
> This is because the term inside the regex is a greedy .* - a simple fix
> would be to change this to something like __[^_]*___ which would only match
> non-underscore characters.
> Fixing this issue would allow the use of underscores in filenames in all
> circumstances rather than the current situation where you may get lucky. The
> only down side to fixing this issue is that properties with leading or
> trailing underscores will not be valid - this seems a far more preferable
> situation.
> A patch for this issue was put on this bug back in 01//2009 but somehow got
> ignored - see [~maslovalex] patch and comments at the end of this issue:
> https://issues.apache.org/jira/browse/ARCHETYPE-191
> Apologies for the formatting - it appears double underscores are an issue :-)
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