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https://issues.apache.org/jira/browse/MNG-7052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17280650#comment-17280650
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Maarten Mulders edited comment on MNG-7052 at 2/7/21, 8:25 PM:
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Although it was never documented, the plus character also allowed to *select* a
profile (see [this discussion on the merge
request|https://github.com/apache/maven/pull/429#discussion_r563383850]). So I
don't think we could allow the {{+}} character, as it might be confusing.
was (Author: mthmulders):
Although it was never documented, the {{+}} also allowed to *select* a profile
(see [this discussion on the merge
request|https://github.com/apache/maven/pull/429#discussion_r563383850]). So I
don't think we could allow the {{+}} character, as it might be confusing.
> Do not allow symbols as first character of identifiers in the POM
> -----------------------------------------------------------------
>
> Key: MNG-7052
> URL: https://issues.apache.org/jira/browse/MNG-7052
> Project: Maven
> Issue Type: Improvement
> Components: core
> Reporter: Martin Kanters
> Priority: Major
> Labels: up-for-grabs
> Fix For: 4.0.x-candidate
>
>
> In the {{DefaultModelValidator}} we currently validate identifiers against
> {{a-zA-Z0-9-_.}}
> Since Maven also allows operators to be used against an identifier, this can
> result in bugs or at least unexpected behavior for the user.
> The minus operator can be used to deactivate a certain profile, so an example
> would be:
> - A project having a profile with the id {{-id-of-profile}}
> - A Maven invocation of {{mvn <goal> -P-id-of-profile}}.
> The release of Maven 4 is a nice opportunity to restrict the first character
> of an id to be {{a-zA-Z0-9}} . The other characters may still consist of
> those symbols.
> This should apply to all identifiers that we support. The methods that need
> attention are:
> {{DefaultModelValidator#validateId}} and
> {{DefaultModelValidator#validateIdWithWildcards}}.
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