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https://jira.codehaus.org/browse/MPH-87?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=298434#comment-298434
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Herve Boutemy commented on MPH-87:
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yes, that's expected
if you want to use the result, you need to use output parameter to let the
plugin write the content directly to a file, with encoding support
{noformat}mvn -Doutput=effective.xml help:effective-pom{noformat}
> help:effective-pom uses platform encoding and garbles non-ascii characters,
> emits invalid XML
> ---------------------------------------------------------------------------------------------
>
> Key: MPH-87
> URL: https://jira.codehaus.org/browse/MPH-87
> Project: Maven 2.x Help Plugin
> Issue Type: Bug
> Affects Versions: 2.1.1
> Environment: Windows, MacOSX, Linux, Maven 3.0.4
> Reporter: Mirko Friedenhagen
> Attachments: mfriedenhagen-invalidpom-MPH-87-0-g42a5c31.zip
>
>
> As stated in http://www.w3.org/TR/REC-xml/#sec-guessing-no-ext-info XML files
> without a BOM and without a XML encoding declaration should read the XML as
> UTF-8.
> {{help:effective-pom}} does use the platform encoding for writing the
> effective-pom without emitting an appropriate XML encoding declaration in the
> resulting XML file.
> I have created a small sample project (available at
> https://github.com/mfriedenhagen/invalidpom, attached as ZIP) which will
> reproduce the issue.
> While the parent pom
> (https://raw.github.com/mfriedenhagen/invalidpom/master/pom.xml) has a XML
> encoding declaration,
> https://raw.github.com/mfriedenhagen/invalidpom/master/child-invalid/pom.xml
> has none.
> Now running:
> {code}
> mvn -s settings.xml -gs settings.xml clean validate
> {code}
> will produce an invalid character for the developer name "Jörg" in
> {{child-invalid}}.
> Two workarounds are:
> * to include a XML encoding declaration as done in {{child-valid}}.
> * to use {{JAVA_TOOL_OPTIONS}} on Windows as stated in
> http://stackoverflow.com/a/623036/49132
> * to use {{MAVEN_OPTS=-Dfile.encoding=utf-8 mvn -s settings.xml -gs
> settings.xml clean validate}}.
> Nonetheless I consider this a Major bug, as it clearly violates the
> recommendations of W3C.
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