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https://jira.codehaus.org/browse/MCHECKSTYLE-228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dennis Lundberg updated MCHECKSTYLE-228:
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Affects Version/s: 2.12.1
> Default suppressions file lookup from a Checkstyle configuration in a shared
> artefact fails
> -------------------------------------------------------------------------------------------
>
> Key: MCHECKSTYLE-228
> URL: https://jira.codehaus.org/browse/MCHECKSTYLE-228
> Project: Maven Checkstyle Plugin
> Issue Type: Bug
> Affects Versions: 2.12.1
> Reporter: Benjamin Hawkes-Lewis
> Priority: Minor
> Attachments: bug.zip
>
>
> Checkstyle allows the definition of a list of files and their line ranges
> that should be suppressed using
> [SuppressionFilter|http://checkstyle.sourceforge.net/config.html#SuppressionFilter].
> SuppressionFilter allows you to specify a default suppressions file, for
> example:
> {code}
> <module name="SuppressionFilter">
> <property name="file" value="${some.property}"
> default="my-default-suppressions.xml" />
> </module>
> {code}
> Checkstyle Maven plugin allows you to pass through a file to set
> {{some.property}}:
> http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/suppressions-filter.html
> Checkstyle Maven plugin also allows you to depend on artefacts, such as a
> shared artefact containing Checkstyle check classes or a Checkstyle
> configuration XML file:
> http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/custom-developed-checkstyle.html
> If you reference this configuration XML file in {{configLocation}}, it will
> be successfully found.
> But if you do not explicitly set the suppressions file property, expecting it
> to fall back to a default suppressions file in the same shared artefact, the
> plugin fails to set the classpath/classloader such that Checkstyle's
> {{SuppressionsLoader}} can load the suppressions file, resulting in errors
> like:
> {code}
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-checkstyle-plugin:2.12.1:check (default-cli)
> on project checked-module: Failed during checkstyle configuration: cannot
> initialize module SuppressionFilter - Cannot set property 'file' in module
> SuppressionFilter to 'suppressions.xml': unable to find suppressions.xml:
> InvocationTargetException -> [Help 1]
> {code}
> See also discussion of this issue over in the Checkstyle project:
> https://github.com/checkstyle/checkstyle/issues/62
> I've attempted to create a minimal test case that demonstrates the problem
> over at:
> https://github.com/benjaminhawkeslewis/maven-checkstyle-plugin-default-suppressions-lookup-bug
> Backstory: The reason why I want to put a suppressions file inside my shared
> checkstyle configuration artefact is to allow projects using my shared
> configuration to (optionally) include a suppressions XML file specifying
> exemptions. I couldn't find a way to make this optional, without providing a
> default (blank) suppressions file.
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