Benjamin Hawkes-Lewis created MCHECKSTYLE-228:
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Summary: 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
Reporter: Benjamin Hawkes-Lewis
Priority: Minor
Checkstyle SuppressionFilter allows you to specify a default suppressions file:
http://checkstyle.sourceforge.net/config.html#SuppressionFilter
Checkstyle Maven plugin allows you to depend on artefacts, such as a shared
artefact containing your Checkstyle configuration XML.
If you specify this configuration XML file in {{configLocation}}, it is found,
but the default suppressions XML file referenced in turn is not looked up using
the same classloader/classpath and subsequently is not found, resulting in
error 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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