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checkstyle:check

Full name:

org.apache.maven.plugins:maven-checkstyle-plugin:3.3.0:check

Description:

Performs Checkstyle analysis and outputs violations or a count of violations to the console, potentially failing the build. It can also be configured to re-use an earlier analysis.

Attributes:

  • Requires a Maven project to be executed.
  • The goal is thread-safe and supports parallel builds.
  • Binds by default to the lifecycle phase: verify.

Required Parameters

Name Type Since Description
<includeResources> boolean 2.11 Whether to apply Checkstyle to resource directories.
Default value is: true.
User property is: checkstyle.includeResources.
<includes> String - Specifies the names filter of the source files to be used for Checkstyle.
Default value is: **\/*.java.
User property is: checkstyle.includes.
<includeTestResources> boolean 2.11 Whether to apply Checkstyle to test resource directories.
Default value is: true.
User property is: checkstyle.includeTestResources.
<resourceIncludes> String 2.11 Specifies the names filter of the files to be used for Checkstyle when checking resources.
Default value is: **/*.properties.
User property is: checkstyle.resourceIncludes.

Optional Parameters

Name Type Since Description
<cacheFile> String - Specifies the cache file used to speed up Checkstyle on successive runs.
Default value is: ${project.build.directory}/checkstyle-cachefile.
<checkstyleRules> PlexusConfiguration 2.12 By using this property, you can specify the whole Checkstyle rules inline directly inside this pom. 
<plugin>
  ...
  <configuration>
    <checkstyleRules>
      <module name="Checker">
        <module name="FileTabCharacter">
          <property name="eachLine" value="true" />
        </module>
        <module name="TreeWalker">
          <module name="EmptyBlock"/>
        </module>
      </module>
    </checkstyleRules>
  </configuration>
  ...

<checkstyleRulesHeader> String - The header to use for the inline configuration. Only used when you specify checkstyleRules.
Default value is: <?xml version="1.0"?> <!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd"> .
<configLocation> String 2.5

Specifies the location of the XML configuration to use.

Potential values are a filesystem path, a URL, or a classpath resource. This parameter expects that the contents of the location conform to the xml format (Checkstyle Checker module) configuration of rulesets.

This parameter is resolved as resource, URL, then file. If successfully resolved, the contents of the configuration is copied into the ${project.build.directory}/checkstyle-configuration.xml file before being passed to Checkstyle as a configuration.

There are 2 predefined rulesets.

  • sun_checks.xml: Sun Checks.
  • google_checks.xml: Google Checks.

Default value is: sun_checks.xml.
User property is: checkstyle.config.location.
<consoleOutput> boolean - Output errors to console.
Default value is: false.
User property is: checkstyle.consoleOutput.
<excludes> String - Specifies the names filter of the source files to be excluded for Checkstyle.
User property is: checkstyle.excludes.
<failOnViolation> boolean - Fail the build on a violation. The goal checks for the violations after logging them (if logViolationsToConsole is true). Compare this to failsOnError which fails the build immediately before examining the output log.
Default value is: true.
User property is: checkstyle.failOnViolation.
<failsOnError> boolean - If this is true, and Checkstyle reported any violations or errors, the build fails immediately after running Checkstyle, before checking the log for logViolationsToConsole. If you want to use logViolationsToConsole, use failOnViolation instead of this.
Default value is: false.
<headerLocation> String 2.0-beta-2

Specifies the location of the License file (a.k.a. the header file) that can be used by Checkstyle to verify that source code has the correct license header.

You need to use ${checkstyle.header.file} in your Checkstyle xml configuration to reference the name of this header file.

For instance:

<module name="RegexpHeader">
  <property name="headerFile" value="${checkstyle.header.file}"/>
</module>

Default value is: LICENSE.txt.
User property is: checkstyle.header.file.
<includeTestSourceDirectory> boolean 2.2 Include or not the test source directory to be used for Checkstyle.
Default value is: false.
<inputEncoding> String 2.2 The file encoding to use when reading the source files. If the property project.build.sourceEncoding is not set, the platform default encoding is used. Note: This parameter always overrides the property charset from Checkstyle's TreeWalker module.
Default value is: ${project.build.sourceEncoding}.
User property is: encoding.
<logViolationCountToConsole> boolean 3.0.1 Output the detected violation count to the console.
Default value is: true.
User property is: checkstyle.logViolationCount.
<logViolationsToConsole> boolean 2.3 Output the detected violations to the console.
Default value is: true.
User property is: checkstyle.console.
<maxAllowedViolations> int 2.3 The maximum number of allowed violations. The execution fails only if the number of violations is above this limit.
Default value is: 0.
User property is: checkstyle.maxAllowedViolations.
<omitIgnoredModules> boolean 3.0.0 Specifies whether modules with a configured severity of ignore should be omitted during Checkstyle invocation.
Default value is: false.
<outputFile> File - Specifies the path and filename to save the Checkstyle output. The format of the output file is determined by the outputFileFormat parameter.
Default value is: ${project.build.directory}/checkstyle-result.xml.
User property is: checkstyle.output.file.
<outputFileFormat> String - Specifies the format of the output to be used when writing to the output file. Valid values are "plain" and "xml".
Default value is: xml.
User property is: checkstyle.output.format.
<propertiesLocation> String 2.5

Specifies the location of the properties file.

This parameter is resolved as URL, File then resource. If successfully resolved, the contents of the properties location is copied into the ${project.build.directory}/checkstyle-checker.properties file before being passed to Checkstyle for loading.

The contents of the propertiesLocation will be made available to Checkstyle for specifying values for parameters within the xml configuration (specified in the configLocation parameter).


User property is: checkstyle.properties.location.
<propertyExpansion> String - Allows for specifying raw property expansion information.
<resourceExcludes> String 2.11 Specifies the names filter of the files to be excluded for Checkstyle when checking resources.
User property is: checkstyle.resourceExcludes.
<rulesFiles> File - Dump file for inlined Checkstyle rules.
Default value is: ${project.build.directory}/checkstyle-rules.xml.
User property is: checkstyle.output.rules.file.
<skip> boolean 2.2 Skip entire check.
Default value is: false.
User property is: checkstyle.skip.
<skipExec> boolean 2.5 Skip Checkstyle execution will only scan the outputFile.
Default value is: false.
User property is: checkstyle.skipExec.
<sourceDirectories> List<String> 2.13 Specifies the location of the source directories to be used for Checkstyle. Default value is ${project.compileSourceRoots}.
<sourceDirectory> File - Deprecated. Specifies the location of the source directory to be used for Checkstyle.
<suppressionsFileExpression> String 2.1 The key to be used in the properties for the suppressions file.
Default value is: checkstyle.suppressions.file.
User property is: checkstyle.suppression.expression.
<suppressionsLocation> String 2.0-beta-2

Specifies the location of the suppressions XML file to use.

This parameter is resolved as resource, URL, then file. If successfully resolved, the contents of the suppressions XML is copied into the ${project.build.directory}/checkstyle-suppressions.xml file before being passed to Checkstyle for loading.

See suppressionsFileExpression for the property that will be made available to your Checkstyle configuration.


User property is: checkstyle.suppressions.location.
<testSourceDirectories> List<String> 2.13 Specifies the location of the test source directories to be used for Checkstyle. Default value is ${project.testCompileSourceRoots}.
<testSourceDirectory> File 2.2 Deprecated. Specifies the location of the test source directory to be used for Checkstyle.
<useFile> File - If null, the Checkstyle plugin will display violations on stdout. Otherwise, a text file will be created with the violations.
<violationIgnore> String 2.13 Violations to ignore. This is a comma-separated list, each value being either a rule name, a rule category or a java package name of rule class.
User property is: checkstyle.violation.ignore.
<violationSeverity> String 2.2 The lowest severity level that is considered a violation. Valid values are "error", "warning" and "info".
Default value is: error.
User property is: checkstyle.violationSeverity.

Parameter Details

<cacheFile>

Specifies the cache file used to speed up Checkstyle on successive runs.
  • Type: java.lang.String
  • Required: No
  • Default: ${project.build.directory}/checkstyle-cachefile

<checkstyleRules>

By using this property, you can specify the whole Checkstyle rules inline directly inside this pom. 
<plugin>
  ...
  <configuration>
    <checkstyleRules>
      <module name="Checker">
        <module name="FileTabCharacter">
          <property name="eachLine" value="true" />
        </module>
        <module name="TreeWalker">
          <module name="EmptyBlock"/>
        </module>
      </module>
    </checkstyleRules>
  </configuration>
  ...
  • Type: org.codehaus.plexus.configuration.PlexusConfiguration
  • Since: 2.12
  • Required: No

<checkstyleRulesHeader>

The header to use for the inline configuration. Only used when you specify checkstyleRules.
  • Type: java.lang.String
  • Required: No
  • Default: <?xml version="1.0"?> <!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd">

<configLocation>

Specifies the location of the XML configuration to use.

Potential values are a filesystem path, a URL, or a classpath resource. This parameter expects that the contents of the location conform to the xml format (Checkstyle Checker module) configuration of rulesets.

This parameter is resolved as resource, URL, then file. If successfully resolved, the contents of the configuration is copied into the ${project.build.directory}/checkstyle-configuration.xml file before being passed to Checkstyle as a configuration.

There are 2 predefined rulesets.

  • sun_checks.xml: Sun Checks.
  • google_checks.xml: Google Checks.
  • Type: java.lang.String
  • Since: 2.5
  • Required: No
  • User Property: checkstyle.config.location
  • Default: sun_checks.xml

<consoleOutput>

Output errors to console.
  • Type: boolean
  • Required: No
  • User Property: checkstyle.consoleOutput
  • Default: false

<excludes>

Specifies the names filter of the source files to be excluded for Checkstyle.
  • Type: java.lang.String
  • Required: No
  • User Property: checkstyle.excludes

<failOnViolation>

Fail the build on a violation. The goal checks for the violations after logging them (if logViolationsToConsole is true). Compare this to failsOnError which fails the build immediately before examining the output log.
  • Type: boolean
  • Required: No
  • User Property: checkstyle.failOnViolation
  • Default: true

<failsOnError>

If this is true, and Checkstyle reported any violations or errors, the build fails immediately after running Checkstyle, before checking the log for logViolationsToConsole. If you want to use logViolationsToConsole, use failOnViolation instead of this.
  • Type: boolean
  • Required: No
  • Default: false

<headerLocation>

Specifies the location of the License file (a.k.a. the header file) that can be used by Checkstyle to verify that source code has the correct license header.

You need to use ${checkstyle.header.file} in your Checkstyle xml configuration to reference the name of this header file.

For instance:

<module name="RegexpHeader">
  <property name="headerFile" value="${checkstyle.header.file}"/>
</module>
  • Type: java.lang.String
  • Since: 2.0-beta-2
  • Required: No
  • User Property: checkstyle.header.file
  • Default: LICENSE.txt

<includeResources>

Whether to apply Checkstyle to resource directories.
  • Type: boolean
  • Since: 2.11
  • Required: Yes
  • User Property: checkstyle.includeResources
  • Default: true

<includes>

Specifies the names filter of the source files to be used for Checkstyle.
  • Type: java.lang.String
  • Required: Yes
  • User Property: checkstyle.includes
  • Default: **\/*.java

<includeTestResources>

Whether to apply Checkstyle to test resource directories.
  • Type: boolean
  • Since: 2.11
  • Required: Yes
  • User Property: checkstyle.includeTestResources
  • Default: true

<includeTestSourceDirectory>

Include or not the test source directory to be used for Checkstyle.
  • Type: boolean
  • Since: 2.2
  • Required: No
  • Default: false

<inputEncoding>

The file encoding to use when reading the source files. If the property project.build.sourceEncoding is not set, the platform default encoding is used. Note: This parameter always overrides the property charset from Checkstyle's TreeWalker module.
  • Type: java.lang.String
  • Since: 2.2
  • Required: No
  • User Property: encoding
  • Default: ${project.build.sourceEncoding}

<logViolationCountToConsole>

Output the detected violation count to the console.
  • Type: boolean
  • Since: 3.0.1
  • Required: No
  • User Property: checkstyle.logViolationCount
  • Default: true

<logViolationsToConsole>

Output the detected violations to the console.
  • Type: boolean
  • Since: 2.3
  • Required: No
  • User Property: checkstyle.console
  • Default: true

<maxAllowedViolations>

The maximum number of allowed violations. The execution fails only if the number of violations is above this limit.
  • Type: int
  • Since: 2.3
  • Required: No
  • User Property: checkstyle.maxAllowedViolations
  • Default: 0

<omitIgnoredModules>

Specifies whether modules with a configured severity of ignore should be omitted during Checkstyle invocation.
  • Type: boolean
  • Since: 3.0.0
  • Required: No
  • Default: false

<outputFile>

Specifies the path and filename to save the Checkstyle output. The format of the output file is determined by the outputFileFormat parameter.
  • Type: java.io.File
  • Required: No
  • User Property: checkstyle.output.file
  • Default: ${project.build.directory}/checkstyle-result.xml

<outputFileFormat>

Specifies the format of the output to be used when writing to the output file. Valid values are "plain" and "xml".
  • Type: java.lang.String
  • Required: No
  • User Property: checkstyle.output.format
  • Default: xml

<propertiesLocation>

Specifies the location of the properties file.

This parameter is resolved as URL, File then resource. If successfully resolved, the contents of the properties location is copied into the ${project.build.directory}/checkstyle-checker.properties file before being passed to Checkstyle for loading.

The contents of the propertiesLocation will be made available to Checkstyle for specifying values for parameters within the xml configuration (specified in the configLocation parameter).

  • Type: java.lang.String
  • Since: 2.5
  • Required: No
  • User Property: checkstyle.properties.location

<propertyExpansion>

Allows for specifying raw property expansion information.
  • Type: java.lang.String
  • Required: No

<resourceExcludes>

Specifies the names filter of the files to be excluded for Checkstyle when checking resources.
  • Type: java.lang.String
  • Since: 2.11
  • Required: No
  • User Property: checkstyle.resourceExcludes

<resourceIncludes>

Specifies the names filter of the files to be used for Checkstyle when checking resources.
  • Type: java.lang.String
  • Since: 2.11
  • Required: Yes
  • User Property: checkstyle.resourceIncludes
  • Default: **/*.properties

<rulesFiles>

Dump file for inlined Checkstyle rules.
  • Type: java.io.File
  • Required: No
  • User Property: checkstyle.output.rules.file
  • Default: ${project.build.directory}/checkstyle-rules.xml

<skip>

Skip entire check.
  • Type: boolean
  • Since: 2.2
  • Required: No
  • User Property: checkstyle.skip
  • Default: false

<skipExec>

Skip Checkstyle execution will only scan the outputFile.
  • Type: boolean
  • Since: 2.5
  • Required: No
  • User Property: checkstyle.skipExec
  • Default: false

<sourceDirectories>

Specifies the location of the source directories to be used for Checkstyle. Default value is ${project.compileSourceRoots}.
  • Type: java.util.List<java.lang.String>
  • Since: 2.13
  • Required: No

<sourceDirectory>

Deprecated. instead use sourceDirectories. For version 3.0.0, this parameter is only defined to break the build if you use it!
Specifies the location of the source directory to be used for Checkstyle.
  • Type: java.io.File
  • Required: No

<suppressionsFileExpression>

The key to be used in the properties for the suppressions file.
  • Type: java.lang.String
  • Since: 2.1
  • Required: No
  • User Property: checkstyle.suppression.expression
  • Default: checkstyle.suppressions.file

<suppressionsLocation>

Specifies the location of the suppressions XML file to use.

This parameter is resolved as resource, URL, then file. If successfully resolved, the contents of the suppressions XML is copied into the ${project.build.directory}/checkstyle-suppressions.xml file before being passed to Checkstyle for loading.

See suppressionsFileExpression for the property that will be made available to your Checkstyle configuration.

  • Type: java.lang.String
  • Since: 2.0-beta-2
  • Required: No
  • User Property: checkstyle.suppressions.location

<testSourceDirectories>

Specifies the location of the test source directories to be used for Checkstyle. Default value is ${project.testCompileSourceRoots}.
  • Type: java.util.List<java.lang.String>
  • Since: 2.13
  • Required: No

<testSourceDirectory>

Deprecated. instead use testSourceDirectories. For version 3.0.0, this parameter is only defined to break the build if you use it!
Specifies the location of the test source directory to be used for Checkstyle.
  • Type: java.io.File
  • Since: 2.2
  • Required: No

<useFile>

If null, the Checkstyle plugin will display violations on stdout. Otherwise, a text file will be created with the violations.
  • Type: java.io.File
  • Required: No

<violationIgnore>

Violations to ignore. This is a comma-separated list, each value being either a rule name, a rule category or a java package name of rule class.
  • Type: java.lang.String
  • Since: 2.13
  • Required: No
  • User Property: checkstyle.violation.ignore

<violationSeverity>

The lowest severity level that is considered a violation. Valid values are "error", "warning" and "info".
  • Type: java.lang.String
  • Since: 2.2
  • Required: No
  • User Property: checkstyle.violationSeverity
  • Default: error