sonar自定义规则

Sonar并不是简单地把不同的代码检查工具结果（例如 FindBugs，PMD 等）直接显示在 Web 页面上，而是通过不同的插件对这些结果进行再加工处理，通过量化的方式度量代码质量的变化，从而可以方便地对不同规模和种类的工程进行代码质量管理。

sonarqubue默认的对java的检测规则不一定适合我们，可以自己去自定义rules。

禁用rules

Rules-Quality Profile- Sonar way Java

查看激活的规则，可以禁用，或者更改严重级别(Severity)

自定义rules

sonar提供XPath或Java方式的扩展，有的语言支持XPath，有的只能支持Java，比如Java语言只支持Java方式的扩展。具体详见Support of Custom Rules by Language

步骤如下：

• 创建一个SonarQube插件

• 增加相关依赖

• 创建自定义rules

• 生成插件的jar包

• 将该jar包放在SONARQUBE_HOME/extensions/plugins目录下

• 重启SonarQube

添加maven依赖

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>

        <sonar-plugin-api.version>5.6</sonar-plugin-api.version>
        <sonar-java-plugin.version>4.2</sonar-java-plugin.version>
        <sonar-packaging-maven-plugin.version>1.17</sonar-packaging-maven-plugin.version>

        <sslr-testing-harness.version>1.20</sslr-testing-harness.version>
        <junit.version>4.12</junit.version>
        <fest-assert.version>1.4</fest-assert.version>
        <logback-classic.version>1.1.3</logback-classic.version>

    </properties>
    <dependencies>
        <dependency>
            <groupId>org.sonarsource.sonarqube</groupId>
            <artifactId>sonar-plugin-api</artifactId>
            <version>${sonar-plugin-api.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.sonarsource.java</groupId>
            <artifactId>sonar-java-plugin</artifactId>
            <version>${sonar-java-plugin.version}</version>
            <type>sonar-plugin</type>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.sonarsource.java</groupId>
            <artifactId>java-checks-testkit</artifactId>
            <version>${sonar-java-plugin.version}</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.codehaus.sonar.sslr</groupId>
            <artifactId>sslr-testing-harness</artifactId>
            <version>${sslr-testing-harness.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.easytesting</groupId>
            <artifactId>fest-assert</artifactId>
            <version>${fest-assert.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>${logback-classic.version}</version>
            <scope>test</scope>
        </dependency>

        <!--http://*.com/questions/35369058/custom-plugin-for-sonarqube-5-2-produces-noclassdeffounderror-->
        <!-- https://mvnrepository.com/artifact/org.codehaus.sonar.sslr-squid-bridge/sslr-squid-bridge -->
        <dependency>
            <groupId>org.codehaus.sonar.sslr-squid-bridge</groupId>
            <artifactId>sslr-squid-bridge</artifactId>
            <version>2.6</version>
            <!--记得exclude掉sonar-plugin-api,才可以加载其他相关依赖-->
            <exclusions>
                <exclusion>
                    <groupId>org.codehaus.sonar</groupId>
                    <artifactId>sonar-plugin-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.6.2</version>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>19.0</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.10</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>

    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.sonarsource.sonar-packaging-maven-plugin</groupId>
                <artifactId>sonar-packaging-maven-plugin</artifactId>
                <version>${sonar-packaging-maven-plugin.version}</version>
                <extensions>true</extensions>
                <configuration>
                    <pluginKey>java-custom</pluginKey>
                    <pluginName>Java Custom Rules</pluginName>
                    <!-- your plugin class -->
                    <pluginClass>com.xixicat.sonar.MySonarPlugin</pluginClass>
                    <sonarLintSupported>true</sonarLintSupported>
                    <sonarQubeMinVersion>5.6</sonarQubeMinVersion> <!-- allow to depend on API 6.x but run on LTS -->
                </configuration>
            </plugin>
        </plugins>
    </build>

这里的依赖要小心配置，记得exclude掉sonar-plugin-api,才可以加载其他相关依赖，然后显示依赖用到的jar，否则容易报class not found

编写plugin

创建plugin入口

public class MySonarPlugin implements Plugin {
    public void define(Context context) {
// server extensions -> objects are instantiated during server startup
        context.addExtension(MyJavaRulesDefinition.class);

        // batch extensions -> objects are instantiated during code analysis
        context.addExtension(MyJavaFileCheckRegistrar.class);
    }
}

这个类实现了org.sonar.api.Plugin接口，主要添加两类扩展：

• server extensions
  
  在sonarqube server启动时实例化，实现org.sonar.api.server.rule.RulesDefinition接口

public class MyJavaRulesDefinition implements RulesDefinition {

    public static final String REPOSITORY_KEY = "myRepo";

    public void define(Context context) {
        NewRepository repository = context.createRepository(REPOSITORY_KEY, Java.KEY);
        repository.setName("my sonar repo");
        AnnotationBasedRulesDefinition.load(repository, "java", RulesList.getChecks());
        repository.done();
    }
}

public class RulesList {

    private RulesList() {
    }

    public static List<Class> getChecks() {
        return ImmutableList.<Class>builder().addAll(getJavaChecks()).addAll(getJavaTestChecks()).build();
    }

    public static List<Class<? extends JavaCheck>> getJavaChecks() {
        return ImmutableList.<Class<? extends JavaCheck>>builder()
                .add(AvoidSmallerLengthVariableNameRule.class)
                .build();
    }

    public static List<Class<? extends JavaCheck>> getJavaTestChecks() {
        return ImmutableList.<Class<? extends JavaCheck>>builder()
                .build();
    }
}

• batch extensions
  
  在分析代码的时候实例化，实现org.sonar.plugins.java.api.CheckRegistrar接口

public class MyJavaFileCheckRegistrar implements CheckRegistrar {
    public void register(RegistrarContext registrarContext) {
        // Call to registerClassesForRepository to associate the classes with the correct repository key
        registrarContext.registerClassesForRepository(MyJavaRulesDefinition.REPOSITORY_KEY,
                Arrays.asList(checkClasses()), Arrays.asList(testCheckClasses()));
    }

    /**
     * Lists all the checks provided by the plugin
     */
    public static Class<? extends JavaCheck>[] checkClasses() {
        return new Class[] { // List of rules to be included here
                AvoidSmallerLengthVariableNameRule.class
        };
    }

    /**
     * Lists all the test checks provided by the plugin
     */
    public static Class<? extends JavaCheck>[] testCheckClasses() {
        return new Class[] {};
    }
}

创建规则

import org.sonar.api.server.rule.RulesDefinition;
import org.sonar.check.Priority;
import org.sonar.check.Rule;
import org.sonar.check.RuleProperty;
import org.sonar.plugins.java.api.JavaFileScanner;
import org.sonar.plugins.java.api.JavaFileScannerContext;
import org.sonar.plugins.java.api.tree.BaseTreeVisitor;
import org.sonar.plugins.java.api.tree.VariableTree;
import org.sonar.squidbridge.annotations.SqaleConstantRemediation;
import org.sonar.squidbridge.annotations.SqaleSubCharacteristic;

@Rule(key = "AvoidSmallerLengthLocalVariableName",
        name = "Avoid usage of the smaller length in local variable name",
        description = "This rule detects usage of smaller length local variable name. Variable name should not be smaller than 4 characters.",
        tags = {"coding-guideline"},
        priority = Priority.MINOR)
@SqaleSubCharacteristic(RulesDefinition.SubCharacteristics.ARCHITECTURE_CHANGEABILITY)
//SQALE全称是Software Quality Assessment based on Lifecycle Expectations，是一套评估代码质量的方法。
@SqaleConstantRemediation("10min") //纠正所需时间
public class AvoidSmallerLengthVariableNameRule extends BaseTreeVisitor implements JavaFileScanner {

    private static final String DEFAULT_VALUE = "SmallerLengthLocalVariable";

    private JavaFileScannerContext context;

    /**
     * Avoid usage of the smaller length in local variable name in Quality profiles.
     * The key
     */
    @RuleProperty(
            defaultValue = DEFAULT_VALUE,
            description = "Avoid usage of the smaller length in local variable name")
    protected String name;

    public void scanFile(JavaFileScannerContext context) {
        this.context = context;
        scan(context.getTree());
    }

    @Override
    public void visitVariable(VariableTree tree) {
        String variableName = tree.simpleName().name();
        System.out.println("Scanning the variable : " + variableName);
        if(variableName.length() < 4) {
            context.reportIssue(this,tree, "Variable length is less than 4 characters");
        }
        super.visitVariable(tree);
    }
}

打包plugin

mvn clean package sonar-packaging:sonar-plugin

拷贝到plugins

cp target/sonar-rule-demo-0.0.1-SNAPSHOT.jar ~/sonar/extensions/plugins

run

docker run --rm  \
 -e JAVA_OPTS='-Xmx1g' \
  -v /Users/xixicat/sonar/data:/opt/sonarqube/data \
  -v /Users/xixicat/sonar/extensions:/opt/sonarqube/extensions \
  -p 9000:9000 -p 9092:9092 \
  -e SONARQUBE_JDBC_USERNAME=sonar \
  -e SONARQUBE_JDBC_PASSWORD=sonar \
  sonarqube:lts-alpine

查看自定义的规则

doc

• Build Plugin

• Support of Custom Rules by Language

• Adding Coding Rules using Java

• java-custom-rules

• Custom-Java-Plugin-For-SONAR

• Analyzing with SonarQube Scanner

• How to create custom rules in Sonarqube for java and implement the same?