>=0.16.0: Cannot compare versions because the number of old versions is different than the number of new versions

[lalithaawgu]

I am configuring a multimodule maven project to use the maven plugin. But I see this error when i specify 4 jars in to compare against 4 jars in If i skip entirely build succeeds but doesnt report missing classes. This seems to be an issue only with v0.16.0 onwards, doesnt happen in v0.15.7.

Is it possible to compare oldVersion artifact(does NOT pull the classpath dependencies ) against the newVersion classpath dependencies(is pulled in automatically which is good)

Caused by: japicmp.exception.JApiCmpException: Cannot compare versions because the number of old versions is different than the number of new versions.

com.github.siom79.japicmp japicmp-maven-plugin 0.16.0

[siom79]

Can you post the configuration of the maven plugin? Looks like you are using the option breakBuildBasedOnSemanticVersioningForMajorVersionZero?

[lalithaawgu]

Successful with 0.15.7.

<configuration>
  <newVersions>
    <dependency>
      <groupId>${project.groupId}</groupId>
      <artifactId>${project.artifactId}</artifactId>
      <version>${project.version}</version>
      <type>jar</type>
    </dependency>
    <dependency>
      <groupId>group1</groupId>
      <artifactId>artifact1</artifactId>
      <version>2.3.7</version>
    </dependency>
    <dependency>
      <groupId>group2</groupId>
      <artifactId>artifact2</artifactId>
      <version>0.2.7</version>
    </dependency>
    <dependency>
      <groupId>group3</groupId>
      <artifactId>artifact3</artifactId>
      <version>0.2.7</version>
    </dependency>
  </newVersions>
  <oldVersions>
    <dependency>
      <groupId>${project.groupId}</groupId>
      <artifactId>${project.artifactId}</artifactId>
      <version>2.4.8.RELEASE</version>
      <type>jar</type>
    </dependency>
    <dependency>
      <groupId>group1</groupId>
      <artifactId>artifact1</artifactId>
      <version>2.3.3</version>
    </dependency>
    <dependency>
      <groupId>group2</groupId>
      <artifactId>artifact2</artifactId>
      <version>0.2.6</version>
    </dependency>
    <dependency>
      <groupId>group3</groupId>
      <artifactId>artifact3</artifactId>
      <version>0.2.6
      </version>
    </dependency>
  </oldVersions>
  <parameter>
    <onlyBinaryIncompatible>true</onlyBinaryIncompatible>
    <breakBuildOnBinaryIncompatibleModifications>true</breakBuildOnBinaryIncompatibleModifications>
    <breakBuildBasedOnSemanticVersioning>true</breakBuildBasedOnSemanticVersioning>
    <skipXmlReport>true</skipXmlReport>
    <skipPomModules>true</skipPomModules>
    <ignoreMissingOptionalDependency>false</ignoreMissingOptionalDependency>
    <ignoreNonResolvableArtifacts>false</ignoreNonResolvableArtifacts>
    <ignoreMissingClassesByRegularExpressions>
      <ignoreMissingClassesByRegularExpression>^((?!host1\.host2).)*$</ignoreMissingClassesByRegularExpression>
    </ignoreMissingClassesByRegularExpressions>
    <overrideCompatibilityChangeParameters>
      <overrideCompatibilityChangeParameter>
        <compatibilityChange>CONSTRUCTOR_REMOVED</compatibilityChange>
        <binaryCompatible>true</binaryCompatible>
        <sourceCompatible>false</sourceCompatible>
        <semanticVersionLevel>MINOR</semanticVersionLevel>
      </overrideCompatibilityChangeParameter>
    </overrideCompatibilityChangeParameters>
  </parameter>
</configuration>

Thanks!

[martinaldrin]

We have same issue, we can not uplift to 0.16.0 or any newer version. we are stuck on 0.15.7. We have a multi module project with 40 modules and we only include the modules that have been modified during the test with the -pl option.

mvn com.github.siom79.japicmp:japicmp-maven-plugin:cmp -Pnbc -pl <moduleName> -Doldversion=<old version> This is our profile

 <profile>
            <id>nbc</id>
            <build>
                <plugins>
                    <plugin>
                        <groupId>com.github.siom79.japicmp</groupId>
                        <artifactId>japicmp-maven-plugin</artifactId>
                        <version>${japicmp.maven.plugin.version}</version>
                        <configuration>
                            <oldVersion>
                                <dependency>
                                    <groupId>${project.groupId}</groupId>
                                    <artifactId>${project.artifactId}</artifactId>
                                    <version>${oldversion}</version>
                                    <type>jar</type>
                                </dependency>
                            </oldVersion>
                            <parameter>
                                <onlyModified>true</onlyModified>
                                <includes>
                                    <include>com......</include>
                                    <include>com.....</include>
                                    <include>com......</include>
                                </includes>
                                <excludes>
                                    <exclude>com......</exclude>
                                    <exclude>com.....</exclude>
                                </excludes>
                                <accessModifier>public</accessModifier>
                                <breakBuildOnModifications>false</breakBuildOnModifications>
                                <breakBuildOnBinaryIncompatibleModifications>true</breakBuildOnBinaryIncompatibleModifications>
                                <breakBuildOnSourceIncompatibleModifications>true</breakBuildOnSourceIncompatibleModifications>
                                <onlyBinaryIncompatible>false</onlyBinaryIncompatible>
                                <includeSynthetic>false</includeSynthetic>
                                <ignoreMissingClasses>false</ignoreMissingClasses>
                                <skipPomModules>true</skipPomModules>
                                <overrideCompatibilityChangeParameters>
                                    <overrideCompatibilityChangeParameter>
                                        <compatibilityChange>METHOD_ADDED_TO_INTERFACE</compatibilityChange>
                                        <binaryCompatible>true</binaryCompatible>
                                        <sourceCompatible>true</sourceCompatible>
                                    </overrideCompatibilityChangeParameter>
                                    <overrideCompatibilityChangeParameter>
                                        <compatibilityChange>METHOD_ADDED_TO_PUBLIC_CLASS</compatibilityChange>
                                        <binaryCompatible>true</binaryCompatible>
                                        <sourceCompatible>true</sourceCompatible>
                                    </overrideCompatibilityChangeParameter>
                                    <overrideCompatibilityChangeParameter>
                                        <compatibilityChange>METHOD_ABSTRACT_ADDED_TO_CLASS</compatibilityChange>
                                        <binaryCompatible>true</binaryCompatible>
                                        <sourceCompatible>true</sourceCompatible>
                                    </overrideCompatibilityChangeParameter>
                                </overrideCompatibilityChangeParameters>
                            </parameter>
                        </configuration>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>cmp</goal>
                                </goals>
                                <phase>verify</phase>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
        </profile>

[siom79]

Have you tried a new version like 0.18.5? In these versions the code throwing the Cannot compare versions because the number of old versions is different than the number of new versions. does no longer exist.