README.md


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    Contents⊕
  
  
  About this Fork
  CLI
  
  Built-in help
  Diff
  Check
  Infer
  Validate
  
  Enforcer Rule
  
  Checking a project's
  compatibility
  Checking a project's
  version
  Dumping details
  Checking against
  a well known version
  Filtering
  
  API overview
  Maven dependency
  

Semantic Versioning is a Java library allowing to validate if library
version numbers follows Semantic Versioning principles as defined by [http://semver.org](Semantic
Versioning).
Project version number changes implication are not always clearly
identified. Will this patch released be safe to use in my project? Does
this minor version increment implies my implementation of some API is no
more complete?
Semantic Versioning can check JAR files to identify breaking changes
between versions and identify if your version number is correct
according to Semantic Versioning principles.
About this Fork
This fork contains the following changes:

Build with newer version of ASM to support Scala class files.
Better commandline interface based on CmdOption toolkit.

CLI
This simple command line tool looks at Java JAR files and determine
API changes.
Built-in help
% java -jar semver.jar --help
Semantic Version validator version 0.9.16-SNAPSHOT.

Usage: semver [options]

Options:
  --base-jar JAR          The base jar.
  --base-version VERSION  Version of the base jar (given with --base-jar).
  --check,-c              Check the compatibility of two jars.
  --diff,-d               Show the differences between two jars.
  --excludes EXCLUDE;...  Semicolon separated list of full qualified class names
                          to be excluded.
  --help,-h               Show this help and exit.
  --includes INCLUDE;...  Semicolon separated list of full qualified class names
                          to be included.
  --infer,-i              Infer the version of the new jar based on the previous
                          jar.
  --new-jar JAR           The new jar.
  --new-version VERSION   Version of the new jar (given with --new-jar).
  --validate,-v           Validate that the versions of two jars fulfil the
                          semver specification.
Diff
Dump all changes between two JARs on standard output.
% java -jar semver.jar --diff --base-jar previousJar --new-jar current.jar
Class org.project.MyClass
 Added Class 
Class org.project.MyClass2
 Added Method method1
 Removed Field field1
 Changed Field field2 removed: final
Check
Check compatibility type between two JARs.
% java -jar semver.jar --check --base-jar previousJar --new-jar current.jar
BACKWARD_COMPATIBLE_IMPLEMENTER
Infer
Infer JAR version based on a previously versioned JAR.
% java -jar semver.jar --infer --base-version 1.0.0 --base-jar previous.jar --new-jar current.jar
1.0.1
Validate
Validate JAR version based on a previously versioned JAR.
% java -jar semver.jar --validate --base-version 1.0.0 --base-jar previous.jar --new-version 1.0.1 --new-jar current.jar
true
Enforcer Rule
The enforcer rule offers a rule for checking project's version
against a previously released artifact.
Checking a project's
compatibility
In order to check your project's compatibility, you must add the
enforcer rule as a dependency to the maven-enforcer-plugin and then
configure the maven-enforcer-plugin to run the rule:
<project>
  ...
  <build>
    ...
    <plugins>
      ...
      <plugin>
        <artifactId>maven-enforcer-plugin</artifactId>
        <version>1.0.1</version>
        ...
        <dependencies>
            ...
            <dependency>
                <groupId>org.semver</groupId>
                <artifactId>enforcer-rule</artifactId>
                <version>0.9.15</version>
            </dependency>
            ...
        </dependencies>
        ...
        <executions>
           ....
          <execution>
            <id>check</id>
            <phase>verify</phase>
            <goals>
              <goal>enforce</goal>
            </goals>
            <configuration>
              <rules>
                <requireBackwardCompatibility implementation="org.semver.enforcer.RequireBackwardCompatibility">
                  <compatibilityType>BACKWARD_COMPATIBLE_IMPLEMENTER</compatibilityType>
                </requireBackwardCompatibility>
              </rules>
            </configuration>
          </execution>
          ...
        </executions>
        ...
      </plugin>
      ...
    </plugins>
    ...
  </build>
  ...
</project>
Once you have configured your project, maven-enforcer will be able to
throw a build error if current version is not backward compatible with
last released one.
You can force strict checking (i.e. compatibility type must exactly
match specified one):
<configuration>
  <rules>
    <requireBackwardCompatibility implementation="org.semver.enforcer.RequireBackwardCompatibility">
      ...
      <strictChecking>true</strictChecking>
      ...
    </requireBackwardCompatibility>
  </rules>
</configuration>
Checking a project's version
In order to check your project's version, you must add the enforcer
rule as a dependency to the maven-enforcer-plugin and then configure the
maven-enforcer-plugin to run the rule:
<project>
  ...
  <build>
    ...
    <plugins>
      ...
      <plugin>
        <artifactId>maven-enforcer-plugin</artifactId>
        <version>1.0.1</version>
        ...
        <dependencies>
            ...
            <dependency>
                <groupId>org.semver</groupId>
                <artifactId>enforcer-rule</artifactId>
                <version>0.9.12</version>
            </dependency>
            ...
        </dependencies>
        ...
        <executions>
           ....
          <execution>
            <id>check</id>
            <phase>verify</phase>
            <goals>
              <goal>enforce</goal>
            </goals>
            <configuration>
              <rules>
                <requireSemanticVersioningConformance implementation="org.semver.enforcer.RequireSemanticVersioningConformance" />
              </rules>
            </configuration>
          </execution>
          ...
        </executions>
        ...
      </plugin>
      ...
    </plugins>
    ...
  </build>
  ...
</project>
Once you have configured your project, maven-enforcer will be able to
throw a build error if current version follows semantic versioning
principles.
Dumping details
Dump details of detected changes:
<configuration>
  <rules>
    <require...>
      ...
      <dumpDetails>true</dumpDetails>
      ...
    </require...>
  </rules>
</configuration>
Checking against a well
known version
You can force check with a well known version:
<configuration>
  <rules>
    <require...>
      ...
      <previousVersion>1.0.0</previousVersion>
      ...
    </require...>
  </rules>
</configuration>
Filtering
Both rules allow to filter classes/packages:
<require...>
  ...
  <includes>
    <include>org.project.MyClass</include>
    <include>org.project.internal</include>
  </includes>
  <excludes>
    <exclude>org.project.MyClass</exclude>
    <exclude>org.project.internal</exclude>
  </excludes>
  ...
</require...>
API overview
Semantic Versioning also provides an API for programmatically
validating your project's version number.
final File previousJar = ...;
final File currentJar = ...;
        
final Comparer comparer = new Comparer(previousJar, currentJar, ..., ...);
final Delta delta = comparer.diff();

final String compatibilityType = ...;

//Validates that computed and provided compatibility type are compatible.
final Delta.CompatibilityType expectedCompatibilityType = Delta.CompatibilityType.valueOf(compatibilityType);
final Delta.CompatibilityType detectedCompatibilityType = delta.computeCompatibilityType();
if (detectedCompatibilityType.compareTo(expectedCompatibilityType) > 0) {
  //Not compatible.
}

//Provide version number for previous and current Jar files.
final Version previous = Version.parse(...);
final Version current = Version.parse(...);

//Validates that current version number is valid based on semantic versioning principles.
final boolean compatible = delta.validate(previous, current);
Maven dependency
<dependency>
    <groupId>org.semver</groupId>
    <artifactId>enforcer-rule</artifactId>
    <version>0.9.15</version>
</dependency>