Synopsis

A wrapper that allows the use of the Scalafmt formatter in Maven.

Usage

Add the following snippet to your pom, and it will be invoked as part of your build during the selected lifecycle phase (default validate).

Note: version.scala.binary refers to major releases of scala ie. 2.11, 2.12 or 2.13.
mvn_scalafmt_2.11 will soon be deprecated and may not receive future releases

You can also invoke the plugin directly via mvn scalafmt:format.

Versioning

This plugin follows the following versioning convention:

mvn_scalafmt_(scalaversion)-(major).(minor).(commitepoch).(commithash)

The latest release should be visible at the top of this readme.

Minimal Working POM XML:

    <plugin>
        <groupId>org.antipathy</groupId>
        <!-- The scala binary here doesn't need to match the project version -->
        <artifactId>mvn-scalafmt_${version.scala.binary}</artifactId>
        <!-- This represents the desired version of the plugin, whould be in the form:
             (major).(minor).(commitepoch).(commithash), which can be found here:
             https://github.com/simonjpegg/mvn_scalafmt/releases
             e.g. <version>1.0.1589620826.41b214a</version>
             Note: The SCALA version is OMITTED from this value
        -->
        <version>__DESIRED_MVN_SCALAFMT_VERSION__</version>
        <configuration>
            <configLocation>${project.basedir}/.scalafmt.conf</configLocation> <!-- path to config -->
        </configuration>
        <executions>
            <execution>
                <phase>validate</phase>
                <goals>
                    <goal>format</goal>
                </goals>
            </execution>
        </executions>
    </plugin>

FULL SNIPPET

<plugin>
    <groupId>org.antipathy</groupId>
    <!-- The scala binary here doesn't need to match the project version -->
    <artifactId>mvn-scalafmt_${version.scala.binary}</artifactId>
    <!-- This represents the desired version of the plugin, whould be in the form:
         (major).(minor).(commitepoch).(commithash), which can be found here:
         https://github.com/simonjpegg/mvn_scalafmt/releases
         e.g. <version>1.0.1589620826.41b214a</version>
         Note: The SCALA version is OMITTED from this value
    -->
    <version>__DESIRED_MVN_SCALAFMT_VERSION__</version>
    <configuration>
        <configLocation>${project.basedir}/.scalafmt.conf</configLocation> <!-- path to config -->
        <skipTestSources>false</skipTestSources> <!-- (Optional) skip formatting test sources -->
        <skipSources>false</skipSources> <!-- (Optional) skip formatting main sources -->
        <sourceDirectories> <!-- (Optional) Paths to source-directories. Overrides ${project.build.sourceDirectory} -->
          <param>${project.basedir}/src/main/scala</param>
        </sourceDirectories>
        <testSourceDirectories> <!-- (Optional) Paths to test-source-directories. Overrides ${project.build.testSourceDirectory} -->
          <param>${project.basedir}/src/test/scala</param>
        </testSourceDirectories>
        <validateOnly>false</validateOnly> <!-- check formatting without changing files -->
        <onlyChangedFiles>true</onlyChangedFiles> <!-- only format (staged) files that have been changed from the specified git branch -->
        <showReformattedOnly>false</showReformattedOnly> <!-- log only modified files -->
        <!-- The git branch to check against
             If branch.startsWith(": ") the value in <branch> tag is used as a command to run
             and the output will be used as the actual branch-->
        <branch>: git rev-parse --abbrev-ref HEAD</branch> <!-- the current branch-->
        <!-- <branch>master</branch>-->
        <useSpecifiedRepositories>false</useSpecifiedRepositories> <!-- use project repositories configuration for scalafmt dynamic loading -->
    </configuration>
    <executions>
        <execution>
            <phase>validate</phase> <!-- default -->
            <goals>
                <goal>format</goal>
            </goals>
        </execution>
    </executions>
</plugin>

configLocation Can either be a local path (e.g. ${project.basedir}/.scalafmt.conf) or a HTTP url (e.g https://raw.githubusercontent.com/jozic/scalafmt-config/master/.scalafmt.conf)

make sure you have set a version in your scalafmt.conf

version = "2.6.2"