# Version Management

This document is about versioning Sermant.

Sermant directly use versions-maven-plugin (opens new window) do version management , commonly used commands are as follows:

The updated version number is ${version}：
```
mvn versions:set -DnewVersion=${version}
```
By default, this command keeps the original pom file backup.
Rollback version number:
```
mvn versions:revert
```
Commit the new version update, i.e. delete the original pom file backup:
```
mvn versions:commit
```
Update version to ${version} and commit:
```
mvn versions:set -DnewVersion=${version} -DgenerateBackupPoms=false
```
This command will not back up the original pom file, be careful not to write the version number wrong when using it.

In the above update command, only the modules that have the same version as the top-level module in the project will be modified. If you need to update a module separately, you can use the -pl flag, for example:

mvn versions:set -DnewVersion=${version} -DgenerateBackupPoms=false -pl ${module}

Where ${module} can pass ${groupId}:${artifactId}, can also pass relative path. In the case of multiple modules, use the ',' sign.

More information about the versions:set command can be found here Versions Maven Plugin versions:set (opens new window)。

More versions-maven-plugin commands can be found in Versions Maven Plugin Introduction (opens new window)。