feat(bumpVersion): add prerelease semver level (#15626)

docs/usage/configuration-options.md

@@ -320,7 +320,7 @@ Currently this setting supports `helmv3`, `npm`, `maven` and `sbt` only, so rais
 Its purpose is if you want Renovate to update the `version` field within your package file any time it updates dependencies within.
 Usually this is for automatic release purposes, so that you don't need to add another step after Renovate before you can release a new version.
 
-Configure this value to `"patch"`, `"minor"` or `"major"` to have Renovate update the version in your edited package file.
+Configure this value to `"prerelease"`, `"patch"`, `"minor"` or `"major"` to have Renovate update the version in your edited package file.
 e.g. if you wish Renovate to always increase the target `package.json` version with a patch update, configure this to `"patch"`.
 
 For `npm` only you can also configure this field to `"mirror:x"` where `x` is the name of a package in the `package.json`.

lib/config/options/index.ts

@@ -1250,7 +1250,7 @@ const options: RenovateOptions[] = [
     name: 'bumpVersion',
     description: 'Bump the version in the package file being updated.',
     type: 'string',
-    allowedValues: ['major', 'minor', 'patch'],
+    allowedValues: ['major', 'minor', 'patch', 'prerelease'],
     supportedManagers: ['helmv3', 'npm', 'maven', 'sbt'],
   },
   // Major/Minor/Patch

lib/modules/manager/maven/__fixtures__/prerelease.pom.xml

@@ -0,0 +1,6 @@
+<project>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.mycompany.app</groupId>
+  <artifactId>my-app</artifactId>
+  <version>1.0.0-1</version>
+</project>

lib/modules/manager/maven/update.spec.ts

@@ -5,6 +5,7 @@ import * as pomUpdater from '.';
 
 const simpleContent = Fixtures.get(`simple.pom.xml`);
 const minimumContent = Fixtures.get(`minimum.pom.xml`);
+const prereleaseContent = Fixtures.get(`prerelease.pom.xml`);
 
 describe('modules/manager/maven/update', () => {
   describe('bumpPackageVersion', () => {
@@ -63,5 +64,16 @@ describe('modules/manager/maven/update', () => {
       );
       expect(bumpedContent).toEqual(simpleContent);
     });
+
+    it('bumps pom.xml version with prerelease semver level', () => {
+      const { bumpedContent } = pomUpdater.bumpPackageVersion(
+        prereleaseContent,
+        '1.0.0-1',
+        'prerelease'
+      );
+
+      const project = new XmlDocument(bumpedContent!);
+      expect(project.valueWithPath('version')).toBe('1.0.0-2');
+    });
   });
 });