Per module versions

pom.xml

@@ -63,7 +63,7 @@
             <dependency>
                 <groupId>${project.groupId}</groupId>
                 <artifactId>git-commit-id-plugin-core</artifactId>
-                <version>6.0.0</version>
+                <version>6.0.1-SNAPSHOT</version>
             </dependency>
             <dependency>
                 <groupId>com.google.code.findbugs</groupId>

src/main/java/pl/project13/maven/git/GitCommitIdMojo.java

@@ -284,6 +284,14 @@ public class GitCommitIdMojo extends AbstractMojo {
   @Parameter(defaultValue = "${project.basedir}/.git")
   File dotGitDirectory;
 
+  /**
+   * Configuration to tell the git-commit-id-maven-plugin to consider only
+   * commits affecting the folder containing this module, rather than all
+   * commits in the repository.
+   */
+  @Parameter(defaultValue = "false")
+  boolean enablePerModuleVersions;
+
   /**
    * Configuration for the {@code 'git-describe'} command. You can modify the dirty marker, abbrev
    * length and other options here. The following `gitDescribe` configuration below is optional and
@@ -1325,6 +1333,11 @@ public boolean getUseBranchNameFromBuildEnvironment() {
               return useBranchNameFromBuildEnvironment;
             }
 
+            @Override
+            public boolean getPerModuleVersions() {
+              return enablePerModuleVersions;
+            }
+
             @Override
             public boolean isOffline() {
               return offline || settings.isOffline();
@@ -1404,6 +1417,11 @@ public boolean shouldPropertiesEscapeUnicode() {
             public boolean shouldFailOnNoGitDirectory() {
               return failOnNoGitDirectory;
             }
+
+            @Override
+            public File getModuleBaseDir() {
+              return new File(project.getBasedir().getAbsolutePath());
+            }
           };
 
       GitCommitIdPlugin.runPlugin(cb, properties);

src/test/java/pl/project13/maven/git/GitCommitIdMojoIntegrationTest.java

@@ -39,6 +39,7 @@
 import org.codehaus.plexus.util.FileUtils;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.ResetCommand;
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
@@ -1716,6 +1717,48 @@ public void shouldGeneratePropertiesWithMultiplePrefixesAndReactorProject(boolea
     }
   }
 
+  @Test
+  public void shouldGiveCommitIdForEachFolderWhenPerModuleVersionsEnabled()
+      throws Exception {
+    // given
+    mavenSandbox
+        .withParentProject("parent-project", "pom")
+        .withChildProject("src/test", "jar")
+        .withGitRepoInParent(AvailableGitTestRepo.GIT_COMMIT_ID)
+        .withKeepSandboxWhenFinishedTest(true)
+        .create();
+
+    // Only supported with JGit
+    mojo.useNativeGit = false;
+
+    // Don't skip the parent project
+    mojo.skipPoms = false;
+
+    //Enable per module versions
+    mojo.enablePerModuleVersions = true;
+
+    MavenProject parentProject = mavenSandbox.getParentProject(); // "my-pom-project"
+    MavenProject childProject = mavenSandbox.getChildProject(); // "my-child-module"
+
+    // when
+    // Execute the mojo in both parent and child projects
+    setProjectToExecuteMojoIn(parentProject);
+    mojo.execute();
+
+    setProjectToExecuteMojoIn(childProject);
+    mojo.execute();
+
+    // then
+    // The commit IDs should be different for parent and child projects
+    Properties parentProperties = parentProject.getProperties();
+    Properties childProperties = childProject.getProperties();
+
+    assertThat(parentProperties).containsKey("git.commit.id.abbrev");
+    assertThat(childProperties).containsKey("git.commit.id.abbrev");
+    assertThat(parentProperties.getProperty("git.commit.id.abbrev")).isNotEqualTo(childProperties.getProperty("git.commit.id.abbrev"));
+  }
+
+
   private GitDescribeConfig createGitDescribeConfig(boolean forceLongFormat, int abbrev) {
     GitDescribeConfig gitDescribeConfig = new GitDescribeConfig();
     gitDescribeConfig.setTags(true);