Fix print version when we have an empty repository [patch]

Author: Hugo Dias

src/main/java/pt/com/hugodias/gradle/gitversioner/core/version/Version.java

@@ -24,7 +24,7 @@ public String print(String pattern) {
             .replace("%c", String.valueOf(commit))
             .replace("%b", branch)
             .replace("%H", hash)
-            .replace("%h", hash.substring(0, 7));
+            .replace("%h", hash.isEmpty() ? "" : hash.substring(0, 7));
     return commit != 0 ? removeParentheses(filledVersion) : removeCommitConditionals(filledVersion);
   }
 

src/test/java/pt/com/hugodias/gradle/gitversioner/tasks/PrintVersionTaskTest.java

@@ -53,6 +53,18 @@ void testPrintsVersionUsingDefinedConfigurationGroovy() throws IOException, GitA
     assertThat(result.getOutput()).contains("2.1.1-4");
   }
 
+  @DisplayName(
+      "prints version using default configuration when none is supplied in Groovy and we have an empty repository")
+  @Test
+  void testPrintsVersionUsingDefaultConfigurationGroovyEmptyRepository()
+      throws IOException, GitAPIException {
+    project.withSettingsFile().withGit().withGroovyGradleFile("default");
+
+    BuildResult result = gradle.runTask("printVersion");
+
+    assertThat(result.getOutput()).contains("0.0.0");
+  }
+
   private void addCommits() throws GitAPIException {
     project
         .withCommit("trex")