init: allow specifying the initial branch name for the new repository

Add option --initial-branch/-b to InitCommand and the CLI init command.
This is the first step to implement support for the new option
init.defaultBranch. Both were added to git in release 2.28.

See https://git-scm.com/docs/git-init#Documentation/git-init.txt--bltbranch-namegt

Bug: 564794
Change-Id: Ia383b3f90b5549db80f99b2310450a7faf6bce4c
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

1 files changed, 35 insertions, 1 deletions

diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/InitCommandTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/InitCommandTest.java
index 1c18b5a8b1..14c52c207a 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/InitCommandTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/InitCommandTest.java
@@ -9,6 +9,7 @@
  */
 package org.eclipse.jgit.api;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
@@ -42,7 +43,23 @@ public class InitCommandTest extends RepositoryTestCase {
 		InitCommand command = new InitCommand();
 		command.setDirectory(directory);
 		try (Git git = command.call()) {
-			assertNotNull(git.getRepository());
+			Repository r = git.getRepository();
+			assertNotNull(r);
+			assertEquals("refs/heads/master", r.getFullBranch());
+		}
+	}
+
+	@Test
+	public void testInitRepositoryMainInitialBranch()
+			throws IOException, JGitInternalException, GitAPIException {
+		File directory = createTempDirectory("testInitRepository");
+		InitCommand command = new InitCommand();
+		command.setDirectory(directory);
+		command.setInitialBranch("main");
+		try (Git git = command.call()) {
+			Repository r = git.getRepository();
+			assertNotNull(r);
+			assertEquals("refs/heads/main", r.getFullBranch());
 		}
 	}
 
@@ -72,6 +89,23 @@ public class InitCommandTest extends RepositoryTestCase {
 			Repository repository = git.getRepository();
 			assertNotNull(repository);
 			assertTrue(repository.isBare());
+			assertEquals("refs/heads/master", repository.getFullBranch());
+		}
+	}
+
+	@Test
+	public void testInitBareRepositoryMainInitialBranch()
+			throws IOException, JGitInternalException, GitAPIException {
+		File directory = createTempDirectory("testInitBareRepository");
+		InitCommand command = new InitCommand();
+		command.setDirectory(directory);
+		command.setBare(true);
+		command.setInitialBranch("main");
+		try (Git git = command.call()) {
+			Repository repository = git.getRepository();
+			assertNotNull(repository);
+			assertTrue(repository.isBare());
+			assertEquals("refs/heads/main", repository.getFullBranch());
 		}
 	}