Git fetch使用jgit失败:Remote没有<branchname>可用于获取</branchname>

时间:2012-07-03 03:59:49

标签: java git version-control jgit git-fetch

我有一个位于main.git的裸仓,我正试图在另一个仓库foo中取一个分支(test,让我们说),这只是git init }}'d:

fetchtest/
  |- main.git/
  |- test/
       |- .git/

使用常规git命令,我可以执行git fetch ../main.git foo:foo,这将在foo中创建一个新分支test/并获取分支所需的对象。 然后我想做同样的事情但是以编程方式使用JGit,即不使用git CLI而只使用Java代码。我无法使用git CLI:

Git git = Git.init().setDirectory(new File("fetchtest/test/")).call();

git.fetch().setRemote(new File("../main.git"))
           .setRefSpecs(new RefSpec("foo:foo"))
           .call();

但它只是错误:

org.eclipse.jgit.api.errors.TransportException: Remote does not have foo available for fetch.
    at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:137)
    // ......
Caused by: org.eclipse.jgit.errors.TransportException: Remote does not have foo available for fetch.
    at org.eclipse.jgit.transport.FetchProcess.expandSingle(FetchProcess.java:349)
    at org.eclipse.jgit.transport.FetchProcess.executeImp(FetchProcess.java:139)
    at org.eclipse.jgit.transport.FetchProcess.execute(FetchProcess.java:113)
    at org.eclipse.jgit.transport.Transport.fetch(Transport.java:1069)
    at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:128)

如何让它发挥作用?

1 个答案:

答案 0 :(得分:4)

应该做些什么:

Git git = Git.init().setDirectory(new File("fetchtest/test/")).call();

git.fetch().setRemote(new File("../main.git"))
           .setRefSpecs(new RefSpec("refs/heads/foo:refs/heads/foo"))
           .call();

请注意RefSpec定义 至少,试试你的例子:

new RefSpec("refs/heads/foo:refs/heads/foo")

RefSpec class提及:

/**
 * Parse a ref specification for use during transport operations.
 * <p>
 * Specifications are typically one of the following forms:
 * <ul>
 * <li><code>refs/head/master</code></li>
 * <li><code>refs/head/master:refs/remotes/origin/master</code></li>
 * <li><code>refs/head/*:refs/remotes/origin/*</code></li>
 * <li><code>+refs/head/master</code></li>
 * <li><code>+refs/head/master:refs/remotes/origin/master</code></li>
 * <li><code>+refs/head/*:refs/remotes/origin/*</code></li>
 * <li><code>:refs/head/master</code></li>
 * </ul>
 *
 * @param spec
 * string describing the specification.
 * @throws IllegalArgumentException
 * the specification is invalid.
*/

所以“refs/head/”似乎是强制性的。


原始答案:

setRemote() function on api.FetchCommand采用名称或URI。

在查看FetchCommandTest URI定义时,我更喜欢让遥控器更加明显:
我宁愿为你的第二个回购(引用你的第一个回购)定义一个命名的遥控器(在下面:“test”),然后再获取。

// setup the first repository to fetch from the second repository
final StoredConfig config = db.getConfig();
RemoteConfig remoteConfig = new RemoteConfig(config, "test");
URIish uri = new URIish(db2.getDirectory().toURI().toURL());
remoteConfig.addURI(uri);
remoteConfig.update(config);
config.save();

// create some refs via commits and tag
RevCommit commit = git2.commit().setMessage("initial commit").call();
Ref tagRef = git2.tag().setName("tag").call();

Git git1 = new Git(db);

RefSpec spec = new RefSpec("refs/heads/master:refs/heads/x");
git1.fetch().setRemote("test").setRefSpecs(spec)
.call();