我有一个 svn 存储库，用于使用 svn+ssh 协议签出。它有一些 EXTERNALS 用 svn+ssh URL 引用它自己。
我离开这个项目有一段时间了，直到今天。当我尝试访问 svn+ssh url（几个月前曾经工作过）时，我收到了消息svn: No repository found in 'svn+ssh://my-correct.hostname.com/the/right/path/to/the/repository。我仔细检查了，路径和主机名都是正确的。
我尝试在使用file://URL 托管 repo 的机器上检查它，它成功了，直到它必须检查 EXTERNALS，它在该No repository消息中失败。我在本地和远程使用相同的用户。
我应该在哪里寻找日志/调试信息来解决这个问题？
感谢您向我介绍 strace。我使用 strace 来调试命令的原因：
svn+ssh://HOSTNAME/path/to/svn/directory
将无法识别 ~/.ssh/config 中的这一行：
Host HOSTNAME
要使用 strace，请在 ~/.subversion/config 的 [tunnels] 部分中。我改变了这个：
ssh = ssh -o ControlMaster=no
对此：
ssh = strace -o tmp ssh -o ControlMaster=no
然后我运行了这个命令：
svn list svn+ssh://HOSTNAME/path/to/svn/directory
查看进入文件“tmp”的 strace 的输出，我可以看到“HOSTNAME”作为“主机名”传递给 ssh 命令。快速修复是在 ~/.ssh/config 中更改此行：
Host HOSTNAME
对此：
Host HOSTNAME hostname
无论主机名作为“HOSTNAME”还是“hostname”传递给 ssh，这都会导致应用特定于主机的设置。
我不知道在哪里可以找到日志，但我认为您可以使用以下命令删除/更改该目录中的 externals 属性：
svn propedit svn:externals path/to/dir
I found my way through. I'm writing it here for future reference.
EDIT: It turns out a fellow colleague modified that file without notifying. Yet finding the cause of the problem was more difficult than ideal.
Long story short: even if I used the url svn+ssh://my-correct.hostname.com/the/right/path/to/the/repository the real path looked up on the server was /var/svn/the/right/path/to/the/repository. A wrong path indeed. But I think that the steps I did to find this might be useful to others, so I'll report them here.
First I moved (on the server) /usr/bin/svnserve to /usr/bin/svnserve.orig and put my own svnserve with these contents:
#!/bin/bash
strace -o /tmp/svntrace /usr/bin/svnserve.orig $@ | tee /tmp/svnserve-out
Then I run my checkout again, and after that /tmp/svntrace on the server had in its tail all the info I needed to troubleshoot the problem.
It seems that in the file /var/svn/svnwrapper.sh a new root for svn was set with the -r option. After removing that all worked like a charm.
I still can't understand what happened (it used to work in the past and I'm almost sure I didn't change anything).
strace 帮助隔离了这个问题。我的存储库位于 /var/svn/repos 但跟踪显示它无法找到 /repos/format。我在 /repos 添加了一个指向 /var/svn/repos 的符号链接，它又开始工作了。