Git clone button is disabled in main directory

[stefaneidelloth]

If I restart the server, the git clone button is enabled.
If I navigate into a folder that is connected with a repo and navigate
back to the main folder, the git clone button is disabled.

=> I am not able to git clone additional repositories.

Expected behavior: git clone button should be enabled if no ".git" folder exists in the current directory
nor in a parent directory.

After restart of Server:

[adammclaurin]

We're having the same problem. Refreshing the browser page seems to be a workaround but definitely should be fixed.

[wdalrymple]

Having the same issue as well, please fix!

[ianhi]

Can someone who is experiencing this issue fill out the information from the issue template:

- Python package version:
<!-- Results of `conda list jupyterlab-git` or `pip show jupyterlab-git` -->
- Extension version:
<!-- Results of `jupyter labextension list` -->
- Git version:
<!-- Results of `git --version` -->
- Operating System and its version:

as well as post the output from the command line where you ran jupyter lab

[ianhi]

Ok I see this error on version 0.22.2 but not on 0.22.1 so I suspect it was introduced by 1a9c004, in particular the set_status here:

jupyterlab-git/jupyterlab_git/handlers.py

Lines 77 to 79 in c7cf93f

	if show_top_level["code"] != 0:
	self.set_status(500)
	self.finish(json.dumps(show_top_level))

which will be set if not in a git repo and the frontend doesn't know how to handle that.

javascript console output:

Fail to find Git top level for path .
Error: fatal: not a git repository (or any of the parent directories): .git
model.js:133:41
XHRPOSThttp://localhost:8891/git/show_top_level?1603944462921
[HTTP/1.1 500 Internal Server Error 7ms]

Fail to find Git top level for path Documents.
Error: fatal: not a git repository (or any of the parent directories): .git
model.js:133:41
XHRPOSThttp://localhost:8891/git/show_top_level?1603944472237
[HTTP/1.1 500 Internal Server Error 6ms]

Fail to find Git top level for path Documents.
Error: fatal: not a git repository (or any of the parent directories): .git
model.js:133:41

terminal output:

[E 00:07:42.939 LabApp] 500 POST /git/show_top_level?1603944462921 (::1) 6.65ms referer=http://localhost:8891/lab/workspaces/auto-H
[E 00:07:52.247 LabApp] {
      "Host": "localhost:8891",
      "User-Agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:81.0) Gecko/20100101 Firefox/81.0",
      "Accept": "*/*",
      "Accept-Language": "en-US,en;q=0.5",
      "Accept-Encoding": "gzip, deflate",
      "Referer": "http://localhost:8891/lab/workspaces/auto-H",
      "Content-Type": "text/plain;charset=UTF-8",
      "Authorization": "token 5f2efe9cc3484c36d0a475af8081297c5b7381186f7394da",
      "X-Xsrftoken": "2|98253b0e|e5772faf1c4638634133dc21bb2dff18|1603428018",
      "Origin": "http://localhost:8891",
      "Content-Length": "28",
      "Dnt": "1",
      "Connection": "keep-alive",
      "Cookie": "username-localhost-8892=\"2|1:0|10:1601400096|23:username-localhost-8892|44:YmMyMDNlMzI3MzViNDY0Mzk2ZjY3MzEyMDg2NTc1YTI=|c9983aa082f4dfb13f14b2ded027bd22bc287de768997737128edd49d9614aba\"; username-localhost-8889=\"2|1:0|10:1603942592|23:username-localhost-8889|44:ZWJiMThlZWEyNmE5NDQ0YjgwZWViN2E5Y2IzZDA3MWQ=|9de9a225bab6cbd27b2c2dbcd725d49fd0894d9d3e3c2770e1bf5842bf463d54\"; username-localhost-8890=\"2|1:0|10:1603943434|23:username-localhost-8890|44:M2RmM2ZjNjM2MGYwNDE3MWIwNGVmMDQxOTE1ZjJhZmM=|6ad42cd415b50e946cd4aa7dd25895f86d4ca80a989d332a3be1b63b82cd0174\"; username-localhost-8888=\"2|1:0|10:1603912063|23:username-localhost-8888|44:ZTE2OGE2MDA0NzE0NDkxNzkxMjc2NTc2NzNkMGJiOGY=|18c43c5db5f4544c1e417174cc41507f560b0c351eb5a244bfc50475e66c7c71\"; username-localhost-8821=\"2|1:0|10:1601517324|23:username-localhost-8821|44:OGMyNTAxZGYwYzcwNDQ3OWExZGMxYjQyMzZlZDkwZDk=|3e9d8dedef5a29d86920579c926629d8bfea8cc6376d7691b5e5782f4fffcf74\"; _xsrf=2|98253b0e|e5772faf1c4638634133dc21bb2dff18|1603428018; username-localhost-8891=\"2|1:0|10:1603944472|23:username-localhost-8891|44:NzhkNTNlOWNiMDhkNDU1ZGI4ZDdiOTY0ZjM2YzM2NTg=|38c3a2aa881e88065cd3057fd1cb477a341344a71d9652e20b7ac9af1962c497\"",
      "Sec-Gpc": "1",
      "Pragma": "no-cache",
      "Cache-Control": "no-cache"
    }
[E 00:07:52.247 LabApp] 500 POST /git/show_top_level?1603944472237 (::1) 5.17ms referer=http://localhost:8891/lab/workspaces/auto-H

[fcollonval]

@ianhi Yep this is the bug source. Thanks for investigating.
The correction should not be to revert this. The fix should correct the showTopLevel (and showPrefix) method in the frontend to return a string or null (in case of error). This will abstract the method from the underlining git subprocess call as it should.