Unable to get a copy of private bzr repositories using 'bzr branch' on mantic & noble

[Guruprasad]

When trying to get a copy of a branch of a private bzr repository using a command like `bzr branch lp:<private bzr repository name>`, it errors out with an exception that looks like.

<snip>
❯ bzr branch lp:<private bzr repository>
Ignoring insteadOf lp: in git config, because the Launchpad plugin is loaded.
brz: ERROR: lazr.restfulclient.errors.ServerError: HTTP Error 500: Internal Server Error
Response headers:
---
-content-encoding: gzip
connection: close
content-length: 2336
content-type: text/plain;charset=utf-8
date: Fri, 06 Oct 2023 08:20:32 GMT
server: gunicorn
status: 500
vary: Accept-Encoding
x-lazr-oopsid: OOPS-ed564e31c31cb77087ac3e21adc82c40
x-powered-by: Zope (www.zope.org), Python (www.python.org)
x-request-id: 06077fe8-3016-427d-8ffb-1ce704a883b9
x-vcs-revision: bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596
---
Response body:
---
b'Private branch ~<user>/<private bzr repository>/trunk has no public URL.\n\nTraceback (most recent call last):\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/zope/publisher/publish.py", line 146, in publish\n result = publication.callObject(request, obj)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/publisher.py", line 221, in callObject\n value = super().callObject(request, object)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/lib/lp/services/webapp/publication.py", line 446, in callObject\n return mapply(ob, request.getPositionalArguments(), request)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/zope/publisher/publish.py", line 119, in mapply\n return debug_call(obj, args)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/zope/publisher/publish.py", line 126, in debug_call\n return obj(*args)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/_resource.py", line 954, in __call__\n result = self.do_GET()\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/_resource.py", line 1621, in do_GET\n result = self.handleCustomGET(operation_name)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/_resource.py", line 749, in handleCustomGET\n return operation()\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/_operation.py", line 94, in __call__\n response = self.call(**values)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/declarations.py", line 1655, in call\n result = self._getMethod()(**params)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/lib/lp/code/model/branch.py", line 854, in composePublicURL\n assert not (self.private and scheme in public_schemes), (\nAssertionError: Private branch ~<user>/<private bzr repository>/trunk has no public URL.\n'
---

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/breezy/commands.py", line 1032, in exception_to_return_code
    return the_callable(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/commands.py", line 1224, in run_bzr
    ret = run(*run_argv)
          ^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/commands.py", line 774, in run_argv_aliases
    return self.run(**all_cmd_args)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/commands.py", line 799, in run
    return class_run(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/builtins.py", line 1456, in run
    accelerator_tree, br_from = controldir.ControlDir.open_tree_or_branch(
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/controldir.py", line 885, in open_tree_or_branch
    controldir = klass.open(location)
                 ^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/controldir.py", line 789, in open
    t = _mod_transport.get_transport(base, possible_transports)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/transport/__init__.py", line 1594, in get_transport
    location_to_url(base, purpose=purpose),
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/location.py", line 141, in location_to_url
    location = directories.dereference(location, purpose)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/directory_service.py", line 87, in dereference
    return directory.look_up(name, url, purpose=purpose)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/plugins/launchpad/lp_directory.py", line 137, in look_up
    return _resolve(url)
           ^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/plugins/launchpad/lp_directory.py", line 106, in _resolve
    result = _resolve_via_api(path, url)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/breezy/plugins/launchpad/lp_directory.py", line 91, in _resolve_via_api
    join(lp_branch.composePublicURL(scheme='http'), *subpaths)]}
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 642, in __call__
    response, content = self.root._browser._request(
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/lazr/restfulclient/_browser.py", line 484, in _request
    raise error
lazr.restfulclient.errors.ServerError: HTTP Error 500: Internal Server Error
Response headers:
---
-content-encoding: gzip
connection: close
content-length: 2336
content-type: text/plain;charset=utf-8
date: Fri, 06 Oct 2023 08:20:32 GMT
server: gunicorn
status: 500
vary: Accept-Encoding
x-lazr-oopsid: OOPS-ed564e31c31cb77087ac3e21adc82c40
x-powered-by: Zope (www.zope.org), Python (www.python.org)
x-request-id: 06077fe8-3016-427d-8ffb-1ce704a883b9
x-vcs-revision: bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596
---
Response body:
---
b'Private branch ~<user>/<private bzr repository>/trunk has no public URL.\n\nTraceback (most recent call last):\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/zope/publisher/publish.py", line 146, in publish\n result = publication.callObject(request, obj)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/publisher.py", line 221, in callObject\n value = super().callObject(request, object)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/lib/lp/services/webapp/publication.py", line 446, in callObject\n return mapply(ob, request.getPositionalArguments(), request)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/zope/publisher/publish.py", line 119, in mapply\n return debug_call(obj, args)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/zope/publisher/publish.py", line 126, in debug_call\n return obj(*args)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/_resource.py", line 954, in __call__\n result = self.do_GET()\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/_resource.py", line 1621, in do_GET\n result = self.handleCustomGET(operation_name)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/_resource.py", line 749, in handleCustomGET\n return operation()\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/_operation.py", line 94, in __call__\n response = self.call(**values)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/env/lib/python3.8/site-packages/lazr/restful/declarations.py", line 1655, in call\n result = self._getMethod()(**params)\n File "/srv/launchpad/payloads/bd6cfd0cfc024dbe1dcd7d5d91165fb4f6a6c596/lib/lp/code/model/branch.py", line 854, in composePublicURL\n assert not (self.private and scheme in public_schemes), (\nAssertionError: Private branch ~<user>/<private bzr repository>/trunk has no public URL.\n'
---

You can report this problem to Breezy's developers by running
    apport-bug /var/crash/brz.1000.2023-10-06T08:20.crash
if a bug-reporting window does not automatically appear.
</snip>

This issue _could_ be related to the issue(s) discussed in https://code.launchpad.net/~jelmer/launchpad/+git/launchpad/+merge/435608

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jürgen Gmach (jugmac00)]

Workaround - from an internal discussion (https://chat.canonical.com/canonical/pl/wmbztgw7ifrufpyx77zgqzeacc)

> if you are on mantic, bzr is broken when using lp:// short form URLs for private repositories.

> lp+bzr: works in that case

> eg bzr branch lp+bzr:canonical-sshebang

[Haw Loeung (hloeung)]

The workaround doesn't work for me?

| [hloeung@dharkan tmp]$ bzr branch lp+bzr:canonical-sshebang
| ...
|
| lazr.restfulclient.errors.ServerError: HTTP Error 500: Internal Server Error
| Response headers:
| ---
| connection: close
| content-length: 14
| content-type: text/plain;charset=utf-8
| date: Thu, 29 Feb 2024 01:47:10 GMT
| server: gunicorn
| status: 500
| x-lazr-oopsid: OOPS-5b2b04c2eb781d9c86031e2a31b56739
| x-powered-by: Zope (www.zope.org), Python (www.python.org)
| x-request-id: d23d8481-48de-495f-a8ff-520577cedfe0
| x-vcs-revision: 9643586c585856148a18782148972ae9c1179d06
| ---
| Response body:
| ---
| b'AssertionError'
| ---
|
|
| brz 3.3.5 on python 3.12.2 (Linux-6.6.0-14-generic-x86_64-with-glibc2.39)
| arguments: ['bzr', 'branch', 'lp+bzr:canonical-sshebang']
| plugins: bash_completion[3.3.5], changelog_merge[3.3.5],
| commitfromnews[3.3.5], cvs[3.3.5], darcs[3.3.5], email[3.3.5],
| etckeeper[unknown], fastimport[3.3.5], flake8[unknown], fossil[3.3.5],
| github[3.3.5], gitlab[3.3.5], hg[3.3.5], launchpad[3.3.5], mtn[3.3.5],
| netrc_credential_store[3.3.5], news_merge[3.3.5], po_merge[3.3.5],
| propose[3.3.5], pypi[3.3.5], quilt[unknown], repodebug[3.3.5],
| rewrite[unknown], stats[3.3.5], svn[3.3.5], upload[3.3.5],
| weave_fmt[3.3.5], webdav[3.3.5], zsh_completion[3.3.5]
| encoding: 'utf-8', fsenc: 'utf-8', lang: 'en_US.utf8'
|
| *** Breezy has encountered an internal error. This probably indicates a
| bug in Breezy. You can help us fix it by filing a bug report at
| https://bugs.launchpad.net/brz/+filebug
| including this traceback and a description of the problem.

[Guruprasad (lgp171188)]

I can confirm that I see the same issue as Haw with the workaround. What works is

bzr branch bzr+ssh://<email address hidden>/~canonical-sshebang/canonical-sshebang/trunk canonical-sshebang

[Bin Li (binli)]

I met this issue too.

$ bzr branch lp:~binli/oem-archive-projects/support-noble
brz: ERROR: lazr.restfulclient.errors.ServerError: HTTP Error 500: Internal Server Error
Response headers:
---
connection: close
content-length: 14
content-type: text/plain;charset=utf-8
date: Mon, 11 Mar 2024 08:16:19 GMT
server: gunicorn
status: 500
x-lazr-oopsid: OOPS-e803fd818b75a535a7d1928da8607589
x-powered-by: Zope (www.zope.org), Python (www.python.org)
x-request-id: 9ddf4fc3-c188-49c1-953b-effdb3a5d9ef
x-vcs-revision: 2e4955e3d556e61e2eb54acf7a827d17e9e46822
---
Response body:
---
b'AssertionError'

[Bin Li (binli)]

The workaround works fine in my side.

bzr branch bzr+ssh://bazaar.launchpad.net/~binli/oem-archive-projects/support-noble