Raising IntegrityError when repository sync with empty git repository

[Jun Omae]

2014-11-28 01:10:13,981 Trac[console] ERROR: Exception in trac-admin command:
Traceback (most recent call last):
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/admin/console.py", line 110, in onecmd
    rv = cmd.Cmd.onecmd(self, line) or 0
  File "/usr/lib/python2.5/cmd.py", line 218, in onecmd
    return self.default(line)
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/admin/console.py", line 286, in default
    return self.cmd_mgr.execute_command(*args)
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/admin/api.py", line 127, in execute_command
    return f(*fargs)
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/versioncontrol/admin.py", line 155, in _do_sync
    self._sync(reponame, rev, clean=False)
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/versioncontrol/admin.py", line 139, in _sync
    repos.sync(self._sync_feedback, clean=clean)
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/tracopt/versioncontrol/git/git_fs.py", line 92, in sync
    self.save_metadata(metadata)
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/versioncontrol/cache.py", line 267, in save_metadata
    """, (self.id, CACHE_YOUNGEST_REV, ''))
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/db/util.py", line 128, in execute
    cursor.execute(query, params if params is not None else [])
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/db/util.py", line 72, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/db/sqlite_backend.py", line 80, in execute
    result = PyFormatCursor.execute(self, *args)
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/db/sqlite_backend.py", line 58, in execute
    args or [])
  File "/venv/trac/1.0.2/lib/python2.5/site-packages/trac/db/sqlite_backend.py", line 50, in _rollback_on_error
    return function(self, *args, **kwargs)
IntegrityError: columns id, name are not unique

After the issue, NULL is stored as youngest_rev in repository table. Instead, empty string should be used for the case.

sqlite> .nullvalue <NULL>
sqlite> SELECT * FROM repository;
1|name|
1|dir|/dev/shm/empty-git
1|type|git
1|repository_dir|git:/dev/shm/empty-git
1|youngest_rev|<NULL>

How to reproduce:

$ git init --bare /dev/shm/empty-git
Initialized empty Git repository in /run/shm/empty-git/
$ /venv/trac/1.0.2/bin/trac-admin /dev/shm/tracenv config set logging log_level INFO
$ /venv/trac/1.0.2/bin/trac-admin /dev/shm/tracenv config set logging log_type file
$ /venv/trac/1.0.2/bin/trac-admin /dev/shm/tracenv config set git cached_repository enabled
$ /venv/trac/1.0.2/bin/trac-admin /dev/shm/tracenv config set components 'tracopt.versioncontrol.git.*' enabled
$ /venv/trac/1.0.2/bin/trac-admin /dev/shm/tracenv repository add '(default)' /dev/shm/empty-git git
$ /venv/trac/1.0.2/bin/trac-admin /dev/shm/tracenv repository sync '(default)'
Resyncing repository history for (default)...
0 revisions cached.
Done.
$ /venv/trac/1.0.2/bin/trac-admin /dev/shm/tracenv repository sync '(default)'
Resyncing repository history for (default)...
0 revisions cached.
Done.
$ /venv/trac/1.0.2/bin/trac-admin /dev/shm/tracenv repository sync '(default)'
Resyncing repository history for (default)...
IntegrityError: columns id, name are not unique