vcs: fixed issues with calling get_changesets method doesn't

throws EmptyRepositoryError when called on empty repos

rhodecode/lib/vcs/backends/git/repository.py

@@ -1,695 +1,710 b''
 # -*- coding: utf-8 -*-
 """
     vcs.backends.git.repository
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
     Git repository implementation.
 
     :created_on: Apr 8, 2010
     :copyright: (c) 2010-2011 by Marcin Kuzminski, Lukasz Balcerzak.
 """
 
 import os
 import re
 import time
 import urllib
 import urllib2
 import logging
 import posixpath
 import string
 
 from dulwich.objects import Tag
 from dulwich.repo import Repo, NotGitRepository
 
 from rhodecode.lib.vcs import subprocessio
 from rhodecode.lib.vcs.backends.base import BaseRepository, CollectionGenerator
 from rhodecode.lib.vcs.conf import settings
 
 from rhodecode.lib.vcs.exceptions import (
     BranchDoesNotExistError, ChangesetDoesNotExistError, EmptyRepositoryError,
     RepositoryError, TagAlreadyExistError, TagDoesNotExistError
 )
 from rhodecode.lib.vcs.utils import safe_unicode, makedate, date_fromtimestamp
 from rhodecode.lib.vcs.utils.lazy import LazyProperty
 from rhodecode.lib.vcs.utils.ordered_dict import OrderedDict
 from rhodecode.lib.vcs.utils.paths import abspath, get_user_home
 
 from rhodecode.lib.vcs.utils.hgcompat import (
     hg_url, httpbasicauthhandler, httpdigestauthhandler
 )
 
 from .changeset import GitChangeset
 from .config import ConfigFile
 from .inmemory import GitInMemoryChangeset
 from .workdir import GitWorkdir
 
 SHA_PATTERN = re.compile(r'^[[0-9a-fA-F]{12}|[0-9a-fA-F]{40}]$')
 
 log = logging.getLogger(__name__)
 
 
 class GitRepository(BaseRepository):
     """
     Git repository backend.
     """
     DEFAULT_BRANCH_NAME = 'master'
     scm = 'git'
 
     def __init__(self, repo_path, create=False, src_url=None,
                  update_after_clone=False, bare=False):
 
         self.path = abspath(repo_path)
         repo = self._get_repo(create, src_url, update_after_clone, bare)
         self.bare = repo.bare
 
     @property
     def _config_files(self):
         return [
             self.bare and abspath(self.path, 'config')
                       or abspath(self.path, '.git', 'config'),
              abspath(get_user_home(), '.gitconfig'),
          ]
 
     @property
     def _repo(self):
         return Repo(self.path)
 
     @property
     def head(self):
         try:
             return self._repo.head()
         except KeyError:
             return None
 
+    @property
+    def _empty(self):
+        """
+        Checks if repository is empty ie. without any changesets
+        """
+
+        try:
+            self.revisions[0]
+        except (KeyError, IndexError):
+            return True
+        return False
+
     @LazyProperty
     def revisions(self):
         """
         Returns list of revisions' ids, in ascending order.  Being lazy
         attribute allows external tools to inject shas from cache.
         """
         return self._get_all_revisions()
 
     @classmethod
     def _run_git_command(cls, cmd, **opts):
         """
         Runs given ``cmd`` as git command and returns tuple
         (stdout, stderr).
 
         :param cmd: git command to be executed
         :param opts: env options to pass into Subprocess command
         """
 
         if '_bare' in opts:
             _copts = []
             del opts['_bare']
         else:
             _copts = ['-c', 'core.quotepath=false', ]
         safe_call = False
         if '_safe' in opts:
             #no exc on failure
             del opts['_safe']
             safe_call = True
 
         _str_cmd = False
         if isinstance(cmd, basestring):
             cmd = [cmd]
             _str_cmd = True
 
         gitenv = os.environ
         # need to clean fix GIT_DIR !
         if 'GIT_DIR' in gitenv:
             del gitenv['GIT_DIR']
         gitenv['GIT_CONFIG_NOGLOBAL'] = '1'
 
         _git_path = settings.GIT_EXECUTABLE_PATH
         cmd = [_git_path] + _copts + cmd
         if _str_cmd:
             cmd = ' '.join(cmd)
 
         try:
             _opts = dict(
                 env=gitenv,
                 shell=True,
             )
             _opts.update(opts)
             p = subprocessio.SubprocessIOChunker(cmd, **_opts)
         except (EnvironmentError, OSError), err:
             tb_err = ("Couldn't run git command (%s).\n"
                       "Original error was:%s\n" % (cmd, err))
             log.error(tb_err)
             if safe_call:
                 return '', err
             else:
                 raise RepositoryError(tb_err)
 
         return ''.join(p.output), ''.join(p.error)
 
     def run_git_command(self, cmd):
         opts = {}
         if os.path.isdir(self.path):
             opts['cwd'] = self.path
         return self._run_git_command(cmd, **opts)
 
     @classmethod
     def _check_url(cls, url):
         """
         Functon will check given url and try to verify if it's a valid
         link. Sometimes it may happened that mercurial will issue basic
         auth request that can cause whole API to hang when used from python
         or other external calls.
 
         On failures it'll raise urllib2.HTTPError
         """
 
         # check first if it's not an local url
         if os.path.isdir(url) or url.startswith('file:'):
             return True
 
         if('+' in url[:url.find('://')]):
             url = url[url.find('+') + 1:]
 
         handlers = []
         test_uri, authinfo = hg_url(url).authinfo()
         if not test_uri.endswith('info/refs'):
             test_uri = test_uri.rstrip('/') + '/info/refs'
         if authinfo:
             #create a password manager
             passmgr = urllib2.HTTPPasswordMgrWithDefaultRealm()
             passmgr.add_password(*authinfo)
 
             handlers.extend((httpbasicauthhandler(passmgr),
                              httpdigestauthhandler(passmgr)))
 
         o = urllib2.build_opener(*handlers)
         o.addheaders = [('User-Agent', 'git/1.7.8.0')]  # fake some git
 
         q = {"service": 'git-upload-pack'}
         qs = '?%s' % urllib.urlencode(q)
         cu = "%s%s" % (test_uri, qs)
         req = urllib2.Request(cu, None, {})
 
         try:
             resp = o.open(req)
             return resp.code == 200
         except Exception, e:
             # means it cannot be cloned
             raise urllib2.URLError("[%s] %s" % (url, e))
 
     def _get_repo(self, create, src_url=None, update_after_clone=False,
                   bare=False):
         if create and os.path.exists(self.path):
             raise RepositoryError("Location already exist")
         if src_url and not create:
             raise RepositoryError("Create should be set to True if src_url is "
                                   "given (clone operation creates repository)")
         try:
             if create and src_url:
                 GitRepository._check_url(src_url)
                 self.clone(src_url, update_after_clone, bare)
                 return Repo(self.path)
             elif create:
                 os.mkdir(self.path)
                 if bare:
                     return Repo.init_bare(self.path)
                 else:
                     return Repo.init(self.path)
             else:
                 return self._repo
         except (NotGitRepository, OSError), err:
             raise RepositoryError(err)
 
     def _get_all_revisions(self):
         # we must check if this repo is not empty, since later command
         # fails if it is. And it's cheaper to ask than throw the subprocess
         # errors
         try:
             self._repo.head()
         except KeyError:
             return []
 
         rev_filter = _git_path = settings.GIT_REV_FILTER
         cmd = 'rev-list %s --reverse --date-order' % (rev_filter)
         try:
             so, se = self.run_git_command(cmd)
         except RepositoryError:
             # Can be raised for empty repositories
             return []
         return so.splitlines()
 
     def _get_all_revisions2(self):
         #alternate implementation using dulwich
         includes = [x[1][0] for x in self._parsed_refs.iteritems()
                     if x[1][1] != 'T']
         return [c.commit.id for c in self._repo.get_walker(include=includes)]
 
     def _get_revision(self, revision):
         """
         For git backend we always return integer here. This way we ensure
         that changset's revision attribute would become integer.
         """
 
         is_null = lambda o: len(o) == revision.count('0')
 
-        try:
-            self.revisions[0]
-        except (KeyError, IndexError):
+        if self._empty:
             raise EmptyRepositoryError("There are no changesets yet")
 
         if revision in (None, '', 'tip', 'HEAD', 'head', -1):
             return self.revisions[-1]
 
         is_bstr = isinstance(revision, (str, unicode))
         if ((is_bstr and revision.isdigit() and len(revision) < 12)
             or isinstance(revision, int) or is_null(revision)):
             try:
                 revision = self.revisions[int(revision)]
             except Exception:
                 raise ChangesetDoesNotExistError("Revision %s does not exist "
                     "for this repository" % (revision))
 
         elif is_bstr:
             # get by branch/tag name
             _ref_revision = self._parsed_refs.get(revision)
             if _ref_revision:  # and _ref_revision[1] in ['H', 'RH', 'T']:
                 return _ref_revision[0]
 
             _tags_shas = self.tags.values()
             # maybe it's a tag ? we don't have them in self.revisions
             if revision in _tags_shas:
                 return _tags_shas[_tags_shas.index(revision)]
 
             elif not SHA_PATTERN.match(revision) or revision not in self.revisions:
                 raise ChangesetDoesNotExistError("Revision %s does not exist "
                     "for this repository" % (revision))
 
         # Ensure we return full id
         if not SHA_PATTERN.match(str(revision)):
             raise ChangesetDoesNotExistError("Given revision %s not recognized"
                 % revision)
         return revision
 
     def _get_archives(self, archive_name='tip'):
 
         for i in [('zip', '.zip'), ('gz', '.tar.gz'), ('bz2', '.tar.bz2')]:
                 yield {"type": i[0], "extension": i[1], "node": archive_name}
 
     def _get_url(self, url):
         """
         Returns normalized url. If schema is not given, would fall to
         filesystem (``file:///``) schema.
         """
         url = str(url)
         if url != 'default' and not '://' in url:
             url = ':///'.join(('file', url))
         return url
 
     def get_hook_location(self):
         """
         returns absolute path to location where hooks are stored
         """
         loc = os.path.join(self.path, 'hooks')
         if not self.bare:
             loc = os.path.join(self.path, '.git', 'hooks')
         return loc
 
     @LazyProperty
     def name(self):
         return os.path.basename(self.path)
 
     @LazyProperty
     def last_change(self):
         """
         Returns last change made on this repository as datetime object
         """
         return date_fromtimestamp(self._get_mtime(), makedate()[1])
 
     def _get_mtime(self):
         try:
             return time.mktime(self.get_changeset().date.timetuple())
         except RepositoryError:
             idx_loc = '' if self.bare else '.git'
             # fallback to filesystem
             in_path = os.path.join(self.path, idx_loc, "index")
             he_path = os.path.join(self.path, idx_loc, "HEAD")
             if os.path.exists(in_path):
                 return os.stat(in_path).st_mtime
             else:
                 return os.stat(he_path).st_mtime
 
     @LazyProperty
     def description(self):
         idx_loc = '' if self.bare else '.git'
         undefined_description = u'unknown'
         description_path = os.path.join(self.path, idx_loc, 'description')
         if os.path.isfile(description_path):
             return safe_unicode(open(description_path).read())
         else:
             return undefined_description
 
     @LazyProperty
     def contact(self):
         undefined_contact = u'Unknown'
         return undefined_contact
 
     @property
     def branches(self):
         if not self.revisions:
             return {}
         sortkey = lambda ctx: ctx[0]
         _branches = [(x[0], x[1][0])
                      for x in self._parsed_refs.iteritems() if x[1][1] == 'H']
         return OrderedDict(sorted(_branches, key=sortkey, reverse=False))
 
     @LazyProperty
     def tags(self):
         return self._get_tags()
 
     def _get_tags(self):
         if not self.revisions:
             return {}
 
         sortkey = lambda ctx: ctx[0]
         _tags = [(x[0], x[1][0])
                  for x in self._parsed_refs.iteritems() if x[1][1] == 'T']
         return OrderedDict(sorted(_tags, key=sortkey, reverse=True))
 
     def tag(self, name, user, revision=None, message=None, date=None,
             **kwargs):
         """
         Creates and returns a tag for the given ``revision``.
 
         :param name: name for new tag
         :param user: full username, i.e.: "Joe Doe <[e-mail]>"
         :param revision: changeset id for which new tag would be created
         :param message: message of the tag's commit
         :param date: date of tag's commit
 
         :raises TagAlreadyExistError: if tag with same name already exists
         """
         if name in self.tags:
             raise TagAlreadyExistError("Tag %s already exists" % name)
         changeset = self.get_changeset(revision)
         message = message or "Added tag %s for commit %s" % (name,
             changeset.raw_id)
         self._repo.refs["refs/tags/%s" % name] = changeset._commit.id
 
         self._parsed_refs = self._get_parsed_refs()
         self.tags = self._get_tags()
         return changeset
 
     def remove_tag(self, name, user, message=None, date=None):
         """
         Removes tag with the given ``name``.
 
         :param name: name of the tag to be removed
         :param user: full username, i.e.: "Joe Doe <[e-mail]>"
         :param message: message of the tag's removal commit
         :param date: date of tag's removal commit
 
         :raises TagDoesNotExistError: if tag with given name does not exists
         """
         if name not in self.tags:
             raise TagDoesNotExistError("Tag %s does not exist" % name)
         tagpath = posixpath.join(self._repo.refs.path, 'refs', 'tags', name)
         try:
             os.remove(tagpath)
             self._parsed_refs = self._get_parsed_refs()
             self.tags = self._get_tags()
         except OSError, e:
             raise RepositoryError(e.strerror)
 
     @LazyProperty
     def _parsed_refs(self):
         return self._get_parsed_refs()
 
     def _get_parsed_refs(self):
         # cache the property
         _repo = self._repo
         refs = _repo.get_refs()
         keys = [('refs/heads/', 'H'),
                 ('refs/remotes/origin/', 'RH'),
                 ('refs/tags/', 'T')]
         _refs = {}
         for ref, sha in refs.iteritems():
             for k, type_ in keys:
                 if ref.startswith(k):
                     _key = ref[len(k):]
                     if type_ == 'T':
                         obj = _repo.get_object(sha)
                         if isinstance(obj, Tag):
                             sha = _repo.get_object(sha).object[1]
                     _refs[_key] = [sha, type_]
                     break
         return _refs
 
     def _heads(self, reverse=False):
         refs = self._repo.get_refs()
         heads = {}
 
         for key, val in refs.items():
             for ref_key in ['refs/heads/', 'refs/remotes/origin/']:
                 if key.startswith(ref_key):
                     n = key[len(ref_key):]
                     if n not in ['HEAD']:
                         heads[n] = val
 
         return heads if reverse else dict((y, x) for x, y in heads.iteritems())
 
     def get_changeset(self, revision=None):
         """
         Returns ``GitChangeset`` object representing commit from git repository
         at the given revision or head (most recent commit) if None given.
         """
         if isinstance(revision, GitChangeset):
             return revision
         revision = self._get_revision(revision)
         changeset = GitChangeset(repository=self, revision=revision)
         return changeset
 
     def get_changesets(self, start=None, end=None, start_date=None,
            end_date=None, branch_name=None, reverse=False):
         """
         Returns iterator of ``GitChangeset`` objects from start to end (both
         are inclusive), in ascending date order (unless ``reverse`` is set).
 
         :param start: changeset ID, as str; first returned changeset
         :param end: changeset ID, as str; last returned changeset
         :param start_date: if specified, changesets with commit date less than
           ``start_date`` would be filtered out from returned set
         :param end_date: if specified, changesets with commit date greater than
           ``end_date`` would be filtered out from returned set
         :param branch_name: if specified, changesets not reachable from given
           branch would be filtered out from returned set
         :param reverse: if ``True``, returned generator would be reversed
           (meaning that returned changesets would have descending date order)
 
         :raise BranchDoesNotExistError: If given ``branch_name`` does not
             exist.
         :raise ChangesetDoesNotExistError: If changeset for given ``start`` or
           ``end`` could not be found.
 
         """
         if branch_name and branch_name not in self.branches:
             raise BranchDoesNotExistError("Branch '%s' not found" \
                                           % branch_name)
+        # actually we should check now if it's not an empty repo to not spaw
+        # subprocess commands
+        if self._empty:
+            raise EmptyRepositoryError("There are no changesets yet")
+
         # %H at format means (full) commit hash, initial hashes are retrieved
         # in ascending date order
         cmd_template = 'log --date-order --reverse --pretty=format:"%H"'
         cmd_params = {}
         if start_date:
             cmd_template += ' --since "$since"'
             cmd_params['since'] = start_date.strftime('%m/%d/%y %H:%M:%S')
         if end_date:
             cmd_template += ' --until "$until"'
             cmd_params['until'] = end_date.strftime('%m/%d/%y %H:%M:%S')
         if branch_name:
             cmd_template += ' $branch_name'
             cmd_params['branch_name'] = branch_name
         else:
             rev_filter = _git_path = settings.GIT_REV_FILTER
             cmd_template += ' %s' % (rev_filter)
 
         cmd = string.Template(cmd_template).safe_substitute(**cmd_params)
         revs = self.run_git_command(cmd)[0].splitlines()
         start_pos = 0
         end_pos = len(revs)
         if start:
             _start = self._get_revision(start)
             try:
                 start_pos = revs.index(_start)
             except ValueError:
                 pass
 
         if end is not None:
             _end = self._get_revision(end)
             try:
                 end_pos = revs.index(_end)
             except ValueError:
                 pass
 
         if None not in [start, end] and start_pos > end_pos:
             raise RepositoryError('start cannot be after end')
 
         if end_pos is not None:
             end_pos += 1
 
         revs = revs[start_pos:end_pos]
         if reverse:
             revs = reversed(revs)
         return CollectionGenerator(self, revs)
 
     def get_diff(self, rev1, rev2, path=None, ignore_whitespace=False,
                  context=3):
         """
         Returns (git like) *diff*, as plain text. Shows changes introduced by
         ``rev2`` since ``rev1``.
 
         :param rev1: Entry point from which diff is shown. Can be
           ``self.EMPTY_CHANGESET`` - in this case, patch showing all
           the changes since empty state of the repository until ``rev2``
         :param rev2: Until which revision changes should be shown.
         :param ignore_whitespace: If set to ``True``, would not show whitespace
           changes. Defaults to ``False``.
         :param context: How many lines before/after changed lines should be
           shown. Defaults to ``3``.
         """
         flags = ['-U%s' % context, '--full-index', '--binary', '-p', '-M', '--abbrev=40']
         if ignore_whitespace:
             flags.append('-w')
 
         if hasattr(rev1, 'raw_id'):
             rev1 = getattr(rev1, 'raw_id')
 
         if hasattr(rev2, 'raw_id'):
             rev2 = getattr(rev2, 'raw_id')
 
         if rev1 == self.EMPTY_CHANGESET:
             rev2 = self.get_changeset(rev2).raw_id
             cmd = ' '.join(['show'] + flags + [rev2])
         else:
             rev1 = self.get_changeset(rev1).raw_id
             rev2 = self.get_changeset(rev2).raw_id
             cmd = ' '.join(['diff'] + flags + [rev1, rev2])
 
         if path:
             cmd += ' -- "%s"' % path
 
         stdout, stderr = self.run_git_command(cmd)
         # If we used 'show' command, strip first few lines (until actual diff
         # starts)
         if rev1 == self.EMPTY_CHANGESET:
             lines = stdout.splitlines()
             x = 0
             for line in lines:
                 if line.startswith('diff'):
                     break
                 x += 1
             # Append new line just like 'diff' command do
             stdout = '\n'.join(lines[x:]) + '\n'
         return stdout
 
     @LazyProperty
     def in_memory_changeset(self):
         """
         Returns ``GitInMemoryChangeset`` object for this repository.
         """
         return GitInMemoryChangeset(self)
 
     def clone(self, url, update_after_clone=True, bare=False):
         """
         Tries to clone changes from external location.
 
         :param update_after_clone: If set to ``False``, git won't checkout
           working directory
         :param bare: If set to ``True``, repository would be cloned into
           *bare* git repository (no working directory at all).
         """
         url = self._get_url(url)
         cmd = ['clone']
         if bare:
             cmd.append('--bare')
         elif not update_after_clone:
             cmd.append('--no-checkout')
         cmd += ['--', '"%s"' % url, '"%s"' % self.path]
         cmd = ' '.join(cmd)
         # If error occurs run_git_command raises RepositoryError already
         self.run_git_command(cmd)
 
     def pull(self, url):
         """
         Tries to pull changes from external location.
         """
         url = self._get_url(url)
         cmd = ['pull']
         cmd.append("--ff-only")
         cmd.append(url)
         cmd = ' '.join(cmd)
         # If error occurs run_git_command raises RepositoryError already
         self.run_git_command(cmd)
 
     def fetch(self, url):
         """
         Tries to pull changes from external location.
         """
         url = self._get_url(url)
         so, se = self.run_git_command('ls-remote -h %s' % url)
         refs = []
         for line in (x for x in so.splitlines()):
             sha, ref = line.split('\t')
             refs.append(ref)
         refs = ' '.join(('+%s:%s' % (r, r) for r in refs))
         cmd = '''fetch %s -- %s''' % (url, refs)
         self.run_git_command(cmd)
 
     @LazyProperty
     def workdir(self):
         """
         Returns ``Workdir`` instance for this repository.
         """
         return GitWorkdir(self)
 
     def get_config_value(self, section, name, config_file=None):
         """
         Returns configuration value for a given [``section``] and ``name``.
 
         :param section: Section we want to retrieve value from
         :param name: Name of configuration we want to retrieve
         :param config_file: A path to file which should be used to retrieve
           configuration from (might also be a list of file paths)
         """
         if config_file is None:
             config_file = []
         elif isinstance(config_file, basestring):
             config_file = [config_file]
 
         def gen_configs():
             for path in config_file + self._config_files:
                 try:
                     yield ConfigFile.from_path(path)
                 except (IOError, OSError, ValueError):
                     continue
 
         for config in gen_configs():
             try:
                 return config.get(section, name)
             except KeyError:
                 continue
         return None
 
     def get_user_name(self, config_file=None):
         """
         Returns user's name from global configuration file.
 
         :param config_file: A path to file which should be used to retrieve
           configuration from (might also be a list of file paths)
         """
         return self.get_config_value('user', 'name', config_file)
 
     def get_user_email(self, config_file=None):
         """
         Returns user's email from global configuration file.
 
         :param config_file: A path to file which should be used to retrieve
           configuration from (might also be a list of file paths)
         """
         return self.get_config_value('user', 'email', config_file)

rhodecode/lib/vcs/backends/hg/repository.py

@@ -1,571 +1,571 b''
 # -*- coding: utf-8 -*-
 """
     vcs.backends.hg.repository
     ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
     Mercurial repository implementation.
 
     :created_on: Apr 8, 2010
     :copyright: (c) 2010-2011 by Marcin Kuzminski, Lukasz Balcerzak.
 """
 
 import os
 import time
 import urllib
 import urllib2
 import logging
 import datetime
 
 
 from rhodecode.lib.vcs.backends.base import BaseRepository, CollectionGenerator
 from rhodecode.lib.vcs.conf import settings
 
 from rhodecode.lib.vcs.exceptions import (
     BranchDoesNotExistError, ChangesetDoesNotExistError, EmptyRepositoryError,
     RepositoryError, VCSError, TagAlreadyExistError, TagDoesNotExistError
 )
 from rhodecode.lib.vcs.utils import (
     author_email, author_name, date_fromtimestamp, makedate, safe_unicode
 )
 from rhodecode.lib.vcs.utils.lazy import LazyProperty
 from rhodecode.lib.vcs.utils.ordered_dict import OrderedDict
 from rhodecode.lib.vcs.utils.paths import abspath
 from rhodecode.lib.vcs.utils.hgcompat import (
     ui, nullid, match, patch, diffopts, clone, get_contact, pull,
     localrepository, RepoLookupError, Abort, RepoError, hex, scmutil, hg_url,
     httpbasicauthhandler, httpdigestauthhandler
 )
 
 from .changeset import MercurialChangeset
 from .inmemory import MercurialInMemoryChangeset
 from .workdir import MercurialWorkdir
 
 log = logging.getLogger(__name__)
 
 
 class MercurialRepository(BaseRepository):
     """
     Mercurial repository backend
     """
     DEFAULT_BRANCH_NAME = 'default'
     scm = 'hg'
 
     def __init__(self, repo_path, create=False, baseui=None, src_url=None,
                  update_after_clone=False):
         """
         Raises RepositoryError if repository could not be find at the given
         ``repo_path``.
 
         :param repo_path: local path of the repository
         :param create=False: if set to True, would try to create repository if
            it does not exist rather than raising exception
         :param baseui=None: user data
         :param src_url=None: would try to clone repository from given location
         :param update_after_clone=False: sets update of working copy after
           making a clone
         """
 
         if not isinstance(repo_path, str):
             raise VCSError('Mercurial backend requires repository path to '
                            'be instance of <str> got %s instead' %
                            type(repo_path))
 
         self.path = abspath(repo_path)
         self.baseui = baseui or ui.ui()
         # We've set path and ui, now we can set _repo itself
         self._repo = self._get_repo(create, src_url, update_after_clone)
 
     @property
     def _empty(self):
         """
-        Checks if repository is empty without any changesets
+        Checks if repository is empty ie. without any changesets
         """
         # TODO: Following raises errors when using InMemoryChangeset...
         # return len(self._repo.changelog) == 0
         return len(self.revisions) == 0
 
     @LazyProperty
     def revisions(self):
         """
         Returns list of revisions' ids, in ascending order.  Being lazy
         attribute allows external tools to inject shas from cache.
         """
         return self._get_all_revisions()
 
     @LazyProperty
     def name(self):
         return os.path.basename(self.path)
 
     @LazyProperty
     def branches(self):
         return self._get_branches()
 
     @LazyProperty
     def allbranches(self):
         """
         List all branches, including closed branches.
         """
         return self._get_branches(closed=True)
 
     def _get_branches(self, closed=False):
         """
         Get's branches for this repository
         Returns only not closed branches by default
 
         :param closed: return also closed branches for mercurial
         """
 
         if self._empty:
             return {}
 
         def _branchtags(localrepo):
             """
             Patched version of mercurial branchtags to not return the closed
             branches
 
             :param localrepo: locarepository instance
             """
 
             bt = {}
             bt_closed = {}
             for bn, heads in localrepo.branchmap().iteritems():
                 tip = heads[-1]
                 if 'close' in localrepo.changelog.read(tip)[5]:
                     bt_closed[bn] = tip
                 else:
                     bt[bn] = tip
 
             if closed:
                 bt.update(bt_closed)
             return bt
 
         sortkey = lambda ctx: ctx[0]  # sort by name
         _branches = [(safe_unicode(n), hex(h),) for n, h in
                      _branchtags(self._repo).items()]
 
         return OrderedDict(sorted(_branches, key=sortkey, reverse=False))
 
     @LazyProperty
     def tags(self):
         """
         Get's tags for this repository
         """
         return self._get_tags()
 
     def _get_tags(self):
         if self._empty:
             return {}
 
         sortkey = lambda ctx: ctx[0]  # sort by name
         _tags = [(safe_unicode(n), hex(h),) for n, h in
                  self._repo.tags().items()]
 
         return OrderedDict(sorted(_tags, key=sortkey, reverse=True))
 
     def tag(self, name, user, revision=None, message=None, date=None,
             **kwargs):
         """
         Creates and returns a tag for the given ``revision``.
 
         :param name: name for new tag
         :param user: full username, i.e.: "Joe Doe <[e-mail]>"
         :param revision: changeset id for which new tag would be created
         :param message: message of the tag's commit
         :param date: date of tag's commit
 
         :raises TagAlreadyExistError: if tag with same name already exists
         """
         if name in self.tags:
             raise TagAlreadyExistError("Tag %s already exists" % name)
         changeset = self.get_changeset(revision)
         local = kwargs.setdefault('local', False)
 
         if message is None:
             message = "Added tag %s for changeset %s" % (name,
                 changeset.short_id)
 
         if date is None:
             date = datetime.datetime.now().ctime()
 
         try:
             self._repo.tag(name, changeset._ctx.node(), message, local, user,
                 date)
         except Abort, e:
             raise RepositoryError(e.message)
 
         # Reinitialize tags
         self.tags = self._get_tags()
         tag_id = self.tags[name]
 
         return self.get_changeset(revision=tag_id)
 
     def remove_tag(self, name, user, message=None, date=None):
         """
         Removes tag with the given ``name``.
 
         :param name: name of the tag to be removed
         :param user: full username, i.e.: "Joe Doe <[e-mail]>"
         :param message: message of the tag's removal commit
         :param date: date of tag's removal commit
 
         :raises TagDoesNotExistError: if tag with given name does not exists
         """
         if name not in self.tags:
             raise TagDoesNotExistError("Tag %s does not exist" % name)
         if message is None:
             message = "Removed tag %s" % name
         if date is None:
             date = datetime.datetime.now().ctime()
         local = False
 
         try:
             self._repo.tag(name, nullid, message, local, user, date)
             self.tags = self._get_tags()
         except Abort, e:
             raise RepositoryError(e.message)
 
     @LazyProperty
     def bookmarks(self):
         """
         Get's bookmarks for this repository
         """
         return self._get_bookmarks()
 
     def _get_bookmarks(self):
         if self._empty:
             return {}
 
         sortkey = lambda ctx: ctx[0]  # sort by name
         _bookmarks = [(safe_unicode(n), hex(h),) for n, h in
                  self._repo._bookmarks.items()]
         return OrderedDict(sorted(_bookmarks, key=sortkey, reverse=True))
 
     def _get_all_revisions(self):
 
         return map(lambda x: hex(x[7]), self._repo.changelog.index)[:-1]
 
     def get_diff(self, rev1, rev2, path='', ignore_whitespace=False,
                   context=3):
         """
         Returns (git like) *diff*, as plain text. Shows changes introduced by
         ``rev2`` since ``rev1``.
 
         :param rev1: Entry point from which diff is shown. Can be
           ``self.EMPTY_CHANGESET`` - in this case, patch showing all
           the changes since empty state of the repository until ``rev2``
         :param rev2: Until which revision changes should be shown.
         :param ignore_whitespace: If set to ``True``, would not show whitespace
           changes. Defaults to ``False``.
         :param context: How many lines before/after changed lines should be
           shown. Defaults to ``3``.
         """
         if hasattr(rev1, 'raw_id'):
             rev1 = getattr(rev1, 'raw_id')
 
         if hasattr(rev2, 'raw_id'):
             rev2 = getattr(rev2, 'raw_id')
 
         # Check if given revisions are present at repository (may raise
         # ChangesetDoesNotExistError)
         if rev1 != self.EMPTY_CHANGESET:
             self.get_changeset(rev1)
         self.get_changeset(rev2)
         if path:
             file_filter = match(self.path, '', [path])
         else:
             file_filter = None
 
         return ''.join(patch.diff(self._repo, rev1, rev2, match=file_filter,
                           opts=diffopts(git=True,
                                         ignorews=ignore_whitespace,
                                         context=context)))
 
     @classmethod
     def _check_url(cls, url):
         """
         Function will check given url and try to verify if it's a valid
         link. Sometimes it may happened that mercurial will issue basic
         auth request that can cause whole API to hang when used from python
         or other external calls.
 
         On failures it'll raise urllib2.HTTPError, return code 200 if url
         is valid or True if it's a local path
         """
 
         # check first if it's not an local url
         if os.path.isdir(url) or url.startswith('file:'):
             return True
 
         if('+' in url[:url.find('://')]):
             url = url[url.find('+') + 1:]
 
         handlers = []
         test_uri, authinfo = hg_url(url).authinfo()
 
         if authinfo:
             #create a password manager
             passmgr = urllib2.HTTPPasswordMgrWithDefaultRealm()
             passmgr.add_password(*authinfo)
 
             handlers.extend((httpbasicauthhandler(passmgr),
                              httpdigestauthhandler(passmgr)))
 
         o = urllib2.build_opener(*handlers)
         o.addheaders = [('Content-Type', 'application/mercurial-0.1'),
                         ('Accept', 'application/mercurial-0.1')]
 
         q = {"cmd": 'between'}
         q.update({'pairs': "%s-%s" % ('0' * 40, '0' * 40)})
         qs = '?%s' % urllib.urlencode(q)
         cu = "%s%s" % (test_uri, qs)
         req = urllib2.Request(cu, None, {})
 
         try:
             resp = o.open(req)
             return resp.code == 200
         except Exception, e:
             # means it cannot be cloned
             raise urllib2.URLError("[%s] %s" % (url, e))
 
     def _get_repo(self, create, src_url=None, update_after_clone=False):
         """
         Function will check for mercurial repository in given path and return
         a localrepo object. If there is no repository in that path it will
         raise an exception unless ``create`` parameter is set to True - in
         that case repository would be created and returned.
         If ``src_url`` is given, would try to clone repository from the
         location at given clone_point. Additionally it'll make update to
         working copy accordingly to ``update_after_clone`` flag
         """
 
         try:
             if src_url:
                 url = str(self._get_url(src_url))
                 opts = {}
                 if not update_after_clone:
                     opts.update({'noupdate': True})
                 try:
                     MercurialRepository._check_url(url)
                     clone(self.baseui, url, self.path, **opts)
 #                except urllib2.URLError:
 #                    raise Abort("Got HTTP 404 error")
                 except Exception:
                     raise
 
                 # Don't try to create if we've already cloned repo
                 create = False
             return localrepository(self.baseui, self.path, create=create)
         except (Abort, RepoError), err:
             if create:
                 msg = "Cannot create repository at %s. Original error was %s"\
                     % (self.path, err)
             else:
                 msg = "Not valid repository at %s. Original error was %s"\
                     % (self.path, err)
             raise RepositoryError(msg)
 
     @LazyProperty
     def in_memory_changeset(self):
         return MercurialInMemoryChangeset(self)
 
     @LazyProperty
     def description(self):
         undefined_description = u'unknown'
         return safe_unicode(self._repo.ui.config('web', 'description',
                                    undefined_description, untrusted=True))
 
     @LazyProperty
     def contact(self):
         undefined_contact = u'Unknown'
         return safe_unicode(get_contact(self._repo.ui.config)
                             or undefined_contact)
 
     @LazyProperty
     def last_change(self):
         """
         Returns last change made on this repository as datetime object
         """
         return date_fromtimestamp(self._get_mtime(), makedate()[1])
 
     def _get_mtime(self):
         try:
             return time.mktime(self.get_changeset().date.timetuple())
         except RepositoryError:
             #fallback to filesystem
             cl_path = os.path.join(self.path, '.hg', "00changelog.i")
             st_path = os.path.join(self.path, '.hg', "store")
             if os.path.exists(cl_path):
                 return os.stat(cl_path).st_mtime
             else:
                 return os.stat(st_path).st_mtime
 
     def _get_hidden(self):
         return self._repo.ui.configbool("web", "hidden", untrusted=True)
 
     def _get_revision(self, revision):
         """
         Get's an ID revision given as str. This will always return a fill
         40 char revision number
 
         :param revision: str or int or None
         """
 
         if self._empty:
             raise EmptyRepositoryError("There are no changesets yet")
 
         if revision in [-1, 'tip', None]:
             revision = 'tip'
 
         try:
             revision = hex(self._repo.lookup(revision))
         except (IndexError, ValueError, RepoLookupError, TypeError):
             raise ChangesetDoesNotExistError("Revision %s does not "
                                     "exist for this repository"
                                     % (revision))
         return revision
 
     def _get_archives(self, archive_name='tip'):
         allowed = self.baseui.configlist("web", "allow_archive",
                                          untrusted=True)
         for i in [('zip', '.zip'), ('gz', '.tar.gz'), ('bz2', '.tar.bz2')]:
             if i[0] in allowed or self._repo.ui.configbool("web",
                                                            "allow" + i[0],
                                                            untrusted=True):
                 yield {"type": i[0], "extension": i[1], "node": archive_name}
 
     def _get_url(self, url):
         """
         Returns normalized url. If schema is not given, would fall
         to filesystem
         (``file:///``) schema.
         """
         url = str(url)
         if url != 'default' and not '://' in url:
             url = "file:" + urllib.pathname2url(url)
         return url
 
     def get_hook_location(self):
         """
         returns absolute path to location where hooks are stored
         """
         return os.path.join(self.path, '.hg', '.hgrc')
 
     def get_changeset(self, revision=None):
         """
         Returns ``MercurialChangeset`` object representing repository's
         changeset at the given ``revision``.
         """
         revision = self._get_revision(revision)
         changeset = MercurialChangeset(repository=self, revision=revision)
         return changeset
 
     def get_changesets(self, start=None, end=None, start_date=None,
                        end_date=None, branch_name=None, reverse=False):
         """
         Returns iterator of ``MercurialChangeset`` objects from start to end
         (both are inclusive)
 
         :param start: None, str, int or mercurial lookup format
         :param end:  None, str, int or mercurial lookup format
         :param start_date:
         :param end_date:
         :param branch_name:
         :param reversed: return changesets in reversed order
         """
 
         start_raw_id = self._get_revision(start)
         start_pos = self.revisions.index(start_raw_id) if start else None
         end_raw_id = self._get_revision(end)
         end_pos = self.revisions.index(end_raw_id) if end else None
 
         if None not in [start, end] and start_pos > end_pos:
             raise RepositoryError("Start revision '%s' cannot be "
                                   "after end revision '%s'" % (start, end))
 
         if branch_name and branch_name not in self.allbranches.keys():
             raise BranchDoesNotExistError('Branch %s not found in'
                                   ' this repository' % branch_name)
         if end_pos is not None:
             end_pos += 1
         #filter branches
         filter_ = []
         if branch_name:
             filter_.append('branch("%s")' % (branch_name))
 
         if start_date and not end_date:
             filter_.append('date(">%s")' % start_date)
         if end_date and not start_date:
             filter_.append('date("<%s")' % end_date)
         if start_date and end_date:
             filter_.append('date(">%s") and date("<%s")' % (start_date, end_date))
         if filter_:
             revisions = scmutil.revrange(self._repo, filter_)
         else:
             revisions = self.revisions
 
         revs = revisions[start_pos:end_pos]
         if reverse:
             revs = reversed(revs)
 
         return CollectionGenerator(self, revs)
 
     def pull(self, url):
         """
         Tries to pull changes from external location.
         """
         url = self._get_url(url)
         try:
             pull(self.baseui, self._repo, url)
         except Abort, err:
             # Propagate error but with vcs's type
             raise RepositoryError(str(err))
 
     @LazyProperty
     def workdir(self):
         """
         Returns ``Workdir`` instance for this repository.
         """
         return MercurialWorkdir(self)
 
     def get_config_value(self, section, name=None, config_file=None):
         """
         Returns configuration value for a given [``section``] and ``name``.
 
         :param section: Section we want to retrieve value from
         :param name: Name of configuration we want to retrieve
         :param config_file: A path to file which should be used to retrieve
           configuration from (might also be a list of file paths)
         """
         if config_file is None:
             config_file = []
         elif isinstance(config_file, basestring):
             config_file = [config_file]
 
         config = self._repo.ui
         for path in config_file:
             config.readconfig(path)
         return config.config(section, name)
 
     def get_user_name(self, config_file=None):
         """
         Returns user's name from global configuration file.
 
         :param config_file: A path to file which should be used to retrieve
           configuration from (might also be a list of file paths)
         """
         username = self.get_config_value('ui', 'username')
         if username:
             return author_name(username)
         return None
 
     def get_user_email(self, config_file=None):
         """
         Returns user's email from global configuration file.
 
         :param config_file: A path to file which should be used to retrieve
           configuration from (might also be a list of file paths)
         """
         username = self.get_config_value('ui', 'username')
         if username:
             return author_email(username)
         return None

rhodecode/tests/vcs/test_changesets.py

@@ -1,360 +1,370 b''
 from __future__ import with_statement
 
+import time
 import datetime
 from rhodecode.lib import vcs
 from rhodecode.tests.vcs.base import BackendTestMixin
 from rhodecode.tests.vcs.conf import SCM_TESTS
 
 from rhodecode.lib.vcs.backends.base import BaseChangeset
 from rhodecode.lib.vcs.nodes import (
     FileNode, AddedFileNodesGenerator,
     ChangedFileNodesGenerator, RemovedFileNodesGenerator
 )
 from rhodecode.lib.vcs.exceptions import (
     BranchDoesNotExistError, ChangesetDoesNotExistError,
-    RepositoryError
+    RepositoryError, EmptyRepositoryError
 )
 from rhodecode.lib.vcs.utils.compat import unittest
+from rhodecode.tests.vcs.conf import get_new_dir
 
 
 class TestBaseChangeset(unittest.TestCase):
 
     def test_as_dict(self):
         changeset = BaseChangeset()
         changeset.id = 'ID'
         changeset.raw_id = 'RAW_ID'
         changeset.short_id = 'SHORT_ID'
         changeset.revision = 1009
         changeset.date = datetime.datetime(2011, 1, 30, 1, 45)
         changeset.message = 'Message of a commit'
         changeset.author = 'Joe Doe <[e-mail]>'
         changeset.added = [FileNode('foo/bar/baz'), FileNode('foobar')]
         changeset.changed = []
         changeset.removed = []
         self.assertEqual(changeset.as_dict(), {
             'id': 'ID',
             'raw_id': 'RAW_ID',
             'short_id': 'SHORT_ID',
             'revision': 1009,
             'date': datetime.datetime(2011, 1, 30, 1, 45),
             'message': 'Message of a commit',
             'author': {
                 'name': 'Joe Doe',
                 'email': '[e-mail]',
             },
             'added': ['foo/bar/baz', 'foobar'],
             'changed': [],
             'removed': [],
         })
 
 class ChangesetsWithCommitsTestCaseixin(BackendTestMixin):
     recreate_repo_per_test = True
 
     @classmethod
     def _get_commits(cls):
         start_date = datetime.datetime(2010, 1, 1, 20)
         for x in xrange(5):
             yield {
                 'message': 'Commit %d' % x,
                 'author': 'Joe Doe <[e-mail]>',
                 'date': start_date + datetime.timedelta(hours=12 * x),
                 'added': [
                     FileNode('file_%d.txt' % x, content='Foobar %d' % x),
                 ],
             }
 
     def test_new_branch(self):
         self.imc.add(vcs.nodes.FileNode('docs/index.txt',
             content='Documentation\n'))
         foobar_tip = self.imc.commit(
             message=u'New branch: foobar',
             author=u'joe',
             branch='foobar',
         )
         self.assertTrue('foobar' in self.repo.branches)
         self.assertEqual(foobar_tip.branch, 'foobar')
         # 'foobar' should be the only branch that contains the new commit
         self.assertNotEqual(*self.repo.branches.values())
 
     def test_new_head_in_default_branch(self):
         tip = self.repo.get_changeset()
         self.imc.add(vcs.nodes.FileNode('docs/index.txt',
             content='Documentation\n'))
         foobar_tip = self.imc.commit(
             message=u'New branch: foobar',
             author=u'joe',
             branch='foobar',
             parents=[tip],
         )
         self.imc.change(vcs.nodes.FileNode('docs/index.txt',
             content='Documentation\nand more...\n'))
         newtip = self.imc.commit(
             message=u'At default branch',
             author=u'joe',
             branch=foobar_tip.branch,
             parents=[foobar_tip],
         )
 
         newest_tip = self.imc.commit(
             message=u'Merged with %s' % foobar_tip.raw_id,
             author=u'joe',
             branch=self.backend_class.DEFAULT_BRANCH_NAME,
             parents=[newtip, foobar_tip],
         )
 
         self.assertEqual(newest_tip.branch,
             self.backend_class.DEFAULT_BRANCH_NAME)
 
     def test_get_changesets_respects_branch_name(self):
         tip = self.repo.get_changeset()
         self.imc.add(vcs.nodes.FileNode('docs/index.txt',
             content='Documentation\n'))
         doc_changeset = self.imc.commit(
             message=u'New branch: docs',
             author=u'joe',
             branch='docs',
         )
         self.imc.add(vcs.nodes.FileNode('newfile', content=''))
         self.imc.commit(
             message=u'Back in default branch',
             author=u'joe',
             parents=[tip],
         )
         default_branch_changesets = self.repo.get_changesets(
             branch_name=self.repo.DEFAULT_BRANCH_NAME)
         self.assertNotIn(doc_changeset, default_branch_changesets)
 
     def test_get_changeset_by_branch(self):
         for branch, sha in self.repo.branches.iteritems():
             self.assertEqual(sha, self.repo.get_changeset(branch).raw_id)
 
     def test_get_changeset_by_tag(self):
         for tag, sha in self.repo.tags.iteritems():
             self.assertEqual(sha, self.repo.get_changeset(tag).raw_id)
 
 
 class ChangesetsTestCaseMixin(BackendTestMixin):
     recreate_repo_per_test = False
 
     @classmethod
     def _get_commits(cls):
         start_date = datetime.datetime(2010, 1, 1, 20)
         for x in xrange(5):
             yield {
                 'message': u'Commit %d' % x,
                 'author': u'Joe Doe <[e-mail]>',
                 'date': start_date + datetime.timedelta(hours=12 * x),
                 'added': [
                     FileNode('file_%d.txt' % x, content='Foobar %d' % x),
                 ],
             }
 
     def test_simple(self):
         tip = self.repo.get_changeset()
         self.assertEqual(tip.date, datetime.datetime(2010, 1, 3, 20))
 
     def test_get_changesets_is_ordered_by_date(self):
         changesets = list(self.repo.get_changesets())
         ordered_by_date = sorted(changesets,
             key=lambda cs: cs.date)
         self.assertItemsEqual(changesets, ordered_by_date)
 
     def test_get_changesets_respects_start(self):
         second_id = self.repo.revisions[1]
         changesets = list(self.repo.get_changesets(start=second_id))
         self.assertEqual(len(changesets), 4)
 
     def test_get_changesets_numerical_id_respects_start(self):
         second_id = 1
         changesets = list(self.repo.get_changesets(start=second_id))
         self.assertEqual(len(changesets), 4)
 
     def test_get_changesets_includes_start_changeset(self):
         second_id = self.repo.revisions[1]
         changesets = list(self.repo.get_changesets(start=second_id))
         self.assertEqual(changesets[0].raw_id, second_id)
 
     def test_get_changesets_respects_end(self):
         second_id = self.repo.revisions[1]
         changesets = list(self.repo.get_changesets(end=second_id))
         self.assertEqual(changesets[-1].raw_id, second_id)
         self.assertEqual(len(changesets), 2)
 
     def test_get_changesets_numerical_id_respects_end(self):
         second_id = 1
         changesets = list(self.repo.get_changesets(end=second_id))
         self.assertEqual(changesets.index(changesets[-1]), second_id)
         self.assertEqual(len(changesets), 2)
 
     def test_get_changesets_respects_both_start_and_end(self):
         second_id = self.repo.revisions[1]
         third_id = self.repo.revisions[2]
         changesets = list(self.repo.get_changesets(start=second_id,
             end=third_id))
         self.assertEqual(len(changesets), 2)
 
     def test_get_changesets_numerical_id_respects_both_start_and_end(self):
         changesets = list(self.repo.get_changesets(start=2, end=3))
         self.assertEqual(len(changesets), 2)
 
+    def test_get_changesets_on_empty_repo_raises_EmptyRepository_error(self):
+        Backend = self.get_backend()
+        repo_path = get_new_dir(str(time.time()))
+        repo = Backend(repo_path, create=True)
+
+        with self.assertRaises(EmptyRepositoryError):
+            list(repo.get_changesets(start='foobar'))
+
     def test_get_changesets_includes_end_changeset(self):
         second_id = self.repo.revisions[1]
         changesets = list(self.repo.get_changesets(end=second_id))
         self.assertEqual(changesets[-1].raw_id, second_id)
 
     def test_get_changesets_respects_start_date(self):
         start_date = datetime.datetime(2010, 2, 1)
         for cs in self.repo.get_changesets(start_date=start_date):
             self.assertGreaterEqual(cs.date, start_date)
 
     def test_get_changesets_respects_end_date(self):
         start_date = datetime.datetime(2010, 1, 1)
         end_date = datetime.datetime(2010, 2, 1)
         for cs in self.repo.get_changesets(start_date=start_date,
                                            end_date=end_date):
             self.assertGreaterEqual(cs.date, start_date)
             self.assertLessEqual(cs.date, end_date)
 
     def test_get_changesets_respects_start_date_and_end_date(self):
         end_date = datetime.datetime(2010, 2, 1)
         for cs in self.repo.get_changesets(end_date=end_date):
             self.assertLessEqual(cs.date, end_date)
 
     def test_get_changesets_respects_reverse(self):
         changesets_id_list = [cs.raw_id for cs in
             self.repo.get_changesets(reverse=True)]
         self.assertItemsEqual(changesets_id_list, reversed(self.repo.revisions))
 
     def test_get_filenodes_generator(self):
         tip = self.repo.get_changeset()
         filepaths = [node.path for node in tip.get_filenodes_generator()]
         self.assertItemsEqual(filepaths, ['file_%d.txt' % x for x in xrange(5)])
 
     def test_size(self):
         tip = self.repo.get_changeset()
         size = 5 * len('Foobar N') # Size of 5 files
         self.assertEqual(tip.size, size)
 
     def test_author(self):
         tip = self.repo.get_changeset()
         self.assertEqual(tip.author, u'Joe Doe <[e-mail]>')
 
     def test_author_name(self):
         tip = self.repo.get_changeset()
         self.assertEqual(tip.author_name, u'Joe Doe')
 
     def test_author_email(self):
         tip = self.repo.get_changeset()
         self.assertEqual(tip.author_email, u'[e-mail]')
 
     def test_get_changesets_raise_changesetdoesnotexist_for_wrong_start(self):
         with self.assertRaises(ChangesetDoesNotExistError):
             list(self.repo.get_changesets(start='foobar'))
 
     def test_get_changesets_raise_changesetdoesnotexist_for_wrong_end(self):
         with self.assertRaises(ChangesetDoesNotExistError):
             list(self.repo.get_changesets(end='foobar'))
 
     def test_get_changesets_raise_branchdoesnotexist_for_wrong_branch_name(self):
         with self.assertRaises(BranchDoesNotExistError):
             list(self.repo.get_changesets(branch_name='foobar'))
 
     def test_get_changesets_raise_repositoryerror_for_wrong_start_end(self):
         start = self.repo.revisions[-1]
         end = self.repo.revisions[0]
         with self.assertRaises(RepositoryError):
             list(self.repo.get_changesets(start=start, end=end))
 
     def test_get_changesets_numerical_id_reversed(self):
         with self.assertRaises(RepositoryError):
             [x for x in self.repo.get_changesets(start=3, end=2)]
 
     def test_get_changesets_numerical_id_respects_both_start_and_end_last(self):
         with self.assertRaises(RepositoryError):
             last = len(self.repo.revisions)
             list(self.repo.get_changesets(start=last-1, end=last-2))
 
     def test_get_changesets_numerical_id_last_zero_error(self):
         with self.assertRaises(RepositoryError):
             last = len(self.repo.revisions)
             list(self.repo.get_changesets(start=last-1, end=0))
 
 
 class ChangesetsChangesTestCaseMixin(BackendTestMixin):
     recreate_repo_per_test = False
 
     @classmethod
     def _get_commits(cls):
         return [
             {
                 'message': u'Initial',
                 'author': u'Joe Doe <[e-mail]>',
                 'date': datetime.datetime(2010, 1, 1, 20),
                 'added': [
                     FileNode('foo/bar', content='foo'),
                     FileNode('foobar', content='foo'),
                     FileNode('qwe', content='foo'),
                 ],
             },
             {
                 'message': u'Massive changes',
                 'author': u'Joe Doe <[e-mail]>',
                 'date': datetime.datetime(2010, 1, 1, 22),
                 'added': [FileNode('fallout', content='War never changes')],
                 'changed': [
                     FileNode('foo/bar', content='baz'),
                     FileNode('foobar', content='baz'),
                 ],
                 'removed': [FileNode('qwe')],
             },
         ]
 
     def test_initial_commit(self):
         changeset = self.repo.get_changeset(0)
         self.assertItemsEqual(changeset.added, [
             changeset.get_node('foo/bar'),
             changeset.get_node('foobar'),
             changeset.get_node('qwe'),
         ])
         self.assertItemsEqual(changeset.changed, [])
         self.assertItemsEqual(changeset.removed, [])
 
     def test_head_added(self):
         changeset = self.repo.get_changeset()
         self.assertTrue(isinstance(changeset.added, AddedFileNodesGenerator))
         self.assertItemsEqual(changeset.added, [
             changeset.get_node('fallout'),
         ])
         self.assertTrue(isinstance(changeset.changed, ChangedFileNodesGenerator))
         self.assertItemsEqual(changeset.changed, [
             changeset.get_node('foo/bar'),
             changeset.get_node('foobar'),
         ])
         self.assertTrue(isinstance(changeset.removed, RemovedFileNodesGenerator))
         self.assertEqual(len(changeset.removed), 1)
         self.assertEqual(list(changeset.removed)[0].path, 'qwe')
 
 
 # For each backend create test case class
 for alias in SCM_TESTS:
     attrs = {
         'backend_alias': alias,
     }
     # tests with additional commits
     cls_name = ''.join(('%s changesets with commits test' % alias).title().split())
     bases = (ChangesetsWithCommitsTestCaseixin, unittest.TestCase)
     globals()[cls_name] = type(cls_name, bases, attrs)
 
     # tests without additional commits
     cls_name = ''.join(('%s changesets test' % alias).title().split())
     bases = (ChangesetsTestCaseMixin, unittest.TestCase)
     globals()[cls_name] = type(cls_name, bases, attrs)
 
     # tests changes
     cls_name = ''.join(('%s changesets changes test' % alias).title().split())
     bases = (ChangesetsChangesTestCaseMixin, unittest.TestCase)
     globals()[cls_name] = type(cls_name, bases, attrs)
 
 
 if __name__ == '__main__':
     unittest.main()