import os
import stat
import errno
import string
import mimetypes
import logging
from hashlib import sha1
from datetime import datetime
from collections import defaultdict
import pylons
from tg import config
import pymongo.bson
from ming import schema as S
from ming.base import Object
from ming.utils import LazyProperty
from ming.orm import MappedClass, FieldProperty, session, mapper
from allura.lib.patience import SequenceMatcher
from allura.lib import helpers as h
from .artifact import Artifact
from .auth import User
from .session import repository_orm_session, project_orm_session
log = logging.getLogger(__name__)
class RepositoryImplementation(object):
# Repository-specific code
def init(self):
raise NotImplementedError, 'init'
def clone_from(self, source_path):
raise NotImplementedError, 'clone_from'
def commit(self, revision):
raise NotImplementedError, 'commit'
def new_commits(self, all_commits=False):
'''Return any commit object_ids in the native repo that are not (yet) stored
in the database in topological order (parents first)'''
raise NotImplementedError, 'commit'
def commit_context(self, object_id):
'''Returns {'prev':Commit, 'next':Commit}'''
raise NotImplementedError, 'context'
def refresh_heads(self):
'''Sets repository metadata such as heads, tags, and branches'''
raise NotImplementedError, 'refresh_heads'
def refresh_commit(self, ci, seen_object_ids):
'''Refresh the data in the commit object 'ci' with data from the repo'''
raise NotImplementedError, 'refresh_heads'
def _setup_receive_hook(self):
'''Install a hook in the repository that will ping the refresh url for
the repo'''
raise NotImplementedError, '_setup_receive_hook'
def log(self, object_id, skip, count):
'''Return a list of object_ids beginning at the given commit ID and continuing
to the parent nodes in a breadth-first traversal. Also return a list of 'next commit' options
(these are candidates for he next commit after 'count' commits have been
exhausted).'''
raise NotImplementedError, '_log'
def open_blob(self, blob):
'''Return a file-like object that contains the contents of the blob'''
raise NotImplementedError, 'open_blob'
def shorthand_for_commit(self, commit):
return '[%s]' % commit.object_id[:6]
def url_for_commit(self, commit):
return '%sci/%s/' % (self._repo.url(), commit.object_id)
def _setup_paths(self, create_repo_dir=True):
if not self._repo.fs_path.endswith('/'): self._repo.fs_path += '/'
fullname = os.path.join(self._repo.fs_path, self._repo.name)
try:
os.makedirs(fullname if create_repo_dir else self._repo.fs_path)
except OSError, e: # pragma no cover
if e.errno != errno.EEXIST: raise
return fullname
def _setup_special_files(self):
magic_file = os.path.join(self._repo.fs_path, self._repo.name, '.SOURCEFORGE-REPOSITORY')
with open(magic_file, 'w') as f:
f.write(self._repo.repo_id)
os.chmod(magic_file, stat.S_IRUSR|stat.S_IRGRP|stat.S_IROTH)
self._setup_receive_hook()
class Repository(Artifact):
BATCH_SIZE=100
class __mongometa__:
name='generic-repository'
_impl = None
repo_id='repo'
type_s='Repository'
name=FieldProperty(str)
tool=FieldProperty(str)
fs_path=FieldProperty(str)
url_path=FieldProperty(str)
status=FieldProperty(str)
email_address=''
additional_viewable_extensions=FieldProperty(str)
heads = FieldProperty([dict(name=str,object_id=str, count=int)])
branches = FieldProperty([dict(name=str,object_id=str, count=int)])
repo_tags = FieldProperty([dict(name=str,object_id=str, count=int)])
upstream_repo = FieldProperty(dict(name=str,url=str))
def __init__(self, **kw):
if 'name' in kw and 'tool' in kw:
if 'fs_path' not in kw:
kw['fs_path'] = '/' + os.path.join(
kw['tool'],
pylons.c.project.url()[1:])
if 'url_path' not in kw:
kw['url_path'] = pylons.c.project.url()
super(Repository, self).__init__(**kw)
def __repr__(self):
return '<%s %s>' % (
self.__class__.__name__,
self.full_fs_path)
# Proxy to _impl
def init(self):
return self._impl.init()
def commit(self, rev):
return self._impl.commit(rev)
def commit_context(self, commit):
return self._impl.commit_context(commit)
def open_blob(self, blob):
return self._impl.open_blob(blob)
def shorthand_for_commit(self, commit):
return self._impl.shorthand_for_commit(commit)
def url_for_commit(self, commit):
return self._impl.url_for_commit(commit)
def _log(self, rev, skip, max_count):
ci = self.commit(rev)
if ci is None: return []
return ci.log(int(skip), int(max_count))
def init_as_clone(self, source_path, source_name, source_url):
self.upstream_repo.name = source_name
self.upstream_repo.url = source_url
session(self).flush(self)
self._impl.clone_from(source_path)
def log(self, branch='master', offset=0, limit=10):
return list(self._log(rev=branch, skip=offset, max_count=limit))
def count(self, branch='master'):
try:
ci = self.commit(branch)
if ci is None: return 0
return ci.count_revisions()
except:
log.exception('Error getting repo count')
return 0
def latest(self, branch='master'):
if self._impl is None: return None
try:
return self.commit(branch)
except:
return None
def url(self):
return self.app_config.url()
def shorthand_id(self):
return self.name
def index(self):
result = Artifact.index(self)
result.update(
name_s=self.name,
type_s=self.type_s)
return result
@property
def full_fs_path(self):
return os.path.join(self.fs_path, self.name)
def scm_host(self):
return self.tool + config.get('scm.host', '.' + pylons.request.host)
@property
def scm_url_path(self):
return self.scm_host() + self.url_path + self.name
@LazyProperty
def _additional_viewable_extensions(self):
ext_list = self.additional_viewable_extensions or ''
ext_list = [ext.strip() for ext in ext_list.split(',') if ext]
ext_list += [ '.ini', '.gitignore', '.svnignore', 'README' ]
return ext_list
def guess_type(self, name):
'''Guess the mime type and encoding of a given filename'''
content_type, encoding = mimetypes.guess_type(name)
if content_type is None or not content_type.startswith('text/'):
fn, ext = os.path.splitext(name)
ext = ext or fn
if ext in self._additional_viewable_extensions:
content_type, encoding = 'text/plain', None
if content_type is None:
content_type, encoding = 'application/octet-stream', None
return content_type, encoding
def refresh(self, all_commits=False):
'''Find any new commits in the repository and update'''
self._impl.refresh_heads()
self.status = 'analyzing'
session(self).flush()
sess = session(Commit)
log.info('Refreshing repository %s', self)
commit_ids = self._impl.new_commits(all_commits)
log.info('... %d new commits', len(commit_ids))
# Refresh history
i=0
seen_object_ids = set()
for i, oid in enumerate(commit_ids):
if len(seen_object_ids) > 10000:
log.info('... flushing seen object cache')
seen_object_ids = set()
ci, isnew = Commit.upsert(oid)
if self._id not in ci.repositories:
# update the commit's repo list
ci.query.update(
dict(_id=ci._id),
{'$push':dict(repositories=self._id)})
if not isnew and not all_commits:
# race condition, let the other proc handle it
sess.expunge(ci)
continue
ci.respositories = [ self._id ]
ci.set_context(self)
self._impl.refresh_commit(ci, seen_object_ids)
if (i+1) % self.BATCH_SIZE == 0:
log.info('...... flushing %d commits (%d total)',
self.BATCH_SIZE, (i+1))
sess.flush()
sess.clear()
log.info('...... flushing %d commits (%d total)',
i % self.BATCH_SIZE, i)
sess.flush()
sess.clear()
self.compute_diffs(commit_ids)
for head in self.heads + self.branches + self.tags:
ci = self.commit(head.object_id)
if ci is not None:
head.count = ci.count_revisions()
session(self).flush()
return len(commit_ids)
def compute_diffs(self, commit_ids=None):
if commit_ids is None:
commit_ids = self._impl.new_commits(all_commits=True)
sess = session(Commit)
# Compute diffs on new commits
log.info('... computing diffs')
seen_objects = {}
i=0
for i, oid in enumerate(commit_ids):
ci = self._impl.commit(oid)
ci.tree.set_last_commit(ci, self)
ci.compute_diffs(seen_objects)
if (i+1) % self.BATCH_SIZE == 0:
seen_objects = {}
log.info('...... flushing %d commits (%d total)',
self.BATCH_SIZE, (i+1))
sess.flush()
sess.clear()
log.info('...... flushing %d commits (%d total)',
i % self.BATCH_SIZE, i)
sess.flush()
sess.clear()
log.info('... refreshed repository %s. Found %d new commits',
self, len(commit_ids))
self.status = 'ready'
class LastCommitFor(MappedClass):
class __mongometa__:
session = project_orm_session
name='last_commit_for'
unique_indexes = [ ('repo_id', 'object_id') ]
_id = FieldProperty(S.ObjectId)
repo_id = FieldProperty(S.ObjectId)
object_id = FieldProperty(str)
last_commit = FieldProperty(dict(
date=datetime,
author=str,
author_email=str,
author_url=str,
id=str,
href=str,
shortlink=str,
summary=str))
@classmethod
def upsert(cls, repo_id, object_id):
isnew = False
r = cls.query.get(repo_id=repo_id, object_id=object_id)
if r is not None: return r, isnew
try:
r = cls(repo_id=repo_id, object_id=object_id)
session(r).flush(r)
isnew = True
except pymongo.errors.DuplicateKeyError:
session(r).expunge(r)
r = cls.query.get(repo_id=repo_id, object_id=object_id)
return r, isnew
class RepoObject(MappedClass):
class __mongometa__:
session = repository_orm_session
name='repo_object'
polymorphic_on = 'type'
polymorphic_identity=None
indexes = [ 'parent_ids' ]
unique_indexes = [ 'object_id' ]
# ID Fields
_id = FieldProperty(S.ObjectId)
type = FieldProperty(str)
repo_id = FieldProperty(S.Deprecated)
object_id = FieldProperty(str)
last_commit=FieldProperty(S.Deprecated)
@classmethod
def upsert(cls, object_id):
isnew = False
r = cls.query.get(object_id=object_id)
if r is not None:
return r, isnew
try:
r = cls(
type=cls.__mongometa__.polymorphic_identity,
object_id=object_id)
session(r).flush(r)
isnew = True
except pymongo.errors.DuplicateKeyError:
session(r).expunge(r)
r = cls.query.get(object_id=object_id)
return r, isnew
def set_last_commit(self, ci, repo=None):
'''Update the last_commit_for object based on the passed in commit &
repo'''
if repo is None: repo = pylons.c.app.repo
lc, isnew = LastCommitFor.upsert(repo_id=repo._id, object_id=self.object_id)
if isnew:
lc.last_commit.author = ci.authored.name
lc.last_commit.author_email = ci.authored.email
lc.last_commit.author_url = ci.author_url
lc.last_commit.date = ci.authored.date
lc.last_commit.id = ci.object_id
lc.last_commit.href = ci.url()
lc.last_commit.shortlink = ci.shorthand_id()
lc.last_commit.summary = ci.summary
assert lc.last_commit.date
return lc, isnew
def get_last_commit(self, repo=None):
if repo is None: repo = pylons.c.app.repo
lc = LastCommitFor.query.get(
repo_id=repo._id, object_id=self.object_id)
if lc is None:
return dict(
author=None,
author_email=None,
author_url=None,
date=None,
id=None,
href=None,
shortlink=None,
summary=None)
return lc.last_commit
def __repr__(self):
return '<%s %s>' % (
self.__class__.__name__, self.object_id)
def index_id(self):
return repr(self)
def set_context(self, context):
'''Set ephemeral (unsaved) attributes based on a context object'''
raise NotImplementedError, 'set_context'
def primary(self): return self
class LogCache(RepoObject):
'''Class to store nothing but lists of commit IDs in topo sort order'''
class __mongometa__:
polymorphic_identity='log_cache'
type_s = 'LogCache'
type = FieldProperty(str, if_missing='log_cache')
object_ids = FieldProperty([str])
candidates = FieldProperty([str])
@classmethod
def get(cls, repo, object_id):
lc, new = cls.upsert('$' + object_id)
if not lc.object_ids:
lc.object_ids, lc.candidates = repo._impl.log(object_id, 0, 50)
return lc
class Commit(RepoObject):
class __mongometa__:
polymorphic_identity='commit'
type_s = 'Commit'
# File data
type = FieldProperty(str, if_missing='commit')
tree_id = FieldProperty(str)
diffs = FieldProperty(dict(
added=[str],
removed=[str],
changed=[str],
copied=[dict(old=str, new=str)]))
# Commit metadata
committed = FieldProperty(
dict(name=str,
email=str,
date=datetime))
authored = FieldProperty(
dict(name=str,
email=str,
date=datetime))
message = FieldProperty(str)
parent_ids = FieldProperty([str])
extra = FieldProperty([dict(name=str, value=str)])
# All repos that potentially reference this commit
repositories=FieldProperty([S.ObjectId])
def __init__(self, **kw):
super(Commit, self).__init__(**kw)
# Ephemeral attrs
self.repo = None
def set_context(self, repo):
self.repo = repo
@LazyProperty
def author_url(self):
u = User.by_email_address(self.authored.email)
if u: return u.url()
@LazyProperty
def committer_url(self):
u = User.by_email_address(self.committed.email)
if u: return u.url()
@LazyProperty
def tree(self):
t = Tree.query.get(object_id=self.tree_id)
t.set_context(self)
return t
@LazyProperty
def summary(self):
message = h.really_unicode(self.message)
first_line = message.split('\n')[0]
return h.text.truncate(first_line, 75)
def get_path(self, path):
'''Return the blob on the given path'''
if path.startswith('/'): path = path[1:]
path_parts = path.split('/')
return self.tree.get_blob(path_parts[-1], path_parts[:-1])
def shorthand_id(self):
return self.repo.shorthand_for_commit(self)
def url(self):
return self.repo.url_for_commit(self)
def dump_ref(self):
return CommitReference(
commit_class=self.__class__,
object_id=self.object_id)
def log(self, skip, count):
oids = list(self.log_iter(skip, count))
commits = self.query.find(dict(
type='commit',
object_id={'$in':oids}))
commits_by_oid = {}
for ci in commits:
ci.set_context(self.repo)
commits_by_oid[ci.object_id] = ci
return [ commits_by_oid[oid] for oid in oids ]
def log_iter(self, skip, count):
seen_oids = set()
candidates = [ self.object_id ]
while candidates and count:
candidate = candidates.pop()
if candidate in seen_oids: continue
lc = LogCache.get(self.repo, candidate)
oids = lc.object_ids
candidates += lc.candidates
for oid in oids:
if oid in seen_oids: continue
seen_oids.add(oid)
if count == 0:
break
elif skip == 0:
yield oid
count -= 1
else:
skip -= 1
def count_revisions(self):
seen_oids = set()
candidates = [ self.object_id ]
while candidates:
candidate = candidates.pop()
if candidate in seen_oids: continue
lc = LogCache.get(self.repo, candidate)
seen_oids.update(lc.object_ids)
candidates += lc.candidates
return len(seen_oids)
def compute_diffs(self, seen_objects):
self.diffs.added = []
self.diffs.removed = []
self.diffs.changed = []
self.diffs.copied = []
if self.parent_ids:
parent = self.repo.commit(self.parent_ids[0])
for diff in Tree.diff(parent.tree, self.tree, seen_objects):
if diff.is_new:
self.diffs.added.append(diff.b_path)
obj = RepoObject.query.get(object_id=diff.b_object_id)
obj.set_last_commit(self, self.repo)
elif diff.is_delete:
self.diffs.removed.append(diff.a_path)
elif diff.is_copy:
self.diffs.copied.append(dict(
old=diff.a_path, new=diff.b_path))
obj = RepoObject.query.get(object_id=diff.b_object_id)
obj.set_last_commit(self, self.repo)
else:
self.diffs.changed.append(diff.a_path)
obj = RepoObject.query.get(object_id=diff.b_object_id)
obj.set_last_commit(self, self.repo)
else:
# Parent-less, so the whole tree is additions
tree = self.tree
for oid, name in tree.object_ids.items():
self.diffs.added.append('/'+name)
obj = RepoObject.query.get(object_id=oid)
obj.set_last_commit(self, self.repo)
def context(self):
return self.repo.commit_context(self)
@classmethod
def unknown_commit_ids_in(cls, commit_ids):
commit_ids = list(commit_ids)
m = mapper(cls)
q = session(cls).impl.find(
m.doc_cls,
dict(
type='commit',
object_id={'$in':commit_ids},
),
['object_id'])
known_commits = set(obj.object_id for obj in q)
return [ cid for cid in commit_ids if cid not in known_commits ]
class Tree(RepoObject):
README_NAMES=set(['readme.txt','README.txt','README.TXT','README'])
class __mongometa__:
polymorphic_identity='tree'
type_s = 'Tree'
type = FieldProperty(str, if_missing='tree')
object_ids = FieldProperty({str:str}) # objects[oid] = name
def __init__(self, **kw):
super(Tree, self).__init__(**kw)
# Ephemeral attrs
self.repo = None
self.commit = None
self.parent = None
self.name = None
def compute_hash(self):
'''Compute a hash based on the contents of the tree. Note that this
hash does not necessarily correspond to any actual DVCS hash.
'''
lines = [('t' + oid + name) for oid, name in self.trees.iteritems() ]
lines += [('b' + oid + name) for oid, name in self.trees.iteritems() ]
sha_obj = sha1()
for line in sorted(lines):
sha_obj.update(line)
return sha_obj.hexdigest()
def set_last_commit(self, ci, repo=None):
lc, isnew = super(Tree, self).set_last_commit(ci, repo)
if isnew:
for oid in self.object_ids:
obj = RepoObject.query.get(object_id=oid)
obj.set_last_commit(ci, repo)
return lc, isnew
@LazyProperty
def objects(self):
objects = RepoObject.query.find(dict(
object_id={'$in':self.object_ids.keys()})).all()
for o in objects:
o.set_context(self, self.object_ids[o.object_id])
return objects
@LazyProperty
def trees(self):
return [ o for o in self.objects if isinstance(o, Tree) ]
@LazyProperty
def blobs(self):
return [ o for o in self.objects if isinstance(o, Blob) ]
@LazyProperty
def object_index(self):
return dict((o.name, o) for o in self.objects)
@LazyProperty
def object_id_index(self):
return dict((name, oid) for oid,name in self.object_ids.iteritems())
def get(self, name, default=None):
return self.object_index.get(name, default)
def __getitem__(self, name):
return self.object_index[name]
@classmethod
def diff(cls, a, b, seen_objects):
'''Recursive diff of two tree objects, yielding DiffObjects'''
if not isinstance(a, Tree) or not isinstance(b, Tree):
yield DiffObject(a, b)
else:
for a_oid, a_name in a.object_ids.iteritems():
b_oid = b.object_id_index.get(a_name)
if a_oid == b_oid: continue
a_obj = seen_objects.get(a_oid)
b_obj = seen_objects.get(b_oid)
if a_obj is None: a_obj = seen_objects[a_oid] = a.get(a_name)
if b_obj is None: b_obj = seen_objects[b_oid] = b.get(a_name)
if b_obj is None:
yield DiffObject(a_obj, None)
else:
for x in cls.diff(a_obj, b_obj, seen_objects): yield x
for b_oid, b_name in b.object_ids.iteritems():
if b_name in a.object_id_index: continue
b_obj = seen_objects[b_oid] = b.get(b_name)
yield DiffObject(None, b_obj)
def set_context(self, commit_or_tree, name=None):
assert commit_or_tree is not self
self.repo = commit_or_tree.repo
if name:
self.commit = commit_or_tree.commit
self.parent = commit_or_tree
self.name = name
else:
self.commit = commit_or_tree
def readme(self):
for name in self.object_ids:
if self.object_ids[name] in self.README_NAMES:
blob = self.get_blob(self.object_ids[name])
return h.really_unicode(blob.text)
return ''
def ls(self):
for obj in sorted(self.trees, key=lambda o:o.name):
ci = obj.get_last_commit()
yield dict(kind='DIR',
last_commit=ci,
name=obj.name,
href=obj.name + '/')
for obj in sorted(self.blobs, key=lambda o:o.name):
if obj.name == '.': continue
ci = obj.get_last_commit()
yield dict(kind='FILE',
last_commit=ci,
name=obj.name,
href=obj.name)
def index_id(self):
return repr(self)
def path(self):
if self.parent:
assert self.parent is not self
return self.parent.path() + self.name + '/'
else:
return '/'
def url(self):
return self.commit.url() + 'tree' + self.path()
def is_blob(self, name):
obj = RepoObject.query.get(
object_id=self.object_id_index[name])
return isinstance(obj, Blob)
def get_tree(self, name):
t = self.get(name)
if isinstance(t, Tree): return t
return None
def get_blob(self, name, path_parts=None):
if path_parts:
t = self.get_tree(path_parts[0])
if t:
return t.get_blob(name, path_parts[1:])
else:
return None
b = self.get(name)
if isinstance(b, Blob): return b
return None
class Blob(RepoObject):
class __mongometa__:
polymorphic_identity='blob'
type_s = 'Blob'
type = FieldProperty(str, if_missing='blob')
def __init__(self, **kw):
super(Blob, self).__init__(**kw)
# Ephemeral attrs
self.repo = None
self.commit = None
self.tree = None
self.name = None
def set_context(self, tree, name):
self.repo = tree.repo
self.commit = tree.commit
self.tree = tree
self.name = name
@LazyProperty
def _content_type_encoding(self):
return self.repo.guess_type(self.name)
@LazyProperty
def content_type(self):
return self._content_type_encoding[0]
@LazyProperty
def content_encoding(self):
return self._content_type_encoding[1]
@LazyProperty
def next_commit(self):
try:
path = self.path()
cur = self.commit
next = cur.context()['next']
while next:
cur = next[0]
next = cur.context()['next']
other_blob = cur.get_path(path)
if other_blob is None or other_blob.object_id != self.object_id:
return cur
except:
log.exception('Lookup prev_commit')
return None
@LazyProperty
def prev_commit(self):
lc = self.get_last_commit()
if lc.id:
last_commit = self.repo.commit(lc.id)
if last_commit.parent_ids:
return self.repo.commit(last_commit.parent_ids[0])
return None
def url(self):
return self.tree.url() + h.really_unicode(self.name)
def path(self):
return self.tree.path() + h.really_unicode(self.name)
@property
def has_html_view(self):
return self.content_type.startswith('text/')
@property
def has_image_view(self):
return self.content_type.startswith('image/')
def context(self):
path = self.path()[1:]
prev = self.prev_commit
next = self.next_commit
if prev is not None: prev = prev.get_path(path)
if next is not None: next = next.get_path(path)
return dict(
prev=prev,
next=next)
def compute_hash(self):
'''Compute a hash based on the contents of the blob. Note that this
hash does not necessarily correspond to any actual DVCS hash.
'''
fp = self.open()
sha_obj = sha1()
while True:
buffer = fp.read(4096)
if not buffer: break
sha_obj.update(buffer)
return sha_obj.hexdigest()
def open(self):
return self.repo.open_blob(self)
def __iter__(self):
return iter(self.open())
@LazyProperty
def text(self):
return self.open().read()
@classmethod
def diff(cls, v0, v1):
differ = SequenceMatcher(v0, v1)
return differ.get_opcodes()
class CommitReference(object):
def __init__(self, commit_class, commit_id):
self.commit_class = commit_class
self.commit_id = commit_id
@property
def artifact(self):
return self.commit_class.query.get(
commit_id=self.commit_id)
class DiffObject(object):
a_path = b_path = None
a_object_id = b_object_id = None
is_new = False
is_delete = False
is_copy = False
def __init__(self, a, b):
if a:
self.a_path = a.path()
self.a_object_id = a.object_id
else:
self.is_new = True
if b:
self.b_path = b.path()
self.b_object_id = b.object_id
else:
self.is_delete = True
def __repr__(self):
if self.is_new:
return '<new %s>' % self.b_path
elif self.is_delete:
return '<remove %s>' % self.a_path
elif self.is_copy:
return '<copy %s to %s>' % (
self.a_path, self.b_path)
else:
return '<change %s>' % (self.a_path)
class GitLikeTree(object):
'''A tree node similar to that which is used in git'''
def __init__(self):
self.blobs = {} # blobs[name] = oid
self.trees = defaultdict(GitLikeTree) #trees[name] = GitLikeTree()
self._hex = None
@classmethod
def from_tree(cls, tree):
self = GitLikeTree()
for o in tree.blobs:
self.blobs[o.name] = o.object_id
for o in tree.trees:
subtree = Tree.query.get(object_id=o.object_id)
self.trees[o.name] = GitLikeTree.from_tree(subtree)
return self
def set_blob(self, path, oid):
if path.startswith('/'): path = path[1:]
path_parts = path.split('/')
dirpath, filename = path_parts[:-1], path_parts[-1]
cur = self
for part in dirpath:
cur = cur.trees[part]
cur.blobs[filename] = oid
def del_blob(self, path):
if path.startswith('/'): path = path[1:]
path_parts = path.split('/')
dirpath, filename = path_parts[:-1], path_parts[-1]
cur = self
for part in dirpath:
cur = cur.trees[part]
if filename in cur.trees:
cur.trees.pop(filename, None)
else:
cur.blobs.pop(filename, None)
def hex(self):
'''Compute a recursive sha1 hash on the tree'''
if self._hex is None:
sha_obj = sha1('tree\n' + repr(self))
self._hex = sha_obj.hexdigest()
return self._hex
def __unicode__(self):
lines = [('t %s %s' % (t.hex(), name))
for name, t in self.trees.iteritems() ]
lines += [('b %s %s' % (oid, name))
for name, oid in self.blobs.iteritems() ]
return u'\n'.join(sorted(lines))
def __repr__(self):
return unicode(self).encode('utf-8')
def topological_sort(graph):
'''Return the topological sort of a graph.
The graph is a dict with each entry representing
a node (the key is the node ID) and its parent(s) (a
set of node IDs). Result is an iterator over the topo-sorted
node IDs.
The algorithm is based on one seen in
http://en.wikipedia.org/wiki/Topological_sorting#CITEREFKahn1962
'''
# Index children, identify roots
children = defaultdict(list)
roots = []
for nid, parents in graph.items():
if not parents:
graph.pop(nid)
roots.append(nid)
for p_nid in parents: children[p_nid].append(nid)
# Topo sort
while roots:
n = roots.pop()
yield n
for child in children[n]:
graph[child].remove(n)
if not graph[child]:
graph.pop(child)
roots.append(child)
assert not graph, 'Cycle detected'
MappedClass.compile_all()