import os
import shutil
import string
import logging
import random
from collections import namedtuple
from datetime import datetime
import tg
import git
import gitdb
from pymongo.errors import DuplicateKeyError
from ming.base import Object
from ming.orm import Mapper, session, mapper
from ming.utils import LazyProperty
from allura.lib import helpers as h
from allura.lib import utils
from allura.model.repository import topological_sort
from allura import model as M
log = logging.getLogger(__name__)
gitdb.util.mman = gitdb.util.mman.__class__(
max_open_handles=128)
class Repository(M.Repository):
tool_name='Git'
repo_id='git'
type_s='Git Repository'
class __mongometa__:
name='git-repository'
@LazyProperty
def _impl(self):
return GitImplementation(self)
def suggested_clone_dest_path(self):
return super(Repository, self).suggested_clone_dest_path()[:-4]
def clone_url(self, category, username=''):
return super(Repository, self).clone_url(category, username)[:-4]
def merge_command(self, merge_request):
'''Return the command to merge a given commit to a given target branch'''
return 'git checkout %s\ngit fetch %s\ngit merge %s' % (
merge_request.target_branch,
merge_request.downstream_repo_url,
merge_request.downstream.commit_id,
)
class GitImplementation(M.RepositoryImplementation):
post_receive_template = string.Template(
'#!/bin/bash\n'
'# The following line is required for site integration, do not remove/modify\n'
'curl -s $url\n')
def __init__(self, repo):
self._repo = repo
@LazyProperty
def _git(self):
try:
return git.Repo(self._repo.full_fs_path, odbt=git.GitCmdObjectDB)
except (git.exc.NoSuchPathError, git.exc.InvalidGitRepositoryError), err:
log.error('Problem looking up repo: %r', err)
return None
def init(self):
fullname = self._setup_paths()
log.info('git init %s', fullname)
if os.path.exists(fullname):
shutil.rmtree(fullname)
repo = git.Repo.init(
path=fullname,
mkdir=True,
quiet=True,
bare=True,
shared='all')
self.__dict__['_git'] = repo
self._setup_special_files()
self._repo.status = 'ready'
def clone_from(self, source_url):
'''Initialize a repo as a clone of another'''
self._repo.status = 'cloning'
session(self._repo).flush(self._repo)
log.info('Initialize %r as a clone of %s',
self._repo, source_url)
try:
fullname = self._setup_paths(create_repo_dir=False)
if os.path.exists(fullname):
shutil.rmtree(fullname)
repo = git.Repo.clone_from(
source_url,
to_path=fullname,
bare=True)
self.__dict__['_git'] = repo
self._setup_special_files()
except:
self._repo.status = 'ready'
session(self._repo).flush(self._repo)
raise
log.info('... %r cloned', self._repo)
self._repo.refresh(notify=False)
def commit(self, rev):
'''Return a Commit object. rev can be _id or a branch/tag name'''
# See if the rev is a named ref that we have cached, and use the sha1
# from the cache. This ensures that we don't return a sha1 that we
# don't have indexed into mongo yet.
for ref in self._repo.heads + self._repo.branches + self._repo.repo_tags:
if ref.name == rev:
rev = ref.object_id
break
result = M.repo.Commit.query.get(_id=rev)
if result is None:
# find the id by branch/tag name
try:
impl = self._git.rev_parse(str(rev) + '^0')
result = M.repo.Commit.query.get(_id=impl.hexsha)
except Exception:
url = ''
try:
from tg import request
url = ' at ' + request.url
except:
pass
log.exception('Error with rev_parse(%s)%s' % (str(rev) + '^0', url))
if result is None: return None
result.set_context(self._repo)
return result
def all_commit_ids(self):
"""Yield commit ids, starting with the head(s) of the commit tree and
ending with the root (first commit).
"""
seen = set()
for head in self._git.heads:
for ci in self._git.iter_commits(head, topo_order=True):
if ci.binsha in seen: continue
seen.add(ci.binsha)
yield ci.hexsha
def new_commits(self, all_commits=False):
graph = {}
to_visit = [ self._git.commit(rev=hd.object_id) for hd in self._repo.heads ]
while to_visit:
obj = to_visit.pop()
if obj.hexsha in graph: continue
if not all_commits:
# Look up the object
if M.repo.Commit.query.find(dict(_id=obj.hexsha)).count():
graph[obj.hexsha] = set() # mark as parentless
continue
graph[obj.hexsha] = set(p.hexsha for p in obj.parents)
to_visit += obj.parents
return list(topological_sort(graph))
def refresh_heads(self):
self._repo.heads = [
Object(name=head.name, object_id=head.commit.hexsha)
for head in self._git.heads
if head.is_valid() ]
self._repo.branches = [
Object(name=head.name, object_id=head.commit.hexsha)
for head in self._git.branches
if head.is_valid() ]
self._repo.repo_tags = [
Object(name=tag.name, object_id=tag.commit.hexsha)
for tag in self._git.tags
if tag.is_valid() ]
session(self._repo).flush()
def refresh_commit_info(self, oid, seen, lazy=True):
from allura.model.repo import CommitDoc
ci_doc = CommitDoc.m.get(_id=oid)
if ci_doc and lazy: return False
ci = self._git.rev_parse(oid)
args = dict(
tree_id=ci.tree.hexsha,
committed = Object(
name=h.really_unicode(ci.committer.name),
email=h.really_unicode(ci.committer.email),
date=datetime.utcfromtimestamp(
ci.committed_date-ci.committer_tz_offset)),
authored = Object(
name=h.really_unicode(ci.author.name),
email=h.really_unicode(ci.author.email),
date=datetime.utcfromtimestamp(
ci.authored_date-ci.author_tz_offset)),
message=h.really_unicode(ci.message or ''),
child_ids=[],
parent_ids = [ p.hexsha for p in ci.parents ])
if ci_doc:
ci_doc.update(**args)
ci_doc.m.save()
else:
ci_doc = CommitDoc(dict(args, _id=ci.hexsha))
try:
ci_doc.m.insert(safe=True)
except DuplicateKeyError:
if lazy: return False
self.refresh_tree_info(ci.tree, seen, lazy)
return True
def refresh_tree_info(self, tree, seen, lazy=True):
from allura.model.repo import TreeDoc
if lazy and tree.binsha in seen: return
seen.add(tree.binsha)
doc = TreeDoc(dict(
_id=tree.hexsha,
tree_ids=[],
blob_ids=[],
other_ids=[]))
for o in tree:
obj = Object(
name=h.really_unicode(o.name),
id=o.hexsha)
if o.type == 'tree':
self.refresh_tree_info(o, seen, lazy)
doc.tree_ids.append(obj)
elif o.type == 'blob':
doc.blob_ids.append(obj)
else:
obj.type = o.type
doc.other_ids.append(obj)
doc.m.save(safe=False)
return doc
def log(self, object_id, skip, count):
obj = self._git.commit(object_id)
candidates = [ obj ]
result = []
seen = set()
while count and candidates:
candidates.sort(key=lambda c:c.committed_date)
obj = candidates.pop(-1)
if obj.hexsha in seen: continue
seen.add(obj.hexsha)
if skip == 0:
result.append(obj.hexsha)
count -= 1
else:
skip -= 1
candidates += obj.parents
return result, [ p.hexsha for p in candidates ]
def open_blob(self, blob):
return _OpenedGitBlob(
self._object(blob._id).data_stream)
def blob_size(self, blob):
return self._object(blob._id).data_stream.size
def _setup_hooks(self):
'Set up the git post-commit hook'
text = self.post_receive_template.substitute(
url=tg.config.get('base_url', 'http://localhost:8080')
+ '/auth/refresh_repo' + self._repo.url())
fn = os.path.join(self._repo.fs_path, self._repo.name, 'hooks', 'post-receive')
with open(fn, 'w') as fp:
fp.write(text)
os.chmod(fn, 0755)
def _object(self, oid):
evens = oid[::2]
odds = oid[1::2]
binsha = ''
for e,o in zip(evens, odds):
binsha += chr(int(e+o, 16))
return git.Object.new_from_sha(self._git, binsha)
def symbolics_for_commit(self, commit):
branch_heads, tags = super(self.__class__, self).symbolics_for_commit(commit)
containing_branches = self._git.git.branch(contains=commit._id)
containing_branches = [br.strip(' *') for br in containing_branches.split('\n')]
return containing_branches, tags
def compute_tree_new(self, commit, tree_path='/'):
ci = self._git.rev_parse(commit._id)
tree = self.refresh_tree_info(ci.tree, set())
return tree._id
class _OpenedGitBlob(object):
CHUNK_SIZE=4096
def __init__(self, stream):
self._stream = stream
def read(self):
return self._stream.read()
def __iter__(self):
'''
Yields one line at a time, reading from the stream
'''
buffer = ''
while True:
# Replenish buffer until we have a line break
while '\n' not in buffer:
chars = self._stream.read(self.CHUNK_SIZE)
if not chars: break
buffer += chars
if not buffer: break
eol = buffer.find('\n')
if eol == -1:
# end without \n
yield buffer
break
yield buffer[:eol+1]
buffer = buffer[eol+1:]
def close(self):
pass
Mapper.compile_all()