import os
import re
import shutil
import logging
from binascii import b2a_hex
from datetime import datetime
from cStringIO import StringIO
from ConfigParser import ConfigParser
import tg
os.environ['HGRCPATH'] = '' # disable loading .hgrc
from mercurial import ui, hg
from ming.base import Object
from ming.orm import Mapper, session
from ming.utils import LazyProperty
from allura import model as M
from allura.lib import helpers as h
from allura.model.repository import topological_sort, GitLikeTree
log = logging.getLogger(__name__)
class Repository(M.Repository):
tool_name='Hg'
repo_id='hg'
type_s='Hg Repository'
class __mongometa__:
name='hg-repository'
@LazyProperty
def _impl(self):
return HgImplementation(self)
def merge_command(self, merge_request):
'''Return the command to merge a given commit into a given target branch'''
return 'hg checkout %s;\nhg pull -r %s %s; hg merge %s' % (
merge_request.target_branch,
merge_request.downstream.commit_id,
merge_request.downstream_repo_url,
merge_request.downstream.commit_id)
def count(self, branch='default'):
return super(Repository, self).count(branch)
def log(self, branch='default', offset=0, limit=10):
return super(Repository, self).log(branch, offset, limit)
class HgImplementation(M.RepositoryImplementation):
re_hg_user = re.compile('(.*) <(.*)>')
def __init__(self, repo):
self._repo = repo
@LazyProperty
def _hg(self):
return hg.repository(ui.ui(), self._repo.full_fs_path)
def init(self):
fullname = self._setup_paths()
log.info('hg init %s', fullname)
if os.path.exists(fullname):
shutil.rmtree(fullname)
repo = hg.repository(
ui.ui(), self._repo.full_fs_path, create=True)
self.__dict__['_hg'] = repo
self._setup_special_files()
self._repo.status = 'ready'
def clone_from(self, source_url):
'''Initialize a repo as a clone of another'''
fullname = self._setup_paths(create_repo_dir=False)
if os.path.exists(fullname):
shutil.rmtree(fullname)
log.info('Initialize %r as a clone of %s',
self._repo, source_url)
# !$ hg doesn't like unicode as urls
src, repo = hg.clone(
ui.ui(),
source_url.encode('utf-8'),
self._repo.full_fs_path.encode('utf-8'),
update=False)
self.__dict__['_hg'] = repo
self._setup_special_files()
self._repo.status = 'analyzing'
session(self._repo).flush()
log.info('... %r cloned, analyzing', self._repo)
self._repo.refresh()
self._repo.status = 'ready'
log.info('... %s ready', self._repo)
session(self._repo).flush()
def commit(self, rev):
result = M.Commit.query.get(object_id=rev)
if result is None:
try:
impl = self._hg[str(rev)]
result = M.Commit.query.get(object_id=impl.hex())
except Exception, e:
log.exception(e)
if result is None: return None
result.set_context(self._repo)
return result
def new_commits(self, all_commits=False):
graph = {}
to_visit = [ self._hg[hd.object_id] for hd in self._repo.heads ]
while to_visit:
obj = to_visit.pop()
if obj.hex() in graph: continue
if not all_commits:
# Look up the object
if M.Commit.query.find(dict(object_id=obj.hex())).count():
graph[obj.hex()] = set() # mark as parentless
continue
graph[obj.hex()] = set(
p.hex() for p in obj.parents()
if p.hex() != obj.hex())
to_visit += obj.parents()
return list(topological_sort(graph))
def commit_context(self, commit):
prev_ids = commit.parent_ids
prev = M.Commit.query.find(dict(
object_id={'$in':prev_ids})).all()
next = M.Commit.query.find(dict(
parent_ids=commit.object_id,
repositories=self._repo._id)).all()
for ci in prev + next:
ci.set_context(self._repo)
return dict(prev=prev, next=next)
def refresh_heads(self):
self._repo.heads = [
Object(name=None, object_id=self._hg[head].hex())
for head in self._hg.heads() ]
self._repo.branches = [
Object(name=name, object_id=self._hg[tag].hex())
for name, tag in self._hg.branchtags().iteritems() ]
self._repo.repo_tags = [
Object(name=name, object_id=self._hg[tag].hex())
for name, tag in self._hg.tags().iteritems() ]
session(self._repo).flush()
def refresh_commit(self, ci, seen_object_ids):
obj = self._hg[ci.object_id]
# Save commit metadata
mo = self.re_hg_user.match(obj.user())
if mo:
user_name, user_email = mo.groups()
else:
user_name = user_email = obj.user()
ci.committed = Object(
name=user_name,
email=user_email,
date=datetime.utcfromtimestamp(sum(obj.date())))
ci.authored=Object(ci.committed)
ci.message=obj.description() or ''
ci.parent_ids=[
p.hex() for p in obj.parents()
if p.hex() != obj.hex() ]
# Save commit tree (must build a fake git-like tree from the changectx)
fake_tree = self._tree_from_changectx(obj)
ci.tree_id = fake_tree.hex()
tree, isnew = M.Tree.upsert(fake_tree.hex())
if isnew:
tree.set_context(ci)
self._refresh_tree(tree, fake_tree)
def log(self, object_id, skip, count):
obj = self._hg[object_id]
candidates = [ obj ]
result = []
seen = set()
while count and candidates:
candidates.sort(key=lambda c:sum(c.date()))
obj = candidates.pop(-1)
if obj.hex() in seen: continue
seen.add(obj.hex())
if skip == 0:
result.append(obj.hex())
count -= 1
else:
skip -= 1
candidates += obj.parents()
return result, [ p.hex() for p in candidates ]
def open_blob(self, blob):
fctx = self._hg[blob.commit.object_id][h.really_unicode(blob.path()).encode('utf-8')[1:]]
return StringIO(fctx.data())
def _setup_hooks(self):
'Set up the hg changegroup hook'
cp = ConfigParser()
fn = os.path.join(self._repo.fs_path, self._repo.name, '.hg', 'hgrc')
cp.read(fn)
if not cp.has_section('hooks'):
cp.add_section('hooks')
url = (tg.config.get('base_url', 'http://localhost:8080')
+ '/auth/refresh_repo' + self._repo.url())
cp.set('hooks','changegroup','curl -s %s' % url)
with open(fn, 'w') as fp:
cp.write(fp)
os.chmod(fn, 0755)
def _tree_from_changectx(self, changectx):
'''Build a fake git-like tree from a changectx and its manifest'''
root = GitLikeTree()
for filepath in changectx.manifest():
fctx = changectx[filepath]
oid = b2a_hex(fctx.filenode())
root.set_blob(filepath, oid)
return root
def _refresh_tree(self, tree, obj):
tree.object_ids=[
Object(object_id=o.hex(), name=name)
for name, o in obj.trees.iteritems() ]
tree.object_ids += [
Object(object_id=oid, name=name)
for name, oid in obj.blobs.iteritems() ]
for name, o in obj.trees.iteritems():
subtree, isnew = M.Tree.upsert(o.hex())
if isnew:
subtree.set_context(tree, name)
self._refresh_tree(subtree, o)
for name, oid in obj.blobs.iteritems():
blob, isnew = M.Blob.upsert(oid)
def symbolics_for_commit(self, commit):
branch_heads, tags = super(self.__class__, self).symbolics_for_commit(commit)
ctx = self._hg[commit.object_id]
return [ctx.branch()], tags
Mapper.compile_all()