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diff --git a/swh/loader/mercurial/bundle20_loader.py b/swh/loader/mercurial/bundle20_loader.py
index 806cf4e..923f7e0 100644
--- a/swh/loader/mercurial/bundle20_loader.py
+++ b/swh/loader/mercurial/bundle20_loader.py
@@ -1,460 +1,467 @@
# Copyright (C) 2017-2018 The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information
"""This document contains a SWH loader for ingesting repository data
from Mercurial version 2 bundle files.
"""
# NOTE: The code here does expensive work twice in places because of the
# intermediate need to check for what is missing before sending to the database
# and the desire to not juggle very large amounts of data.
# TODO: Decide whether to also serialize to disk and read back more quickly
# from there. Maybe only for very large repos and fast drives.
# - Avi
import datetime
import hglib
import os
from dateutil import parser
from shutil import rmtree
from tempfile import mkdtemp
from swh.model import hashutil, identifiers
from swh.loader.core.loader import SWHStatelessLoader
from swh.loader.core.converters import content_for_storage
from . import converters
from .archive_extract import tmp_extract
from .bundle20_reader import Bundle20Reader
from .converters import PRIMARY_ALGO as ALGO
from .objects import SelectiveCache, SimpleTree
class HgBundle20Loader(SWHStatelessLoader):
"""Mercurial loader able to deal with remote or local repository.
"""
CONFIG_BASE_FILENAME = 'loader/hg'
ADDITIONAL_CONFIG = {
'bundle_filename': ('str', 'HG20_none_bundle'),
'reduce_effort': ('bool', True), # default: Try to be smart about time
}
def __init__(self, logging_class='swh.loader.mercurial.Bundle20Loader'):
super().__init__(logging_class=logging_class)
self.content_max_size_limit = self.config['content_size_limit']
self.bundle_filename = self.config['bundle_filename']
self.hg = None
self.reduce_effort_flag = self.config['reduce_effort']
self.empty_repository = None
def cleanup(self):
"""Clean temporary working directory
"""
if self.bundle_path and os.path.exists(self.bundle_path):
self.log.debug('Cleanup up working bundle %s' % self.bundle_path)
os.unlink(self.bundle_path)
if self.working_directory and os.path.exists(self.working_directory):
self.log.debug('Cleanup up working directory %s' % (
self.working_directory, ))
rmtree(self.working_directory)
+ if self.repo:
+ self.repo.close()
def prepare(self, origin_url, visit_date, directory=None):
"""Prepare the necessary steps to load an actual remote or local
repository.
To load a local repository, pass the optional directory
parameter as filled with a path to a real local folder.
To load a remote repository, pass the optional directory
parameter as None.
Args:
origin_url (str): Origin url to load
visit_date (str/datetime): Date of the visit
directory (str/None): The local directory to load
"""
self.origin_url = origin_url
self.origin = self.get_origin()
if isinstance(visit_date, str): # visit_date
visit_date = parser.parse(visit_date)
self.visit_date = visit_date
self.working_directory = None
self.bundle_path = None
self.branches = {}
self.tags = []
self.releases = {}
try:
if not directory: # remote repository
self.working_directory = mkdtemp(
suffix='.tmp',
prefix='swh.loader.mercurial.',
dir='/tmp')
os.makedirs(self.working_directory, exist_ok=True)
self.hgdir = self.working_directory
self.log.debug('Cloning %s to %s' % (
self.origin_url, self.hgdir))
hglib.clone(source=self.origin_url, dest=self.hgdir)
else: # local repository
self.working_directory = None
self.hgdir = directory
self.bundle_path = os.path.join(self.hgdir, self.bundle_filename)
self.log.debug('Bundling at %s' % self.bundle_path)
- with hglib.open(self.hgdir) as repo:
- repo.bundle(bytes(self.bundle_path, 'utf-8'),
- all=True,
- type=b'none-v2')
+ self.repo = hglib.open(self.hgdir)
+ self.heads = self.get_heads()
+ self.repo.bundle(bytes(self.bundle_path, 'utf-8'),
+ all=True,
+ type=b'none-v2')
+
except Exception:
self.cleanup()
raise
try:
self.br = Bundle20Reader(self.bundle_path)
except FileNotFoundError as e:
# Empty repository! Still a successful visit targeting an
# empty snapshot
self.log.warn('%s is an empty repository!' % self.hgdir)
self.empty_repository = True
else:
self.reduce_effort = set()
if self.reduce_effort_flag:
now = datetime.datetime.now(tz=datetime.timezone.utc)
if (now - self.visit_date).days > 1:
# Assuming that self.visit_date would be today for
# a new visit, treat older visit dates as
# indication of wanting to skip some processing
# effort.
for header, commit in self.br.yield_all_changesets():
ts = commit['time'].timestamp()
if ts < self.visit_date.timestamp():
self.reduce_effort.add(header['node'])
def has_contents(self):
return not self.empty_repository
def has_directories(self):
return not self.empty_repository
def has_revisions(self):
return not self.empty_repository
def has_releases(self):
return not self.empty_repository
def get_origin(self):
"""Get the origin that is currently being loaded in format suitable for
swh.storage."""
return {
'type': 'hg',
'url': self.origin_url
}
def fetch_data(self):
"""Fetch the data from the data source."""
pass
def get_contents(self):
"""Get the contents that need to be loaded."""
# NOTE: This method generates blobs twice to reduce memory usage
# without generating disk writes.
self.file_node_to_hash = {}
hash_to_info = {}
self.num_contents = 0
contents = {}
missing_contents = set()
for blob, node_info in self.br.yield_all_blobs():
self.num_contents += 1
file_name = node_info[0]
header = node_info[2]
if header['linknode'] in self.reduce_effort:
content = hashutil.hash_data(blob, algorithms=[ALGO],
with_length=True)
else:
content = hashutil.hash_data(blob, with_length=True)
blob_hash = content[ALGO]
self.file_node_to_hash[header['node']] = blob_hash
if header['linknode'] in self.reduce_effort:
continue
hash_to_info[blob_hash] = node_info
contents[blob_hash] = content
missing_contents.add(blob_hash)
if file_name == b'.hgtags':
# https://www.mercurial-scm.org/wiki/GitConcepts#Tag_model
# overwrite until the last one
self.tags = (t for t in blob.split(b'\n') if t != b'')
if contents:
missing_contents = set(
self.storage.content_missing(
list(contents.values()),
key_hash=ALGO
)
)
# Clusters needed blobs by file offset and then only fetches the
# groups at the needed offsets.
focs = {} # "file/offset/contents"
for blob_hash in missing_contents:
_, file_offset, header = hash_to_info[blob_hash]
focs.setdefault(file_offset, {})
focs[file_offset][header['node']] = blob_hash
hash_to_info = None
for offset, node_hashes in sorted(focs.items()):
for header, data, *_ in self.br.yield_group_objects(
group_offset=offset
):
node = header['node']
if node in node_hashes:
blob, meta = self.br.extract_meta_from_blob(data)
content = contents.pop(node_hashes[node], None)
if content:
content['data'] = blob
content['length'] = len(blob)
yield content_for_storage(
content,
log=self.log,
max_content_size=self.content_max_size_limit,
origin_id=self.origin_id
)
def load_directories(self):
"""This is where the work is done to convert manifest deltas from the
repository bundle into SWH directories.
"""
self.mnode_to_tree_id = {}
cache_hints = self.br.build_manifest_hints()
def tree_size(t):
return t.size()
self.trees = SelectiveCache(cache_hints=cache_hints,
size_function=tree_size)
tree = SimpleTree()
for header, added, removed in self.br.yield_all_manifest_deltas(
cache_hints
):
node = header['node']
basenode = header['basenode']
tree = self.trees.fetch(basenode) or tree # working tree
for path in removed.keys():
tree = tree.remove_tree_node_for_path(path)
for path, info in added.items():
file_node, is_symlink, perms_code = info
tree = tree.add_blob(
path,
self.file_node_to_hash[file_node],
is_symlink,
perms_code
)
if header['linknode'] in self.reduce_effort:
self.trees.store(node, tree)
else:
new_dirs = []
self.mnode_to_tree_id[node] = tree.hash_changed(new_dirs)
self.trees.store(node, tree)
yield header, tree, new_dirs
def get_directories(self):
"""Get the directories that need to be loaded."""
missing_dirs = []
self.num_directories = 0
for header, tree, new_dirs in self.load_directories():
for d in new_dirs:
self.num_directories += 1
missing_dirs.append(d['id'])
# NOTE: This method generates directories twice to reduce memory usage
# without generating disk writes.
if missing_dirs:
missing_dirs = set(
self.storage.directory_missing(missing_dirs)
)
for header, tree, new_dirs in self.load_directories():
for d in new_dirs:
if d['id'] in missing_dirs:
yield d
def get_revisions(self):
"""Get the revisions that need to be loaded."""
revisions = {}
self.num_revisions = 0
for header, commit in self.br.yield_all_changesets():
if header['node'] in self.reduce_effort:
continue
self.num_revisions += 1
date_dict = identifiers.normalize_timestamp(
int(commit['time'].timestamp())
)
author_dict = converters.parse_author(commit['user'])
if commit['manifest'] == Bundle20Reader.NAUGHT_NODE:
directory_id = SimpleTree().hash_changed()
else:
directory_id = self.mnode_to_tree_id[commit['manifest']]
extra_meta = []
- branches = []
extra = commit.get('extra')
if extra:
for e in extra.split(b'\x00'):
k, v = e.split(b':', 1)
k = k.decode('utf-8')
extra_meta.append([k, v])
- if k == 'branch': # if named branch, we use it in snapshot
- branches.append(v)
revision = {
'author': author_dict,
'date': date_dict,
'committer': author_dict,
'committer_date': date_dict,
'type': 'hg',
'directory': directory_id,
'message': commit['message'],
'metadata': {
'node': hashutil.hash_to_hex(header['node']),
'extra_headers': [
['time_offset_seconds',
str(commit['time_offset_seconds']).encode('utf-8')],
] + extra_meta
},
'synthetic': False,
'parents': [
header['p1'],
header['p2']
]
}
revision['id'] = hashutil.hash_to_bytes(
identifiers.revision_identifier(revision))
revisions[revision['id']] = revision
- if branches:
- for name in branches:
- self.branches[name] = revision['id']
-
missing_revs = revisions.keys()
if missing_revs:
missing_revs = set(
self.storage.revision_missing(list(missing_revs))
)
for r in missing_revs:
yield revisions[r]
self.mnode_to_tree_id = None
def get_releases(self):
"""Get the releases that need to be loaded."""
self.num_releases = 0
releases = {}
missing_releases = []
for t in self.tags:
self.num_releases += 1
node, name = t.split(b' ')
release = {
'name': name,
'target': hashutil.hash_to_bytes(node.decode()),
'target_type': 'revision',
'message': None,
'metadata': None,
'synthetic': False,
'author': {'name': None, 'email': None, 'fullname': b''},
'date': None
}
id_hash = hashutil.hash_to_bytes(
identifiers.release_identifier(release))
release['id'] = id_hash
missing_releases.append(id_hash)
releases[id_hash] = release
self.releases[name] = id_hash
if missing_releases:
missing_releases = set(
self.storage.release_missing(missing_releases))
for _id in missing_releases:
yield releases[_id]
+ def get_heads(self):
+ """Read the branches' heads.
+
+ """
+ branches = {}
+ for _, node_hash_id, _, branch_name, *_ in self.repo.heads():
+ branches[branch_name] = node_hash_id
+
+ return branches
+
def get_snapshot(self):
"""Get the snapshot that need to be loaded."""
self.num_snapshot = 1
- if not self.branches:
- # FIXME: Use `default` branch targeting the tip revision
- pass
branches = {}
- for name, target in self.branches.items():
- branches[name] = {'target': target, 'target_type': 'revision'}
+ for name, target in self.heads.items():
+ branches[name] = {
+ 'target': hashutil.hash_to_bytes(target.decode()),
+ 'target_type': 'revision'
+ }
for name, target in self.releases.items():
branches[name] = {'target': target, 'target_type': 'release'}
snap = {
'id': None,
'branches': branches,
}
snap['id'] = identifiers.identifier_to_bytes(
identifiers.snapshot_identifier(snap))
return snap
def get_fetch_history_result(self):
"""Return the data to store in fetch_history."""
return {
'contents': self.num_contents,
'directories': self.num_directories,
'revisions': self.num_revisions,
'releases': self.num_releases,
'snapshot': self.num_snapshot
}
class HgArchiveBundle20Loader(HgBundle20Loader):
"""Mercurial loader for repository wrapped within archives.
"""
def __init__(self):
super().__init__(
logging_class='swh.loader.mercurial.HgArchiveBundle20Loader')
def prepare(self, origin_url, archive_path, visit_date):
self.temp_dir = tmp_extract(archive=archive_path,
prefix='swh.loader.mercurial.',
log=self.log,
source=origin_url)
repo_name = os.listdir(self.temp_dir)[0]
directory = os.path.join(self.temp_dir, repo_name)
try:
super().prepare(origin_url, visit_date, directory=directory)
except Exception:
self.cleanup()
raise
def cleanup(self):
if os.path.exists(self.temp_dir):
rmtree(self.temp_dir)
super().cleanup()

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