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diff --git a/swh/loader/mercurial/bundle20_loader.py b/swh/loader/mercurial/bundle20_loader.py
index 399de6e..0a38315 100644
--- a/swh/loader/mercurial/bundle20_loader.py
+++ b/swh/loader/mercurial/bundle20_loader.py
@@ -1,405 +1,409 @@
-# Copyright (C) 2017 The Software Heritage developers
+# 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 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'),
}
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.tags = []
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)
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.
"""
self.origin_url = origin_url
self.origin = self.get_origin()
self.visit_date = visit_date
self.working_directory = None
self.bundle_path = None
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')
except Exception:
self.cleanup()
raise
self.br = Bundle20Reader(self.bundle_path)
now = datetime.datetime.now(tz=datetime.timezone.utc)
self.reduce_effort = set()
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():
if commit['time'].timestamp() < self.visit_date.timestamp():
self.reduce_effort.add(header['node'])
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])
else:
content = hashutil.hash_data(blob)
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'')
missing_contents = set(
self.storage.content_missing(
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.
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."""
self.branches = {}
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 = []
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': # needed for Occurrences
self.branches[v] = header['node']
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
missing_revs = revisions.keys()
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
missing_releases = set(self.storage.release_missing(missing_releases))
for _id in missing_releases:
yield releases[_id]
- def get_occurrences(self):
- """Get the occurrences that need to be loaded."""
- self.num_occurrences = 0
- for name, target in self.branches.items():
- self.num_occurrences += 1
- yield {
- 'branch': name,
- 'origin': self.origin_id,
- 'target': target,
- 'target_type': 'revision',
- 'visit': self.visit,
+ def get_snapshot(self):
+ """Get the snapshot that need to be loaded."""
+ self.num_snapshot = 1
+ snap = {
+ 'id': None,
+ 'branches': {
+ name: {
+ 'target': target,
+ 'target_type': 'revision',
+ }
+ for name, target in self.branches.items()
}
+ }
+ 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,
- 'occurrences': self.num_occurrences
+ '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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