import errno, os, sys, zlib, time, subprocess, struct, stat, re, tempfile, glob
from collections import namedtuple
from itertools import islice
+from numbers import Integral
from bup import _helpers, hashsplit, path, midx, bloom, xstat
from bup.helpers import (Sha1, add_error, chunkyreader, debug1, debug2,
def get_commit_items(id, cp):
commit_it = cp.get(id)
- assert(commit_it.next() == 'commit')
+ _, typ, _ = next(commit_it)
+ assert(typ == 'commit')
commit_content = ''.join(commit_it)
return parse_commit(commit_content)
return env
-def list_refs(refnames=None, repo_dir=None,
+def list_refs(patterns=None, repo_dir=None,
limit_to_heads=False, limit_to_tags=False):
"""Yield (refname, hash) tuples for all repository refs unless
- refnames are specified. In that case, only include tuples for
- those refs. The limits restrict the result items to refs/heads or
- refs/tags. If both limits are specified, items from both sources
- will be included.
+ patterns are specified. In that case, only include tuples for
+ refs matching those patterns (cf. git-show-ref(1)). The limits
+ restrict the result items to refs/heads or refs/tags. If both
+ limits are specified, items from both sources will be included.
"""
argv = ['git', 'show-ref']
if limit_to_tags:
argv.append('--tags')
argv.append('--')
- if refnames:
- argv += refnames
+ if patterns:
+ argv.extend(patterns)
p = subprocess.Popen(argv,
preexec_fn = _gitenv(repo_dir),
stdout = subprocess.PIPE)
def read_ref(refname, repo_dir = None):
"""Get the commit id of the most recent commit made on a given ref."""
- refs = list_refs(refnames=[refname], repo_dir=repo_dir, limit_to_heads=True)
+ refs = list_refs(patterns=[refname], repo_dir=repo_dir, limit_to_heads=True)
l = tuple(islice(refs, 2))
if l:
assert(len(l) == 1)
"""
assert(not ref.startswith('-'))
opts = []
- if count:
- opts += ['-n', str(atoi(count))]
+ if isinstance(count, Integral):
+ opts += ['-n', str(count)]
+ else:
+ assert not count
argv = ['git', 'rev-list', '--pretty=format:%at'] + opts + [ref, '--']
p = subprocess.Popen(argv,
preexec_fn = _gitenv(repo_dir),
def next(self):
try:
- return self.it.next()
+ return next(self.it)
except StopIteration as e:
self.done = True
raise
self.abort()
-class MissingObject(KeyError):
- def __init__(self, id):
- self.id = id
- KeyError.__init__(self, 'object %r is missing' % id.encode('hex'))
-
-
_ver_warned = 0
class CatPipe:
"""Link to 'git cat-file' that is used to retrieve blob data."""
self.repo_dir = repo_dir
wanted = ('1','5','6')
if ver() < wanted:
- if not _ver_warned:
- log('warning: git version < %s; bup will be slow.\n'
- % '.'.join(wanted))
- _ver_warned = 1
- self.get = self._slow_get
- else:
- self.p = self.inprogress = None
- self.get = self._fast_get
+ log('error: git version must be at least 1.5.6\n')
+ sys.exit(1)
+ self.p = self.inprogress = None
def _abort(self):
if self.p:
bufsize = 4096,
preexec_fn = _gitenv(self.repo_dir))
- def _fast_get(self, id):
+ def get(self, ref):
+ """Yield (oidx, type, size), followed by the data referred to by ref.
+ If ref does not exist, only yield (None, None, None).
+
+ """
if not self.p or self.p.poll() != None:
self.restart()
assert(self.p)
poll_result = self.p.poll()
assert(poll_result == None)
if self.inprogress:
- log('_fast_get: opening %r while %r is open\n'
- % (id, self.inprogress))
+ log('get: opening %r while %r is open\n' % (ref, self.inprogress))
assert(not self.inprogress)
- assert(id.find('\n') < 0)
- assert(id.find('\r') < 0)
- assert(not id.startswith('-'))
- self.inprogress = id
- self.p.stdin.write('%s\n' % id)
+ assert(ref.find('\n') < 0)
+ assert(ref.find('\r') < 0)
+ assert(not ref.startswith('-'))
+ self.inprogress = ref
+ self.p.stdin.write('%s\n' % ref)
self.p.stdin.flush()
hdr = self.p.stdout.readline()
if hdr.endswith(' missing\n'):
self.inprogress = None
- raise MissingObject(id.decode('hex'))
- spl = hdr.split(' ')
- if len(spl) != 3 or len(spl[0]) != 40:
- raise GitError('expected blob, got %r' % spl)
- (hex, type, size) = spl
-
- it = _AbortableIter(chunkyreader(self.p.stdout, int(spl[2])),
- onabort = self._abort)
+ yield None, None, None
+ return
+ info = hdr.split(' ')
+ if len(info) != 3 or len(info[0]) != 40:
+ raise GitError('expected object (id, type, size), got %r' % spl)
+ oidx, typ, size = info
+ size = int(size)
+ it = _AbortableIter(chunkyreader(self.p.stdout, size),
+ onabort=self._abort)
try:
- yield type
+ yield oidx, typ, size
for blob in it:
yield blob
readline_result = self.p.stdout.readline()
it.abort()
raise
- def _slow_get(self, id):
- assert(id.find('\n') < 0)
- assert(id.find('\r') < 0)
- assert(id[0] != '-')
- type = _git_capture(['git', 'cat-file', '-t', id]).strip()
- yield type
-
- p = subprocess.Popen(['git', 'cat-file', type, id],
- stdout=subprocess.PIPE,
- preexec_fn = _gitenv(self.repo_dir))
- for blob in chunkyreader(p.stdout):
- yield blob
- _git_wait('git cat-file', p)
-
def _join(self, it):
- type = it.next()
- if type == 'blob':
+ _, typ, _ = next(it)
+ if typ == 'blob':
for blob in it:
yield blob
- elif type == 'tree':
+ elif typ == 'tree':
treefile = ''.join(it)
for (mode, name, sha) in tree_decode(treefile):
for blob in self.join(sha.encode('hex')):
yield blob
- elif type == 'commit':
+ elif typ == 'commit':
treeline = ''.join(it).split('\n')[0]
assert(treeline.startswith('tree '))
for blob in self.join(treeline[5:]):
yield blob
else:
raise GitError('invalid object type %r: expected blob/tree/commit'
- % type)
+ % typ)
def join(self, id):
"""Generate a list of the content of all blobs that can be reached
return tags
+class MissingObject(KeyError):
+ def __init__(self, oid):
+ self.oid = oid
+ KeyError.__init__(self, 'object %r is missing' % oid.encode('hex'))
+
+
WalkItem = namedtuple('WalkItem', ['id', 'type', 'mode',
'path', 'chunk_path', 'data'])
# The path is the mangled path, and if an item represents a fragment
continue
item_it = cat_pipe.get(id)
- type = item_it.next()
- if type not in ('blob', 'commit', 'tree'):
- raise Exception('unexpected repository object type %r' % type)
+ get_oidx, typ, _ = next(item_it)
+ if not get_oidx:
+ raise MissingObject(id.decode('hex'))
+ if typ not in ('blob', 'commit', 'tree'):
+ raise Exception('unexpected repository object type %r' % typ)
# FIXME: set the mode based on the type when the mode is None
- if type == 'blob' and not include_data:
+ if typ == 'blob' and not include_data:
# Dump data until we can ask cat_pipe not to fetch it
for ignored in item_it:
pass
else:
data = ''.join(item_it)
- yield WalkItem(id=id, type=type,
+ yield WalkItem(id=id, type=typ,
chunk_path=chunk_path, path=parent_path,
mode=mode,
data=(data if include_data else None))
- if type == 'commit':
+ if typ == 'commit':
commit_items = parse_commit(data)
for pid in commit_items.parents:
pending.append((pid, parent_path, chunk_path, mode))
pending.append((commit_items.tree, parent_path, chunk_path,
hashsplit.GIT_MODE_TREE))
- elif type == 'tree':
+ elif typ == 'tree':
for mode, name, ent_id in tree_decode(data):
demangled, bup_type = demangle_name(name, mode)
if chunk_path:
projects / bup.git / blobdiff