-#!/usr/bin/env python
-import sys, struct, mmap
+#!/bin/sh
+"""": # -*-python-*-
+bup_python="$(dirname "$0")/bup-python" || exit $?
+exec "$bup_python" "$0" ${1+"$@"}
+"""
+# end of bup preamble
+
+from __future__ import absolute_import
+import os, sys, struct, subprocess
+
from bup import options, git
-from bup.helpers import *
+from bup.git import MissingObject
+from bup.helpers import (Conn, debug1, debug2, linereader, lines_until_sentinel,
+ log)
+
suspended_w = None
+dumb_server_mode = False
+
+
+def do_help(conn, junk):
+ conn.write('Commands:\n %s\n' % '\n '.join(sorted(commands)))
+ conn.ok()
+
+
+def _set_mode():
+ global dumb_server_mode
+ dumb_server_mode = os.path.exists(git.repo('bup-dumb-server'))
+ debug1('bup server: serving in %s mode\n'
+ % (dumb_server_mode and 'dumb' or 'smart'))
+
+
+def _init_session(reinit_with_new_repopath=None):
+ if reinit_with_new_repopath is None and git.repodir:
+ return
+ git.check_repo_or_die(reinit_with_new_repopath)
+ # OK. we now know the path is a proper repository. Record this path in the
+ # environment so that subprocesses inherit it and know where to operate.
+ os.environ['BUP_DIR'] = git.repodir
+ debug1('bup server: bupdir is %r\n' % git.repodir)
+ _set_mode()
def init_dir(conn, arg):
git.init_repo(arg)
- log('bup server: bupdir initialized: %r\n' % git.repodir)
+ debug1('bup server: bupdir initialized: %r\n' % git.repodir)
+ _init_session(arg)
conn.ok()
def set_dir(conn, arg):
- git.check_repo_or_die(arg)
- log('bup server: bupdir is %r\n' % git.repodir)
+ _init_session(arg)
conn.ok()
def list_indexes(conn, junk):
- git.check_repo_or_die()
+ _init_session()
+ suffix = ''
+ if dumb_server_mode:
+ suffix = ' load'
for f in os.listdir(git.repo('objects/pack')):
if f.endswith('.idx'):
- conn.write('%s\n' % f)
+ conn.write('%s%s\n' % (f, suffix))
conn.ok()
def send_index(conn, name):
- git.check_repo_or_die()
+ _init_session()
assert(name.find('/') < 0)
assert(name.endswith('.idx'))
- idx = git.PackIdx(git.repo('objects/pack/%s' % name))
+ idx = git.open_idx(git.repo('objects/pack/%s' % name))
conn.write(struct.pack('!I', len(idx.map)))
conn.write(idx.map)
conn.ok()
-def receive_objects(conn, junk):
+def receive_objects_v2(conn, junk):
global suspended_w
- git.check_repo_or_die()
- suggested = {}
+ _init_session()
+ suggested = set()
if suspended_w:
w = suspended_w
suspended_w = None
else:
- w = git.PackWriter()
+ if dumb_server_mode:
+ w = git.PackWriter(objcache_maker=None)
+ else:
+ w = git.PackWriter()
while 1:
ns = conn.read(4)
if not ns:
w.abort()
raise Exception('object read: expected length header, got EOF\n')
n = struct.unpack('!I', ns)[0]
- #log('expecting %d bytes\n' % n)
+ #debug2('expecting %d bytes\n' % n)
if not n:
- log('bup server: received %d object%s.\n'
+ debug1('bup server: received %d object%s.\n'
% (w.count, w.count!=1 and "s" or ''))
- fullpath = w.close()
+ fullpath = w.close(run_midx=not dumb_server_mode)
if fullpath:
(dir, name) = os.path.split(fullpath)
conn.write('%s.idx\n' % name)
conn.ok()
return
elif n == 0xffffffff:
- log('bup server: receive-objects suspended.\n')
+ debug2('bup server: receive-objects suspended.\n')
suspended_w = w
conn.ok()
return
+ shar = conn.read(20)
+ crcr = struct.unpack('!I', conn.read(4))[0]
+ n -= 20 + 4
buf = conn.read(n) # object sizes in bup are reasonably small
- #log('read %d bytes\n' % n)
- if len(buf) < n:
- w.abort()
- raise Exception('object read: expected %d bytes, got %d\n'
- % (n, len(buf)))
- (type, content) = git._decode_packobj(buf)
- sha = git.calc_hash(type, content)
- oldpack = w.exists(sha)
- # FIXME: we only suggest a single index per cycle, because the client
- # is currently dumb to download more than one per cycle anyway.
- # Actually we should fix the client, but this is a minor optimization
- # on the server side.
- if not suggested and \
- oldpack and (oldpack == True or oldpack.endswith('.midx')):
- # FIXME: we shouldn't really have to know about midx files
- # at this layer. But exists() on a midx doesn't return the
- # packname (since it doesn't know)... probably we should just
- # fix that deficiency of midx files eventually, although it'll
- # make the files bigger. This method is certainly not very
- # efficient.
- w.objcache.refresh(skip_midx = True)
- oldpack = w.objcache.exists(sha)
- log('new suggestion: %r\n' % oldpack)
- assert(oldpack)
- assert(oldpack != True)
- assert(not oldpack.endswith('.midx'))
- w.objcache.refresh(skip_midx = False)
- if not suggested and oldpack:
- assert(oldpack.endswith('.idx'))
- (dir,name) = os.path.split(oldpack)
- if not (name in suggested):
- log("bup server: suggesting index %s\n" % name)
- conn.write('index %s\n' % name)
- suggested[name] = 1
- else:
- w._raw_write([buf])
+ #debug2('read %d bytes\n' % n)
+ _check(w, n, len(buf), 'object read: expected %d bytes, got %d\n')
+ if not dumb_server_mode:
+ oldpack = w.exists(shar, want_source=True)
+ if oldpack:
+ assert(not oldpack == True)
+ assert(oldpack.endswith('.idx'))
+ (dir,name) = os.path.split(oldpack)
+ if not (name in suggested):
+ debug1("bup server: suggesting index %s\n"
+ % git.shorten_hash(name))
+ debug1("bup server: because of object %s\n"
+ % shar.encode('hex'))
+ conn.write('index %s\n' % name)
+ suggested.add(name)
+ continue
+ nw, crc = w._raw_write((buf,), sha=shar)
+ _check(w, crcr, crc, 'object read: expected crc %d, got %d\n')
# NOTREACHED
+
+
+def _check(w, expected, actual, msg):
+ if expected != actual:
+ w.abort()
+ raise Exception(msg % (expected, actual))
def read_ref(conn, refname):
- git.check_repo_or_die()
+ _init_session()
r = git.read_ref(refname)
conn.write('%s\n' % (r or '').encode('hex'))
conn.ok()
def update_ref(conn, refname):
- git.check_repo_or_die()
+ _init_session()
newval = conn.readline().strip()
oldval = conn.readline().strip()
git.update_ref(refname, newval.decode('hex'), oldval.decode('hex'))
conn.ok()
-
-cat_pipe = None
-def cat(conn, id):
- global cat_pipe
- git.check_repo_or_die()
- if not cat_pipe:
- cat_pipe = git.CatPipe()
+def join(conn, id):
+ _init_session()
try:
- for blob in cat_pipe.join(id):
+ for blob in git.cp().join(id):
conn.write(struct.pack('!I', len(blob)))
conn.write(blob)
- except KeyError, e:
+ except KeyError as e:
log('server: error: %s\n' % e)
conn.write('\0\0\0\0')
conn.error(e)
conn.write('\0\0\0\0')
conn.ok()
+def cat_batch(conn, dummy):
+ _init_session()
+ cat_pipe = git.cp()
+ # For now, avoid potential deadlock by just reading them all
+ for ref in tuple(lines_until_sentinel(conn, '\n', Exception)):
+ ref = ref[:-1]
+ it = cat_pipe.get(ref)
+ info = next(it)
+ if not info[0]:
+ conn.write('missing\n')
+ continue
+ conn.write('%s %s %d\n' % info)
+ for buf in it:
+ conn.write(buf)
+ conn.ok()
+
+def refs(conn, args):
+ limit_to_heads, limit_to_tags = args.split()
+ assert limit_to_heads in ('0', '1')
+ assert limit_to_tags in ('0', '1')
+ limit_to_heads = int(limit_to_heads)
+ limit_to_tags = int(limit_to_tags)
+ _init_session()
+ patterns = tuple(x[:-1] for x in lines_until_sentinel(conn, '\n', Exception))
+ for name, oid in git.list_refs(patterns=patterns,
+ limit_to_heads=limit_to_heads,
+ limit_to_tags=limit_to_tags):
+ assert '\n' not in name
+ conn.write('%s %s\n' % (oid.encode('hex'), name))
+ conn.write('\n')
+ conn.ok()
+
+def rev_list(conn, _):
+ _init_session()
+ count = conn.readline()
+ if not count:
+ raise Exception('Unexpected EOF while reading rev-list count')
+ count = None if count == '\n' else int(count)
+ fmt = conn.readline()
+ if not fmt:
+ raise Exception('Unexpected EOF while reading rev-list format')
+ fmt = None if fmt == '\n' else fmt[:-1]
+ refs = tuple(x[:-1] for x in lines_until_sentinel(conn, '\n', Exception))
+ args = git.rev_list_invocation(refs, count=count, format=fmt)
+ p = subprocess.Popen(git.rev_list_invocation(refs, count=count, format=fmt),
+ preexec_fn=git._gitenv(git.repodir),
+ stdout=subprocess.PIPE)
+ while True:
+ out = p.stdout.read(64 * 1024)
+ if not out:
+ break
+ conn.write(out)
+ rv = p.wait() # not fatal
+ if rv:
+ msg = 'git rev-list returned error %d' % rv
+ conn.error(msg)
+ raise GitError(msg)
+ conn.ok()
+
optspec = """
bup server
"""
-o = options.Options('bup server', optspec)
+o = options.Options(optspec)
(opt, flags, extra) = o.parse(sys.argv[1:])
if extra:
o.fatal('no arguments expected')
-log('bup server: reading from stdin.\n')
+debug2('bup server: reading from stdin.\n')
commands = {
+ 'quit': None,
+ 'help': do_help,
'init-dir': init_dir,
'set-dir': set_dir,
'list-indexes': list_indexes,
'send-index': send_index,
- 'receive-objects': receive_objects,
+ 'receive-objects-v2': receive_objects_v2,
'read-ref': read_ref,
'update-ref': update_ref,
- 'cat': cat,
+ 'join': join,
+ 'cat': join, # apocryphal alias
+ 'cat-batch' : cat_batch,
+ 'refs': refs,
+ 'rev-list': rev_list
}
# FIXME: this protocol is totally lame and not at all future-proof.
line = _line.strip()
if not line:
continue
- log('bup server: command: %r\n' % line)
+ debug1('bup server: command: %r\n' % line)
words = line.split(' ', 1)
cmd = words[0]
rest = len(words)>1 and words[1] or ''
else:
raise Exception('unknown server command: %r\n' % line)
-log('bup server: done\n')
+debug1('bup server: done\n')
projects / bup.git / blobdiff