sapling/hgsubversion/editor.py
2016-06-26 21:10:36 -04:00

680 lines
25 KiB
Python

import errno
import sys
import tempfile
import shutil
import os
from mercurial import util as hgutil
from mercurial import revlog
from mercurial import node
import svnwrap
import util
import svnexternals
class EditingError(Exception):
pass
class FileStore(object):
def __init__(self, maxsize=None):
self._tempdir = None
self._files = {}
self._created = 0
self._maxsize = maxsize
if self._maxsize is None:
self._maxsize = 100*(2**20)
self._size = 0
self._data = {}
self._popped = set()
def setfile(self, fname, data):
if fname in self._popped:
raise EditingError('trying to set a popped file %s' % fname)
if fname in self._data:
self._size -= len(self._data[fname])
del self._data[fname]
if fname in self._files:
del self._files[fname]
if self._maxsize < 0 or (len(data) + self._size) <= self._maxsize:
self._data[fname] = data
self._size += len(data)
else:
if self._tempdir is None:
self._tempdir = tempfile.mkdtemp(prefix='hg-subversion-')
# Avoid filename issues with these simple names
fn = str(self._created)
fp = hgutil.posixfile(os.path.join(self._tempdir, fn), 'wb')
try:
fp.write(data)
finally:
fp.close()
self._created += 1
self._files[fname] = fn
def delfile(self, fname):
if fname in self._popped:
raise EditingError('trying to delete a popped file %s' % fname)
if fname in self._data:
del self._data[fname]
elif fname in self._files:
path = os.path.join(self._tempdir, self._files.pop(fname))
os.unlink(path)
def getfile(self, fname):
if fname in self._popped:
raise EditingError('trying to get a popped file %s' % fname)
if fname in self._data:
return self._data[fname]
if self._tempdir is None or fname not in self._files:
raise IOError
path = os.path.join(self._tempdir, self._files[fname])
fp = hgutil.posixfile(path, 'rb')
try:
return fp.read()
finally:
fp.close()
def popfile(self, fname):
self.delfile(fname)
self._popped.add(fname)
def files(self):
return list(self._files) + list(self._data)
def close(self):
if self._tempdir is not None:
tempdir, self._tempdir = self._tempdir, None
shutil.rmtree(tempdir)
self._files = None
self._data = None
class RevisionData(object):
__slots__ = [
'file', 'added', 'deleted', 'rev', 'execfiles', 'symlinks',
'copies', 'emptybranches', 'base', 'externals', 'ui',
'exception', 'store',
]
def __init__(self, ui):
self.ui = ui
self.clear()
def clear(self):
oldstore = getattr(self, 'store', None)
if oldstore is not None:
oldstore.close()
self.store = FileStore(util.getfilestoresize(self.ui))
self.added = set()
self.deleted = {}
self.rev = None
self.execfiles = {}
self.symlinks = {}
# Map fully qualified destination file paths to module source path
self.copies = {}
self.emptybranches = {}
self.externals = {}
self.exception = None
def set(self, path, data, isexec=False, islink=False, copypath=None):
self.store.setfile(path, data)
self.execfiles[path] = isexec
self.symlinks[path] = islink
if path in self.deleted:
del self.deleted[path]
if copypath is not None:
self.copies[path] = copypath
def get(self, path):
if path in self.deleted:
raise IOError(errno.ENOENT, '%s is deleted' % path)
data = self.store.getfile(path)
isexec = self.execfiles.get(path)
islink = self.symlinks.get(path)
copied = self.copies.get(path)
return data, isexec, islink, copied
def pop(self, path):
ret = self.get(path)
self.store.popfile(path)
return ret
def delete(self, path):
self.deleted[path] = True
self.store.delfile(path)
self.execfiles[path] = False
self.symlinks[path] = False
self.ui.note('D %s\n' % path)
def files(self):
"""Return a sorted list of changed files."""
files = set(self.store.files())
for g in (self.symlinks, self.execfiles, self.deleted):
files.update(g)
return sorted(files)
def close(self):
self.store.close()
class CopiedFile(object):
def __init__(self, node, path, copypath):
self.node = node
self.path = path
self.copypath = copypath
def resolve(self, getctxfn, ctx=None):
if ctx is None:
ctx = getctxfn(self.node)
fctx = ctx[self.path]
data = fctx.data()
flags = fctx.flags()
islink = 'l' in flags
if islink:
data = 'link ' + data
return data, 'x' in flags, islink, self.copypath
class HgEditor(svnwrap.Editor):
def __init__(self, meta):
self.meta = meta
self.ui = meta.ui
self.repo = meta.repo
self.current = RevisionData(meta.ui)
self._clear()
def setsvn(self, svn):
self._svn = svn
def _clear(self):
self._filecounter = 0
# A mapping of svn paths to CopiedFile entries
self._svncopies = {}
# A mapping of batons to (path, data, isexec, islink, copypath) tuples
# data is a SimpleStringIO if the file was edited, a string
# otherwise.
self._openfiles = {}
# A mapping of file paths to batons
self._openpaths = {}
self._deleted = set()
self._getctx = hgutil.lrucachefunc(self.repo.changectx)
# A map from directory baton to path
self._opendirs = {}
self._missing = set()
def _openfile(self, path, data, isexec, islink, copypath, create=False):
if path in self._openpaths:
raise EditingError('trying to open an already opened file %s'
% path)
if not create and path in self._deleted:
raise EditingError('trying to open a deleted file %s' % path)
if path in self._deleted:
self._deleted.remove(path)
self._filecounter += 1
baton = 'f%d-%s' % (self._filecounter, path)
self._openfiles[baton] = (path, data, isexec, islink, copypath)
self._openpaths[path] = baton
return baton
def _opendir(self, path):
self._filecounter += 1
baton = 'f%d-%s' % (self._filecounter, path)
self._opendirs[baton] = path
return baton
def _checkparentdir(self, baton):
if not self._opendirs or baton not in self._opendirs:
raise EditingError('trying to operate on an already closed '
'directory: %s' % baton)
def _deletefile(self, path):
if self.meta.is_path_valid(path):
self._deleted.add(path)
if path in self._svncopies:
del self._svncopies[path]
self._missing.discard(path)
def addmissing(self, path, isdir=False):
svn = self._svn
root = svn.subdir and svn.subdir[1:] or ''
if not isdir:
self._missing.add(path[len(root):])
else:
# Resolve missing directories content immediately so the
# missing files maybe processed by delete actions.
# we remove the missing directory entries to deal with the case
# where a directory is replaced from e.g. a closed branch
# this will show up as a delete and then a copy
# we process deletes after missing, so we can handle a directory
# copy plus delete of file in that directory. This means that we
# need to be sure that only things whose final disposition is
# deletion remain in self._deleted at the end of the editing process.
rev = self.current.rev.revnum
path = path + '/'
parentdir = path[len(root):]
for f, k in svn.list_files(parentdir, rev):
if k != 'f':
continue
f = parentdir + f
if not self.meta.is_path_valid(f, False):
continue
self._deleted.discard(f)
self._missing.add(f)
@svnwrap.ieditor
def delete_entry(self, path, revision_bogus, parent_baton, pool=None):
self._checkparentdir(parent_baton)
br_path, branch = self.meta.split_branch_path(path)[:2]
if br_path == '':
if self.meta.get_path_tag(path):
# Tag deletion is not handled as branched deletion
return
self.meta.closebranches.add(branch)
# Delete copied entries, no need to check they exist in hg
# parent revision.
if path in self._svncopies:
del self._svncopies[path]
prefix = path + '/'
for f in list(self._svncopies):
if f.startswith(prefix):
self._deletefile(f)
if path in self._missing:
self._missing.remove(path)
else:
for f in list(self._missing):
if f.startswith(prefix):
self._missing.remove(f)
if br_path is not None:
ha = self.meta.get_parent_revision(self.current.rev.revnum, branch)
if ha == revlog.nullid:
return
ctx = self._getctx(ha)
if br_path not in ctx:
br_path2 = ''
if br_path != '':
br_path2 = br_path + '/'
# assuming it is a directory
self.current.externals[path] = None
for f in ctx.walk(util.PrefixMatch(br_path2)):
f_p = '%s/%s' % (path, f[len(br_path2):])
self._deletefile(f_p)
self._deletefile(path)
@svnwrap.ieditor
def open_file(self, path, parent_baton, base_revision, p=None):
self._checkparentdir(parent_baton)
if not self.meta.is_path_valid(path):
return None
fpath, branch = self.meta.split_branch_path(path)[:2]
self.ui.note('M %s\n' % path)
if path in self._svncopies:
copy = self._svncopies.pop(path)
base, isexec, islink, copypath = copy.resolve(self._getctx)
return self._openfile(path, base, isexec, islink, copypath)
baserev = base_revision
if baserev is None or baserev == -1:
baserev = self.current.rev.revnum - 1
# Use exact=True because during replacements ('R' action) we select
# replacing branch as parent, but svn delta editor provides delta
# agains replaced branch.
parent = self.meta.get_parent_revision(baserev + 1, branch, True)
ctx = self._getctx(parent)
if fpath not in ctx:
self.addmissing(path)
return None
fctx = ctx.filectx(fpath)
base = fctx.data()
flags = fctx.flags()
if 'l' in flags:
base = 'link ' + base
return self._openfile(path, base, 'x' in flags, 'l' in flags, None)
@svnwrap.ieditor
def add_file(self, path, parent_baton=None, copyfrom_path=None,
copyfrom_revision=None, file_pool=None):
self._checkparentdir(parent_baton)
# Use existing=False because we use the fact a file is being
# added here to populate the branchmap which is used with
# existing=True.
fpath, branch = self.meta.split_branch_path(path, existing=False)[:2]
if not fpath or fpath not in self.meta.filemap:
return None
if path in self._svncopies:
raise EditingError('trying to replace copied file %s' % path)
if path in self._deleted:
self._deleted.remove(path)
if (branch not in self.meta.branches and
not self.meta.get_path_tag(self.meta.remotename(branch))):
# we know this branch will exist now, because it has at
# least one file. Rock.
self.meta.branches[branch] = None, 0, self.current.rev.revnum
if not copyfrom_path:
self.ui.note('A %s\n' % path)
self.current.added.add(path)
return self._openfile(path, '', False, False, None, create=True)
self.ui.note('A+ %s\n' % path)
(from_file,
from_branch) = self.meta.split_branch_path(copyfrom_path)[:2]
if not from_file:
self.addmissing(path)
return None
# Use exact=True because during replacements ('R' action) we select
# replacing branch as parent, but svn delta editor provides delta
# agains replaced branch.
ha = self.meta.get_parent_revision(copyfrom_revision + 1,
from_branch, True)
ctx = self._getctx(ha)
if from_file not in ctx:
self.addmissing(path)
return None
fctx = ctx.filectx(from_file)
flags = fctx.flags()
base = fctx.data()
if 'l' in flags:
base = 'link ' + base
self.current.set(path, base, 'x' in flags, 'l' in flags)
copypath = None
if from_branch == branch:
parentid = self.meta.get_parent_revision(
self.current.rev.revnum, branch)
if parentid != revlog.nullid:
parentctx = self._getctx(parentid)
if util.issamefile(parentctx, ctx, from_file):
copypath = from_file
return self._openfile(path, base, 'x' in flags, 'l' in flags,
copypath, create=True)
@svnwrap.ieditor
def close_file(self, file_baton, checksum, pool=None):
if file_baton is None:
return
if file_baton not in self._openfiles:
raise EditingError('trying to close a non-open file %s'
% file_baton)
path, data, isexec, islink, copypath = self._openfiles.pop(file_baton)
del self._openpaths[path]
if not isinstance(data, basestring):
# Files can be opened, properties changed and apply_text
# never called, in which case data is still a string.
data = data.getvalue()
self.current.set(path, data, isexec, islink, copypath)
@svnwrap.ieditor
def add_directory(self, path, parent_baton, copyfrom_path,
copyfrom_revision, dir_pool=None):
self._checkparentdir(parent_baton)
baton = self._opendir(path)
br_path, branch = self.meta.split_branch_path(path)[:2]
if br_path is not None:
if not copyfrom_path and not br_path:
# This handles the case where a branch root is
# replaced without copy info. It will show up as a
# deletion and then an add.
self.meta.closebranches.discard(branch)
self.current.emptybranches[branch] = True
else:
self.current.emptybranches[branch] = False
if br_path is None or not copyfrom_path:
return baton
if self.meta.get_path_tag(path):
del self.current.emptybranches[branch]
return baton
tag = self.meta.get_path_tag(copyfrom_path)
if tag not in self.meta.tags:
tag = None
if not self.meta.is_path_valid(copyfrom_path, existing=False):
# The source path only exists at copyfrom_revision, use
# existing=False to guess a possible branch location and
# test it against the filemap. The actual path and
# revision will be resolved below if necessary.
self.addmissing(path, isdir=True)
return baton
if tag:
changeid = self.meta.tags[tag]
source_rev, source_branch = self.meta.get_source_rev(changeid)[:2]
frompath = ''
else:
source_rev = copyfrom_revision
frompath, source_branch = self.meta.split_branch_path(copyfrom_path)[:2]
new_hash = self.meta.get_parent_revision(source_rev + 1, source_branch, True)
if frompath is None or new_hash == node.nullid:
self.addmissing(path, isdir=True)
return baton
fromctx = self._getctx(new_hash)
if frompath != '/' and frompath != '':
frompath = '%s/' % frompath
else:
frompath = ''
copyfromparent = False
if frompath == '' and br_path == '':
pnode = self.meta.get_parent_revision(
self.current.rev.revnum, branch)
if pnode == new_hash:
# Data parent is topological parent and relative paths
# are the same, not need to do anything but restore
# files marked as deleted.
copyfromparent = True
# Get the parent which would have been used for this branch
# without the replace action.
oldpnode = self.meta.get_parent_revision(
self.current.rev.revnum, branch, exact=True)
if (oldpnode != revlog.nullid
and util.isancestor(self._getctx(oldpnode), fromctx)):
# Branch-wide replacement, unmark the branch as deleted
self.meta.closebranches.discard(branch)
svncopies = {}
copies = {}
for f in fromctx:
if not f.startswith(frompath):
continue
dest = path + '/' + f[len(frompath):]
if not self.meta.is_path_valid(dest):
continue
if dest in self._deleted:
self._deleted.remove(dest)
if copyfromparent:
continue
svncopies[dest] = CopiedFile(new_hash, f, None)
if branch == source_branch:
copies[dest] = f
if copies:
# Preserve the directory copy records if no file was changed between
# the source and destination revisions, or discard it completely.
parentid = self.meta.get_parent_revision(
self.current.rev.revnum, branch)
if parentid != revlog.nullid:
parentctx = self._getctx(parentid)
for k, v in copies.iteritems():
if util.issamefile(parentctx, fromctx, v):
svncopies[k].copypath = v
self._svncopies.update(svncopies)
# Copy the externals definitions of copied directories
fromext = svnexternals.parse(self.ui, fromctx)
for p, v in fromext.iteritems():
pp = p and (p + '/') or ''
if pp.startswith(frompath):
dest = (path + '/' + pp[len(frompath):]).rstrip('/')
self.current.externals[dest] = v
return baton
@svnwrap.ieditor
def change_file_prop(self, file_baton, name, value, pool=None):
if file_baton is None:
return
path, data, isexec, islink, copypath = self._openfiles[file_baton]
changed = False
if name == 'svn:executable':
changed = True
isexec = bool(value is not None)
elif name == 'svn:special':
changed = True
islink = bool(value is not None)
if changed:
self._openfiles[file_baton] = (path, data, isexec, islink, copypath)
@svnwrap.ieditor
def change_dir_prop(self, dir_baton, name, value, pool=None):
self._checkparentdir(dir_baton)
if len(self._opendirs) == 1:
return
path = self._opendirs[dir_baton]
if name == 'svn:externals':
self.current.externals[path] = value
@svnwrap.ieditor
def open_root(self, edit_baton, base_revision, dir_pool=None):
# We should not have to reset these, unfortunately the editor is
# reused for different revisions.
self._clear()
return self._opendir('')
@svnwrap.ieditor
def open_directory(self, path, parent_baton, base_revision, dir_pool=None):
self._checkparentdir(parent_baton)
baton = self._opendir(path)
p_, branch = self.meta.split_branch_path(path)[:2]
if p_ == '' or (self.meta.layout == 'single' and p_):
if not self.meta.get_path_tag(path):
self.current.emptybranches[branch] = False
return baton
@svnwrap.ieditor
def close_directory(self, dir_baton, dir_pool=None):
self._checkparentdir(dir_baton)
del self._opendirs[dir_baton]
@svnwrap.ieditor
def apply_textdelta(self, file_baton, base_checksum, pool=None):
if file_baton is None:
return lambda x: None
if file_baton not in self._openfiles:
raise EditingError('trying to patch a closed file %s' % file_baton)
path, base, isexec, islink, copypath = self._openfiles[file_baton]
if not isinstance(base, basestring):
raise EditingError('trying to edit a file again: %s' % path)
if not self.meta.is_path_valid(path):
return lambda x: None
target = svnwrap.SimpleStringIO(closing=False)
self.stream = target
handler = svnwrap.apply_txdelta(base, target)
if not callable(handler): # pragma: no cover
raise hgutil.Abort('Error in Subversion bindings: '
'cannot call handler!')
def txdelt_window(window):
try:
if not self.meta.is_path_valid(path):
return
# are we skipping this branch entirely?
br_path, branch = self.meta.split_branch_path(path)[:2]
if self.meta.skipbranch(branch):
return
try:
handler(window)
except AssertionError, e: # pragma: no cover
# Enhance the exception message
msg, others = e.args[0], e.args[1:]
if msg:
msg += '\n'
msg += _TXDELT_WINDOW_HANDLER_FAILURE_MSG
e.args = (msg,) + others
# re-raising ensures that we show the full stack trace
raise
# window being None means commit this file
if not window:
self._openfiles[file_baton] = (
path, target, isexec, islink, copypath)
except svnwrap.SubversionException, e: # pragma: no cover
self.ui.traceback()
if e.args[1] == svnwrap.ERR_INCOMPLETE_DATA:
self.addmissing(path)
else: # pragma: no cover
raise hgutil.Abort(*e.args)
except: # pragma: no cover
self._exception_info = sys.exc_info()
raise
return txdelt_window
def close(self):
if self._openfiles:
for e in self._openfiles.itervalues():
self.ui.debug('error: %s was not closed\n' % e[0])
raise EditingError('%d edited files were not closed'
% len(self._openfiles))
if self._opendirs:
raise EditingError('directory %s was not closed'
% self._opendirs.keys()[-1])
# Resolve by changelog entries to avoid extra reads
nodes = {}
for path, copy in self._svncopies.iteritems():
nodes.setdefault(copy.node, []).append((path, copy))
for node, copies in nodes.iteritems():
for path, copy in copies:
data, isexec, islink, copied = copy.resolve(self._getctx)
self.current.set(path, data, isexec, islink, copied)
self._svncopies.clear()
# Resolve missing files
if self._missing:
missing = sorted(self._missing)
self.ui.debug('fetching %s files that could not use replay.\n'
% len(missing))
if self.ui.configbool('hgsubversion', 'failonmissing', False):
raise EditingError('missing entry: %s' % missing[0])
svn = self._svn
rev = self.current.rev.revnum
root = svn.subdir and svn.subdir[1:] or ''
i = 1
for f in missing:
if self.ui.debugflag:
self.ui.debug('fetching %s\n' % f)
else:
self.ui.note('.')
self.ui.flush()
if i % 50 == 0:
svn.init_ra_and_client()
i += 1
data, mode = svn.get_file(f, rev)
self.current.set(root + f, data, 'x' in mode, 'l' in mode)
if not self.ui.debugflag:
self.ui.note('\n')
for f in self._deleted:
self.current.delete(f)
self._deleted.clear()
_TXDELT_WINDOW_HANDLER_FAILURE_MSG = (
"Your SVN repository may not be supplying correct replay deltas."
" It is strongly"
"\nadvised that you repull the entire SVN repository using"
" hg pull --stupid."
"\nAlternatively, re-pull just this revision using --stupid and verify"
" that the"
"\nchangeset is correct."
)