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Differential D6836

interfaces: introduce an interface for dirstate implementations
ClosedPublic

Authored by durin42 on Sep 10 2019, 10:01 AM.

Details

Reviewers
indygreg
pulkit
Group Reviewers
hg-reviewers
Commits
rHGd459cd8ea42d: interfaces: introduce an interface for dirstate implementations
Summary

As usual with adding interface definitions, this describes the way
things are, not the way we'd like things to be. There are some clear
problems in the interface right now (eg ._map leaks in a few places),
but I have plans to clean those up. There are also many missing
docstrings, but again, we'll make a second pass to clean that up.

Diff Detail

Repository
rHG Mercurial
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

durin42 created this revision.Sep 10 2019, 10:01 AM
indygreg accepted this revision.Sep 11 2019, 10:47 PM
This revision is now accepted and ready to land.Sep 11 2019, 10:47 PM
Alphare added a subscriber: Alphare.Sep 13 2019, 4:41 AM
Alphare added inline comments.
mercurial/interfaces/dirstate.py
38

Shouldn't this be removed?

pulkit accepted this revision.Sep 14 2019, 11:11 AM

Revision Contents
Changeset List

Diff 16537

mercurial/dirstate.py

pathutil, pathutil,
policy, policy,
pycompat, pycompat,
scmutil, scmutil,
txnutil, txnutil,
util, util,
) )
from .interfaces import (
dirstate as intdirstate,
util as interfaceutil,
)
parsers = policy.importmod(r'parsers') parsers = policy.importmod(r'parsers')
rustmod = policy.importrust(r'dirstate') rustmod = policy.importrust(r'dirstate')
propertycache = util.propertycache propertycache = util.propertycache
filecache = scmutil.filecache filecache = scmutil.filecache
_rangemask = 0x7fffffff _rangemask = 0x7fffffff
dirstatetuple = parsers.dirstatetuple dirstatetuple = parsers.dirstatetuple
'''Get "now" timestamp on filesystem''' '''Get "now" timestamp on filesystem'''
tmpfd, tmpname = vfs.mkstemp() tmpfd, tmpname = vfs.mkstemp()
try: try:
return os.fstat(tmpfd)[stat.ST_MTIME] return os.fstat(tmpfd)[stat.ST_MTIME]
finally: finally:
os.close(tmpfd) os.close(tmpfd)
vfs.unlink(tmpname) vfs.unlink(tmpname)
@interfaceutil.implementer(intdirstate.idirstate)
class dirstate(object): class dirstate(object):
def __init__(self, opener, ui, root, validate, sparsematchfn): def __init__(self, opener, ui, root, validate, sparsematchfn):
'''Create a new dirstate object. '''Create a new dirstate object.
opener is an open()-like callable that can be used to open the opener is an open()-like callable that can be used to open the
dirstate file; root is the root of the directory tracked by dirstate file; root is the root of the directory tracked by
the dirstate. the dirstate.

mercurial/interfaces/dirstate.py

  • This file was added.
from __future__ import absolute_import, print_function
import contextlib
from .. import (
node as nodemod,
)
from . import (
util as interfaceutil,
)
class idirstate(interfaceutil.Interface):
def __init__(opener, ui, root, validate, sparsematchfn):
'''Create a new dirstate object.
opener is an open()-like callable that can be used to open the
dirstate file; root is the root of the directory tracked by
the dirstate.
'''
@contextlib.contextmanager
def parentchange():
'''Context manager for handling dirstate parents.
If an exception occurs in the scope of the context manager,
the incoherent dirstate won't be written when wlock is
released.
'''
def pendingparentchange():
'''Returns true if the dirstate is in the middle of a set of changes
that modify the dirstate parent.
'''
_map = interfaceutil.Attribute(
"""Return the dirstate contents (see documentation for dirstatemap).
AlphareUnsubmitted
Not Done

Shouldn't this be removed?

Alphare: Shouldn't this be removed?
TODO this should not be exposed.
"""
)
def hasdir(d):
pass
_ignore = interfaceutil.Attribute('Matcher for ignored files.')
_checklink = interfaceutil.Attribute('Callable for checking symlinks.')
_checkexec = interfaceutil.Attribute('Callable for checking exec bits.')
def flagfunc(buildfallback):
pass
def getcwd():
'''Return the path from which a canonical path is calculated.
This path should be used to resolve file patterns or to convert
canonical paths back to file paths for display. It shouldn't be
used to get real file paths. Use vfs functions instead.
'''
def pathto(f, cwd=None):
pass
def __getitem__(key):
'''Return the current state of key (a filename) in the dirstate.
States are:
n normal
m needs merging
r marked for removal
a marked for addition
? not tracked
'''
def __contains__(key):
"""Check if bytestring `key` is known to the dirstate."""
def __iter__():
"""Iterate the dirstate's contained filenames as bytestrings."""
def items():
"""Iterate the dirstate's entries as (filename, dirstatetuple).
As usual, filename is a bytestring.
"""
iteritems = items
def parents():
pass
def p1():
pass
def p2():
pass
def branch():
pass
def setparents(p1, p2=nodemod.nullid):
"""Set dirstate parents to p1 and p2.
When moving from two parents to one, 'm' merged entries a
adjusted to normal and previous copy records discarded and
returned by the call.
See localrepo.setparents()
"""
def setbranch(branch):
pass
def invalidate():
'''Causes the next access to reread the dirstate.
This is different from localrepo.invalidatedirstate() because it always
rereads the dirstate. Use localrepo.invalidatedirstate() if you want to
check whether the dirstate has changed before rereading it.'''
def copy(source, dest):
"""Mark dest as a copy of source. Unmark dest if source is None."""
def copied(file):
pass
def copies():
pass
def normal(f, parentfiledata=None):
'''Mark a file normal and clean.
parentfiledata: (mode, size, mtime) of the clean file
parentfiledata should be computed from memory (for mode,
size), as or close as possible from the point where we
determined the file was clean, to limit the risk of the
file having been changed by an external process between the
moment where the file was determined to be clean and now.'''
pass
def normallookup(f):
'''Mark a file normal, but possibly dirty.'''
def otherparent(f):
'''Mark as coming from the other parent, always dirty.'''
def add(f):
'''Mark a file added.'''
def remove(f):
'''Mark a file removed.'''
def merge(f):
'''Mark a file merged.'''
def drop(f):
'''Drop a file from the dirstate'''
def normalize(path, isknown=False, ignoremissing=False):
'''
normalize the case of a pathname when on a casefolding filesystem
isknown specifies whether the filename came from walking the
disk, to avoid extra filesystem access.
If ignoremissing is True, missing path are returned
unchanged. Otherwise, we try harder to normalize possibly
existing path components.
The normalized case is determined based on the following precedence:
- version of name already stored in the dirstate
- version of name stored on disk
- version provided via command arguments
'''
def clear():
pass
def rebuild(parent, allfiles, changedfiles=None):
pass
def identity():
'''Return identity of dirstate it to detect changing in storage
If identity of previous dirstate is equal to this, writing
changes based on the former dirstate out can keep consistency.
'''
def write(tr):
pass
def addparentchangecallback(category, callback):
"""add a callback to be called when the wd parents are changed
Callback will be called with the following arguments:
dirstate, (oldp1, oldp2), (newp1, newp2)
Category is a unique identifier to allow overwriting an old callback
with a newer callback.
"""
def _ignorefiles():
"""Return a list of files containing patterns to ignore.
TODO this should not be exposed."""
def _ignorefileandline(f):
"""Given a file `f`, return the ignore file and line that ignores it.
TODO this should not be exposed."""
def walk(match, subrepos, unknown, ignored, full=True):
'''
Walk recursively through the directory tree, finding all files
matched by match.
If full is False, maybe skip some known-clean files.
Return a dict mapping filename to stat-like object (either
mercurial.osutil.stat instance or return value of os.stat()).
'''
def status(match, subrepos, ignored, clean, unknown):
'''Determine the status of the working copy relative to the
dirstate and return a pair of (unsure, status), where status is of type
scmutil.status and:
unsure:
files that might have been modified since the dirstate was
written, but need to be read to be sure (size is the same
but mtime differs)
status.modified:
files that have definitely been modified since the dirstate
was written (different size or mode)
status.clean:
files that have definitely not been modified since the
dirstate was written
'''
def matches(match):
'''
return files in the dirstate (in whatever state) filtered by match
'''
def savebackup(tr, backupname):
'''Save current dirstate into backup file'''
def restorebackup(tr, backupname):
'''Restore dirstate by backup file'''
def clearbackup(tr, backupname):
'''Clear backup file'''

tests/test-check-interfaces.py

import sys import sys
# Only run if tests are run in a repo # Only run if tests are run in a repo
if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'], if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'],
'test-repo']): 'test-repo']):
sys.exit(80) sys.exit(80)
from mercurial.interfaces import ( from mercurial.interfaces import (
dirstate as intdirstate,
repository, repository,
) )
from mercurial.thirdparty.zope import ( from mercurial.thirdparty.zope import (
interface as zi, interface as zi,
) )
from mercurial.thirdparty.zope.interface import ( from mercurial.thirdparty.zope.interface import (
verify as ziverify, verify as ziverify,
) )
from mercurial import ( from mercurial import (
bundlerepo, bundlerepo,
dirstate,
filelog, filelog,
httppeer, httppeer,
localrepo, localrepo,
manifest, manifest,
pycompat, pycompat,
revlog, revlog,
sshpeer, sshpeer,
statichttprepo, statichttprepo,
ziverify.verifyClass(repository.imanifeststorage, manifest.manifestrevlog) ziverify.verifyClass(repository.imanifeststorage, manifest.manifestrevlog)
ziverify.verifyClass(repository.irevisiondelta, ziverify.verifyClass(repository.irevisiondelta,
simplestorerepo.simplestorerevisiondelta) simplestorerepo.simplestorerevisiondelta)
ziverify.verifyClass(repository.ifilestorage, simplestorerepo.filestorage) ziverify.verifyClass(repository.ifilestorage, simplestorerepo.filestorage)
ziverify.verifyClass(repository.iverifyproblem, ziverify.verifyClass(repository.iverifyproblem,
simplestorerepo.simplefilestoreproblem) simplestorerepo.simplefilestoreproblem)
ziverify.verifyClass(intdirstate.idirstate, dirstate.dirstate)
vfs = vfsmod.vfs(b'.') vfs = vfsmod.vfs(b'.')
fl = filelog.filelog(vfs, b'dummy.i') fl = filelog.filelog(vfs, b'dummy.i')
checkzobject(fl, allowextra=True) checkzobject(fl, allowextra=True)
# Conforms to imanifestlog. # Conforms to imanifestlog.
ml = manifest.manifestlog(vfs, repo, manifest.manifestrevlog(repo.svfs), ml = manifest.manifestlog(vfs, repo, manifest.manifestrevlog(repo.svfs),
repo.narrowmatch()) repo.narrowmatch())
checkzobject(ml) checkzobject(ml)