# scmutil.py - Mercurial core utility functions # # Copyright Matt Mackall # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import errno import glob import hashlib import os import re import socket import weakref from .i18n import _ from .node import ( hex, nullid, wdirid, wdirrev, ) from .i18n import _ from . import ( encoding, error, match as matchmod, obsolete, obsutil, pathutil, phases, pycompat, revsetlang, similar, util, ) if pycompat.osname == 'nt': from . import scmwindows as scmplatform else: from . import scmposix as scmplatform termsize = scmplatform.termsize class status(tuple): '''Named tuple with a list of files per status. The 'deleted', 'unknown' and 'ignored' properties are only relevant to the working copy. ''' __slots__ = () def __new__(cls, modified, added, removed, deleted, unknown, ignored, clean): return tuple.__new__(cls, (modified, added, removed, deleted, unknown, ignored, clean)) @property def modified(self): '''files that have been modified''' return self[0] @property def added(self): '''files that have been added''' return self[1] @property def removed(self): '''files that have been removed''' return self[2] @property def deleted(self): '''files that are in the dirstate, but have been deleted from the working copy (aka "missing") ''' return self[3] @property def unknown(self): '''files not in the dirstate that are not ignored''' return self[4] @property def ignored(self): '''files not in the dirstate that are ignored (by _dirignore())''' return self[5] @property def clean(self): '''files that have not been modified''' return self[6] def __repr__(self, *args, **kwargs): return (('') % self) def itersubrepos(ctx1, ctx2): """find subrepos in ctx1 or ctx2""" # Create a (subpath, ctx) mapping where we prefer subpaths from # ctx1. The subpaths from ctx2 are important when the .hgsub file # has been modified (in ctx2) but not yet committed (in ctx1). subpaths = dict.fromkeys(ctx2.substate, ctx2) subpaths.update(dict.fromkeys(ctx1.substate, ctx1)) missing = set() for subpath in ctx2.substate: if subpath not in ctx1.substate: del subpaths[subpath] missing.add(subpath) for subpath, ctx in sorted(subpaths.iteritems()): yield subpath, ctx.sub(subpath) # Yield an empty subrepo based on ctx1 for anything only in ctx2. That way, # status and diff will have an accurate result when it does # 'sub.{status|diff}(rev2)'. Otherwise, the ctx2 subrepo is compared # against itself. for subpath in missing: yield subpath, ctx2.nullsub(subpath, ctx1) def nochangesfound(ui, repo, excluded=None): '''Report no changes for push/pull, excluded is None or a list of nodes excluded from the push/pull. ''' secretlist = [] if excluded: for n in excluded: ctx = repo[n] if ctx.phase() >= phases.secret and not ctx.extinct(): secretlist.append(n) if secretlist: ui.status(_("no changes found (ignored %d secret changesets)\n") % len(secretlist)) else: ui.status(_("no changes found\n")) def callcatch(ui, func): """call func() with global exception handling return func() if no exception happens. otherwise do some error handling and return an exit code accordingly. does not handle all exceptions. """ try: try: return func() except: # re-raises ui.traceback() raise # Global exception handling, alphabetically # Mercurial-specific first, followed by built-in and library exceptions except error.LockHeld as inst: if inst.errno == errno.ETIMEDOUT: reason = _('timed out waiting for lock held by %r') % inst.locker else: reason = _('lock held by %r') % inst.locker ui.warn(_("abort: %s: %s\n") % (inst.desc or inst.filename, reason)) if not inst.locker: ui.warn(_("(lock might be very busy)\n")) except error.LockUnavailable as inst: ui.warn(_("abort: could not lock %s: %s\n") % (inst.desc or inst.filename, inst.strerror)) except error.OutOfBandError as inst: if inst.args: msg = _("abort: remote error:\n") else: msg = _("abort: remote error\n") ui.warn(msg) if inst.args: ui.warn(''.join(inst.args)) if inst.hint: ui.warn('(%s)\n' % inst.hint) except error.RepoError as inst: ui.warn(_("abort: %s!\n") % inst) if inst.hint: ui.warn(_("(%s)\n") % inst.hint) except error.ResponseError as inst: ui.warn(_("abort: %s") % inst.args[0]) if not isinstance(inst.args[1], basestring): ui.warn(" %r\n" % (inst.args[1],)) elif not inst.args[1]: ui.warn(_(" empty string\n")) else: ui.warn("\n%r\n" % util.ellipsis(inst.args[1])) except error.CensoredNodeError as inst: ui.warn(_("abort: file censored %s!\n") % inst) except error.RevlogError as inst: ui.warn(_("abort: %s!\n") % inst) except error.InterventionRequired as inst: ui.warn("%s\n" % inst) if inst.hint: ui.warn(_("(%s)\n") % inst.hint) return 1 except error.WdirUnsupported: ui.warn(_("abort: working directory revision cannot be specified\n")) except error.Abort as inst: ui.warn(_("abort: %s\n") % inst) if inst.hint: ui.warn(_("(%s)\n") % inst.hint) except ImportError as inst: ui.warn(_("abort: %s!\n") % inst) m = str(inst).split()[-1] if m in "mpatch bdiff".split(): ui.warn(_("(did you forget to compile extensions?)\n")) elif m in "zlib".split(): ui.warn(_("(is your Python install correct?)\n")) except IOError as inst: if util.safehasattr(inst, "code"): ui.warn(_("abort: %s\n") % inst) elif util.safehasattr(inst, "reason"): try: # usually it is in the form (errno, strerror) reason = inst.reason.args[1] except (AttributeError, IndexError): # it might be anything, for example a string reason = inst.reason if isinstance(reason, unicode): # SSLError of Python 2.7.9 contains a unicode reason = encoding.unitolocal(reason) ui.warn(_("abort: error: %s\n") % reason) elif (util.safehasattr(inst, "args") and inst.args and inst.args[0] == errno.EPIPE): pass elif getattr(inst, "strerror", None): if getattr(inst, "filename", None): ui.warn(_("abort: %s: %s\n") % (inst.strerror, inst.filename)) else: ui.warn(_("abort: %s\n") % inst.strerror) else: raise except OSError as inst: if getattr(inst, "filename", None) is not None: ui.warn(_("abort: %s: '%s'\n") % (inst.strerror, inst.filename)) else: ui.warn(_("abort: %s\n") % inst.strerror) except MemoryError: ui.warn(_("abort: out of memory\n")) except SystemExit as inst: # Commands shouldn't sys.exit directly, but give a return code. # Just in case catch this and and pass exit code to caller. return inst.code except socket.error as inst: ui.warn(_("abort: %s\n") % inst.args[-1]) return -1 def checknewlabel(repo, lbl, kind): # Do not use the "kind" parameter in ui output. # It makes strings difficult to translate. if lbl in ['tip', '.', 'null']: raise error.Abort(_("the name '%s' is reserved") % lbl) for c in (':', '\0', '\n', '\r'): if c in lbl: raise error.Abort(_("%r cannot be used in a name") % c) try: int(lbl) raise error.Abort(_("cannot use an integer as a name")) except ValueError: pass def checkfilename(f): '''Check that the filename f is an acceptable filename for a tracked file''' if '\r' in f or '\n' in f: raise error.Abort(_("'\\n' and '\\r' disallowed in filenames: %r") % f) def checkportable(ui, f): '''Check if filename f is portable and warn or abort depending on config''' checkfilename(f) abort, warn = checkportabilityalert(ui) if abort or warn: msg = util.checkwinfilename(f) if msg: msg = "%s: %r" % (msg, f) if abort: raise error.Abort(msg) ui.warn(_("warning: %s\n") % msg) def checkportabilityalert(ui): '''check if the user's config requests nothing, a warning, or abort for non-portable filenames''' val = ui.config('ui', 'portablefilenames', 'warn') lval = val.lower() bval = util.parsebool(val) abort = pycompat.osname == 'nt' or lval == 'abort' warn = bval or lval == 'warn' if bval is None and not (warn or abort or lval == 'ignore'): raise error.ConfigError( _("ui.portablefilenames value is invalid ('%s')") % val) return abort, warn class casecollisionauditor(object): def __init__(self, ui, abort, dirstate): self._ui = ui self._abort = abort allfiles = '\0'.join(dirstate._map) self._loweredfiles = set(encoding.lower(allfiles).split('\0')) self._dirstate = dirstate # The purpose of _newfiles is so that we don't complain about # case collisions if someone were to call this object with the # same filename twice. self._newfiles = set() def __call__(self, f): if f in self._newfiles: return fl = encoding.lower(f) if fl in self._loweredfiles and f not in self._dirstate: msg = _('possible case-folding collision for %s') % f if self._abort: raise error.Abort(msg) self._ui.warn(_("warning: %s\n") % msg) self._loweredfiles.add(fl) self._newfiles.add(f) def filteredhash(repo, maxrev): """build hash of filtered revisions in the current repoview. Multiple caches perform up-to-date validation by checking that the tiprev and tipnode stored in the cache file match the current repository. However, this is not sufficient for validating repoviews because the set of revisions in the view may change without the repository tiprev and tipnode changing. This function hashes all the revs filtered from the view and returns that SHA-1 digest. """ cl = repo.changelog if not cl.filteredrevs: return None key = None revs = sorted(r for r in cl.filteredrevs if r <= maxrev) if revs: s = hashlib.sha1() for rev in revs: s.update('%d;' % rev) key = s.digest() return key def walkrepos(path, followsym=False, seen_dirs=None, recurse=False): '''yield every hg repository under path, always recursively. The recurse flag will only control recursion into repo working dirs''' def errhandler(err): if err.filename == path: raise err samestat = getattr(os.path, 'samestat', None) if followsym and samestat is not None: def adddir(dirlst, dirname): match = False dirstat = os.stat(dirname) for lstdirstat in dirlst: if samestat(dirstat, lstdirstat): match = True break if not match: dirlst.append(dirstat) return not match else: followsym = False if (seen_dirs is None) and followsym: seen_dirs = [] adddir(seen_dirs, path) for root, dirs, files in os.walk(path, topdown=True, onerror=errhandler): dirs.sort() if '.hg' in dirs: yield root # found a repository qroot = os.path.join(root, '.hg', 'patches') if os.path.isdir(os.path.join(qroot, '.hg')): yield qroot # we have a patch queue repo here if recurse: # avoid recursing inside the .hg directory dirs.remove('.hg') else: dirs[:] = [] # don't descend further elif followsym: newdirs = [] for d in dirs: fname = os.path.join(root, d) if adddir(seen_dirs, fname): if os.path.islink(fname): for hgname in walkrepos(fname, True, seen_dirs): yield hgname else: newdirs.append(d) dirs[:] = newdirs def binnode(ctx): """Return binary node id for a given basectx""" node = ctx.node() if node is None: return wdirid return node def intrev(ctx): """Return integer for a given basectx that can be used in comparison or arithmetic operation""" rev = ctx.rev() if rev is None: return wdirrev return rev def revsingle(repo, revspec, default='.'): if not revspec and revspec != 0: return repo[default] l = revrange(repo, [revspec]) if not l: raise error.Abort(_('empty revision set')) return repo[l.last()] def _pairspec(revspec): tree = revsetlang.parse(revspec) return tree and tree[0] in ('range', 'rangepre', 'rangepost', 'rangeall') def revpair(repo, revs): if not revs: return repo.dirstate.p1(), None l = revrange(repo, revs) if not l: first = second = None elif l.isascending(): first = l.min() second = l.max() elif l.isdescending(): first = l.max() second = l.min() else: first = l.first() second = l.last() if first is None: raise error.Abort(_('empty revision range')) if (first == second and len(revs) >= 2 and not all(revrange(repo, [r]) for r in revs)): raise error.Abort(_('empty revision on one side of range')) # if top-level is range expression, the result must always be a pair if first == second and len(revs) == 1 and not _pairspec(revs[0]): return repo.lookup(first), None return repo.lookup(first), repo.lookup(second) def revrange(repo, specs): """Execute 1 to many revsets and return the union. This is the preferred mechanism for executing revsets using user-specified config options, such as revset aliases. The revsets specified by ``specs`` will be executed via a chained ``OR`` expression. If ``specs`` is empty, an empty result is returned. ``specs`` can contain integers, in which case they are assumed to be revision numbers. It is assumed the revsets are already formatted. If you have arguments that need to be expanded in the revset, call ``revsetlang.formatspec()`` and pass the result as an element of ``specs``. Specifying a single revset is allowed. Returns a ``revset.abstractsmartset`` which is a list-like interface over integer revisions. """ allspecs = [] for spec in specs: if isinstance(spec, int): spec = revsetlang.formatspec('rev(%d)', spec) allspecs.append(spec) return repo.anyrevs(allspecs, user=True) def meaningfulparents(repo, ctx): """Return list of meaningful (or all if debug) parentrevs for rev. For merges (two non-nullrev revisions) both parents are meaningful. Otherwise the first parent revision is considered meaningful if it is not the preceding revision. """ parents = ctx.parents() if len(parents) > 1: return parents if repo.ui.debugflag: return [parents[0], repo['null']] if parents[0].rev() >= intrev(ctx) - 1: return [] return parents def expandpats(pats): '''Expand bare globs when running on windows. On posix we assume it already has already been done by sh.''' if not util.expandglobs: return list(pats) ret = [] for kindpat in pats: kind, pat = matchmod._patsplit(kindpat, None) if kind is None: try: globbed = glob.glob(pat) except re.error: globbed = [pat] if globbed: ret.extend(globbed) continue ret.append(kindpat) return ret def matchandpats(ctx, pats=(), opts=None, globbed=False, default='relpath', badfn=None): '''Return a matcher and the patterns that were used. The matcher will warn about bad matches, unless an alternate badfn callback is provided.''' if pats == ("",): pats = [] if opts is None: opts = {} if not globbed and default == 'relpath': pats = expandpats(pats or []) def bad(f, msg): ctx.repo().ui.warn("%s: %s\n" % (m.rel(f), msg)) if badfn is None: badfn = bad m = ctx.match(pats, opts.get('include'), opts.get('exclude'), default, listsubrepos=opts.get('subrepos'), badfn=badfn) if m.always(): pats = [] return m, pats def match(ctx, pats=(), opts=None, globbed=False, default='relpath', badfn=None): '''Return a matcher that will warn about bad matches.''' return matchandpats(ctx, pats, opts, globbed, default, badfn=badfn)[0] def matchall(repo): '''Return a matcher that will efficiently match everything.''' return matchmod.always(repo.root, repo.getcwd()) def matchfiles(repo, files, badfn=None): '''Return a matcher that will efficiently match exactly these files.''' return matchmod.exact(repo.root, repo.getcwd(), files, badfn=badfn) def origpath(ui, repo, filepath): '''customize where .orig files are created Fetch user defined path from config file: [ui] origbackuppath = Fall back to default (filepath) if not specified ''' origbackuppath = ui.config('ui', 'origbackuppath', None) if origbackuppath is None: return filepath + ".orig" filepathfromroot = os.path.relpath(filepath, start=repo.root) fullorigpath = repo.wjoin(origbackuppath, filepathfromroot) origbackupdir = repo.vfs.dirname(fullorigpath) if not repo.vfs.exists(origbackupdir): ui.note(_('creating directory: %s\n') % origbackupdir) util.makedirs(origbackupdir) return fullorigpath + ".orig" class _containsnode(object): """proxy __contains__(node) to container.__contains__ which accepts revs""" def __init__(self, repo, revcontainer): self._torev = repo.changelog.rev self._revcontains = revcontainer.__contains__ def __contains__(self, node): return self._revcontains(self._torev(node)) def cleanupnodes(repo, mapping, operation): """do common cleanups when old nodes are replaced by new nodes That includes writing obsmarkers or stripping nodes, and moving bookmarks. (we might also want to move working directory parent in the future) mapping is {oldnode: [newnode]} or a iterable of nodes if they do not have replacements. operation is a string, like "rebase". """ if not util.safehasattr(mapping, 'items'): mapping = {n: () for n in mapping} with repo.transaction('cleanup') as tr: # Move bookmarks bmarks = repo._bookmarks bmarkchanged = False allnewnodes = [n for ns in mapping.values() for n in ns] for oldnode, newnodes in mapping.items(): oldbmarks = repo.nodebookmarks(oldnode) if not oldbmarks: continue from . import bookmarks # avoid import cycle bmarkchanged = True if len(newnodes) > 1: # usually a split, take the one with biggest rev number newnode = next(repo.set('max(%ln)', newnodes)).node() elif len(newnodes) == 0: # move bookmark backwards roots = list(repo.set('max((::%n) - %ln)', oldnode, list(mapping))) if roots: newnode = roots[0].node() else: newnode = nullid else: newnode = newnodes[0] repo.ui.debug('moving bookmarks %r from %s to %s\n' % (oldbmarks, hex(oldnode), hex(newnode))) # Delete divergent bookmarks being parents of related newnodes deleterevs = repo.revs('parents(roots(%ln & (::%n))) - parents(%n)', allnewnodes, newnode, oldnode) deletenodes = _containsnode(repo, deleterevs) for name in oldbmarks: bmarks[name] = newnode bookmarks.deletedivergent(repo, deletenodes, name) if bmarkchanged: bmarks.recordchange(tr) # Obsolete or strip nodes if obsolete.isenabled(repo, obsolete.createmarkersopt): # If a node is already obsoleted, and we want to obsolete it # without a successor, skip that obssolete request since it's # unnecessary. That's the "if s or not isobs(n)" check below. # Also sort the node in topology order, that might be useful for # some obsstore logic. # NOTE: the filtering and sorting might belong to createmarkers. # Unfiltered repo is needed since nodes in mapping might be hidden. unfi = repo.unfiltered() isobs = unfi.obsstore.successors.__contains__ torev = unfi.changelog.rev sortfunc = lambda ns: torev(ns[0]) rels = [(unfi[n], (unfi[m] for m in s)) for n, s in sorted(mapping.items(), key=sortfunc) if s or not isobs(n)] obsolete.createmarkers(repo, rels, operation=operation) else: from . import repair # avoid import cycle repair.delayedstrip(repo.ui, repo, list(mapping), operation) def addremove(repo, matcher, prefix, opts=None, dry_run=None, similarity=None): if opts is None: opts = {} m = matcher if dry_run is None: dry_run = opts.get('dry_run') if similarity is None: similarity = float(opts.get('similarity') or 0) ret = 0 join = lambda f: os.path.join(prefix, f) wctx = repo[None] for subpath in sorted(wctx.substate): submatch = matchmod.subdirmatcher(subpath, m) if opts.get('subrepos') or m.exact(subpath) or any(submatch.files()): sub = wctx.sub(subpath) try: if sub.addremove(submatch, prefix, opts, dry_run, similarity): ret = 1 except error.LookupError: repo.ui.status(_("skipping missing subrepository: %s\n") % join(subpath)) rejected = [] def badfn(f, msg): if f in m.files(): m.bad(f, msg) rejected.append(f) badmatch = matchmod.badmatch(m, badfn) added, unknown, deleted, removed, forgotten = _interestingfiles(repo, badmatch) unknownset = set(unknown + forgotten) toprint = unknownset.copy() toprint.update(deleted) for abs in sorted(toprint): if repo.ui.verbose or not m.exact(abs): if abs in unknownset: status = _('adding %s\n') % m.uipath(abs) else: status = _('removing %s\n') % m.uipath(abs) repo.ui.status(status) renames = _findrenames(repo, m, added + unknown, removed + deleted, similarity) if not dry_run: _markchanges(repo, unknown + forgotten, deleted, renames) for f in rejected: if f in m.files(): return 1 return ret def marktouched(repo, files, similarity=0.0): '''Assert that files have somehow been operated upon. files are relative to the repo root.''' m = matchfiles(repo, files, badfn=lambda x, y: rejected.append(x)) rejected = [] added, unknown, deleted, removed, forgotten = _interestingfiles(repo, m) if repo.ui.verbose: unknownset = set(unknown + forgotten) toprint = unknownset.copy() toprint.update(deleted) for abs in sorted(toprint): if abs in unknownset: status = _('adding %s\n') % abs else: status = _('removing %s\n') % abs repo.ui.status(status) renames = _findrenames(repo, m, added + unknown, removed + deleted, similarity) _markchanges(repo, unknown + forgotten, deleted, renames) for f in rejected: if f in m.files(): return 1 return 0 def _interestingfiles(repo, matcher): '''Walk dirstate with matcher, looking for files that addremove would care about. This is different from dirstate.status because it doesn't care about whether files are modified or clean.''' added, unknown, deleted, removed, forgotten = [], [], [], [], [] audit_path = pathutil.pathauditor(repo.root) ctx = repo[None] dirstate = repo.dirstate walkresults = dirstate.walk(matcher, sorted(ctx.substate), True, False, full=False) for abs, st in walkresults.iteritems(): dstate = dirstate[abs] if dstate == '?' and audit_path.check(abs): unknown.append(abs) elif dstate != 'r' and not st: deleted.append(abs) elif dstate == 'r' and st: forgotten.append(abs) # for finding renames elif dstate == 'r' and not st: removed.append(abs) elif dstate == 'a': added.append(abs) return added, unknown, deleted, removed, forgotten def _findrenames(repo, matcher, added, removed, similarity): '''Find renames from removed files to added ones.''' renames = {} if similarity > 0: for old, new, score in similar.findrenames(repo, added, removed, similarity): if (repo.ui.verbose or not matcher.exact(old) or not matcher.exact(new)): repo.ui.status(_('recording removal of %s as rename to %s ' '(%d%% similar)\n') % (matcher.rel(old), matcher.rel(new), score * 100)) renames[new] = old return renames def _markchanges(repo, unknown, deleted, renames): '''Marks the files in unknown as added, the files in deleted as removed, and the files in renames as copied.''' wctx = repo[None] with repo.wlock(): wctx.forget(deleted) wctx.add(unknown) for new, old in renames.iteritems(): wctx.copy(old, new) def dirstatecopy(ui, repo, wctx, src, dst, dryrun=False, cwd=None): """Update the dirstate to reflect the intent of copying src to dst. For different reasons it might not end with dst being marked as copied from src. """ origsrc = repo.dirstate.copied(src) or src if dst == origsrc: # copying back a copy? if repo.dirstate[dst] not in 'mn' and not dryrun: repo.dirstate.normallookup(dst) else: if repo.dirstate[origsrc] == 'a' and origsrc == src: if not ui.quiet: ui.warn(_("%s has not been committed yet, so no copy " "data will be stored for %s.\n") % (repo.pathto(origsrc, cwd), repo.pathto(dst, cwd))) if repo.dirstate[dst] in '?r' and not dryrun: wctx.add([dst]) elif not dryrun: wctx.copy(origsrc, dst) def readrequires(opener, supported): '''Reads and parses .hg/requires and checks if all entries found are in the list of supported features.''' requirements = set(opener.read("requires").splitlines()) missings = [] for r in requirements: if r not in supported: if not r or not r[0].isalnum(): raise error.RequirementError(_(".hg/requires file is corrupt")) missings.append(r) missings.sort() if missings: raise error.RequirementError( _("repository requires features unknown to this Mercurial: %s") % " ".join(missings), hint=_("see https://mercurial-scm.org/wiki/MissingRequirement" " for more information")) return requirements def writerequires(opener, requirements): with opener('requires', 'w') as fp: for r in sorted(requirements): fp.write("%s\n" % r) class filecachesubentry(object): def __init__(self, path, stat): self.path = path self.cachestat = None self._cacheable = None if stat: self.cachestat = filecachesubentry.stat(self.path) if self.cachestat: self._cacheable = self.cachestat.cacheable() else: # None means we don't know yet self._cacheable = None def refresh(self): if self.cacheable(): self.cachestat = filecachesubentry.stat(self.path) def cacheable(self): if self._cacheable is not None: return self._cacheable # we don't know yet, assume it is for now return True def changed(self): # no point in going further if we can't cache it if not self.cacheable(): return True newstat = filecachesubentry.stat(self.path) # we may not know if it's cacheable yet, check again now if newstat and self._cacheable is None: self._cacheable = newstat.cacheable() # check again if not self._cacheable: return True if self.cachestat != newstat: self.cachestat = newstat return True else: return False @staticmethod def stat(path): try: return util.cachestat(path) except OSError as e: if e.errno != errno.ENOENT: raise class filecacheentry(object): def __init__(self, paths, stat=True): self._entries = [] for path in paths: self._entries.append(filecachesubentry(path, stat)) def changed(self): '''true if any entry has changed''' for entry in self._entries: if entry.changed(): return True return False def refresh(self): for entry in self._entries: entry.refresh() class filecache(object): '''A property like decorator that tracks files under .hg/ for updates. Records stat info when called in _filecache. On subsequent calls, compares old stat info with new info, and recreates the object when any of the files changes, updating the new stat info in _filecache. Mercurial either atomic renames or appends for files under .hg, so to ensure the cache is reliable we need the filesystem to be able to tell us if a file has been replaced. If it can't, we fallback to recreating the object on every call (essentially the same behavior as propertycache). ''' def __init__(self, *paths): self.paths = paths def join(self, obj, fname): """Used to compute the runtime path of a cached file. Users should subclass filecache and provide their own version of this function to call the appropriate join function on 'obj' (an instance of the class that its member function was decorated). """ raise NotImplementedError def __call__(self, func): self.func = func self.name = func.__name__.encode('ascii') return self def __get__(self, obj, type=None): # if accessed on the class, return the descriptor itself. if obj is None: return self # do we need to check if the file changed? if self.name in obj.__dict__: assert self.name in obj._filecache, self.name return obj.__dict__[self.name] entry = obj._filecache.get(self.name) if entry: if entry.changed(): entry.obj = self.func(obj) else: paths = [self.join(obj, path) for path in self.paths] # We stat -before- creating the object so our cache doesn't lie if # a writer modified between the time we read and stat entry = filecacheentry(paths, True) entry.obj = self.func(obj) obj._filecache[self.name] = entry obj.__dict__[self.name] = entry.obj return entry.obj def __set__(self, obj, value): if self.name not in obj._filecache: # we add an entry for the missing value because X in __dict__ # implies X in _filecache paths = [self.join(obj, path) for path in self.paths] ce = filecacheentry(paths, False) obj._filecache[self.name] = ce else: ce = obj._filecache[self.name] ce.obj = value # update cached copy obj.__dict__[self.name] = value # update copy returned by obj.x def __delete__(self, obj): try: del obj.__dict__[self.name] except KeyError: raise AttributeError(self.name) def _locksub(repo, lock, envvar, cmd, environ=None, *args, **kwargs): if lock is None: raise error.LockInheritanceContractViolation( 'lock can only be inherited while held') if environ is None: environ = {} with lock.inherit() as locker: environ[envvar] = locker return repo.ui.system(cmd, environ=environ, *args, **kwargs) def wlocksub(repo, cmd, *args, **kwargs): """run cmd as a subprocess that allows inheriting repo's wlock This can only be called while the wlock is held. This takes all the arguments that ui.system does, and returns the exit code of the subprocess.""" return _locksub(repo, repo.currentwlock(), 'HG_WLOCK_LOCKER', cmd, *args, **kwargs) def gdinitconfig(ui): """helper function to know if a repo should be created as general delta """ # experimental config: format.generaldelta return (ui.configbool('format', 'generaldelta') or ui.configbool('format', 'usegeneraldelta')) def gddeltaconfig(ui): """helper function to know if incoming delta should be optimised """ # experimental config: format.generaldelta return ui.configbool('format', 'generaldelta') class simplekeyvaluefile(object): """A simple file with key=value lines Keys must be alphanumerics and start with a letter, values must not contain '\n' characters""" firstlinekey = '__firstline' def __init__(self, vfs, path, keys=None): self.vfs = vfs self.path = path def read(self, firstlinenonkeyval=False): """Read the contents of a simple key-value file 'firstlinenonkeyval' indicates whether the first line of file should be treated as a key-value pair or reuturned fully under the __firstline key.""" lines = self.vfs.readlines(self.path) d = {} if firstlinenonkeyval: if not lines: e = _("empty simplekeyvalue file") raise error.CorruptedState(e) # we don't want to include '\n' in the __firstline d[self.firstlinekey] = lines[0][:-1] del lines[0] try: # the 'if line.strip()' part prevents us from failing on empty # lines which only contain '\n' therefore are not skipped # by 'if line' updatedict = dict(line[:-1].split('=', 1) for line in lines if line.strip()) if self.firstlinekey in updatedict: e = _("%r can't be used as a key") raise error.CorruptedState(e % self.firstlinekey) d.update(updatedict) except ValueError as e: raise error.CorruptedState(str(e)) return d def write(self, data, firstline=None): """Write key=>value mapping to a file data is a dict. Keys must be alphanumerical and start with a letter. Values must not contain newline characters. If 'firstline' is not None, it is written to file before everything else, as it is, not in a key=value form""" lines = [] if firstline is not None: lines.append('%s\n' % firstline) for k, v in data.items(): if k == self.firstlinekey: e = "key name '%s' is reserved" % self.firstlinekey raise error.ProgrammingError(e) if not k[0].isalpha(): e = "keys must start with a letter in a key-value file" raise error.ProgrammingError(e) if not k.isalnum(): e = "invalid key name in a simple key-value file" raise error.ProgrammingError(e) if '\n' in v: e = "invalid value in a simple key-value file" raise error.ProgrammingError(e) lines.append("%s=%s\n" % (k, v)) with self.vfs(self.path, mode='wb', atomictemp=True) as fp: fp.write(''.join(lines)) def registersummarycallback(repo, otr): """register a callback to issue a summary after the transaction is closed """ reporef = weakref.ref(repo) def reportsummary(tr): """the actual callback reporting the summary""" repo = reporef() obsoleted = obsutil.getobsoleted(repo, tr) if obsoleted: repo.ui.status(_('obsoleted %i changesets\n') % len(obsoleted)) otr.addpostclose('00-txnreport', reportsummary)