sparse: refactor activeprofiles into a generic function (API)
activeprofiles() is a special case of a more generic function.
Furthermore, that generic function is essentially already
implemented inline in the sparse extension.
So, refactor activeprofiles() to a generic activeconfig(). Change
the only consumer of activeprofiles() to use it. And have the
inline implementation in the sparse extension use it.
# sparse.py - functionality for sparse checkouts
#
# Copyright 2014 Facebook, Inc.
#
# 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 collections
import hashlib
import os
from .i18n import _
from .node import nullid
from . import (
error,
match as matchmod,
merge as mergemod,
pycompat,
)
# Whether sparse features are enabled. This variable is intended to be
# temporary to facilitate porting sparse to core. It should eventually be
# a per-repo option, possibly a repo requirement.
enabled = False
def parseconfig(ui, raw):
"""Parse sparse config file content.
Returns a tuple of includes, excludes, and profiles.
"""
includes = set()
excludes = set()
current = includes
profiles = []
for line in raw.split('\n'):
line = line.strip()
if not line or line.startswith('#'):
# empty or comment line, skip
continue
elif line.startswith('%include '):
line = line[9:].strip()
if line:
profiles.append(line)
elif line == '[include]':
if current != includes:
# TODO pass filename into this API so we can report it.
raise error.Abort(_('sparse config cannot have includes ' +
'after excludes'))
continue
elif line == '[exclude]':
current = excludes
elif line:
if line.strip().startswith('/'):
ui.warn(_('warning: sparse profile cannot use' +
' paths starting with /, ignoring %s\n') % line)
continue
current.add(line)
return includes, excludes, profiles
# Exists as separate function to facilitate monkeypatching.
def readprofile(repo, profile, changeid):
"""Resolve the raw content of a sparse profile file."""
# TODO add some kind of cache here because this incurs a manifest
# resolve and can be slow.
return repo.filectx(profile, changeid=changeid).data()
def patternsforrev(repo, rev):
"""Obtain sparse checkout patterns for the given rev.
Returns a tuple of iterables representing includes, excludes, and
patterns.
"""
# Feature isn't enabled. No-op.
if not enabled:
return set(), set(), []
raw = repo.vfs.tryread('sparse')
if not raw:
return set(), set(), []
if rev is None:
raise error.Abort(_('cannot parse sparse patterns from working '
'directory'))
includes, excludes, profiles = parseconfig(repo.ui, raw)
ctx = repo[rev]
if profiles:
visited = set()
while profiles:
profile = profiles.pop()
if profile in visited:
continue
visited.add(profile)
try:
raw = readprofile(repo, profile, rev)
except error.ManifestLookupError:
msg = (
"warning: sparse profile '%s' not found "
"in rev %s - ignoring it\n" % (profile, ctx))
# experimental config: sparse.missingwarning
if repo.ui.configbool(
'sparse', 'missingwarning', True):
repo.ui.warn(msg)
else:
repo.ui.debug(msg)
continue
pincludes, pexcludes, subprofs = parseconfig(repo.ui, raw)
includes.update(pincludes)
excludes.update(pexcludes)
for subprofile in subprofs:
profiles.append(subprofile)
profiles = visited
if includes:
includes.add('.hg*')
return includes, excludes, profiles
def activeconfig(repo):
"""Determine the active sparse config rules.
Rules are constructed by reading the current sparse config and bringing in
referenced profiles from parents of the working directory.
"""
revs = [repo.changelog.rev(node) for node in
repo.dirstate.parents() if node != nullid]
allincludes = set()
allexcludes = set()
allprofiles = set()
for rev in revs:
includes, excludes, profiles = patternsforrev(repo, rev)
allincludes |= includes
allexcludes |= excludes
allprofiles |= set(profiles)
return allincludes, allexcludes, allprofiles
def configsignature(repo, includetemp=True):
"""Obtain the signature string for the current sparse configuration.
This is used to construct a cache key for matchers.
"""
cache = repo._sparsesignaturecache
signature = cache.get('signature')
if includetemp:
tempsignature = cache.get('tempsignature')
else:
tempsignature = '0'
if signature is None or (includetemp and tempsignature is None):
signature = hashlib.sha1(repo.vfs.tryread('sparse')).hexdigest()
cache['signature'] = signature
if includetemp:
raw = repo.vfs.tryread('tempsparse')
tempsignature = hashlib.sha1(raw).hexdigest()
cache['tempsignature'] = tempsignature
return '%s %s' % (signature, tempsignature)
def writeconfig(repo, includes, excludes, profiles):
"""Write the sparse config file given a sparse configuration."""
with repo.vfs('sparse', 'wb') as fh:
for p in sorted(profiles):
fh.write('%%include %s\n' % p)
if includes:
fh.write('[include]\n')
for i in sorted(includes):
fh.write(i)
fh.write('\n')
if excludes:
fh.write('[exclude]\n')
for e in sorted(excludes):
fh.write(e)
fh.write('\n')
repo._sparsesignaturecache.clear()
def readtemporaryincludes(repo):
raw = repo.vfs.tryread('tempsparse')
if not raw:
return set()
return set(raw.split('\n'))
def writetemporaryincludes(repo, includes):
repo.vfs.write('tempsparse', '\n'.join(sorted(includes)))
repo._sparsesignaturecache.clear()
def addtemporaryincludes(repo, additional):
includes = readtemporaryincludes(repo)
for i in additional:
includes.add(i)
writetemporaryincludes(repo, includes)
def prunetemporaryincludes(repo):
if not enabled or not repo.vfs.exists('tempsparse'):
return
s = repo.status()
if s.modified or s.added or s.removed or s.deleted:
# Still have pending changes. Don't bother trying to prune.
return
sparsematch = matcher(repo, includetemp=False)
dirstate = repo.dirstate
actions = []
dropped = []
tempincludes = readtemporaryincludes(repo)
for file in tempincludes:
if file in dirstate and not sparsematch(file):
message = _('dropping temporarily included sparse files')
actions.append((file, None, message))
dropped.append(file)
typeactions = collections.defaultdict(list)
typeactions['r'] = actions
mergemod.applyupdates(repo, typeactions, repo[None], repo['.'], False)
# Fix dirstate
for file in dropped:
dirstate.drop(file)
repo.vfs.unlink('tempsparse')
repo._sparsesignaturecache.clear()
msg = _('cleaned up %d temporarily added file(s) from the '
'sparse checkout\n')
repo.ui.status(msg % len(tempincludes))
def matcher(repo, revs=None, includetemp=True):
"""Obtain a matcher for sparse working directories for the given revs.
If multiple revisions are specified, the matcher is the union of all
revs.
``includetemp`` indicates whether to use the temporary sparse profile.
"""
# If sparse isn't enabled, sparse matcher matches everything.
if not enabled:
return matchmod.always(repo.root, '')
if not revs or revs == [None]:
revs = [repo.changelog.rev(node)
for node in repo.dirstate.parents() if node != nullid]
signature = configsignature(repo, includetemp=includetemp)
key = '%s %s' % (signature, ' '.join(map(pycompat.bytestr, revs)))
result = repo._sparsematchercache.get(key)
if result:
return result
matchers = []
for rev in revs:
try:
includes, excludes, profiles = patternsforrev(repo, rev)
if includes or excludes:
# Explicitly include subdirectories of includes so
# status will walk them down to the actual include.
subdirs = set()
for include in includes:
# TODO consider using posix path functions here so Windows
# \ directory separators don't come into play.
dirname = os.path.dirname(include)
# basename is used to avoid issues with absolute
# paths (which on Windows can include the drive).
while os.path.basename(dirname):
subdirs.add(dirname)
dirname = os.path.dirname(dirname)
matcher = matchmod.match(repo.root, '', [],
include=includes, exclude=excludes,
default='relpath')
if subdirs:
matcher = matchmod.forceincludematcher(matcher, subdirs)
matchers.append(matcher)
except IOError:
pass
if not matchers:
result = matchmod.always(repo.root, '')
elif len(matchers) == 1:
result = matchers[0]
else:
result = matchmod.unionmatcher(matchers)
if includetemp:
tempincludes = readtemporaryincludes(repo)
result = matchmod.forceincludematcher(result, tempincludes)
repo._sparsematchercache[key] = result
return result
def filterupdatesactions(repo, wctx, mctx, branchmerge, actions):
"""Filter updates to only lay out files that match the sparse rules."""
if not enabled:
return actions
oldrevs = [pctx.rev() for pctx in wctx.parents()]
oldsparsematch = matcher(repo, oldrevs)
if oldsparsematch.always():
return actions
files = set()
prunedactions = {}
if branchmerge:
# If we're merging, use the wctx filter, since we're merging into
# the wctx.
sparsematch = matcher(repo, [wctx.parents()[0].rev()])
else:
# If we're updating, use the target context's filter, since we're
# moving to the target context.
sparsematch = matcher(repo, [mctx.rev()])
temporaryfiles = []
for file, action in actions.iteritems():
type, args, msg = action
files.add(file)
if sparsematch(file):
prunedactions[file] = action
elif type == 'm':
temporaryfiles.append(file)
prunedactions[file] = action
elif branchmerge:
if type != 'k':
temporaryfiles.append(file)
prunedactions[file] = action
elif type == 'f':
prunedactions[file] = action
elif file in wctx:
prunedactions[file] = ('r', args, msg)
if len(temporaryfiles) > 0:
repo.ui.status(_('temporarily included %d file(s) in the sparse '
'checkout for merging\n') % len(temporaryfiles))
addtemporaryincludes(repo, temporaryfiles)
# Add the new files to the working copy so they can be merged, etc
actions = []
message = 'temporarily adding to sparse checkout'
wctxmanifest = repo[None].manifest()
for file in temporaryfiles:
if file in wctxmanifest:
fctx = repo[None][file]
actions.append((file, (fctx.flags(), False), message))
typeactions = collections.defaultdict(list)
typeactions['g'] = actions
mergemod.applyupdates(repo, typeactions, repo[None], repo['.'],
False)
dirstate = repo.dirstate
for file, flags, msg in actions:
dirstate.normal(file)
profiles = activeconfig(repo)[2]
changedprofiles = profiles & files
# If an active profile changed during the update, refresh the checkout.
# Don't do this during a branch merge, since all incoming changes should
# have been handled by the temporary includes above.
if changedprofiles and not branchmerge:
mf = mctx.manifest()
for file in mf:
old = oldsparsematch(file)
new = sparsematch(file)
if not old and new:
flags = mf.flags(file)
prunedactions[file] = ('g', (flags, False), '')
elif old and not new:
prunedactions[file] = ('r', [], '')
return prunedactions
def refreshwdir(repo, origstatus, origsparsematch, force=False):
"""Refreshes working directory by taking sparse config into account.
The old status and sparse matcher is compared against the current sparse
matcher.
Will abort if a file with pending changes is being excluded or included
unless ``force`` is True.
"""
# Verify there are no pending changes
pending = set()
pending.update(origstatus.modified)
pending.update(origstatus.added)
pending.update(origstatus.removed)
sparsematch = matcher(repo)
abort = False
for f in pending:
if not sparsematch(f):
repo.ui.warn(_("pending changes to '%s'\n") % f)
abort = not force
if abort:
raise error.Abort(_('could not update sparseness due to pending '
'changes'))
# Calculate actions
dirstate = repo.dirstate
ctx = repo['.']
added = []
lookup = []
dropped = []
mf = ctx.manifest()
files = set(mf)
actions = {}
for file in files:
old = origsparsematch(file)
new = sparsematch(file)
# Add files that are newly included, or that don't exist in
# the dirstate yet.
if (new and not old) or (old and new and not file in dirstate):
fl = mf.flags(file)
if repo.wvfs.exists(file):
actions[file] = ('e', (fl,), '')
lookup.append(file)
else:
actions[file] = ('g', (fl, False), '')
added.append(file)
# Drop files that are newly excluded, or that still exist in
# the dirstate.
elif (old and not new) or (not old and not new and file in dirstate):
dropped.append(file)
if file not in pending:
actions[file] = ('r', [], '')
# Verify there are no pending changes in newly included files
abort = False
for file in lookup:
repo.ui.warn(_("pending changes to '%s'\n") % file)
abort = not force
if abort:
raise error.Abort(_('cannot change sparseness due to pending '
'changes (delete the files or use '
'--force to bring them back dirty)'))
# Check for files that were only in the dirstate.
for file, state in dirstate.iteritems():
if not file in files:
old = origsparsematch(file)
new = sparsematch(file)
if old and not new:
dropped.append(file)
# Apply changes to disk
typeactions = dict((m, []) for m in 'a f g am cd dc r dm dg m e k'.split())
for f, (m, args, msg) in actions.iteritems():
if m not in typeactions:
typeactions[m] = []
typeactions[m].append((f, args, msg))
mergemod.applyupdates(repo, typeactions, repo[None], repo['.'], False)
# Fix dirstate
for file in added:
dirstate.normal(file)
for file in dropped:
dirstate.drop(file)
for file in lookup:
# File exists on disk, and we're bringing it back in an unknown state.
dirstate.normallookup(file)
return added, dropped, lookup
def aftercommit(repo, node):
"""Perform actions after a working directory commit."""
# This function is called unconditionally, even if sparse isn't
# enabled.
ctx = repo[node]
profiles = patternsforrev(repo, ctx.rev())[2]
# profiles will only have data if sparse is enabled.
if set(profiles) & set(ctx.files()):
origstatus = repo.status()
origsparsematch = matcher(repo)
refreshwdir(repo, origstatus, origsparsematch, force=True)
prunetemporaryincludes(repo)
def clearrules(repo, force=False):
"""Clears include/exclude rules from the sparse config.
The remaining sparse config only has profiles, if defined. The working
directory is refreshed, as needed.
"""
with repo.wlock():
raw = repo.vfs.tryread('sparse')
includes, excludes, profiles = parseconfig(repo.ui, raw)
if not includes and not excludes:
return
oldstatus = repo.status()
oldmatch = matcher(repo)
writeconfig(repo, set(), set(), profiles)
refreshwdir(repo, oldstatus, oldmatch, force=force)
def printchanges(ui, opts, profilecount=0, includecount=0, excludecount=0,
added=0, dropped=0, conflicting=0):
"""Print output summarizing sparse config changes."""
with ui.formatter('sparse', opts) as fm:
fm.startitem()
fm.condwrite(ui.verbose, 'profiles_added', _('Profiles changed: %d\n'),
profilecount)
fm.condwrite(ui.verbose, 'include_rules_added',
_('Include rules changed: %d\n'), includecount)
fm.condwrite(ui.verbose, 'exclude_rules_added',
_('Exclude rules changed: %d\n'), excludecount)
# In 'plain' verbose mode, mergemod.applyupdates already outputs what
# files are added or removed outside of the templating formatter
# framework. No point in repeating ourselves in that case.
if not fm.isplain():
fm.condwrite(ui.verbose, 'files_added', _('Files added: %d\n'),
added)
fm.condwrite(ui.verbose, 'files_dropped', _('Files dropped: %d\n'),
dropped)
fm.condwrite(ui.verbose, 'files_conflicting',
_('Files conflicting: %d\n'), conflicting)