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# sparse.py - allow sparse checkouts of the working directory
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#
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# Copyright 2014 Facebook, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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"""allow sparse checkouts of the working directory (EXPERIMENTAL)
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(This extension is not yet protected by backwards compatibility
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guarantees. Any aspect may break in future releases until this
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notice is removed.)
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This extension allows the working directory to only consist of a
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subset of files for the revision. This allows specific files or
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directories to be explicitly included or excluded. Many repository
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operations have performance proportional to the number of files in
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the working directory. So only realizing a subset of files in the
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working directory can improve performance.
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Sparse Config Files
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-------------------
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The set of files that are part of a sparse checkout are defined by
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a sparse config file. The file defines 3 things: includes (files to
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include in the sparse checkout), excludes (files to exclude from the
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sparse checkout), and profiles (links to other config files).
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The file format is newline delimited. Empty lines and lines beginning
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with ``#`` are ignored.
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Lines beginning with ``%include `` denote another sparse config file
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to include. e.g. ``%include tests.sparse``. The filename is relative
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to the repository root.
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The special lines ``[include]`` and ``[exclude]`` denote the section
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for includes and excludes that follow, respectively. It is illegal to
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have ``[include]`` after ``[exclude]``.
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Non-special lines resemble file patterns to be added to either includes
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or excludes. The syntax of these lines is documented by :hg:`help patterns`.
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Patterns are interpreted as ``glob:`` by default and match against the
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root of the repository.
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Exclusion patterns take precedence over inclusion patterns. So even
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if a file is explicitly included, an ``[exclude]`` entry can remove it.
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For example, say you have a repository with 3 directories, ``frontend/``,
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``backend/``, and ``tools/``. ``frontend/`` and ``backend/`` correspond
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to different projects and it is uncommon for someone working on one
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to need the files for the other. But ``tools/`` contains files shared
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between both projects. Your sparse config files may resemble::
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# frontend.sparse
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frontend/**
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tools/**
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# backend.sparse
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backend/**
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tools/**
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Say the backend grows in size. Or there's a directory with thousands
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of files you wish to exclude. You can modify the profile to exclude
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certain files::
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[include]
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backend/**
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tools/**
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[exclude]
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tools/tests/**
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"""
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from __future__ import absolute_import
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from mercurial.i18n import _
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from mercurial import (
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cmdutil,
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commands,
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dirstate,
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error,
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extensions,
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hg,
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match as matchmod,
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registrar,
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sparse,
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util,
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)
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = 'ships-with-hg-core'
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cmdtable = {}
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command = registrar.command(cmdtable)
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def extsetup(ui):
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sparse.enabled = True
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_setupclone(ui)
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_setuplog(ui)
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_setupadd(ui)
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_setupdirstate(ui)
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def replacefilecache(cls, propname, replacement):
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"""Replace a filecache property with a new class. This allows changing the
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cache invalidation condition."""
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origcls = cls
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assert callable(replacement)
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while cls is not object:
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if propname in cls.__dict__:
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orig = cls.__dict__[propname]
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setattr(cls, propname, replacement(orig))
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break
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cls = cls.__bases__[0]
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if cls is object:
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raise AttributeError(_("type '%s' has no property '%s'") % (origcls,
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propname))
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def _setuplog(ui):
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entry = commands.table['^log|history']
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entry[1].append(('', 'sparse', None,
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"limit to changesets affecting the sparse checkout"))
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def _logrevs(orig, repo, opts):
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revs = orig(repo, opts)
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if opts.get('sparse'):
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sparsematch = sparse.matcher(repo)
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def ctxmatch(rev):
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ctx = repo[rev]
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return any(f for f in ctx.files() if sparsematch(f))
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revs = revs.filter(ctxmatch)
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return revs
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extensions.wrapfunction(cmdutil, '_logrevs', _logrevs)
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def _clonesparsecmd(orig, ui, repo, *args, **opts):
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include_pat = opts.get('include')
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exclude_pat = opts.get('exclude')
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enableprofile_pat = opts.get('enable_profile')
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include = exclude = enableprofile = False
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if include_pat:
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pat = include_pat
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include = True
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if exclude_pat:
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pat = exclude_pat
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exclude = True
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if enableprofile_pat:
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pat = enableprofile_pat
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enableprofile = True
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if sum([include, exclude, enableprofile]) > 1:
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raise error.Abort(_("too many flags specified."))
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if include or exclude or enableprofile:
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def clonesparse(orig, self, node, overwrite, *args, **kwargs):
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sparse.updateconfig(self.unfiltered(), pat, {}, include=include,
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exclude=exclude, enableprofile=enableprofile,
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usereporootpaths=True)
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return orig(self, node, overwrite, *args, **kwargs)
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extensions.wrapfunction(hg, 'updaterepo', clonesparse)
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return orig(ui, repo, *args, **opts)
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def _setupclone(ui):
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entry = commands.table['^clone']
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entry[1].append(('', 'enable-profile', [],
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'enable a sparse profile'))
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entry[1].append(('', 'include', [],
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'include sparse pattern'))
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entry[1].append(('', 'exclude', [],
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'exclude sparse pattern'))
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extensions.wrapcommand(commands.table, 'clone', _clonesparsecmd)
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def _setupadd(ui):
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entry = commands.table['^add']
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entry[1].append(('s', 'sparse', None,
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'also include directories of added files in sparse config'))
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def _add(orig, ui, repo, *pats, **opts):
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if opts.get('sparse'):
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dirs = set()
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for pat in pats:
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dirname, basename = util.split(pat)
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dirs.add(dirname)
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sparse.updateconfig(repo, list(dirs), opts, include=True)
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return orig(ui, repo, *pats, **opts)
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extensions.wrapcommand(commands.table, 'add', _add)
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def _setupdirstate(ui):
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"""Modify the dirstate to prevent stat'ing excluded files,
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and to prevent modifications to files outside the checkout.
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"""
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def walk(orig, self, match, subrepos, unknown, ignored, full=True):
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match = matchmod.intersectmatchers(match, self._sparsematcher)
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return orig(self, match, subrepos, unknown, ignored, full)
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extensions.wrapfunction(dirstate.dirstate, 'walk', walk)
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# dirstate.rebuild should not add non-matching files
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def _rebuild(orig, self, parent, allfiles, changedfiles=None):
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matcher = self._sparsematcher
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if not matcher.always():
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allfiles = allfiles.matches(matcher)
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if changedfiles:
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changedfiles = [f for f in changedfiles if matcher(f)]
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if changedfiles is not None:
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# In _rebuild, these files will be deleted from the dirstate
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# when they are not found to be in allfiles
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dirstatefilestoremove = set(f for f in self if not matcher(f))
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changedfiles = dirstatefilestoremove.union(changedfiles)
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return orig(self, parent, allfiles, changedfiles)
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extensions.wrapfunction(dirstate.dirstate, 'rebuild', _rebuild)
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# Prevent adding files that are outside the sparse checkout
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editfuncs = ['normal', 'add', 'normallookup', 'copy', 'remove', 'merge']
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hint = _('include file with `hg debugsparse --include <pattern>` or use ' +
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'`hg add -s <file>` to include file directory while adding')
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for func in editfuncs:
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def _wrapper(orig, self, *args):
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sparsematch = self._sparsematcher
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if not sparsematch.always():
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for f in args:
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if (f is not None and not sparsematch(f) and
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f not in self):
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raise error.Abort(_("cannot add '%s' - it is outside "
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"the sparse checkout") % f,
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hint=hint)
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return orig(self, *args)
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extensions.wrapfunction(dirstate.dirstate, func, _wrapper)
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@command('^debugsparse', [
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('I', 'include', False, _('include files in the sparse checkout')),
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('X', 'exclude', False, _('exclude files in the sparse checkout')),
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('d', 'delete', False, _('delete an include/exclude rule')),
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('f', 'force', False, _('allow changing rules even with pending changes')),
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('', 'enable-profile', False, _('enables the specified profile')),
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('', 'disable-profile', False, _('disables the specified profile')),
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('', 'import-rules', False, _('imports rules from a file')),
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('', 'clear-rules', False, _('clears local include/exclude rules')),
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('', 'refresh', False, _('updates the working after sparseness changes')),
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('', 'reset', False, _('makes the repo full again')),
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] + commands.templateopts,
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_('[--OPTION] PATTERN...'))
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def debugsparse(ui, repo, *pats, **opts):
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"""make the current checkout sparse, or edit the existing checkout
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The sparse command is used to make the current checkout sparse.
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This means files that don't meet the sparse condition will not be
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written to disk, or show up in any working copy operations. It does
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not affect files in history in any way.
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Passing no arguments prints the currently applied sparse rules.
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--include and --exclude are used to add and remove files from the sparse
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checkout. The effects of adding an include or exclude rule are applied
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immediately. If applying the new rule would cause a file with pending
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changes to be added or removed, the command will fail. Pass --force to
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force a rule change even with pending changes (the changes on disk will
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be preserved).
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--delete removes an existing include/exclude rule. The effects are
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immediate.
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--refresh refreshes the files on disk based on the sparse rules. This is
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only necessary if .hg/sparse was changed by hand.
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--enable-profile and --disable-profile accept a path to a .hgsparse file.
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This allows defining sparse checkouts and tracking them inside the
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repository. This is useful for defining commonly used sparse checkouts for
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many people to use. As the profile definition changes over time, the sparse
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checkout will automatically be updated appropriately, depending on which
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changeset is checked out. Changes to .hgsparse are not applied until they
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have been committed.
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--import-rules accepts a path to a file containing rules in the .hgsparse
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format, allowing you to add --include, --exclude and --enable-profile rules
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in bulk. Like the --include, --exclude and --enable-profile switches, the
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changes are applied immediately.
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--clear-rules removes all local include and exclude rules, while leaving
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any enabled profiles in place.
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Returns 0 if editing the sparse checkout succeeds.
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"""
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include = opts.get('include')
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exclude = opts.get('exclude')
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force = opts.get('force')
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enableprofile = opts.get('enable_profile')
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disableprofile = opts.get('disable_profile')
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importrules = opts.get('import_rules')
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clearrules = opts.get('clear_rules')
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delete = opts.get('delete')
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refresh = opts.get('refresh')
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reset = opts.get('reset')
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count = sum([include, exclude, enableprofile, disableprofile, delete,
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importrules, refresh, clearrules, reset])
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if count > 1:
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raise error.Abort(_("too many flags specified"))
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if count == 0:
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if repo.vfs.exists('sparse'):
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ui.status(repo.vfs.read("sparse") + "\n")
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temporaryincludes = sparse.readtemporaryincludes(repo)
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if temporaryincludes:
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ui.status(_("Temporarily Included Files (for merge/rebase):\n"))
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ui.status(("\n".join(temporaryincludes) + "\n"))
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else:
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ui.status(_('repo is not sparse\n'))
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return
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if include or exclude or delete or reset or enableprofile or disableprofile:
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sparse.updateconfig(repo, pats, opts, include=include, exclude=exclude,
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reset=reset, delete=delete,
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enableprofile=enableprofile,
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disableprofile=disableprofile, force=force)
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if importrules:
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sparse.importfromfiles(repo, opts, pats, force=force)
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if clearrules:
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sparse.clearrules(repo, force=force)
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if refresh:
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try:
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wlock = repo.wlock()
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fcounts = map(
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len,
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sparse.refreshwdir(repo, repo.status(), sparse.matcher(repo),
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force=force))
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sparse.printchanges(ui, opts, added=fcounts[0], dropped=fcounts[1],
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conflicting=fcounts[2])
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finally:
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wlock.release()
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