comparison mercurial/narrowspec.py @ 43076:2372284d9457

formatting: blacken the codebase

This is using my patch to black
(https://github.com/psf/black/pull/826) so we don't un-wrap collection
literals.

Done with:

  hg files 'set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"' | xargs black -S

# skip-blame mass-reformatting only

# no-check-commit reformats foo_bar functions

Differential Revision: https://phab.mercurial-scm.org/D6971

43075:57875cf423c9

# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

from .i18n import _
from .interfaces import (
    repository,
)
from . import (
    error,
    match as matchmod,
    merge,
    scmutil,

VALID_PREFIXES = (
    b'path:',
    b'rootfilesin:',
)

def normalizesplitpattern(kind, pat):
    """Returns the normalized version of a pattern and kind.

    Returns a tuple with the normalized kind and normalized pattern.
    """
    pat = pat.rstrip('/')
    _validatepattern(pat)
    return kind, pat

def _numlines(s):
    """Returns the number of lines in s, including ending empty lines."""
    # We use splitlines because it is Unicode-friendly and thus Python 3
    # compatible. However, it does not count empty lines at the end, so trick
    # it by adding a character at the end.
    return len((s + 'x').splitlines())

def _validatepattern(pat):
    """Validates the pattern and aborts if it is invalid.

    Patterns are stored in the narrowspec as newline-separated
    POSIX-style bytestring paths. There's no escaping.

    components = pat.split('/')
    if '.' in components or '..' in components:
        raise error.Abort(_('"." and ".." are not allowed in narrowspec paths'))

def normalizepattern(pattern, defaultkind='path'):
    """Returns the normalized version of a text-format pattern.

    If the pattern has no kind, the default will be added.
    """
    kind, pat = matchmod._patsplit(pattern, defaultkind)
    return '%s:%s' % normalizesplitpattern(kind, pat)

def parsepatterns(pats):
    """Parses an iterable of patterns into a typed pattern set.

    Patterns are assumed to be ``path:`` if no prefix is present.

    """
    res = {normalizepattern(orig) for orig in pats}
    validatepatterns(res)
    return res

def validatepatterns(pats):
    """Validate that patterns are in the expected data structure and format.

    And that is a set of normalized patterns beginning with ``path:`` or
    ``rootfilesin:``.

    This function should be used to validate internal data structures
    and patterns that are loaded from sources that use the internal,
    prefixed pattern representation (but can't necessarily be fully trusted).
    """
    if not isinstance(pats, set):
        raise error.ProgrammingError('narrow patterns should be a set; '
                                     'got %r' % pats)

    for pat in pats:
        if not pat.startswith(VALID_PREFIXES):
            # Use a Mercurial exception because this can happen due to user
            # bugs (e.g. manually updating spec file).
            raise error.Abort(_('invalid prefix on narrow pattern: %s') % pat,
                              hint=_('narrow patterns must begin with one of '
                                     'the following: %s') %
                                   ', '.join(VALID_PREFIXES))

def format(includes, excludes):
    output = '[include]\n'
    for i in sorted(includes - excludes):
        output += i + '\n'
    output += '[exclude]\n'
    for e in sorted(excludes):
        output += e + '\n'
    return output

def match(root, include=None, exclude=None):
    if not include:
        # Passing empty include and empty exclude to matchmod.match()
        # gives a matcher that matches everything, so explicitly use
        # the nevermatcher.
        return matchmod.never()
    return matchmod.match(root, '', [], include=include or [],
                          exclude=exclude or [])

def parseconfig(ui, spec):
    # maybe we should care about the profiles returned too
    includepats, excludepats, profiles = sparse.parseconfig(ui, spec, 'narrow')
    if profiles:
        raise error.Abort(_("including other spec files using '%include' is not"
                            " supported in narrowspec"))

    validatepatterns(includepats)
    validatepatterns(excludepats)

    return includepats, excludepats

def load(repo):
    # Treat "narrowspec does not exist" the same as "narrowspec file exists
    # and is empty".
    spec = repo.svfs.tryread(FILENAME)
    return parseconfig(repo.ui, spec)

def save(repo, includepats, excludepats):
    validatepatterns(includepats)
    validatepatterns(excludepats)
    spec = format(includepats, excludepats)
    repo.svfs.write(FILENAME, spec)

def copytoworkingcopy(repo):
    spec = repo.svfs.read(FILENAME)
    repo.vfs.write(DIRSTATE_FILENAME, spec)

def savebackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    svfs = repo.svfs
    svfs.tryunlink(backupname)
    util.copyfile(svfs.join(FILENAME), svfs.join(backupname), hardlink=True)

def restorebackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    util.rename(repo.svfs.join(backupname), repo.svfs.join(FILENAME))

def savewcbackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    vfs = repo.vfs
    vfs.tryunlink(backupname)
    # It may not exist in old repos
    if vfs.exists(DIRSTATE_FILENAME):
        util.copyfile(vfs.join(DIRSTATE_FILENAME), vfs.join(backupname),
                      hardlink=True)

def restorewcbackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    # It may not exist in old repos
    if repo.vfs.exists(backupname):
        util.rename(repo.vfs.join(backupname), repo.vfs.join(DIRSTATE_FILENAME))

def clearwcbackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    repo.vfs.tryunlink(backupname)

def restrictpatterns(req_includes, req_excludes, repo_includes, repo_excludes):
    r""" Restricts the patterns according to repo settings,
    results in a logical AND operation

            res_includes = set(res_includes)
    else:
        res_includes = set(req_includes)
    return res_includes, res_excludes, invalid_includes

# These two are extracted for extensions (specifically for Google's CitC file
# system)
def _deletecleanfiles(repo, files):
    for f in files:
        repo.wvfs.unlinkpath(f)

def _writeaddedfiles(repo, pctx, files):
    actions = merge.emptyactions()
    addgaction = actions[merge.ACTION_GET].append
    mf = repo['.'].manifest()
    for f in files:
        if not repo.wvfs.exists(f):
            addgaction((f, (mf.flags(f), False), "narrowspec updated"))
    merge.applyupdates(repo, actions, wctx=repo[None],
                       mctx=repo['.'], overwrite=False, wantfiledata=False)

def checkworkingcopynarrowspec(repo):
    # Avoid infinite recursion when updating the working copy
    if getattr(repo, '_updatingnarrowspec', False):
        return
    storespec = repo.svfs.tryread(FILENAME)
    wcspec = repo.vfs.tryread(DIRSTATE_FILENAME)
    if wcspec != storespec:
        raise error.Abort(_("working copy's narrowspec is stale"),
                          hint=_("run 'hg tracked --update-working-copy'"))

def updateworkingcopy(repo, assumeclean=False):
    """updates the working copy and dirstate from the store narrowspec

    When assumeclean=True, files that are not known to be clean will also

    newmatch = match(repo.root, include=newincludes, exclude=newexcludes)
    addedmatch = matchmod.differencematcher(newmatch, oldmatch)
    removedmatch = matchmod.differencematcher(oldmatch, newmatch)

    ds = repo.dirstate
    lookup, status = ds.status(removedmatch, subrepos=[], ignored=True,
                               clean=True, unknown=True)
    trackeddirty = status.modified + status.added
    clean = status.clean
    if assumeclean:
        assert not trackeddirty
        clean.extend(lookup)

43076:2372284d9457

# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

from .i18n import _
from .interfaces import repository
from . import (
    error,
    match as matchmod,
    merge,
    scmutil,

VALID_PREFIXES = (
    b'path:',
    b'rootfilesin:',
)


def normalizesplitpattern(kind, pat):
    """Returns the normalized version of a pattern and kind.

    Returns a tuple with the normalized kind and normalized pattern.
    """
    pat = pat.rstrip('/')
    _validatepattern(pat)
    return kind, pat


def _numlines(s):
    """Returns the number of lines in s, including ending empty lines."""
    # We use splitlines because it is Unicode-friendly and thus Python 3
    # compatible. However, it does not count empty lines at the end, so trick
    # it by adding a character at the end.
    return len((s + 'x').splitlines())


def _validatepattern(pat):
    """Validates the pattern and aborts if it is invalid.

    Patterns are stored in the narrowspec as newline-separated
    POSIX-style bytestring paths. There's no escaping.

    components = pat.split('/')
    if '.' in components or '..' in components:
        raise error.Abort(_('"." and ".." are not allowed in narrowspec paths'))


def normalizepattern(pattern, defaultkind='path'):
    """Returns the normalized version of a text-format pattern.

    If the pattern has no kind, the default will be added.
    """
    kind, pat = matchmod._patsplit(pattern, defaultkind)
    return '%s:%s' % normalizesplitpattern(kind, pat)


def parsepatterns(pats):
    """Parses an iterable of patterns into a typed pattern set.

    Patterns are assumed to be ``path:`` if no prefix is present.

    """
    res = {normalizepattern(orig) for orig in pats}
    validatepatterns(res)
    return res


def validatepatterns(pats):
    """Validate that patterns are in the expected data structure and format.

    And that is a set of normalized patterns beginning with ``path:`` or
    ``rootfilesin:``.

    This function should be used to validate internal data structures
    and patterns that are loaded from sources that use the internal,
    prefixed pattern representation (but can't necessarily be fully trusted).
    """
    if not isinstance(pats, set):
        raise error.ProgrammingError(
            'narrow patterns should be a set; ' 'got %r' % pats
        )

    for pat in pats:
        if not pat.startswith(VALID_PREFIXES):
            # Use a Mercurial exception because this can happen due to user
            # bugs (e.g. manually updating spec file).
            raise error.Abort(
                _('invalid prefix on narrow pattern: %s') % pat,
                hint=_(
                    'narrow patterns must begin with one of '
                    'the following: %s'
                )
                % ', '.join(VALID_PREFIXES),
            )


def format(includes, excludes):
    output = '[include]\n'
    for i in sorted(includes - excludes):
        output += i + '\n'
    output += '[exclude]\n'
    for e in sorted(excludes):
        output += e + '\n'
    return output


def match(root, include=None, exclude=None):
    if not include:
        # Passing empty include and empty exclude to matchmod.match()
        # gives a matcher that matches everything, so explicitly use
        # the nevermatcher.
        return matchmod.never()
    return matchmod.match(
        root, '', [], include=include or [], exclude=exclude or []
    )


def parseconfig(ui, spec):
    # maybe we should care about the profiles returned too
    includepats, excludepats, profiles = sparse.parseconfig(ui, spec, 'narrow')
    if profiles:
        raise error.Abort(
            _(
                "including other spec files using '%include' is not"
                " supported in narrowspec"
            )
        )

    validatepatterns(includepats)
    validatepatterns(excludepats)

    return includepats, excludepats


def load(repo):
    # Treat "narrowspec does not exist" the same as "narrowspec file exists
    # and is empty".
    spec = repo.svfs.tryread(FILENAME)
    return parseconfig(repo.ui, spec)


def save(repo, includepats, excludepats):
    validatepatterns(includepats)
    validatepatterns(excludepats)
    spec = format(includepats, excludepats)
    repo.svfs.write(FILENAME, spec)


def copytoworkingcopy(repo):
    spec = repo.svfs.read(FILENAME)
    repo.vfs.write(DIRSTATE_FILENAME, spec)


def savebackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    svfs = repo.svfs
    svfs.tryunlink(backupname)
    util.copyfile(svfs.join(FILENAME), svfs.join(backupname), hardlink=True)


def restorebackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    util.rename(repo.svfs.join(backupname), repo.svfs.join(FILENAME))


def savewcbackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    vfs = repo.vfs
    vfs.tryunlink(backupname)
    # It may not exist in old repos
    if vfs.exists(DIRSTATE_FILENAME):
        util.copyfile(
            vfs.join(DIRSTATE_FILENAME), vfs.join(backupname), hardlink=True
        )


def restorewcbackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    # It may not exist in old repos
    if repo.vfs.exists(backupname):
        util.rename(repo.vfs.join(backupname), repo.vfs.join(DIRSTATE_FILENAME))


def clearwcbackup(repo, backupname):
    if repository.NARROW_REQUIREMENT not in repo.requirements:
        return
    repo.vfs.tryunlink(backupname)


def restrictpatterns(req_includes, req_excludes, repo_includes, repo_excludes):
    r""" Restricts the patterns according to repo settings,
    results in a logical AND operation

            res_includes = set(res_includes)
    else:
        res_includes = set(req_includes)
    return res_includes, res_excludes, invalid_includes


# These two are extracted for extensions (specifically for Google's CitC file
# system)
def _deletecleanfiles(repo, files):
    for f in files:
        repo.wvfs.unlinkpath(f)


def _writeaddedfiles(repo, pctx, files):
    actions = merge.emptyactions()
    addgaction = actions[merge.ACTION_GET].append
    mf = repo['.'].manifest()
    for f in files:
        if not repo.wvfs.exists(f):
            addgaction((f, (mf.flags(f), False), "narrowspec updated"))
    merge.applyupdates(
        repo,
        actions,
        wctx=repo[None],
        mctx=repo['.'],
        overwrite=False,
        wantfiledata=False,
    )


def checkworkingcopynarrowspec(repo):
    # Avoid infinite recursion when updating the working copy
    if getattr(repo, '_updatingnarrowspec', False):
        return
    storespec = repo.svfs.tryread(FILENAME)
    wcspec = repo.vfs.tryread(DIRSTATE_FILENAME)
    if wcspec != storespec:
        raise error.Abort(
            _("working copy's narrowspec is stale"),
            hint=_("run 'hg tracked --update-working-copy'"),
        )


def updateworkingcopy(repo, assumeclean=False):
    """updates the working copy and dirstate from the store narrowspec

    When assumeclean=True, files that are not known to be clean will also

    newmatch = match(repo.root, include=newincludes, exclude=newexcludes)
    addedmatch = matchmod.differencematcher(newmatch, oldmatch)
    removedmatch = matchmod.differencematcher(oldmatch, newmatch)

    ds = repo.dirstate
    lookup, status = ds.status(
        removedmatch, subrepos=[], ignored=True, clean=True, unknown=True
    )
    trackeddirty = status.modified + status.added
    clean = status.clean
    if assumeclean:
        assert not trackeddirty
        clean.extend(lookup)