comparison mercurial/hgweb/webutil.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

    templateutil,
    ui as uimod,
    util,
)

from ..utils import (
    stringutil,
)

archivespecs = util.sortdict((
    ('zip', ('application/zip', 'zip', '.zip', None)),
    ('gz', ('application/x-gzip', 'tgz', '.tar.gz', None)),
    ('bz2', ('application/x-bzip2', 'tbz2', '.tar.bz2', None)),
))

def archivelist(ui, nodeid, url=None):
    allowed = ui.configlist('web', 'allow-archive', untrusted=True)
    archives = []

    for typ, spec in archivespecs.iteritems():
        if typ in allowed or ui.configbool('web', 'allow' + typ,
                                           untrusted=True):
            archives.append({
                'type': typ,
                'extension': spec[2],
                'node': nodeid,
                'url': url,
            })

    return templateutil.mappinglist(archives)

def up(p):
    if p[0:1] != "/":
        p = "/" + p
    if p[-1:] == "/":
        p = p[:-1]
    up = os.path.dirname(p)
    if up == "/":
        return "/"
    return up + "/"

def _navseq(step, firststep=None):
    if firststep:
        yield firststep
        if firststep >= 20 and firststep <= 40:

    while True:
        yield 1 * step
        yield 3 * step
        step *= 10

class revnav(object):

    def __init__(self, repo):
        """Navigation generation object

        :repo: repo object we generate nav for
        """

            - containing a dictionary with a `before` and `after` key
            - values are dictionaries with `label` and `node` keys
        """
        if not self:
            # empty repo
            return templateutil.mappinglist([
                {'before': templateutil.mappinglist([]),
                 'after': templateutil.mappinglist([])},
            ])

        targets = []
        for f in _navseq(1, pagelen):
            if f > limit:
                break

        navafter = []
        for rev in targets:
            if rev not in self._revlog:
                continue
            if pos < rev < limit:
                navafter.append({'label': '+%d' % abs(rev - pos),
                                 'node': self.hex(rev)})
            if 0 < rev < pos:
                navbefore.append({'label': '-%d' % abs(rev - pos),
                                  'node': self.hex(rev)})

        navafter.append({'label': 'tip', 'node': 'tip'})

        # TODO: maybe this can be a scalar object supporting tomap()
        return templateutil.mappinglist([
            {'before': templateutil.mappinglist(navbefore),
             'after': templateutil.mappinglist(navafter)},
        ])

class filerevnav(revnav):

    def __init__(self, repo, path):
        """Navigation generation object

        :repo: repo object we generate nav for
        :path: path of the file we generate nav for

        # used for hex generation
        self._revlog = repo.file(path)

    def hex(self, rev):
        return hex(self._changelog.node(self._revlog.linkrev(rev)))

# TODO: maybe this can be a wrapper class for changectx/filectx list, which
# yields {'ctx': ctx}
def _ctxsgen(context, ctxs):
    for s in ctxs:

        }
        if util.safehasattr(s, 'path'):
            d['file'] = s.path()
        yield d

def _siblings(siblings=None, hiderev=None):
    if siblings is None:
        siblings = []
    siblings = [s for s in siblings if s.node() != nullid]
    if len(siblings) == 1 and siblings[0].rev() == hiderev:
        siblings = []
    return templateutil.mappinggenerator(_ctxsgen, args=(siblings,))

def difffeatureopts(req, ui, section):
    diffopts = diffutil.difffeatureopts(ui, untrusted=True,
                                        section=section, whitespace=True)

    for k in ('ignorews', 'ignorewsamount', 'ignorewseol', 'ignoreblanklines'):
        v = req.qsparams.get(k)
        if v is not None:
            v = stringutil.parsebool(v)
            setattr(diffopts, k, v if v is not None else True)

    return diffopts

def annotate(req, fctx, ui):
    diffopts = difffeatureopts(req, ui, 'annotate')
    return fctx.annotate(follow=True, diffopts=diffopts)

def parents(ctx, hide=None):
    if isinstance(ctx, context.basefilectx):
        introrev = ctx.introrev()
        if ctx.changectx().rev() != introrev:
            return _siblings([ctx.repo()[introrev]], hide)
    return _siblings(ctx.parents(), hide)

def children(ctx, hide=None):
    return _siblings(ctx.children(), hide)

def renamelink(fctx):
    r = fctx.renamed()
    if r:
        return templateutil.mappinglist([{'file': r[0], 'node': hex(r[1])}])
    return templateutil.mappinglist([])

def nodetagsdict(repo, node):
    return templateutil.hybridlist(repo.nodetags(node), name='name')

def nodebookmarksdict(repo, node):
    return templateutil.hybridlist(repo.nodebookmarks(node), name='name')

def nodebranchdict(repo, ctx):
    branches = []
    branch = ctx.branch()
    # If this is an empty repo, ctx.node() == nullid,

        branchnode = None
    if branchnode == ctx.node():
        branches.append(branch)
    return templateutil.hybridlist(branches, name='name')

def nodeinbranch(repo, ctx):
    branches = []
    branch = ctx.branch()
    try:
        branchnode = repo.branchtip(branch)

        branchnode = None
    if branch != 'default' and branchnode != ctx.node():
        branches.append(branch)
    return templateutil.hybridlist(branches, name='name')

def nodebranchnodefault(ctx):
    branches = []
    branch = ctx.branch()
    if branch != 'default':
        branches.append(branch)
    return templateutil.hybridlist(branches, name='name')

def _nodenamesgen(context, f, node, name):
    for t in f(node):
        yield {name: t}

def showtag(repo, t1, node=nullid):
    args = (repo.nodetags, node, 'tag')
    return templateutil.mappinggenerator(_nodenamesgen, args=args, name=t1)

def showbookmark(repo, t1, node=nullid):
    args = (repo.nodebookmarks, node, 'bookmark')
    return templateutil.mappinggenerator(_nodenamesgen, args=args, name=t1)

def branchentries(repo, stripecount, limit=0):
    tips = []
    heads = repo.heads()
    parity = paritygen(stripecount)

            yield {
                'parity': next(parity),
                'branch': ctx.branch(),
                'status': status,
                'node': ctx.hex(),
                'date': ctx.date()
            }

    return templateutil.mappinggenerator(entries)

def cleanpath(repo, path):
    path = path.lstrip('/')
    auditor = pathutil.pathauditor(repo.root, realfs=False)
    return pathutil.canonpath(repo.root, '', path, auditor=auditor)

def changectx(repo, req):
    changeid = "tip"
    if 'node' in req.qsparams:
        changeid = req.qsparams['node']
        ipos = changeid.find(':')
        if ipos != -1:
            changeid = changeid[(ipos + 1):]

    return scmutil.revsymbol(repo, changeid)

def basechangectx(repo, req):
    if 'node' in req.qsparams:
        changeid = req.qsparams['node']
        ipos = changeid.find(':')
        if ipos != -1:
            changeid = changeid[:ipos]
            return scmutil.revsymbol(repo, changeid)

    return None

def filectx(repo, req):
    if 'file' not in req.qsparams:
        raise ErrorResponse(HTTP_NOT_FOUND, 'file not given')
    path = cleanpath(repo, req.qsparams['file'])

    except error.RepoError:
        fctx = repo.filectx(path, fileid=changeid)

    return fctx

def linerange(req):
    linerange = req.qsparams.getall('linerange')
    if not linerange:
        return None
    if len(linerange) > 1:
        raise ErrorResponse(HTTP_BAD_REQUEST,
                            'redundant linerange parameter')
    try:
        fromline, toline = map(int, linerange[0].split(':', 1))
    except ValueError:
        raise ErrorResponse(HTTP_BAD_REQUEST,
                            'invalid linerange parameter')
    try:
        return util.processlinerange(fromline, toline)
    except error.ParseError as exc:
        raise ErrorResponse(HTTP_BAD_REQUEST, pycompat.bytestr(exc))

def formatlinerange(fromline, toline):
    return '%d:%d' % (fromline + 1, toline)

def _succsandmarkersgen(context, mapping):
    repo = context.resource(mapping, 'repo')
    itemmappings = templatekw.showsuccsandmarkers(context, mapping)
    for item in itemmappings.tovalue(context, mapping):
        item['successors'] = _siblings(repo[successor]
                                       for successor in item['successors'])
        yield item

def succsandmarkers(context, mapping):
    return templateutil.mappinggenerator(_succsandmarkersgen, args=(mapping,))

# teach templater succsandmarkers is switched to (context, mapping) API
succsandmarkers._requires = {'repo', 'ctx'}

def _whyunstablegen(context, mapping):
    repo = context.resource(mapping, 'repo')
    ctx = context.resource(mapping, 'ctx')

    for entry in entries:
        if entry.get('divergentnodes'):
            entry['divergentnodes'] = _siblings(entry['divergentnodes'])
        yield entry

def whyunstable(context, mapping):
    return templateutil.mappinggenerator(_whyunstablegen, args=(mapping,))

whyunstable._requires = {'repo', 'ctx'}

def commonentry(repo, ctx):
    node = scmutil.binnode(ctx)
    return {
        # TODO: perhaps ctx.changectx() should be assigned if ctx is a

        'date': ctx.date(),
        'extra': ctx.extra(),
        'phase': ctx.phasestr(),
        'obsolete': ctx.obsolete(),
        'succsandmarkers': succsandmarkers,
        'instabilities': templateutil.hybridlist(ctx.instabilities(),
                                                 name='instability'),
        'whyunstable': whyunstable,
        'branch': nodebranchnodefault(ctx),
        'inbranch': nodeinbranch(repo, ctx),
        'branches': nodebranchdict(repo, ctx),
        'tags': nodetagsdict(repo, node),
        'bookmarks': nodebookmarksdict(repo, node),
        'parent': lambda context, mapping: parents(ctx),
        'child': lambda context, mapping: children(ctx),
    }

def changelistentry(web, ctx):
    '''Obtain a dictionary to be used for entries in a changelist.

    This function is called when producing items for the "entries" list passed
    to the "shortlog" and "changelog" templates.

    n = scmutil.binnode(ctx)
    showtags = showtag(repo, 'changelogtag', n)
    files = listfilediffs(ctx.files(), n, web.maxfiles)

    entry = commonentry(repo, ctx)
    entry.update({
        'allparents': lambda context, mapping: parents(ctx),
        'parent': lambda context, mapping: parents(ctx, rev - 1),
        'child': lambda context, mapping: children(ctx, rev + 1),
        'changelogtag': showtags,
        'files': files,
    })
    return entry

def changelistentries(web, revs, maxcount, parityfn):
    """Emit up to N records for an iterable of revisions."""
    repo = web.repo

        entry = changelistentry(web, repo[rev])
        entry['parity'] = next(parityfn)

        yield entry

def symrevorshortnode(req, ctx):
    if 'node' in req.qsparams:
        return templatefilters.revescape(req.qsparams['node'])
    else:
        return short(scmutil.binnode(ctx))

def _listfilesgen(context, ctx, stripecount):
    parity = paritygen(stripecount)
    for blockno, f in enumerate(ctx.files()):
        template = 'filenodelink' if f in ctx else 'filenolink'
        yield context.process(template, {
            'node': ctx.hex(),
            'file': f,
            'blockno': blockno + 1,
            'parity': next(parity),
        })

def changesetentry(web, ctx):
    '''Obtain a dictionary to be used to render the "changeset" template.'''

    showtags = showtag(web.repo, 'changesettag', scmutil.binnode(ctx))
    showbookmarks = showbookmark(web.repo, 'changesetbookmark',
                                 scmutil.binnode(ctx))
    showbranch = nodebranchnodefault(ctx)

    basectx = basechangectx(web.repo, web.req)
    if basectx is None:
        basectx = ctx.p1()

        symrev=symrevorshortnode(web.req, ctx),
        basenode=basectx.hex(),
        changesettag=showtags,
        changesetbookmark=showbookmarks,
        changesetbranch=showbranch,
        files=templateutil.mappedgenerator(_listfilesgen,
                                           args=(ctx, web.stripecount)),
        diffsummary=lambda context, mapping: diffsummary(diffstatsgen),
        diffstat=diffstats,
        archives=web.archivelist(ctx.hex()),
        **pycompat.strkwargs(commonentry(web.repo, ctx)))

def _listfilediffsgen(context, files, node, max):
    for f in files[:max]:
        yield context.process('filedifflink', {'node': hex(node), 'file': f})
    if len(files) > max:
        yield context.process('fileellipses', {})

def listfilediffs(files, node, max):
    return templateutil.mappedgenerator(_listfilediffsgen,
                                        args=(files, node, max))

def _prettyprintdifflines(context, lines, blockno, lineidprefix):
    for lineno, l in enumerate(lines, 1):
        difflineno = "%d.%d" % (blockno, lineno)
        if l.startswith('+'):

            ltype = "difflineminus"
        elif l.startswith('@'):
            ltype = "difflineat"
        else:
            ltype = "diffline"
        yield context.process(ltype, {
            'line': l,
            'lineno': lineno,
            'lineid': lineidprefix + "l%s" % difflineno,
            'linenumber': "% 8s" % difflineno,
        })

def _diffsgen(context, repo, ctx, basectx, files, style, stripecount,
              linerange, lineidprefix):
    if files:
        m = match.exact(files)
    else:
        m = match.always()

                s1, l1, s2, l2 = hunkrange
                if not mdiff.hunkinrange((s2, l2), linerange):
                    continue
            lines.extend(hunklines)
        if lines:
            l = templateutil.mappedgenerator(_prettyprintdifflines,
                                             args=(lines, blockno,
                                                   lineidprefix))
            yield {
                'parity': next(parity),
                'blockno': blockno,
                'lines': l,
            }

def diffs(web, ctx, basectx, files, style, linerange=None, lineidprefix=''):
    args = (web.repo, ctx, basectx, files, style, web.stripecount,
            linerange, lineidprefix)
    return templateutil.mappinggenerator(_diffsgen, args=args, name='diffblock')

def _compline(type, leftlineno, leftline, rightlineno, rightline):
    lineid = leftlineno and ("l%d" % leftlineno) or ''
    lineid += rightlineno and ("r%d" % rightlineno) or ''
    llno = '%d' % leftlineno if leftlineno else ''

        'rightlineno': rightlineno,
        'rightlinenumber': "% 6s" % rlno,
        'rightline': rightline or '',
    }

def _getcompblockgen(context, leftlines, rightlines, opcodes):
    for type, llo, lhi, rlo, rhi in opcodes:
        type = pycompat.sysbytes(type)
        len1 = lhi - llo
        len2 = rhi - rlo
        count = min(len1, len2)
        for i in pycompat.xrange(count):
            yield _compline(type=type,
                            leftlineno=llo + i + 1,
                            leftline=leftlines[llo + i],
                            rightlineno=rlo + i + 1,
                            rightline=rightlines[rlo + i])
        if len1 > len2:
            for i in pycompat.xrange(llo + count, lhi):
                yield _compline(type=type,
                                leftlineno=i + 1,
                                leftline=leftlines[i],
                                rightlineno=None,
                                rightline=None)
        elif len2 > len1:
            for i in pycompat.xrange(rlo + count, rhi):
                yield _compline(type=type,
                                leftlineno=None,
                                leftline=None,
                                rightlineno=i + 1,
                                rightline=rightlines[i])

def _getcompblock(leftlines, rightlines, opcodes):
    args = (leftlines, rightlines, opcodes)
    return templateutil.mappinggenerator(_getcompblockgen, args=args,
                                         name='comparisonline')

def _comparegen(context, contextnum, leftlines, rightlines):
    '''Generator function that provides side-by-side comparison data.'''
    s = difflib.SequenceMatcher(None, leftlines, rightlines)
    if contextnum < 0:

    else:
        for oc in s.get_grouped_opcodes(n=contextnum):
            l = _getcompblock(leftlines, rightlines, oc)
            yield {'lines': l}

def compare(contextnum, leftlines, rightlines):
    args = (contextnum, leftlines, rightlines)
    return templateutil.mappinggenerator(_comparegen, args=args,
                                         name='comparisonblock')

def diffstatgen(ui, ctx, basectx):
    '''Generator function that provides the diffstat data.'''

    diffopts = patch.diffopts(ui, {'noprefix': False})
    stats = patch.diffstatdata(
        util.iterlines(ctx.diff(basectx, opts=diffopts)))
    maxname, maxtotal, addtotal, removetotal, binary = patch.diffstatsum(stats)
    while True:
        yield stats, maxname, maxtotal, addtotal, removetotal, binary

def diffsummary(statgen):
    '''Return a short summary of the diff.'''

    stats, maxname, maxtotal, addtotal, removetotal, binary = next(statgen)
    return _(' %d files changed, %d insertions(+), %d deletions(-)\n') % (
             len(stats), addtotal, removetotal)

def _diffstattmplgen(context, ctx, statgen, parity):
    stats, maxname, maxtotal, addtotal, removetotal, binary = next(statgen)
    files = ctx.files()

    fileno = 0
    for filename, adds, removes, isbinary in stats:
        template = 'diffstatlink' if filename in files else 'diffstatnolink'
        total = adds + removes
        fileno += 1
        yield context.process(template, {
            'node': ctx.hex(),
            'file': filename,
            'fileno': fileno,
            'total': total,
            'addpct': pct(adds),
            'removepct': pct(removes),
            'parity': next(parity),
        })

def diffstat(ctx, statgen, parity):
    '''Return a diffstat template for each file in the diff.'''
    args = (ctx, statgen, parity)
    return templateutil.mappedgenerator(_diffstattmplgen, args=args)

class sessionvars(templateutil.wrapped):
    def __init__(self, vars, start='?'):
        self._start = start
        self._vars = vars

        raise error.ParseError(_('not filterable'))

    def itermaps(self, context):
        separator = self._start
        for key, value in sorted(self._vars.iteritems()):
            yield {'name': key,
                   'value': pycompat.bytestr(value),
                   'separator': separator,
            }
            separator = '&'

    def join(self, context, mapping, sep):
        # could be '{separator}{name}={value|urlescape}'

    def tobool(self, context, mapping):
        return bool(self._vars)

    def tovalue(self, context, mapping):
        return self._vars

class wsgiui(uimod.ui):
    # default termwidth breaks under mod_wsgi
    def termwidth(self):
        return 80

def getwebsubs(repo):
    websubtable = []
    websubdefs = repo.ui.configitems('websub')
    # we must maintain interhg backwards compatibility

        # identify portions of the pattern, taking care to avoid escaped
        # delimiters. the replace format and flags are optional, but
        # delimiters are required.
        match = re.match(
            br'^s%s(.+)(?:(?<=\\\\)|(?<!\\))%s(.*)%s([ilmsux])*$'
            % (delim, delim, delim), pattern)
        if not match:
            repo.ui.warn(_("websub: invalid pattern for %s: %s\n")
                              % (key, pattern))
            continue

        # we need to unescape the delimiter for regexp and format
        delim_re = re.compile(br'(?<!\\)\\%s' % delim)
        regexp = delim_re.sub(unesc, match.group(1))

        try:
            regexp = re.compile(regexp, flags)
            websubtable.append((regexp, format))
        except re.error:
            repo.ui.warn(_("websub: invalid regexp for %s: %s\n")
                         % (key, regexp))
    return websubtable

def getgraphnode(repo, ctx):
    return (templatekw.getgraphnodecurrent(repo, ctx) +
            templatekw.getgraphnodesymbol(ctx))

43076:2372284d9457

    templateutil,
    ui as uimod,
    util,
)

from ..utils import stringutil

archivespecs = util.sortdict(
    (
        ('zip', ('application/zip', 'zip', '.zip', None)),
        ('gz', ('application/x-gzip', 'tgz', '.tar.gz', None)),
        ('bz2', ('application/x-bzip2', 'tbz2', '.tar.bz2', None)),
    )
)


def archivelist(ui, nodeid, url=None):
    allowed = ui.configlist('web', 'allow-archive', untrusted=True)
    archives = []

    for typ, spec in archivespecs.iteritems():
        if typ in allowed or ui.configbool(
            'web', 'allow' + typ, untrusted=True
        ):
            archives.append(
                {'type': typ, 'extension': spec[2], 'node': nodeid, 'url': url,}
            )

    return templateutil.mappinglist(archives)


def up(p):
    if p[0:1] != "/":
        p = "/" + p
    if p[-1:] == "/":
        p = p[:-1]
    up = os.path.dirname(p)
    if up == "/":
        return "/"
    return up + "/"


def _navseq(step, firststep=None):
    if firststep:
        yield firststep
        if firststep >= 20 and firststep <= 40:

    while True:
        yield 1 * step
        yield 3 * step
        step *= 10


class revnav(object):
    def __init__(self, repo):
        """Navigation generation object

        :repo: repo object we generate nav for
        """

            - containing a dictionary with a `before` and `after` key
            - values are dictionaries with `label` and `node` keys
        """
        if not self:
            # empty repo
            return templateutil.mappinglist(
                [
                    {
                        'before': templateutil.mappinglist([]),
                        'after': templateutil.mappinglist([]),
                    },
                ]
            )

        targets = []
        for f in _navseq(1, pagelen):
            if f > limit:
                break

        navafter = []
        for rev in targets:
            if rev not in self._revlog:
                continue
            if pos < rev < limit:
                navafter.append(
                    {'label': '+%d' % abs(rev - pos), 'node': self.hex(rev)}
                )
            if 0 < rev < pos:
                navbefore.append(
                    {'label': '-%d' % abs(rev - pos), 'node': self.hex(rev)}
                )

        navafter.append({'label': 'tip', 'node': 'tip'})

        # TODO: maybe this can be a scalar object supporting tomap()
        return templateutil.mappinglist(
            [
                {
                    'before': templateutil.mappinglist(navbefore),
                    'after': templateutil.mappinglist(navafter),
                },
            ]
        )


class filerevnav(revnav):
    def __init__(self, repo, path):
        """Navigation generation object

        :repo: repo object we generate nav for
        :path: path of the file we generate nav for

        # used for hex generation
        self._revlog = repo.file(path)

    def hex(self, rev):
        return hex(self._changelog.node(self._revlog.linkrev(rev)))


# TODO: maybe this can be a wrapper class for changectx/filectx list, which
# yields {'ctx': ctx}
def _ctxsgen(context, ctxs):
    for s in ctxs:

        }
        if util.safehasattr(s, 'path'):
            d['file'] = s.path()
        yield d


def _siblings(siblings=None, hiderev=None):
    if siblings is None:
        siblings = []
    siblings = [s for s in siblings if s.node() != nullid]
    if len(siblings) == 1 and siblings[0].rev() == hiderev:
        siblings = []
    return templateutil.mappinggenerator(_ctxsgen, args=(siblings,))


def difffeatureopts(req, ui, section):
    diffopts = diffutil.difffeatureopts(
        ui, untrusted=True, section=section, whitespace=True
    )

    for k in ('ignorews', 'ignorewsamount', 'ignorewseol', 'ignoreblanklines'):
        v = req.qsparams.get(k)
        if v is not None:
            v = stringutil.parsebool(v)
            setattr(diffopts, k, v if v is not None else True)

    return diffopts


def annotate(req, fctx, ui):
    diffopts = difffeatureopts(req, ui, 'annotate')
    return fctx.annotate(follow=True, diffopts=diffopts)


def parents(ctx, hide=None):
    if isinstance(ctx, context.basefilectx):
        introrev = ctx.introrev()
        if ctx.changectx().rev() != introrev:
            return _siblings([ctx.repo()[introrev]], hide)
    return _siblings(ctx.parents(), hide)


def children(ctx, hide=None):
    return _siblings(ctx.children(), hide)


def renamelink(fctx):
    r = fctx.renamed()
    if r:
        return templateutil.mappinglist([{'file': r[0], 'node': hex(r[1])}])
    return templateutil.mappinglist([])


def nodetagsdict(repo, node):
    return templateutil.hybridlist(repo.nodetags(node), name='name')


def nodebookmarksdict(repo, node):
    return templateutil.hybridlist(repo.nodebookmarks(node), name='name')


def nodebranchdict(repo, ctx):
    branches = []
    branch = ctx.branch()
    # If this is an empty repo, ctx.node() == nullid,

        branchnode = None
    if branchnode == ctx.node():
        branches.append(branch)
    return templateutil.hybridlist(branches, name='name')


def nodeinbranch(repo, ctx):
    branches = []
    branch = ctx.branch()
    try:
        branchnode = repo.branchtip(branch)

        branchnode = None
    if branch != 'default' and branchnode != ctx.node():
        branches.append(branch)
    return templateutil.hybridlist(branches, name='name')


def nodebranchnodefault(ctx):
    branches = []
    branch = ctx.branch()
    if branch != 'default':
        branches.append(branch)
    return templateutil.hybridlist(branches, name='name')


def _nodenamesgen(context, f, node, name):
    for t in f(node):
        yield {name: t}


def showtag(repo, t1, node=nullid):
    args = (repo.nodetags, node, 'tag')
    return templateutil.mappinggenerator(_nodenamesgen, args=args, name=t1)


def showbookmark(repo, t1, node=nullid):
    args = (repo.nodebookmarks, node, 'bookmark')
    return templateutil.mappinggenerator(_nodenamesgen, args=args, name=t1)


def branchentries(repo, stripecount, limit=0):
    tips = []
    heads = repo.heads()
    parity = paritygen(stripecount)

            yield {
                'parity': next(parity),
                'branch': ctx.branch(),
                'status': status,
                'node': ctx.hex(),
                'date': ctx.date(),
            }

    return templateutil.mappinggenerator(entries)


def cleanpath(repo, path):
    path = path.lstrip('/')
    auditor = pathutil.pathauditor(repo.root, realfs=False)
    return pathutil.canonpath(repo.root, '', path, auditor=auditor)


def changectx(repo, req):
    changeid = "tip"
    if 'node' in req.qsparams:
        changeid = req.qsparams['node']
        ipos = changeid.find(':')
        if ipos != -1:
            changeid = changeid[(ipos + 1) :]

    return scmutil.revsymbol(repo, changeid)


def basechangectx(repo, req):
    if 'node' in req.qsparams:
        changeid = req.qsparams['node']
        ipos = changeid.find(':')
        if ipos != -1:
            changeid = changeid[:ipos]
            return scmutil.revsymbol(repo, changeid)

    return None


def filectx(repo, req):
    if 'file' not in req.qsparams:
        raise ErrorResponse(HTTP_NOT_FOUND, 'file not given')
    path = cleanpath(repo, req.qsparams['file'])

    except error.RepoError:
        fctx = repo.filectx(path, fileid=changeid)

    return fctx


def linerange(req):
    linerange = req.qsparams.getall('linerange')
    if not linerange:
        return None
    if len(linerange) > 1:
        raise ErrorResponse(HTTP_BAD_REQUEST, 'redundant linerange parameter')
    try:
        fromline, toline = map(int, linerange[0].split(':', 1))
    except ValueError:
        raise ErrorResponse(HTTP_BAD_REQUEST, 'invalid linerange parameter')
    try:
        return util.processlinerange(fromline, toline)
    except error.ParseError as exc:
        raise ErrorResponse(HTTP_BAD_REQUEST, pycompat.bytestr(exc))


def formatlinerange(fromline, toline):
    return '%d:%d' % (fromline + 1, toline)


def _succsandmarkersgen(context, mapping):
    repo = context.resource(mapping, 'repo')
    itemmappings = templatekw.showsuccsandmarkers(context, mapping)
    for item in itemmappings.tovalue(context, mapping):
        item['successors'] = _siblings(
            repo[successor] for successor in item['successors']
        )
        yield item


def succsandmarkers(context, mapping):
    return templateutil.mappinggenerator(_succsandmarkersgen, args=(mapping,))


# teach templater succsandmarkers is switched to (context, mapping) API
succsandmarkers._requires = {'repo', 'ctx'}


def _whyunstablegen(context, mapping):
    repo = context.resource(mapping, 'repo')
    ctx = context.resource(mapping, 'ctx')

    for entry in entries:
        if entry.get('divergentnodes'):
            entry['divergentnodes'] = _siblings(entry['divergentnodes'])
        yield entry


def whyunstable(context, mapping):
    return templateutil.mappinggenerator(_whyunstablegen, args=(mapping,))


whyunstable._requires = {'repo', 'ctx'}


def commonentry(repo, ctx):
    node = scmutil.binnode(ctx)
    return {
        # TODO: perhaps ctx.changectx() should be assigned if ctx is a

        'date': ctx.date(),
        'extra': ctx.extra(),
        'phase': ctx.phasestr(),
        'obsolete': ctx.obsolete(),
        'succsandmarkers': succsandmarkers,
        'instabilities': templateutil.hybridlist(
            ctx.instabilities(), name='instability'
        ),
        'whyunstable': whyunstable,
        'branch': nodebranchnodefault(ctx),
        'inbranch': nodeinbranch(repo, ctx),
        'branches': nodebranchdict(repo, ctx),
        'tags': nodetagsdict(repo, node),
        'bookmarks': nodebookmarksdict(repo, node),
        'parent': lambda context, mapping: parents(ctx),
        'child': lambda context, mapping: children(ctx),
    }


def changelistentry(web, ctx):
    '''Obtain a dictionary to be used for entries in a changelist.

    This function is called when producing items for the "entries" list passed
    to the "shortlog" and "changelog" templates.

    n = scmutil.binnode(ctx)
    showtags = showtag(repo, 'changelogtag', n)
    files = listfilediffs(ctx.files(), n, web.maxfiles)

    entry = commonentry(repo, ctx)
    entry.update(
        {
            'allparents': lambda context, mapping: parents(ctx),
            'parent': lambda context, mapping: parents(ctx, rev - 1),
            'child': lambda context, mapping: children(ctx, rev + 1),
            'changelogtag': showtags,
            'files': files,
        }
    )
    return entry


def changelistentries(web, revs, maxcount, parityfn):
    """Emit up to N records for an iterable of revisions."""
    repo = web.repo

        entry = changelistentry(web, repo[rev])
        entry['parity'] = next(parityfn)

        yield entry


def symrevorshortnode(req, ctx):
    if 'node' in req.qsparams:
        return templatefilters.revescape(req.qsparams['node'])
    else:
        return short(scmutil.binnode(ctx))


def _listfilesgen(context, ctx, stripecount):
    parity = paritygen(stripecount)
    for blockno, f in enumerate(ctx.files()):
        template = 'filenodelink' if f in ctx else 'filenolink'
        yield context.process(
            template,
            {
                'node': ctx.hex(),
                'file': f,
                'blockno': blockno + 1,
                'parity': next(parity),
            },
        )


def changesetentry(web, ctx):
    '''Obtain a dictionary to be used to render the "changeset" template.'''

    showtags = showtag(web.repo, 'changesettag', scmutil.binnode(ctx))
    showbookmarks = showbookmark(
        web.repo, 'changesetbookmark', scmutil.binnode(ctx)
    )
    showbranch = nodebranchnodefault(ctx)

    basectx = basechangectx(web.repo, web.req)
    if basectx is None:
        basectx = ctx.p1()

        symrev=symrevorshortnode(web.req, ctx),
        basenode=basectx.hex(),
        changesettag=showtags,
        changesetbookmark=showbookmarks,
        changesetbranch=showbranch,
        files=templateutil.mappedgenerator(
            _listfilesgen, args=(ctx, web.stripecount)
        ),
        diffsummary=lambda context, mapping: diffsummary(diffstatsgen),
        diffstat=diffstats,
        archives=web.archivelist(ctx.hex()),
        **pycompat.strkwargs(commonentry(web.repo, ctx))
    )


def _listfilediffsgen(context, files, node, max):
    for f in files[:max]:
        yield context.process('filedifflink', {'node': hex(node), 'file': f})
    if len(files) > max:
        yield context.process('fileellipses', {})


def listfilediffs(files, node, max):
    return templateutil.mappedgenerator(
        _listfilediffsgen, args=(files, node, max)
    )


def _prettyprintdifflines(context, lines, blockno, lineidprefix):
    for lineno, l in enumerate(lines, 1):
        difflineno = "%d.%d" % (blockno, lineno)
        if l.startswith('+'):

            ltype = "difflineminus"
        elif l.startswith('@'):
            ltype = "difflineat"
        else:
            ltype = "diffline"
        yield context.process(
            ltype,
            {
                'line': l,
                'lineno': lineno,
                'lineid': lineidprefix + "l%s" % difflineno,
                'linenumber': "% 8s" % difflineno,
            },
        )


def _diffsgen(
    context,
    repo,
    ctx,
    basectx,
    files,
    style,
    stripecount,
    linerange,
    lineidprefix,
):
    if files:
        m = match.exact(files)
    else:
        m = match.always()

                s1, l1, s2, l2 = hunkrange
                if not mdiff.hunkinrange((s2, l2), linerange):
                    continue
            lines.extend(hunklines)
        if lines:
            l = templateutil.mappedgenerator(
                _prettyprintdifflines, args=(lines, blockno, lineidprefix)
            )
            yield {
                'parity': next(parity),
                'blockno': blockno,
                'lines': l,
            }


def diffs(web, ctx, basectx, files, style, linerange=None, lineidprefix=''):
    args = (
        web.repo,
        ctx,
        basectx,
        files,
        style,
        web.stripecount,
        linerange,
        lineidprefix,
    )
    return templateutil.mappinggenerator(_diffsgen, args=args, name='diffblock')


def _compline(type, leftlineno, leftline, rightlineno, rightline):
    lineid = leftlineno and ("l%d" % leftlineno) or ''
    lineid += rightlineno and ("r%d" % rightlineno) or ''
    llno = '%d' % leftlineno if leftlineno else ''

        'rightlineno': rightlineno,
        'rightlinenumber': "% 6s" % rlno,
        'rightline': rightline or '',
    }


def _getcompblockgen(context, leftlines, rightlines, opcodes):
    for type, llo, lhi, rlo, rhi in opcodes:
        type = pycompat.sysbytes(type)
        len1 = lhi - llo
        len2 = rhi - rlo
        count = min(len1, len2)
        for i in pycompat.xrange(count):
            yield _compline(
                type=type,
                leftlineno=llo + i + 1,
                leftline=leftlines[llo + i],
                rightlineno=rlo + i + 1,
                rightline=rightlines[rlo + i],
            )
        if len1 > len2:
            for i in pycompat.xrange(llo + count, lhi):
                yield _compline(
                    type=type,
                    leftlineno=i + 1,
                    leftline=leftlines[i],
                    rightlineno=None,
                    rightline=None,
                )
        elif len2 > len1:
            for i in pycompat.xrange(rlo + count, rhi):
                yield _compline(
                    type=type,
                    leftlineno=None,
                    leftline=None,
                    rightlineno=i + 1,
                    rightline=rightlines[i],
                )


def _getcompblock(leftlines, rightlines, opcodes):
    args = (leftlines, rightlines, opcodes)
    return templateutil.mappinggenerator(
        _getcompblockgen, args=args, name='comparisonline'
    )


def _comparegen(context, contextnum, leftlines, rightlines):
    '''Generator function that provides side-by-side comparison data.'''
    s = difflib.SequenceMatcher(None, leftlines, rightlines)
    if contextnum < 0:

    else:
        for oc in s.get_grouped_opcodes(n=contextnum):
            l = _getcompblock(leftlines, rightlines, oc)
            yield {'lines': l}


def compare(contextnum, leftlines, rightlines):
    args = (contextnum, leftlines, rightlines)
    return templateutil.mappinggenerator(
        _comparegen, args=args, name='comparisonblock'
    )


def diffstatgen(ui, ctx, basectx):
    '''Generator function that provides the diffstat data.'''

    diffopts = patch.diffopts(ui, {'noprefix': False})
    stats = patch.diffstatdata(util.iterlines(ctx.diff(basectx, opts=diffopts)))
    maxname, maxtotal, addtotal, removetotal, binary = patch.diffstatsum(stats)
    while True:
        yield stats, maxname, maxtotal, addtotal, removetotal, binary


def diffsummary(statgen):
    '''Return a short summary of the diff.'''

    stats, maxname, maxtotal, addtotal, removetotal, binary = next(statgen)
    return _(' %d files changed, %d insertions(+), %d deletions(-)\n') % (
        len(stats),
        addtotal,
        removetotal,
    )


def _diffstattmplgen(context, ctx, statgen, parity):
    stats, maxname, maxtotal, addtotal, removetotal, binary = next(statgen)
    files = ctx.files()

    fileno = 0
    for filename, adds, removes, isbinary in stats:
        template = 'diffstatlink' if filename in files else 'diffstatnolink'
        total = adds + removes
        fileno += 1
        yield context.process(
            template,
            {
                'node': ctx.hex(),
                'file': filename,
                'fileno': fileno,
                'total': total,
                'addpct': pct(adds),
                'removepct': pct(removes),
                'parity': next(parity),
            },
        )


def diffstat(ctx, statgen, parity):
    '''Return a diffstat template for each file in the diff.'''
    args = (ctx, statgen, parity)
    return templateutil.mappedgenerator(_diffstattmplgen, args=args)


class sessionvars(templateutil.wrapped):
    def __init__(self, vars, start='?'):
        self._start = start
        self._vars = vars

        raise error.ParseError(_('not filterable'))

    def itermaps(self, context):
        separator = self._start
        for key, value in sorted(self._vars.iteritems()):
            yield {
                'name': key,
                'value': pycompat.bytestr(value),
                'separator': separator,
            }
            separator = '&'

    def join(self, context, mapping, sep):
        # could be '{separator}{name}={value|urlescape}'

    def tobool(self, context, mapping):
        return bool(self._vars)

    def tovalue(self, context, mapping):
        return self._vars


class wsgiui(uimod.ui):
    # default termwidth breaks under mod_wsgi
    def termwidth(self):
        return 80


def getwebsubs(repo):
    websubtable = []
    websubdefs = repo.ui.configitems('websub')
    # we must maintain interhg backwards compatibility

        # identify portions of the pattern, taking care to avoid escaped
        # delimiters. the replace format and flags are optional, but
        # delimiters are required.
        match = re.match(
            br'^s%s(.+)(?:(?<=\\\\)|(?<!\\))%s(.*)%s([ilmsux])*$'
            % (delim, delim, delim),
            pattern,
        )
        if not match:
            repo.ui.warn(
                _("websub: invalid pattern for %s: %s\n") % (key, pattern)
            )
            continue

        # we need to unescape the delimiter for regexp and format
        delim_re = re.compile(br'(?<!\\)\\%s' % delim)
        regexp = delim_re.sub(unesc, match.group(1))

        try:
            regexp = re.compile(regexp, flags)
            websubtable.append((regexp, format))
        except re.error:
            repo.ui.warn(
                _("websub: invalid regexp for %s: %s\n") % (key, regexp)
            )
    return websubtable


def getgraphnode(repo, ctx):
    return templatekw.getgraphnodecurrent(
        repo, ctx
    ) + templatekw.getgraphnodesymbol(ctx)