comparison mercurial/hgweb/hgweb_mod.py @ 18627:4e949b8e0930

hgweb: add websub template filter

The purpose of this new filter is to make it possible to partially replace the
functionality of the interhg extension. The idea is to be able to define regular
expression based substitutions on a new "websub" config section. hgweb will then
be able to apply these substitutions wherever the "websub" filter is used on a
template.

This first revision just adds the code necessary to load the websub expressions
and adds the websub filter, but it does not add any calls to the websub filter
itself on any of the templates. That will be done on the following revisions.

18626:b114e41c4df3

# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import os
from mercurial import ui, hg, hook, error, encoding, templater, util, repoview
from common import get_stat, ErrorResponse, permhooks, caching
from common import HTTP_OK, HTTP_NOT_MODIFIED, HTTP_BAD_REQUEST
from common import HTTP_NOT_FOUND, HTTP_SERVER_ERROR
from request import wsgirequest
import webcommands, protocol, webutil

perms = {
    'changegroup': 'pull',
    'changegroupsubset': 'pull',
    'getbundle': 'pull',

        self.archives = 'zip', 'gz', 'bz2'
        self.stripecount = 1
        # a repo owner may set web.templates in .hg/hgrc to get any file
        # readable by the user running the CGI script
        self.templatepath = self.config('web', 'templates')

    # The CGI scripts are often run by a user different from the repo owner.
    # Trust the settings from the .hg/hgrc files by default.
    def config(self, section, name, default=None, untrusted=True):
        return self.repo.ui.config(section, name, default,

            if inst.code == HTTP_NOT_MODIFIED:
                # Not allowed to return a body on a 304
                return ['']
            return tmpl('error', error=inst.message)

    def templater(self, req):

        # determine scheme, port and server name
        # this is needed to create absolute urls

        if not self.reponame:
            self.reponame = (self.config("web", "name")
                             or req.env.get('REPO_NAME')
                             or req.url.strip('/') or self.repo.root)

        # create the templater

        tmpl = templater.templater(mapfile,
                                   defaults={"url": req.url,
                                             "logourl": logourl,
                                             "logoimg": logoimg,
                                             "staticurl": staticurl,
                                             "urlbase": urlbase,

18627:4e949b8e0930

# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import os
from mercurial import ui, hg, hook, error, encoding, templater, util, repoview
from mercurial.templatefilters import websub
from mercurial.i18n import _
from common import get_stat, ErrorResponse, permhooks, caching
from common import HTTP_OK, HTTP_NOT_MODIFIED, HTTP_BAD_REQUEST
from common import HTTP_NOT_FOUND, HTTP_SERVER_ERROR
from request import wsgirequest
import webcommands, protocol, webutil, re

perms = {
    'changegroup': 'pull',
    'changegroupsubset': 'pull',
    'getbundle': 'pull',

        self.archives = 'zip', 'gz', 'bz2'
        self.stripecount = 1
        # a repo owner may set web.templates in .hg/hgrc to get any file
        # readable by the user running the CGI script
        self.templatepath = self.config('web', 'templates')
        self.websubtable = self.loadwebsub()

    # The CGI scripts are often run by a user different from the repo owner.
    # Trust the settings from the .hg/hgrc files by default.
    def config(self, section, name, default=None, untrusted=True):
        return self.repo.ui.config(section, name, default,

            if inst.code == HTTP_NOT_MODIFIED:
                # Not allowed to return a body on a 304
                return ['']
            return tmpl('error', error=inst.message)

    def loadwebsub(self):
        websubtable = []
        websubdefs = self.repo.ui.configitems('websub')
        for key, pattern in websubdefs:
            # grab the delimiter from the character after the "s"
            unesc = pattern[1]
            delim = re.escape(unesc)

            # 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(
                r'^s%s(.+)(?:(?<=\\\\)|(?<!\\))%s(.*)%s([ilmsux])*$'
                % (delim, delim, delim), pattern)
            if not match:
                self.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(r'(?<!\\)\\%s' % delim)
            regexp = delim_re.sub(unesc, match.group(1))
            format = delim_re.sub(unesc, match.group(2))

            # the pattern allows for 6 regexp flags, so set them if necessary
            flagin = match.group(3)
            flags = 0
            if flagin:
                for flag in flagin.upper():
                    flags |= re.__dict__[flag]

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

    def templater(self, req):

        # determine scheme, port and server name
        # this is needed to create absolute urls

        if not self.reponame:
            self.reponame = (self.config("web", "name")
                             or req.env.get('REPO_NAME')
                             or req.url.strip('/') or self.repo.root)

        def websubfilter(text):
            return websub(text, self.websubtable)

        # create the templater

        tmpl = templater.templater(mapfile,
                                   filters={"websub": websubfilter},
                                   defaults={"url": req.url,
                                             "logourl": logourl,
                                             "logoimg": logoimg,
                                             "staticurl": staticurl,
                                             "urlbase": urlbase,