diff upmana/mercurial/hgweb/webcommands.py @ 121:496dbf12a6cb alpha

Traipse Alpha 'OpenRPG' {091030-00} Traipse is a distribution of OpenRPG that is designed to be easy to setup and go. Traipse also makes it easy for developers to work on code without fear of sacrifice. 'Ornery-Orc' continues the trend of 'Grumpy' and adds fixes to the code. 'Ornery-Orc's main goal is to offer more advanced features and enhance the productivity of the user. Update Summary (Cleaning up for Beta): Adds Bookmarks (Alpha) with cool Smiley Star and Plus Symbol images! Changes made to the map for increased portability. SnowDog has changes planned in Core, though. Added an initial push to the BCG. Not much to see, just shows off how it is re-writing Main code. Fix to remote admin commands Minor fix to texted based server, works in /System/ folder Some Core changes to gametree to correctly disply Pretty Print, thanks David! Fix to Splitter Nodes not being created. Added images to Plugin Control panel for Autostart feature Fix to massive amounts of images loading; from Core fix to gsclient so with_statement imports Added 'boot' command to remote admin Prep work in Pass tool for remote admin rankings and different passwords, ei, Server, Admin, Moderator, etc. Remote Admin Commands more organized, more prep work. Added Confirmation window for sent nodes. Minor changes to allow for portability to an OpenSUSE linux OS (hopefully without breaking) {091028} Made changes to gametree to start working with Element Tree, mostly from Core Minor changes to Map to start working with Element Tree, from Core Preliminary changes to map efficiency, from FlexiRPG Miniatures Layer pop up box allows users to turn off Mini labels, from FlexiRPG Changes to main.py to start working with Element Tree {091029} Changes made to server to start working with Element Tree. Changes made to Meta Server Lib. Prepping test work for a multi meta network page. Minor bug fixed with mini to gametree Zoom Mouse plugin added. {091030} Getting ready for Beta. Server needs debugging so Alpha remains bugged. Plugin UI code cleaned. Auto start works with a graphic, pop-up asks to enable or disable plugin. Update Manager now has a partially working Status Bar. Status Bar captures terminal text, so Merc out put is visible. Manifest.xml file, will be renamed, is now much cleaner. Debug Console has a clear button and a Report Bug button. Prep work for a Term2Win class in Debug Console. Known: Current Alpha fails in Windows.
author sirebral
date Fri, 30 Oct 2009 22:21:40 -0500
parents
children 36919b8a3ef9
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upmana/mercurial/hgweb/webcommands.py	Fri Oct 30 22:21:40 2009 -0500
@@ -0,0 +1,690 @@
+#
+# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>
+# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+import os, mimetypes, re, cgi, copy
+import webutil
+from mercurial import error, archival, templater, templatefilters
+from mercurial.node import short, hex
+from mercurial.util import binary
+from common import paritygen, staticfile, get_contact, ErrorResponse
+from common import HTTP_OK, HTTP_FORBIDDEN, HTTP_NOT_FOUND
+from mercurial import graphmod
+
+# __all__ is populated with the allowed commands. Be sure to add to it if
+# you're adding a new command, or the new command won't work.
+
+__all__ = [
+   'log', 'rawfile', 'file', 'changelog', 'shortlog', 'changeset', 'rev',
+   'manifest', 'tags', 'branches', 'summary', 'filediff', 'diff', 'annotate',
+   'filelog', 'archive', 'static', 'graph',
+]
+
+def log(web, req, tmpl):
+    if 'file' in req.form and req.form['file'][0]:
+        return filelog(web, req, tmpl)
+    else:
+        return changelog(web, req, tmpl)
+
+def rawfile(web, req, tmpl):
+    path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])
+    if not path:
+        content = manifest(web, req, tmpl)
+        req.respond(HTTP_OK, web.ctype)
+        return content
+
+    try:
+        fctx = webutil.filectx(web.repo, req)
+    except error.LookupError, inst:
+        try:
+            content = manifest(web, req, tmpl)
+            req.respond(HTTP_OK, web.ctype)
+            return content
+        except ErrorResponse:
+            raise inst
+
+    path = fctx.path()
+    text = fctx.data()
+    mt = mimetypes.guess_type(path)[0]
+    if mt is None:
+        mt = binary(text) and 'application/octet-stream' or 'text/plain'
+
+    req.respond(HTTP_OK, mt, path, len(text))
+    return [text]
+
+def _filerevision(web, tmpl, fctx):
+    f = fctx.path()
+    text = fctx.data()
+    parity = paritygen(web.stripecount)
+
+    if binary(text):
+        mt = mimetypes.guess_type(f)[0] or 'application/octet-stream'
+        text = '(binary:%s)' % mt
+
+    def lines():
+        for lineno, t in enumerate(text.splitlines(1)):
+            yield {"line": t,
+                   "lineid": "l%d" % (lineno + 1),
+                   "linenumber": "% 6d" % (lineno + 1),
+                   "parity": parity.next()}
+
+    return tmpl("filerevision",
+                file=f,
+                path=webutil.up(f),
+                text=lines(),
+                rev=fctx.rev(),
+                node=hex(fctx.node()),
+                author=fctx.user(),
+                date=fctx.date(),
+                desc=fctx.description(),
+                branch=webutil.nodebranchnodefault(fctx),
+                parent=webutil.parents(fctx),
+                child=webutil.children(fctx),
+                rename=webutil.renamelink(fctx),
+                permissions=fctx.manifest().flags(f))
+
+def file(web, req, tmpl):
+    path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])
+    if not path:
+        return manifest(web, req, tmpl)
+    try:
+        return _filerevision(web, tmpl, webutil.filectx(web.repo, req))
+    except error.LookupError, inst:
+        try:
+            return manifest(web, req, tmpl)
+        except ErrorResponse:
+            raise inst
+
+def _search(web, tmpl, query):
+
+    def changelist(**map):
+        cl = web.repo.changelog
+        count = 0
+        qw = query.lower().split()
+
+        def revgen():
+            for i in xrange(len(cl) - 1, 0, -100):
+                l = []
+                for j in xrange(max(0, i - 100), i + 1):
+                    ctx = web.repo[j]
+                    l.append(ctx)
+                l.reverse()
+                for e in l:
+                    yield e
+
+        for ctx in revgen():
+            miss = 0
+            for q in qw:
+                if not (q in ctx.user().lower() or
+                        q in ctx.description().lower() or
+                        q in " ".join(ctx.files()).lower()):
+                    miss = 1
+                    break
+            if miss:
+                continue
+
+            count += 1
+            n = ctx.node()
+            showtags = webutil.showtag(web.repo, tmpl, 'changelogtag', n)
+            files = webutil.listfilediffs(tmpl, ctx.files(), n, web.maxfiles)
+
+            yield tmpl('searchentry',
+                       parity=parity.next(),
+                       author=ctx.user(),
+                       parent=webutil.parents(ctx),
+                       child=webutil.children(ctx),
+                       changelogtag=showtags,
+                       desc=ctx.description(),
+                       date=ctx.date(),
+                       files=files,
+                       rev=ctx.rev(),
+                       node=hex(n),
+                       tags=webutil.nodetagsdict(web.repo, n),
+                       inbranch=webutil.nodeinbranch(web.repo, ctx),
+                       branches=webutil.nodebranchdict(web.repo, ctx))
+
+            if count >= web.maxchanges:
+                break
+
+    cl = web.repo.changelog
+    parity = paritygen(web.stripecount)
+
+    return tmpl('search',
+                query=query,
+                node=hex(cl.tip()),
+                entries=changelist,
+                archives=web.archivelist("tip"))
+
+def changelog(web, req, tmpl, shortlog = False):
+    if 'node' in req.form:
+        ctx = webutil.changectx(web.repo, req)
+    else:
+        if 'rev' in req.form:
+            hi = req.form['rev'][0]
+        else:
+            hi = len(web.repo) - 1
+        try:
+            ctx = web.repo[hi]
+        except error.RepoError:
+            return _search(web, tmpl, hi) # XXX redirect to 404 page?
+
+    def changelist(limit=0, **map):
+        l = [] # build a list in forward order for efficiency
+        for i in xrange(start, end):
+            ctx = web.repo[i]
+            n = ctx.node()
+            showtags = webutil.showtag(web.repo, tmpl, 'changelogtag', n)
+            files = webutil.listfilediffs(tmpl, ctx.files(), n, web.maxfiles)
+
+            l.insert(0, {"parity": parity.next(),
+                         "author": ctx.user(),
+                         "parent": webutil.parents(ctx, i - 1),
+                         "child": webutil.children(ctx, i + 1),
+                         "changelogtag": showtags,
+                         "desc": ctx.description(),
+                         "date": ctx.date(),
+                         "files": files,
+                         "rev": i,
+                         "node": hex(n),
+                         "tags": webutil.nodetagsdict(web.repo, n),
+                         "inbranch": webutil.nodeinbranch(web.repo, ctx),
+                         "branches": webutil.nodebranchdict(web.repo, ctx)
+                        })
+
+        if limit > 0:
+            l = l[:limit]
+
+        for e in l:
+            yield e
+
+    maxchanges = shortlog and web.maxshortchanges or web.maxchanges
+    cl = web.repo.changelog
+    count = len(cl)
+    pos = ctx.rev()
+    start = max(0, pos - maxchanges + 1)
+    end = min(count, start + maxchanges)
+    pos = end - 1
+    parity = paritygen(web.stripecount, offset=start-end)
+
+    changenav = webutil.revnavgen(pos, maxchanges, count, web.repo.changectx)
+
+    return tmpl(shortlog and 'shortlog' or 'changelog',
+                changenav=changenav,
+                node=hex(ctx.node()),
+                rev=pos, changesets=count,
+                entries=lambda **x: changelist(limit=0,**x),
+                latestentry=lambda **x: changelist(limit=1,**x),
+                archives=web.archivelist("tip"))
+
+def shortlog(web, req, tmpl):
+    return changelog(web, req, tmpl, shortlog = True)
+
+def changeset(web, req, tmpl):
+    ctx = webutil.changectx(web.repo, req)
+    showtags = webutil.showtag(web.repo, tmpl, 'changesettag', ctx.node())
+    showbranch = webutil.nodebranchnodefault(ctx)
+
+    files = []
+    parity = paritygen(web.stripecount)
+    for f in ctx.files():
+        template = f in ctx and 'filenodelink' or 'filenolink'
+        files.append(tmpl(template,
+                          node=ctx.hex(), file=f,
+                          parity=parity.next()))
+
+    parity = paritygen(web.stripecount)
+    diffs = webutil.diffs(web.repo, tmpl, ctx, None, parity)
+    return tmpl('changeset',
+                diff=diffs,
+                rev=ctx.rev(),
+                node=ctx.hex(),
+                parent=webutil.parents(ctx),
+                child=webutil.children(ctx),
+                changesettag=showtags,
+                changesetbranch=showbranch,
+                author=ctx.user(),
+                desc=ctx.description(),
+                date=ctx.date(),
+                files=files,
+                archives=web.archivelist(ctx.hex()),
+                tags=webutil.nodetagsdict(web.repo, ctx.node()),
+                branch=webutil.nodebranchnodefault(ctx),
+                inbranch=webutil.nodeinbranch(web.repo, ctx),
+                branches=webutil.nodebranchdict(web.repo, ctx))
+
+rev = changeset
+
+def manifest(web, req, tmpl):
+    ctx = webutil.changectx(web.repo, req)
+    path = webutil.cleanpath(web.repo, req.form.get('file', [''])[0])
+    mf = ctx.manifest()
+    node = ctx.node()
+
+    files = {}
+    dirs = {}
+    parity = paritygen(web.stripecount)
+
+    if path and path[-1] != "/":
+        path += "/"
+    l = len(path)
+    abspath = "/" + path
+
+    for f, n in mf.iteritems():
+        if f[:l] != path:
+            continue
+        remain = f[l:]
+        elements = remain.split('/')
+        if len(elements) == 1:
+            files[remain] = f
+        else:
+            h = dirs # need to retain ref to dirs (root)
+            for elem in elements[0:-1]:
+                if elem not in h:
+                    h[elem] = {}
+                h = h[elem]
+                if len(h) > 1:
+                    break
+            h[None] = None # denotes files present
+
+    if mf and not files and not dirs:
+        raise ErrorResponse(HTTP_NOT_FOUND, 'path not found: ' + path)
+
+    def filelist(**map):
+        for f in sorted(files):
+            full = files[f]
+
+            fctx = ctx.filectx(full)
+            yield {"file": full,
+                   "parity": parity.next(),
+                   "basename": f,
+                   "date": fctx.date(),
+                   "size": fctx.size(),
+                   "permissions": mf.flags(full)}
+
+    def dirlist(**map):
+        for d in sorted(dirs):
+
+            emptydirs = []
+            h = dirs[d]
+            while isinstance(h, dict) and len(h) == 1:
+                k,v = h.items()[0]
+                if v:
+                    emptydirs.append(k)
+                h = v
+
+            path = "%s%s" % (abspath, d)
+            yield {"parity": parity.next(),
+                   "path": path,
+                   "emptydirs": "/".join(emptydirs),
+                   "basename": d}
+
+    return tmpl("manifest",
+                rev=ctx.rev(),
+                node=hex(node),
+                path=abspath,
+                up=webutil.up(abspath),
+                upparity=parity.next(),
+                fentries=filelist,
+                dentries=dirlist,
+                archives=web.archivelist(hex(node)),
+                tags=webutil.nodetagsdict(web.repo, node),
+                inbranch=webutil.nodeinbranch(web.repo, ctx),
+                branches=webutil.nodebranchdict(web.repo, ctx))
+
+def tags(web, req, tmpl):
+    i = web.repo.tagslist()
+    i.reverse()
+    parity = paritygen(web.stripecount)
+
+    def entries(notip=False,limit=0, **map):
+        count = 0
+        for k, n in i:
+            if notip and k == "tip":
+                continue
+            if limit > 0 and count >= limit:
+                continue
+            count = count + 1
+            yield {"parity": parity.next(),
+                   "tag": k,
+                   "date": web.repo[n].date(),
+                   "node": hex(n)}
+
+    return tmpl("tags",
+                node=hex(web.repo.changelog.tip()),
+                entries=lambda **x: entries(False,0, **x),
+                entriesnotip=lambda **x: entries(True,0, **x),
+                latestentry=lambda **x: entries(True,1, **x))
+
+def branches(web, req, tmpl):
+    b = web.repo.branchtags()
+    tips = (web.repo[n] for t, n in web.repo.branchtags().iteritems())
+    heads = web.repo.heads()
+    parity = paritygen(web.stripecount)
+    sortkey = lambda ctx: ('close' not in ctx.extra(), ctx.rev())
+
+    def entries(limit, **map):
+        count = 0
+        for ctx in sorted(tips, key=sortkey, reverse=True):
+            if limit > 0 and count >= limit:
+                return
+            count += 1
+            if ctx.node() not in heads:
+                status = 'inactive'
+            elif not web.repo.branchheads(ctx.branch()):
+                status = 'closed'
+            else:
+                status = 'open'
+            yield {'parity': parity.next(),
+                   'branch': ctx.branch(),
+                   'status': status,
+                   'node': ctx.hex(),
+                   'date': ctx.date()}
+
+    return tmpl('branches', node=hex(web.repo.changelog.tip()),
+                entries=lambda **x: entries(0, **x),
+                latestentry=lambda **x: entries(1, **x))
+
+def summary(web, req, tmpl):
+    i = web.repo.tagslist()
+    i.reverse()
+
+    def tagentries(**map):
+        parity = paritygen(web.stripecount)
+        count = 0
+        for k, n in i:
+            if k == "tip": # skip tip
+                continue
+
+            count += 1
+            if count > 10: # limit to 10 tags
+                break
+
+            yield tmpl("tagentry",
+                       parity=parity.next(),
+                       tag=k,
+                       node=hex(n),
+                       date=web.repo[n].date())
+
+    def branches(**map):
+        parity = paritygen(web.stripecount)
+
+        b = web.repo.branchtags()
+        l = [(-web.repo.changelog.rev(n), n, t) for t, n in b.iteritems()]
+        for r,n,t in sorted(l):
+            yield {'parity': parity.next(),
+                   'branch': t,
+                   'node': hex(n),
+                   'date': web.repo[n].date()}
+
+    def changelist(**map):
+        parity = paritygen(web.stripecount, offset=start-end)
+        l = [] # build a list in forward order for efficiency
+        for i in xrange(start, end):
+            ctx = web.repo[i]
+            n = ctx.node()
+            hn = hex(n)
+
+            l.insert(0, tmpl(
+               'shortlogentry',
+                parity=parity.next(),
+                author=ctx.user(),
+                desc=ctx.description(),
+                date=ctx.date(),
+                rev=i,
+                node=hn,
+                tags=webutil.nodetagsdict(web.repo, n),
+                inbranch=webutil.nodeinbranch(web.repo, ctx),
+                branches=webutil.nodebranchdict(web.repo, ctx)))
+
+        yield l
+
+    cl = web.repo.changelog
+    count = len(cl)
+    start = max(0, count - web.maxchanges)
+    end = min(count, start + web.maxchanges)
+
+    return tmpl("summary",
+                desc=web.config("web", "description", "unknown"),
+                owner=get_contact(web.config) or "unknown",
+                lastchange=cl.read(cl.tip())[2],
+                tags=tagentries,
+                branches=branches,
+                shortlog=changelist,
+                node=hex(cl.tip()),
+                archives=web.archivelist("tip"))
+
+def filediff(web, req, tmpl):
+    fctx, ctx = None, None
+    try:
+        fctx = webutil.filectx(web.repo, req)
+    except LookupError:
+        ctx = webutil.changectx(web.repo, req)
+        path = webutil.cleanpath(web.repo, req.form['file'][0])
+        if path not in ctx.files():
+            raise
+
+    if fctx is not None:
+        n = fctx.node()
+        path = fctx.path()
+    else:
+        n = ctx.node()
+        # path already defined in except clause
+
+    parity = paritygen(web.stripecount)
+    diffs = webutil.diffs(web.repo, tmpl, fctx or ctx, [path], parity)
+    rename = fctx and webutil.renamelink(fctx) or []
+    ctx = fctx and fctx or ctx
+    return tmpl("filediff",
+                file=path,
+                node=hex(n),
+                rev=ctx.rev(),
+                date=ctx.date(),
+                desc=ctx.description(),
+                author=ctx.user(),
+                rename=rename,
+                branch=webutil.nodebranchnodefault(ctx),
+                parent=webutil.parents(ctx),
+                child=webutil.children(ctx),
+                diff=diffs)
+
+diff = filediff
+
+def annotate(web, req, tmpl):
+    fctx = webutil.filectx(web.repo, req)
+    f = fctx.path()
+    parity = paritygen(web.stripecount)
+
+    def annotate(**map):
+        last = None
+        if binary(fctx.data()):
+            mt = (mimetypes.guess_type(fctx.path())[0]
+                  or 'application/octet-stream')
+            lines = enumerate([((fctx.filectx(fctx.filerev()), 1),
+                                '(binary:%s)' % mt)])
+        else:
+            lines = enumerate(fctx.annotate(follow=True, linenumber=True))
+        for lineno, ((f, targetline), l) in lines:
+            fnode = f.filenode()
+
+            if last != fnode:
+                last = fnode
+
+            yield {"parity": parity.next(),
+                   "node": hex(f.node()),
+                   "rev": f.rev(),
+                   "author": f.user(),
+                   "desc": f.description(),
+                   "file": f.path(),
+                   "targetline": targetline,
+                   "line": l,
+                   "lineid": "l%d" % (lineno + 1),
+                   "linenumber": "% 6d" % (lineno + 1)}
+
+    return tmpl("fileannotate",
+                file=f,
+                annotate=annotate,
+                path=webutil.up(f),
+                rev=fctx.rev(),
+                node=hex(fctx.node()),
+                author=fctx.user(),
+                date=fctx.date(),
+                desc=fctx.description(),
+                rename=webutil.renamelink(fctx),
+                branch=webutil.nodebranchnodefault(fctx),
+                parent=webutil.parents(fctx),
+                child=webutil.children(fctx),
+                permissions=fctx.manifest().flags(f))
+
+def filelog(web, req, tmpl):
+
+    try:
+        fctx = webutil.filectx(web.repo, req)
+        f = fctx.path()
+        fl = fctx.filelog()
+    except error.LookupError:
+        f = webutil.cleanpath(web.repo, req.form['file'][0])
+        fl = web.repo.file(f)
+        numrevs = len(fl)
+        if not numrevs: # file doesn't exist at all
+            raise
+        rev = webutil.changectx(web.repo, req).rev()
+        first = fl.linkrev(0)
+        if rev < first: # current rev is from before file existed
+            raise
+        frev = numrevs - 1
+        while fl.linkrev(frev) > rev:
+            frev -= 1
+        fctx = web.repo.filectx(f, fl.linkrev(frev))
+
+    count = fctx.filerev() + 1
+    pagelen = web.maxshortchanges
+    start = max(0, fctx.filerev() - pagelen + 1) # first rev on this page
+    end = min(count, start + pagelen) # last rev on this page
+    parity = paritygen(web.stripecount, offset=start-end)
+
+    def entries(limit=0, **map):
+        l = []
+
+        repo = web.repo
+        for i in xrange(start, end):
+            iterfctx = fctx.filectx(i)
+
+            l.insert(0, {"parity": parity.next(),
+                         "filerev": i,
+                         "file": f,
+                         "node": hex(iterfctx.node()),
+                         "author": iterfctx.user(),
+                         "date": iterfctx.date(),
+                         "rename": webutil.renamelink(iterfctx),
+                         "parent": webutil.parents(iterfctx),
+                         "child": webutil.children(iterfctx),
+                         "desc": iterfctx.description(),
+                         "tags": webutil.nodetagsdict(repo, iterfctx.node()),
+                         "branch": webutil.nodebranchnodefault(iterfctx),
+                         "inbranch": webutil.nodeinbranch(repo, iterfctx),
+                         "branches": webutil.nodebranchdict(repo, iterfctx)})
+
+        if limit > 0:
+            l = l[:limit]
+
+        for e in l:
+            yield e
+
+    nodefunc = lambda x: fctx.filectx(fileid=x)
+    nav = webutil.revnavgen(end - 1, pagelen, count, nodefunc)
+    return tmpl("filelog", file=f, node=hex(fctx.node()), nav=nav,
+                entries=lambda **x: entries(limit=0, **x),
+                latestentry=lambda **x: entries(limit=1, **x))
+
+
+def archive(web, req, tmpl):
+    type_ = req.form.get('type', [None])[0]
+    allowed = web.configlist("web", "allow_archive")
+    key = req.form['node'][0]
+
+    if type_ not in web.archives:
+        msg = 'Unsupported archive type: %s' % type_
+        raise ErrorResponse(HTTP_NOT_FOUND, msg)
+
+    if not ((type_ in allowed or
+        web.configbool("web", "allow" + type_, False))):
+        msg = 'Archive type not allowed: %s' % type_
+        raise ErrorResponse(HTTP_FORBIDDEN, msg)
+
+    reponame = re.sub(r"\W+", "-", os.path.basename(web.reponame))
+    cnode = web.repo.lookup(key)
+    arch_version = key
+    if cnode == key or key == 'tip':
+        arch_version = short(cnode)
+    name = "%s-%s" % (reponame, arch_version)
+    mimetype, artype, extension, encoding = web.archive_specs[type_]
+    headers = [
+        ('Content-Type', mimetype),
+        ('Content-Disposition', 'attachment; filename=%s%s' % (name, extension))
+    ]
+    if encoding:
+        headers.append(('Content-Encoding', encoding))
+    req.header(headers)
+    req.respond(HTTP_OK)
+    archival.archive(web.repo, req, cnode, artype, prefix=name)
+    return []
+
+
+def static(web, req, tmpl):
+    fname = req.form['file'][0]
+    # a repo owner may set web.static in .hg/hgrc to get any file
+    # readable by the user running the CGI script
+    static = web.config("web", "static", None, untrusted=False)
+    if not static:
+        tp = web.templatepath or templater.templatepath()
+        if isinstance(tp, str):
+            tp = [tp]
+        static = [os.path.join(p, 'static') for p in tp]
+    return [staticfile(static, fname, req)]
+
+def graph(web, req, tmpl):
+    rev = webutil.changectx(web.repo, req).rev()
+    bg_height = 39
+
+    revcount = 25
+    if 'revcount' in req.form:
+        revcount = int(req.form.get('revcount', [revcount])[0])
+        tmpl.defaults['sessionvars']['revcount'] = revcount
+
+    lessvars = copy.copy(tmpl.defaults['sessionvars'])
+    lessvars['revcount'] = revcount / 2
+    morevars = copy.copy(tmpl.defaults['sessionvars'])
+    morevars['revcount'] = revcount * 2
+
+    max_rev = len(web.repo) - 1
+    revcount = min(max_rev, revcount)
+    revnode = web.repo.changelog.node(rev)
+    revnode_hex = hex(revnode)
+    uprev = min(max_rev, rev + revcount)
+    downrev = max(0, rev - revcount)
+    count = len(web.repo)
+    changenav = webutil.revnavgen(rev, revcount, count, web.repo.changectx)
+
+    dag = graphmod.revisions(web.repo, rev, downrev)
+    tree = list(graphmod.colored(dag))
+    canvasheight = (len(tree) + 1) * bg_height - 27;
+    data = []
+    for (id, type, ctx, vtx, edges) in tree:
+        if type != graphmod.CHANGESET:
+            continue
+        node = short(ctx.node())
+        age = templatefilters.age(ctx.date())
+        desc = templatefilters.firstline(ctx.description())
+        desc = cgi.escape(templatefilters.nonempty(desc))
+        user = cgi.escape(templatefilters.person(ctx.user()))
+        branch = ctx.branch()
+        branch = branch, web.repo.branchtags().get(branch) == ctx.node()
+        data.append((node, vtx, edges, desc, user, age, branch, ctx.tags()))
+
+    return tmpl('graph', rev=rev, revcount=revcount, uprev=uprev,
+                lessvars=lessvars, morevars=morevars, downrev=downrev,
+                canvasheight=canvasheight, jsdata=data, bg_height=bg_height,
+                node=revnode_hex, changenav=changenav)